k8s的1.15.1高可用版本(Centos:7.9)
Posted 村里唯一的运维
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1. 软件版本
首先要把centos7系统的内核升级最好4.4以上(默认3.10的内核,运行大规模docker的时候会有bug)
| 软件/系统 | 版本 | 备注 |
|---|---|---|
| Centos | 7.9 | 最小安装版 |
| k8s | 1.15.1 | |
| flannel | 0.11 | |
| etcd | 3.3.10 |
2. 角色分配
| k8s角色 | 主机名 | 节点IP | 备注 |
|---|---|---|---|
| master1+etcd1 | master1.host.com | 10.0.0.70 | master节点 |
| master2+etcd2 | master2.host.com | 10.0.0.71 | |
| master3+etcd3 | master3.host.com | 10.0.0.72 | |
| node1 | node1.host.com | 10.0.0.73 | node节点 |
| node2 | node2.host.com | 10.0.0.74 | |
| haproxy1+keepalived | haproxy1.host.com | 10.0.0.75 | 负载均衡(vip:10.0.0.80) |
| haproxy2+keepalived | haproxy2.host.com | 10.0.0.76 |
3. 安装流程
第1个里程: 初始化工具安装
所有节点都执行
点击查看代码
yum install net-tools vim wget -y
第2个里程: 关闭防火墙与Selinux
所有节点都执行
systemctl stop firewalld
systemctl disable firewalld
sed -i "s/SELINUX=enforcing/SELINUX=disabled/g" /etc/selinux/config
reboot
第3个里程: 设置时区
所有节点都执行
\\cp /usr/share/zoneinfo/Asia/Shanghai /etc/localtime -rf
第4个里程: 关闭交换分区
所有节点都执行
swapoff -a
sed -i \'/ swap / s/^\\(.*\\)$/#\\1/g\' /etc/fstab
第5个里程：设置系统时间同步
所有节点都执行
yum install -y ntpdate
ntpdate -u ntp.aliyun.com
echo "*/5 * * * * ntpdate ntp.aliyun.com >/dev/null 2>&1" >> /etc/crontab
systemctl start crond.service
systemctl enable crond.service
第6个里程: 设置主机名
cat > /etc/hosts <<EOF
127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4
::1 localhost localhost.localdomain localhost6 localhost6.localdomain6
10.0.0.70 master1.host.com
10.0.0.71 master2.host.com
10.0.0.72 master3.host.com
10.0.0.73 node1.host.com
10.0.0.74 node2.host.com
10.0.0.75 haproxy1.host.com
10.0.0.76 haproxy2.host.com
EOF
第7个里程: 免密钥登录
master执行脚本即可
yum install sshpass -y
cat > scp.sh << EOF
#!/bin/sh
IP="10.0.0.70
10.0.0.71
10.0.0.72
10.0.0.73
10.0.0.74
10.0.0.75
10.0.0.76
"
for node in $IP
do
sshpass -p123456 ssh-copy-id -i /root/.ssh/id_rsa.pub $node -o StrictHostKeyChecking=no &>/dev/null
if [ $? -eq 0 ];then
echo "$node 秘钥copy完成"
else
echo "$node 秘钥copy失败"
fi
done
EOF
第8个里程：优化内核参数
master和node节点
cat >/etc/sysctl.d/kubernetes.conf <<EOF
net.bridge.bridge-nf-call-iptables=1
net.bridge.bridge-nf-call-ip6tables=1
net.ipv4.ip_forward=1
vm.swappiness=0
fs.file-max=52706963
fs.nr_open=52706963
EOF
sysctl -p
第9个里程: 配置高可用
安装keepalived
安装
2台haproxy都要安装
yum install -y keepalived
编写配置文件
haproxy1配置成master
cat >/etc/keepalived/keepalived.conf<<EOF
! Configuration File for keepalived
global_defs
router_id KUB_LVS
vrrp_instance VI_1
state MASTER
interface eth0
virtual_router_id 66
priority 100
advert_int 1
authentication
auth_type PASS
auth_pass 1111
virtual_ipaddress
10.0.0.80/24 dev eth0 label eth0:1
EOF
haproxy2配置成BACKUP
cat >/etc/keepalived/keepalived.conf<<EOF
! Configuration File for keepalived
global_defs
router_id KUB_LVS
vrrp_instance VI_1
state BACKUP
interface eth0
virtual_router_id 66
priority 80
advert_int 1
authentication
auth_type PASS
auth_pass 1111
virtual_ipaddress
10.0.0.80/24 dev eth0 label eth0:1
EOF
设置keepalived开机自启动
systemctl start keepalived
systemctl enable keepalived
安装haproxy(2台节点只需要修改对应的地址即可)
安装
1. 上传软件包
root@haproxy1:/usr/local/src# ll
total 3792
drwxr-xr-x 4 root root 96 Jun 9 14:01 ./
drwxr-xr-x 10 root root 140 Jun 9 14:02 ../
drwxrwxr-x 13 root root 4096 Jun 9 14:16 haproxy-2.4.4/
-rw-r--r-- 1 root root 3570069 May 24 10:25 haproxy-2.4.4.tar.gz
drwxr-xr-x 4 1026 ygw 58 Jun 27 2018 lua-5.3.5/
-rw-r--r-- 1 root root 303543 Nov 16 2020 lua-5.3.5.tar.gz
2. 做软连接
ln -s /usr/local/src/lua-5.3.5 /usr/local/lua
ln -s /usr/local/src/haproxy-2.4.4 /usr/local/haproxy
3. 编译安装lua
1)安装依赖
yum install gcc gcc-c++ readline-devel glibc glibc-devel pcre pcre-devel openssl-devel zlib-devel systemd-devel -y
cd /usr/local/lua && make linux
查看编译安装的版本
/usr/local/lua/src/lua -v
Lua 5.3.5 Copyright (C) 1994-2018 Lua.org, PUC-Rio
4. 编译安装haproxy
cd /usr/local/src/haproxy-2.4.4 && make TARGET=linux-glibc USE_PCRE=1 USE_OPENSSL=1 USE_ZLIB=1 USE_SYSTEMD=1 USE_LUA=1 LUA_INC=/usr/local/lua/src/ LUA_LIB=/usr/local/lua/src/ && make install PREFIX=/apps/haproxy
5. 方便命令的调用
ln -s /apps/haproxy/sbin/haproxy /usr/sbin/
6. 查看版本
haproxy -v
编写haproxy配置文件
mkdir /etc/haproxy
cat >/etc/haproxy/haproxy.cfg<<EOF
global
log 127.0.0.1 local2 info
chroot /apps/haproxy
pidfile /var/lib/haproxy/haproxy.pid
stats socket /var/lib/haproxy/haproxy.sock mode 600 level admin
maxconn 100000
user haproxy
group haproxy
daemon
defaults
mode http
option http-keep-alive
option forwardfor
timeout connect 300000ms
timeout client 300000ms
timeout server 300000ms
maxconn 100000
listen stats
mode http
bind 0.0.0.0:9999
stats enable
log global
stats uri /haproxy-status
stats auth haadmin:123456
listen k8s-api-6443
bind 10.0.0.80:6443
mode tcp
log global
server master1 10.0.0.70:6443 check inter 3000 fall 3 rise 5
server master2 10.0.0.71:6443 check inter 3000 fall 3 rise 5
server master3 10.0.0.72:6443 check inter 3000 fall 3 rise 5
EOF
编写haproxy的service文件
cat >/etc/systemd/system/haproxy.service<<EOF
[Unit]
Description=HAProxy Load Balancer
After=syslog.target network.target
[Service]
ExecStartPre=/usr/sbin/haproxy -f /etc/haproxy/haproxy.cfg -c -q
ExecStart=/usr/sbin/haproxy -Ws -f /etc/haproxy/haproxy.cfg -p /var/lib/haproxy/haproxy.pid
ExecReload=/bin/kill -USR2 $MAINPID
[Install]
WantedBy=multi-user.target
EOF
设置用户和目录权限
mkdir /var/lib/haproxy
useradd -r -s /sbin/nologin -d /var/lib/haproxy haproxy
设置haproxy开机自启动
systemctl daemon-reload
systemctl start haproxy
systemctl enable haproxy
第10个里程: 配置证书
下载自签名证书生成工具
Master1上操作
mkdir /soft && cd /soft
wget https://pkg.cfssl.org/R1.2/cfssl_linux-amd64
wget https://pkg.cfssl.org/R1.2/cfssljson_linux-amd64
wget https://pkg.cfssl.org/R1.2/cfssl-certinfo_linux-amd64
chmod +x cfssl_linux-amd64 cfssljson_linux-amd64 cfssl-certinfo_linux-amd64
mv cfssl_linux-amd64 /usr/local/bin/cfssl
mv cfssljson_linux-amd64 /usr/local/bin/cfssljson
mv cfssl-certinfo_linux-amd64 /usr/bin/cfssl-certinfo
生成ETCD证书
创建目录(master1)
mkdir /root/etcd && cd /root/etcd
证书配置
Master1
cd /root/etcd
cat << EOF | tee ca-config.json
"signing":
"default":
"expiry": "876000h"
,
"profiles":
"www":
"expiry": "876000h",
"usages": [
"signing",
"key encipherment",
"server auth",
"client auth"
]
EOF
创建CA证书请求文件
cd /root/etcd
cat << EOF | tee ca-csr.json
"CA":"expiry":"876000h",
"CN": "etcd CA",
"key":
"algo": "rsa",
"size": 2048
,
"names": [
"C": "CN",
"L": "Beijing",
"ST": "Beijing"
]
EOF
创建ETCD证书请求文件
可以把所有的master IP 加入到csr文件中(Master1上执行)
cd /root/etcd
cat << EOF | tee server-csr.json
"CN": "etcd",
"hosts": [
"master-1",
"master-2",
"master-3",
"192.168.3.200",
"192.168.3.201",
"192.168.3.202"
],
"key":
"algo": "rsa",
"size": 2048
,
"names": [
"C": "CN",
"L": "Beijing",
"ST": "Beijing"
]
EOF
生成 ETCD CA 证书和ETCD公私钥(Master-1上执行)
cd /root/etcd/
cfssl gencert -initca ca-csr.json | cfssljson -bare ca -
[root@master1 etcd]# ll
total 24
-rw-r--r-- 1 root root 289 Mar 5 07:40 ca-config.json #ca 的配置文件
-rw-r--r-- 1 root root 956 Mar 5 07:51 ca.csr #ca 证书生成文件
-rw-r--r-- 1 root root 209 Mar 5 07:45 ca-csr.json #ca 证书请求文件
-rw------- 1 root root 1679 Mar 5 07:51 ca-key.pem #ca 证书key
-rw-r--r-- 1 root root 1265 Mar 5 07:51 ca.pem #ca 证书
-rw-r--r-- 1 root root 350 Mar 5 07:48 server-csr.json
生成etcd证书(Master-1)
cd /root/etcd/
cfssl gencert -ca=ca.pem -ca-key=ca-key.pem -config=ca-config.json -profile=www server-csr.json | cfssljson -bare server
[root@master1 etcd]# ll
total 36
-rw-r--r-- 1 root root 289 Mar 5 07:40 ca-config.json
-rw-r--r-- 1 root root 956 Mar 5 07:51 ca.csr
-rw-r--r-- 1 root root 209 Mar 5 07:45 ca-csr.json
-rw------- 1 root root 1679 Mar 5 07:51 ca-key.pem
-rw-r--r-- 1 root root 1265 Mar 5 07:51 ca.pem
-rw-r--r-- 1 root root 1086 Mar 5 07:54 server.csr
-rw-r--r-- 1 root root 350 Mar 5 07:48 server-csr.json
-rw------- 1 root root 1679 Mar 5 07:54 server-key.pem #etcd客户端使用
-rw-r--r-- 1 root root 1415 Mar 5 07:54 server.pem
创建 Kubernetes 相关证书
此证书用于Kubernetes节点直接的通信, 与之前的ETCD证书不同. （Master-1）
创建目录（Master-1）
mkdir /root/kubernetes/ && cd /root/kubernetes/
配置ca 文件（Master-1）
cd /root/kubernetes/
cat << EOF | tee ca-config.json
"signing":
"default":
"expiry": "876000h"
,
"profiles":
"kubernetes":
"expiry": "876000h",
"usages": [
"signing",
"key encipherment",
"server auth",
"client auth"
]
EOF
[root@master1 kubernetes]# ll
total 4
-rw-r--r-- 1 root root 296 Mar 5 07:58 ca-config.json
创建ca证书申请文件(Master-1)
cd /root/kubernetes/
cat << EOF | tee ca-csr.json
"CA": "expiry": "876000h" ,
"CN": "kubernetes",
"key":
"algo": "rsa",
"size": 2048
,
"names": [
"C": "CN",
"L": "Beijing",
"ST": "Beijing",
"O": "k8s",
"OU": "System"
]
EOF
[root@master1 kubernetes]# ll
total 8
-rw-r--r-- 1 root root 296 Mar 5 07:58 ca-config.json
-rw-r--r-- 1 root root 264 Mar 5 08:02 ca-csr.json
生成API SERVER证书申请文件(Master-1)
cd /root/kubernetes/
cat << EOF | tee server-csr.json
"CN": "kubernetes",
"hosts": [
"192.168.0.1", # service网段
"127.0.0.1",
"192.168.0.2", #将来DNS需要用的地址
"10.0.0.70",
"10.0.0.71",
"10.0.0.72",
"10.0.0.73",
"10.0.0.74",
"10.0.0.80",
"master1.host.com",
"master2.host.com",
"master3.host.com",
"node1.host.com",
"node2.host.com",
"kubernetes",
"kubernetes.default",
"kubernetes.default.svc",
"kubernetes.default.svc.cluster",
"kubernetes.default.svc.cluster.local"
],
"key":
"algo": "rsa",
"size": 2048
,
"names": [
"C": "CN",
"L": "Beijing",
"ST": "Beijing",
"O": "k8s",
"OU": "System"
]
EOF
[root@master1 kubernetes]# ll
total 12
-rw-r--r-- 1 root root 296 Mar 5 07:58 ca-config.json
-rw-r--r-- 1 root root 264 Mar 5 08:02 ca-csr.json
-rw-r--r-- 1 root root 681 Mar 5 08:21 server-csr.json
创建 Kubernetes Proxy 证书申请文件(Master-1)
cd /root/kubernetes/
cat << EOF | tee kube-proxy-csr.json
"CN": "system:kube-proxy",
"hosts": [],
"key":
"algo": "rsa",
"size": 2048
,
"names": [
"C": "CN",
"L": "Beijing",
"ST": "Beijing",
"O": "k8s",
"OU": "System"
]
EOF
生成 kubernetes CA 证书和公私钥
生成ca证书(Master-1)
[root@master1 kubernetes]# pwd
/root/kubernetes
cfssl gencert -initca ca-csr.json | cfssljson -bare ca -
[root@master1 kubernetes]# ll
total 28
-rw-r--r-- 1 root root 296 Mar 5 07:58 ca-config.json
-rw-r--r-- 1 root root 1001 Mar 5 08:23 ca.csr
-rw-r--r-- 1 root root 264 Mar 5 08:02 ca-csr.json
-rw------- 1 root root 1679 Mar 5 08:23 ca-key.pem
-rw-r--r-- 1 root root 1359 Mar 5 08:23 ca.pem
-rw-r--r-- 1 root root 230 Mar 5 08:23 kube-proxy-csr.json
-rw-r--r-- 1 root root 681 Mar 5 08:21 server-csr.json
生成 api-server 证书(Master-1)
[root@master1 kubernetes]# pwd
/root/kubernetes
cfssl gencert -ca=ca.pem -ca-key=ca-key.pem -config=ca-config.json -profile=kubernetes server-csr.json | cfssljson -bare server
[root@master1 kubernetes]# ll
total 40
-rw-r--r-- 1 root root 296 Mar 5 07:58 ca-config.json
-rw-r--r-- 1 root root 1001 Mar 5 08:23 ca.csr
-rw-r--r-- 1 root root 264 Mar 5 08:02 ca-csr.json
-rw------- 1 root root 1679 Mar 5 08:23 ca-key.pem
-rw-r--r-- 1 root root 1359 Mar 5 08:23 ca.pem
-rw-r--r-- 1 root root 230 Mar 5 08:23 kube-proxy-csr.json
-rw-r--r-- 1 root root 1419 Mar 5 08:25 server.csr
-rw-r--r-- 1 root root 681 Mar 5 08:21 server-csr.json
-rw------- 1 root root 1679 Mar 5 08:25 server-key.pem
-rw-r--r-- 1 root root 1785 Mar 5 08:25 server.pem
生成 kube-proxy 证书(Master-1)
[root@master1 kubernetes]# pwd
/root/kubernetes
cfssl gencert -ca=ca.pem -ca-key=ca-key.pem -config=ca-config.json -profile=kubernetes kube-proxy-csr.json | cfssljson -bare kube-proxy
[root@master1 kubernetes]# ll
total 52
-rw-r--r-- 1 root root 296 Mar 5 07:58 ca-config.json
-rw-r--r-- 1 root root 1001 Mar 5 08:23 ca.csr
-rw-r--r-- 1 root root 264 Mar 5 08:02 ca-csr.json
-rw------- 1 root root 1679 Mar 5 08:23 ca-key.pem
-rw-r--r-- 1 root root 1359 Mar 5 08:23 ca.pem
-rw-r--r-- 1 root root 1009 Mar 5 08:27 kube-proxy.csr
-rw-r--r-- 1 root root 230 Mar 5 08:23 kube-proxy-csr.json
-rw------- 1 root root 1679 Mar 5 08:27 kube-proxy-key.pem
-rw-r--r-- 1 root root 1403 Mar 5 08:27 kube-proxy.pem
-rw-r--r-- 1 root root 1419 Mar 5 08:25 server.csr
-rw-r--r-- 1 root root 681 Mar 5 08:21 server-csr.json
-rw------- 1 root root 1679 Mar 5 08:25 server-key.pem
-rw-r--r-- 1 root root 1785 Mar 5 08:25 server.pem
第11个里程: 部署ETCD
下载etcd二进制安装文件（所有master）
mkdir -p /soft && cd /soft
wget https://github.com/etcd-io/etcd/releases/download/v3.3.10/etcd-v3.3.10-linux-amd64.tar.gz
tar -xvf etcd-v3.3.10-linux-amd64.tar.gz
cd etcd-v3.3.10-linux-amd64/
cp etcd etcdctl /usr/local/bin/
编辑etcd配置文件（所有master）
注意修改每个节点的ETCD_NAME
注意修改每个节点的监听地址
mkdir -p /etc/etcd/cfg,ssl
cat >/etc/etcd/cfg/etcd.conf<<EOF
#[Member]
ETCD_NAME="master1.host.com"
ETCD_DATA_DIR="/var/lib/etcd/default.etcd"
ETCD_LISTEN_PEER_URLS="https://10.0.0.70:2380"
ETCD_LISTEN_CLIENT_URLS="https://10.0.0.70:2379,http://10.0.0.70:2390"
#[Clustering]
ETCD_INITIAL_ADVERTISE_PEER_URLS="https://10.0.0.70:2380"
ETCD_ADVERTISE_CLIENT_URLS="https://10.0.0.70:2379"
ETCD_INITIAL_CLUSTER="master1.host.com=https://10.0.0.70:2380,master2.host.com=https://10.0.0.71:2380,master3.host.com=https://10.0.0.72:2380"
ETCD_INITIAL_CLUSTER_TOKEN="etcd-cluster"
ETCD_INITIAL_CLUSTER_STATE="new"
EOF
mkdir -p /etc/etcd/cfg,ssl
cat >/etc/etcd/cfg/etcd.conf<<EOF
#[Member]
ETCD_NAME="master2.host.com"
ETCD_DATA_DIR="/var/lib/etcd/default.etcd"
ETCD_LISTEN_PEER_URLS="https://10.0.0.71:2380"
ETCD_LISTEN_CLIENT_URLS="https://10.0.0.71:2379,http://10.0.0.71:2390"
#[Clustering]
ETCD_INITIAL_ADVERTISE_PEER_URLS="https://10.0.0.71:2380"
ETCD_ADVERTISE_CLIENT_URLS="https://10.0.0.71:2379"
ETCD_INITIAL_CLUSTER="master1.host.com=https://10.0.0.70:2380,master2.host.com=https://10.0.0.71:2380,master3.host.com=https://10.0.0.72:2380"
ETCD_INITIAL_CLUSTER_TOKEN="etcd-cluster"
ETCD_INITIAL_CLUSTER_STATE="new"
EOF
mkdir -p /etc/etcd/cfg,ssl
cat >/etc/etcd/cfg/etcd.conf<<EOF
#[Member]
ETCD_NAME="master3.host.com"
ETCD_DATA_DIR="/var/lib/etcd/default.etcd"
ETCD_LISTEN_PEER_URLS="https://10.0.0.72:2380"
ETCD_LISTEN_CLIENT_URLS="https://10.0.0.72:2379,http://10.0.0.72:2390"
#[Clustering]
ETCD_INITIAL_ADVERTISE_PEER_URLS="https://10.0.0.72:2380"
ETCD_ADVERTISE_CLIENT_URLS="https://10.0.0.72:2379"
ETCD_INITIAL_CLUSTER="master1.host.com=https://10.0.0.70:2380,master2.host.com=https://10.0.0.71:2380,master3.host.com=https://10.0.0.72:2380"
ETCD_INITIAL_CLUSTER_TOKEN="etcd-cluster"
ETCD_INITIAL_CLUSTER_STATE="new"
EOF
创建ETCD的系统启动服务（所有master）
cat > /usr/lib/systemd/system/etcd.service<<EOF
[Unit]
Description=Etcd Server
After=network.target
After=network-online.target
Wants=network-online.target
[Service]
Type=notify
EnvironmentFile=/etc/etcd/cfg/etcd.conf
ExecStart=/usr/local/bin/etcd \\
--name=\\$ETCD_NAME \\
--data-dir=\\$ETCD_DATA_DIR \\
--listen-peer-urls=\\$ETCD_LISTEN_PEER_URLS \\
--listen-client-urls=\\$ETCD_LISTEN_CLIENT_URLS,http://127.0.0.1:2379 \\
--advertise-client-urls=\\$ETCD_ADVERTISE_CLIENT_URLS \\
--initial-advertise-peer-urls=\\$ETCD_INITIAL_ADVERTISE_PEER_URLS \\
--initial-cluster=\\$ETCD_INITIAL_CLUSTER \\
--initial-cluster-token=\\$ETCD_INITIAL_CLUSTER_TOKEN \\
--initial-cluster-state=new \\
--cert-file=/etc/etcd/ssl/server.pem \\
--key-file=/etc/etcd/ssl/server-key.pem \\
--peer-cert-file=/etc/etcd/ssl/server.pem \\
--peer-key-file=/etc/etcd/ssl/server-key.pem \\
--trusted-ca-file=/etc/etcd/ssl/ca.pem \\
--peer-trusted-ca-file=/etc/etcd/ssl/ca.pem
Restart=on-failure
LimitNOFILE=65536
[Install]
WantedBy=multi-user.target
EOF
复制etcd证书到指定目录(master1)
\\cp /root/etcd/*pem /etc/etcd/ssl/
scp /etc/etcd/ssl/* 10.0.0.71:/etc/etcd/ssl/
scp /etc/etcd/ssl/* 10.0.0.72:/etc/etcd/ssl/
拷贝到node节点上要现在node上创建相关目录mkdir -p /etc/etcd/cfg,ssl
scp /etc/etcd/ssl/* 10.0.0.73:/etc/etcd/ssl/
scp /etc/etcd/ssl/* 10.0.0.74:/etc/etcd/ssl/
启动etcd (master节点)
systemctl start etcd
systemctl enable etcd
systemctl status etcd
启动的时候master1会先挂起
检查etcd 集群是否运行正常
etcdctl --ca-file=/etc/etcd/ssl/ca.pem --cert-file=/etc/etcd/ssl/server.pem --key-file=/etc/etcd/ssl/server-key.pem --endpoints="https://10.0.0.70:2379" cluster-health
member 55829f95b702c087 is healthy: got healthy result from https://10.0.0.71:2379
member b1f1be65c0a2eb31 is healthy: got healthy result from https://10.0.0.72:2379
member b5d8162db028bc4e is healthy: got healthy result from https://10.0.0.70:2379
cluster is healthy
第12个里程: 所有node节点安装docker
参考docker安装文档
第13个里程: 创建Docker所需分配POD 网段(任意master节点)
etcdctl --ca-file=/etc/etcd/ssl/ca.pem \\
--cert-file=/etc/etcd/ssl/server.pem --key-file=/etc/etcd/ssl/server-key.pem \\
--endpoints="https://10.0.0.70:2379,https://10.0.0.71:2379,https://10.0.0.72:2379" \\
set /coreos.com/network/config \\
\' "Network": "172.17.0.0/16", "Backend": "Type": "vxlan"\'
检查
etcdctl \\
--endpoints=https://10.0.0.70:2379,https://10.0.0.71:2379,https://10.0.0.72:2379 \\
--ca-file=/etc/etcd/ssl/ca.pem \\
--cert-file=/etc/etcd/ssl/server.pem \\
--key-file=/etc/etcd/ssl/server-key.pem \\
get /coreos.com/network/config
第14个里程: 部署flannel
安装
所有节点都要安装
cd /soft
tar xf flannel-v0.11.0-linux-amd64.tar.gz
mv flanneld mk-docker-opts.sh /usr/local/bin/
拷贝到其他节点上
scp /usr/local/bin/flanneld 10.0.0.71:/usr/local/bin
scp /usr/local/bin/mk-docker-opts.sh 10.0.0.71:/usr/local/bin
scp /usr/local/bin/flanneld 10.0.0.72:/usr/local/bin
scp /usr/local/bin/mk-docker-opts.sh 10.0.0.72:/usr/local/bin
scp /usr/local/bin/flanneld 10.0.0.73:/usr/local/bin
scp /usr/local/bin/mk-docker-opts.sh 10.0.0.73:/usr/local/bin
scp /usr/local/bin/flanneld 10.0.0.74:/usr/local/bin
scp /usr/local/bin/mk-docker-opts.sh 10.0.0.74:/usr/local/bin
配置flannel
所有k8s节点
mkdir -p /etc/flannel
cat > /etc/flannel/flannel.cfg<<EOF
FLANNEL_OPTIONS="-etcd-endpoints=https://10.0.0.70:2379,https://10.0.0.71:2379,https://10.0.0.72:2379 -etcd-cafile=/etc/etcd/ssl/ca.pem -etcd-certfile=/etc/etcd/ssl/server.pem -etcd-keyfile=/etc/etcd/ssl/server-key.pem"
EOF
编写flannel启动文件
所有k8s节点
cat > /usr/lib/systemd/system/flanneld.service <<EOF
[Unit]
Description=Flanneld overlay address etcd agent
After=network-online.target network.target
Before=docker.service
[Service]
Type=notify
EnvironmentFile=/etc/flannel/flannel.cfg
ExecStart=/usr/local/bin/flanneld --ip-masq \\$FLANNEL_OPTIONS
ExecStartPost=/usr/local/bin/mk-docker-opts.sh -k DOCKER_NETWORK_OPTIONS -d /run/flannel/subnet.env
Restart=on-failure
[Install]
WantedBy=multi-user.target
EOF
启动flannel
所有节点
systemctl daemon-reload
systemctl start flanneld.service
systemctl enable flanneld.service
修改docker启动使用flannel的配置
这一步的目的是让docker和flannel运行在同一个网段
systemctl daemon-reload
systemctl restart docker
检查是否和flannel在同一个网段
可以在任意一台master能否ping通172.17.1.1
Node 节点验证是否可以访问其他节点Docker0
第15个里程: 安装Master 组件
Master端需要安装的组件如下:
kube-apiserver
kube-scheduler
kube-controller-manager
安装Api Server服务
下载Kubernetes二进制包(1.15.1)
在master1上解压后传到其它的master上
cd /soft
tar xvf kubernetes-server-linux-amd64.tar.gz
cd kubernetes/server/bin/
cp kube-scheduler kube-apiserver kube-controller-manager kubectl /usr/local/bin/
复制执行文件到其他的master节点
scp /usr/local/bin/kube* 10.0.0.71:/usr/local/bin
scp /usr/local/bin/kube* 10.0.0.72:/usr/local/bin
配置Kubernetes证书
Kubernetes各个组件之间通信需要证书,需要复制到每个master节点(master1)
master1
mkdir -p /etc/kubernetes/cfg,ssl
cp /root/kubernetes/*.pem /etc/kubernetes/ssl/
master2
mkdir -p /etc/kubernetes/cfg,ssl
master3
mkdir -p /etc/kubernetes/cfg,ssl
复制到其他的节点
scp /etc/kubernetes/ssl/* 10.0.0.71:/etc/kubernetes/ssl
scp /etc/kubernetes/ssl/* 10.0.0.72:/etc/kubernetes/ssl
创建 TLS Bootstrapping Token(这里记录是告诉其作用,实际操作是下面的一步)
TLS bootstrapping 功能就是让 kubelet 先使用一个预定的低权限用户连接到 apiserver，然后向 apiserver 申请证书，kubelet 的证书由 apiserver 动态签署
Token可以是任意的包含128 bit的字符串，可以使用安全的随机数发生器生成
head -c 16 /dev/urandom | od -An -t x | tr -d \' \'
编辑Token 文件(所有master)
f89a76f197526a0d4bc2bf9c86e871c3:随机字符串,自定义生成; kubelet-bootstrap:用户名; 10001:UID; system:kubelet-bootstrap：用户组
cat > /etc/kubernetes/cfg/token.csv << EOF
f89a76f197526a0d4bc2bf9c86e871c3,kubelet-bootstrap,10001,"system:kubelet-bootstrap"
EOF
创建Apiserver配置文件(所有的master节点)
配置文件内容基本相同, 如果有多个节点, 那么需要修改IP地址即可
cat >/etc/kubernetes/cfg/kube-apiserver.cfg <<EOF
KUBE_APISERVER_OPTS="--logtostderr=true \\
--v=4 \\
--insecure-bind-address=0.0.0.0 \\
--insecure-port=8080 \\
--etcd-servers=https://10.0.0.70:2379,https://10.0.0.71:2379,https://10.0.0.72:2379 \\
--bind-address=0.0.0.0 \\
--secure-port=6443 \\
--advertise-address=0.0.0.0 \\
--allow-privileged=true \\
--service-cluster-ip-range=192.168.0.0/24 \\
--enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,ResourceQuota,NodeRestriction \\
--authorization-mode=RBAC,Node \\
--enable-bootstrap-token-auth \\
--token-auth-file=/etc/kubernetes/cfg/token.csv \\
--service-node-port-range=30000-50000 \\
--tls-cert-file=/etc/kubernetes/ssl/server.pem \\
--tls-private-key-file=/etc/kubernetes/ssl/server-key.pem \\
--client-ca-file=/etc/kubernetes/ssl/ca.pem \\
--service-account-key-file=/etc/kubernetes/ssl/ca-key.pem \\
--etcd-cafile=/etc/etcd/ssl/ca.pem \\
--etcd-certfile=/etc/etcd/ssl/server.pem \\
--etcd-keyfile=/etc/etcd/ssl/server-key.pem"
EOF
#参数说明
--logtostderr 启用日志
---v4 日志等级
--etcd-servers etcd 集群地址
--etcd-servers=https://192.168.91.200:2379,https://192.168.91.201:2379,https://192.168.91.202:2379
--bind-address 监听地址
--service-cluster-ip-range=192.168.0.0/24 这个地址段要和前面etcd签发证书的时候的网段是一样的(本次实验用的是192.168.0.0网段)
--secure-port https 安全端口
--advertise-address 集群通告地址
--allow-privileged 启用授权
--service-cluster-ip-range Service 虚拟IP地址段
--enable-admission-plugins 准入控制模块
--authorization-mode 认证授权,启用RBAC授权
--enable-bootstrap-token-auth 启用TLS bootstrap功能
--token-auth-file token 文件
--service-node-port-range Service Node类型默认分配端口范围
配置kube-apiserver 启动文件(所有的master节点)
cat >/usr/lib/systemd/system/kube-apiserver.service<<EOF
[Unit]
Description=Kubernetes API Server
Documentation=https://github.com/kubernetes/kubernetes
[Service]
EnvironmentFile=/etc/kubernetes/cfg/kube-apiserver.cfg
ExecStart=/usr/local/bin/kube-apiserver \\$KUBE_APISERVER_OPTS
Restart=on-failure
[Install]
WantedBy=multi-user.target
EOF
启动kube-apiserver服务(所有master)
systemctl daemon-reload
systemctl start kube-apiserver.service
systemctl enable kube-apiserver.service
检查
查看加密的端口是否已经启动
[root@master1 ssl]# netstat -anltup | grep 6443
tcp6 0 0 :::6443 :::* LISTEN 49473/kube-apiserve
tcp6 0 0 ::1:43658 ::1:6443 ESTABLISHED 49473/kube-apiserve
tcp6 0 0 ::1:6443 ::1:43658 ESTABLISHED 49473/kube-apiserve
查看加密的端口是否已经启动(node节点)
[root@node1 ~]# telnet 10.0.0.70 6443
Trying 10.0.0.70...
Connected to 10.0.0.70.
Escape character is \'^]\'.
第16个里程: 部署kube-scheduler 服务
创建kube-scheduler配置文件(所有的master节点)
cat >/etc/kubernetes/cfg/kube-scheduler.cfg<<EOF
KUBE_SCHEDULER_OPTS="--logtostderr=true --v=4 --bind-address=0.0.0.0 --master=127.0.0.1:8080 --leader-elect"
EOF
创建kube-scheduler 启动文件(所有master)
cat >/usr/lib/systemd/system/kube-scheduler.service<<EOF
[Unit]
Description=Kubernetes Scheduler
Documentation=https://github.com/kubernetes/kubernetes
[Service]
EnvironmentFile=/etc/kubernetes/cfg/kube-scheduler.cfg
ExecStart=/usr/local/bin/kube-scheduler \\$KUBE_SCHEDULER_OPTS
Restart=on-failure
[Install]
WantedBy=multi-user.target
EOF
启动kube-scheduler服务(所有的master节点)
systemctl daemon-reload
systemctl start kube-scheduler.service
systemctl enable kube-scheduler.service
查看Master节点组件状态(任意一台master)
[root@master3 ssl]# kubectl get cs
NAME STATUS MESSAGE ERROR
#这里是因为这个服务还没有安装
controller-manager Unhealthy Get http://127.0.0.1:10252/healthz: dial tcp 127.0.0.1:10252: connect: connection refused
scheduler Healthy ok
etcd-2 Healthy "health":"true"
etcd-1 Healthy "health":"true"
etcd-0 Healthy "health":"true"
第17个里程: 部署kube-controller-manager
创建kube-controller-manager配置文件(所有master节点)
cat >/etc/kubernetes/cfg/kube-controller-manager.cfg<<EOF
KUBE_CONTROLLER_MANAGER_OPTS="--logtostderr=true \\
--v=4 \\
--master=127.0.0.1:8080 \\
--leader-elect=true \\
--address=0.0.0.0 \\
--service-cluster-ip-range=192.168.0.0/24 \\
--cluster-name=kubernetes \\
--cluster-signing-cert-file=/etc/kubernetes/ssl/ca.pem \\
--cluster-signing-key-file=/etc/kubernetes/ssl/ca-key.pem \\
--root-ca-file=/etc/kubernetes/ssl/ca.pem \\
--service-account-private-key-file=/etc/kubernetes/ssl/ca-key.pem"
EOF
参数说明
--master=127.0.0.1:8080 #指定Master地址
--leader-elect #竞争选举机制产生一个 leader 节点，其它节点为阻塞状态。
--service-cluster-ip-range=192.168.0.0/24 这个地址段要和前面etcd签发证书的时候的网段是一样的(本次实验用的是192.168.0.0网段)
--service-cluster-ip-range #kubernetes service 指定的IP地址范围。
创建kube-controller-manager 启动文件(所有master节点)
cat >/usr/lib/systemd/system/kube-controller-manager.service<<EOF
[Unit]
Description=Kubernetes Controller Manager
Documentation=https://github.com/kubernetes/kubernetes
[Service]
EnvironmentFile=/etc/kubernetes/cfg/kube-controller-manager.cfg
ExecStart=/usr/local/bin/kube-controller-manager \\$KUBE_CONTROLLER_MANAGER_OPTS
Restart=on-failure
[Install]
WantedBy=multi-user.target
EOF
启动kube-controller-manager服务(所有master节点)
systemctl daemon-reload
systemctl start kube-controller-manager.service
systemctl enable kube-controller-manager.service
systemctl status kube-controller-manager.service
查看Master 节点组件状态
必须要在各个节点组件正常的情况下, 才去部署Node节点组件
[root@master1 ssl]# kubectl get cs
NAME STATUS MESSAGE ERROR
scheduler Healthy ok
controller-manager Healthy ok
etcd-1 Healthy "health":"true"
etcd-2 Healthy "health":"true"
etcd-0 Healthy "health":"true"
第18个里程: 部署Node节点组件
部署 kubelet 组件
从Master节点复制kubelet和kube-proxy 执行文件到Node
拷贝到node1
scp /soft/kubernetes/server/bin/kubelet 10.0.0.73:/usr/local/bin/
scp /soft/kubernetes/server/bin/kube-proxy 10.0.0.73:/usr/local/bin/
拷贝到node2
scp /soft/kubernetes/server/bin/kubelet 10.0.0.74:/usr/local/bin/
scp /soft/kubernetes/server/bin/kube-proxy 10.0.0.74:/usr/local/bin/
创建kubelet bootstrap.kubeconfig 文件
Maste1节点
mkdir /root/config ; cd /root/config
cat >/root/config/environment.sh<<EOF
# 创建kubelet bootstrapping kubeconfig
BOOTSTRAP_TOKEN=f89a76f197526a0d4bc2bf9c86e871c3
# 这里监听的是vip地址
KUBE_APISERVER="https://10.0.0.80:6443"
# 设置集群参数
kubectl config set-cluster kubernetes \\
--certificate-authority=/etc/kubernetes/ssl/ca.pem \\
--embed-certs=true \\
--server=\\$KUBE_APISERVER \\
--kubeconfig=bootstrap.kubeconfig
# 设置客户端认证参数
kubectl config set-credentials kubelet-bootstrap \\
--token=\\$BOOTSTRAP_TOKEN \\
--kubeconfig=bootstrap.kubeconfig
# 设置上下文参数
kubectl config set-context default \\
--cluster=kubernetes \\
--user=kubelet-bootstrap \\
--kubeconfig=bootstrap.kubeconfig
# 设置默认上下文
kubectl config use-context default --kubeconfig=bootstrap.kubeconfig
#通过 bash environment.sh获取 bootstrap.kubeconfig 配置文件。
EOF
执行脚本
[root@master1 config]# pwd
/root/config
sh /root/config/environment.sh
创建kube-proxy kubeconfig文件(master-1)
cat >/root/config/env_proxy.sh<<EOF
# 创建kube-proxy kubeconfig文件
BOOTSTRAP_TOKEN=f89a76f197526a0d4bc2bf9c86e871c3
# 这里换成VIP地址
KUBE_APISERVER="https://10.0.0.80:6443"
kubectl config set-cluster kubernetes \\
--certificate-authority=/etc/kubernetes/ssl/ca.pem \\
--embed-certs=true \\
--server=\\$KUBE_APISERVER \\
--kubeconfig=kube-proxy.kubeconfig
kubectl config set-credentials kube-proxy \\
--client-certificate=/etc/kubernetes/ssl/kube-proxy.pem \\
--client-key=/etc/kubernetes/ssl/kube-proxy-key.pem \\
--embed-certs=true \\
--kubeconfig=kube-proxy.kubeconfig
kubectl config set-context default \\
--cluster=kubernetes \\
--user=kube-proxy \\
--kubeconfig=kube-proxy.kubeconfig
kubectl config use-context default --kubeconfig=kube-proxy.kubeconfig
EOF
执行脚本
[root@master1 config]# pwd
/root/config
sh /root/config/env_proxy.sh
复制kubeconfig文件与证书到所有Node节点
将bootstrap kubeconfig kube-proxy.kubeconfig 文件复制到所有Node节点
先在node节点上创建目录
mkdir -p /etc/kubernetes/cfg,ssl
复制证书文件ssl(master1)
scp /etc/kubernetes/ssl/* 10.0.0.73:/etc/kubernetes/ssl/
scp /etc/kubernetes/ssl/* 10.0.0.74:/etc/kubernetes/ssl/
复制kubeconfig文件(master1)
拷贝到node1
scp /root/config/bootstrap.kubeconfig 10.0.0.73:/etc/kubernetes/cfg
scp /root/config/kube-proxy.kubeconfig 10.0.0.73:/etc/kubernetes/cfg
拷贝到node2
scp /root/config/bootstrap.kubeconfig 10.0.0.74:/etc/kubernetes/cfg
scp /root/config/kube-proxy.kubeconfig 10.0.0.74:/etc/kubernetes/cfg
创建kubelet参数配置文件
不同的Node节点, 需要修改IP地址 （node节点操作）
cat >/etc/kubernetes/cfg/kubelet.config<<EOF
kind: KubeletConfiguration
apiVersion: kubelet.config.k8s.io/v1beta1
address: 10.0.0.73
port: 10250
readOnlyPort: 10255
cgroupDriver: cgroupfs
clusterDNS: ["192.168.0.2"]
clusterDomain: cluster.local.
failSwapOn: false
authentication:
anonymous:
enabled: true
EOF
cat >/etc/kubernetes/cfg/kubelet.config<<EOF
kind: KubeletConfiguration
apiVersion: kubelet.config.k8s.io/v1beta1
address: 10.0.0.74
port: 10250
readOnlyPort: 10255
cgroupDriver: cgroupfs
clusterDNS: ["192.168.0.2"]
clusterDomain: cluster.local.
failSwapOn: false
authentication:
anonymous:
enabled: true
EOF
创建kubelet配置文件
不同的Node节点, 需要修改IP地址
cat >/etc/kubernetes/cfg/kubelet<<EOF
KUBELET_OPTS="--logtostderr=true \\
--v=4 \\
--hostname-override=10.0.0.73 \\
--kubeconfig=/etc/kubernetes/cfg/kubelet.kubeconfig \\
--bootstrap-kubeconfig=/etc/kubernetes/cfg/bootstrap.kubeconfig \\
--config=/etc/kubernetes/cfg/kubelet.config \\
--cert-dir=/etc/kubernetes/ssl \\
--pod-infra-container-image=docker.io/kubernetes/pause:latest"
EOF
cat >/etc/kubernetes/cfg/kubelet<<EOF
KUBELET_OPTS="--logtostderr=true \\
--v=4 \\
--hostname-override=10.0.0.74 \\
--kubeconfig=/etc/kubernetes/cfg/kubelet.kubeconfig \\
--bootstrap-kubeconfig=/etc/kubernetes/cfg/bootstrap.kubeconfig \\
--config=/etc/kubernetes/cfg/kubelet.config \\
--cert-dir=/etc/kubernetes/ssl \\
--pod-infra-container-image=docker.io/kubernetes/pause:latest"
EOF
创建kubelet系统启动文件(所有node节点)
cat >/usr/lib/systemd/system/kubelet.service<<EOF
[Unit]
Description=Kubernetes Kubelet
After=docker.service
Requires=docker.service
[Service]
EnvironmentFile=/etc/kubernetes/cfg/kubelet
ExecStart=/usr/local/bin/kubelet \\$KUBELET_OPTS
Restart=on-failure
KillMode=process
[Install]
WantedBy=multi-user.target
EOF
将kubelet-bootstrap用户绑定到系统集群角色
master1节点操作
kubectl create clusterrolebinding kubelet-bootstrap --clusterrole=system:node-bootstrapper --user=kubelet-bootstrap
启动kubelet服务(所有node节点)
systemctl daemon-reload
systemctl start kubelet.service
systemctl enable kubelet.service
systemctl status kubelet.service
服务端批准与查看CSR请求
Maste1节点操作
[root@master1 ~]# kubectl get csr
NAME AGE REQUESTOR CONDITION
node-csr-I81WpTLkI1GcJL1RN_7AsH2gDtqkRuIGb9Cvkzktg00 23s kubelet-bootstrap Pending
node-csr-vaqrhpHnGVhoa6lFp3ADkZxKtcZLYFEbuXbJ1r9AtrM 13s kubelet-bootstrap Pending
批准请求
Master节点操作
kubectl certificate approve node-csr-I81WpTLkI1GcJL1RN_7AsH2gDtqkRuIGb9Cvkzktg00
kubectl certificate approve node-csr-vaqrhpHnGVhoa6lFp3ADkZxKtcZLYFEbuXbJ1r9AtrM
查看节点状态
[root@master1 ~]# kubectl get nodes
NAME STATUS ROLES AGE VERSION
10.0.0.73 Ready <none> 5s v1.15.1
10.0.0.74 Ready <none> 32m v1.15.1
部署kube-proxy 组件
kube-proxy 运行在所有Node节点上, 监听Apiserver 中 Service 和 Endpoint 的变化情况，创建路由规则来进行服务负载均衡
创建kube-proxy配置文件
注意修改hostname-override地址, 不同的节点则不同
cat >/etc/kubernetes/cfg/kube-proxy<<EOF
KUBE_PROXY_OPTS="--logtostderr=true \\
--v=4 \\
--metrics-bind-address=0.0.0.0 \\
--hostname-override=10.0.0.73 \\
--cluster-cidr=192.168.0.0/24 \\
--kubeconfig=/etc/kubernetes/cfg/kube-proxy.kubeconfig"
EOF
参数说明:
--hostname-override=10.0.0.73 节点的ip地址
--cluster-cidr=192.168.0.0/24 这里用的网段也是给etcd证书签发的时候用到的网段
cat >/etc/kubernetes/cfg/kube-proxy<<EOF
KUBE_PROXY_OPTS="--logtostderr=true \\
--v=4 \\
--metrics-bind-address=0.0.0.0 \\
--hostname-override=10.0.0.74 \\
--cluster-cidr=192.168.0.0/24 \\
--kubeconfig=/etc/kubernetes/cfg/kube-proxy.kubeconfig"
EOF
创建kube-proxy systemd unit 文件(所有node节点)
cat >/usr/lib/systemd/system/kube-proxy.service<<EOF
[Unit]
Description=Kubernetes Proxy
After=network.target
[Service]
EnvironmentFile=/etc/kubernetes/cfg/kube-proxy
ExecStart=/usr/local/bin/kube-proxy \\$KUBE_PROXY_OPTS
Restart=on-failure
[Install]
WantedBy=multi-user.target
EOF
启动kube-proxy 服务
systemctl daemon-reload
systemctl start kube-proxy.service
systemctl enable kube-proxy.service
systemctl status kube-proxy.service
运行Demo项目检测(任意master执行即可)
[root@master1 ~]# kubectl run nginx --image=nginx --replicas=2
kubectl run --generator=deployment/apps.v1 is DEPRECATED and will be removed in a future version. Use kubectl run --generator=run-pod/v1 or kubectl create instead.
deployment.apps/nginx created
[root@master1 ~]# kubectl get pods -A
NAMESPACE NAME READY STATUS RESTARTS AGE
default nginx-7bb7cd8db5-8b5gs 0/1 ContainerCreating 0 7s
default nginx-7bb7cd8db5-dzc5q 0/1 ContainerCreating 0 7s
#获取容器IP与运行节点
[root@master1 ~]# kubectl get pods -o wide
NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE READINESS GATES
nginx-7bb7cd8db5-8b5gs 1/1 Running 0 56s 172.17.1.2 10.0.0.74 <none> <none>
nginx-7bb7cd8db5-dzc5q 1/1 Running 0 56s 172.17.46.2 10.0.0.73 <none> <none>
#创建容器svc端口
[root@master1 ~]# kubectl expose deployment nginx --port=88 --target-port=80 --type=NodePort
# 查看SVC
[root@master1 ~]# kubectl get svc
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
kubernetes ClusterIP 192.168.0.1 <none> 443/TCP 125m
nginx NodePort 192.168.0.147 <none> 88:39073/TCP 11s
# 访问node节点上的pod
[root@master1 ~]# curl http://10.0.0.73:39073
[root@master1 ~]# curl http://10.0.0.74:39073
删除demon项目
kubectl delete deployment nginx
kubectl delete pods nginx
kubectl delete svc -l run=nginx
第19个里程: 部署DNS
把镜像先传到node节点,然后倒入镜像
docker load -i coredns1.0.6.tar
master1上应用yml文件
kubectl apply -f coredns-1.0.6.yml
第20个里程: 部署dashboard
部署
下载yml文件以后，修改一下如下地方
访问的时候前面地址加上https：节点ip:50000
创建用户授权
master上执行(任意一个master节点)
kubectl create serviceaccount dashboard-admin -n kube-system
kubectl create clusterrolebinding dashboard-admin --clusterrole=cluster-admin --serviceaccount=kube-system:dashboard-admin
获取Token
kubectl describe secrets -n kube-system $(kubectl -n kube-system get secret | awk \'/dashboard-admin/print $1\')
第21个里程: 部署Traefik 2.0
创建 traefik-crd.yaml
crd资源不区分命名空间
mkdir /root/ingress && cd /root/ingress
[root@master1 ingress]# cat traefik-crd.yaml
apiVersion: apiextensions.k8s.io/v1beta1
kind: CustomResourceDefinition
metadata:
name: ingressroutes.traefik.containo.us
spec:
scope: Namespaced
group: traefik.containo.us
version: v1alpha1
names:
kind: IngressRoute
plural: ingressroutes
singular: ingressroute
---
apiVersion: apiextensions.k8s.io/v1beta1
kind: CustomResourceDefinition
metadata:
name: ingressroutetcps.traefik.containo.us
spec:
scope: Namespaced
group: traefik.containo.us
version: v1alpha1
names:
kind: IngressRouteTCP
plural: ingressroutetcps
singular: ingressroutetcp
---
apiVersion: apiextensions.k8s.io/v1beta1
kind: CustomResourceDefinition
metadata:
name: middlewares.traefik.containo.us
spec:
scope: Namespaced
group: traefik.containo.us
version: v1alpha1
names:
kind: Middleware
plural: middlewares
singular: middleware
---
apiVersion: apiextensions.k8s.io/v1beta1
kind: CustomResourceDefinition
metadata:
name: tlsoptions.traefik.containo.us
spec:
scope: Namespaced
group: traefik.containo.us
version: v1alpha1
names:
kind: TLSOption
plural: tlsoptions
singular: tlsoption
创建
kubectl apply -f traefik-crd.yaml
检查
[root@master1 ingress]# kubectl get crd
NAME CREATED AT
ingressroutes.traefik.containo.us 2023-03-11T01:29:34Z
ingressroutetcps.traefik.containo.us 2023-03-11T01:29:34Z
middlewares.traefik.containo.us 2023-03-11T01:29:34Z
tlsoptions.traefik.containo.us 2023-03-11T01:29:34Z
创建Traefik RBAC文件
rbac区分命名空间
[root@master1 ingress]# cat traefik-rbac.yaml
apiVersion: v1
kind: ServiceAccount
metadata:
namespace: kube-system
name: traefik-ingress-controller
---
kind: ClusterRole
apiVersion: rbac.authorization.k8s.io/v1beta1
metadata:
name: traefik-ingress-controller
rules:
- apiGroups: [""]
resources: ["services","endpoints","secrets"]
verbs: ["get","list","watch"]
- apiGroups: ["extensions"]
resources: ["ingresses"]
verbs: ["get","list","watch"]
- apiGroups: ["extensions"]
resources: ["ingresses/status"]
verbs: ["update"]
- apiGroups: ["traefik.containo.us"]
resources: ["middlewares"]
verbs: ["get","list","watch"]
- apiGroups: ["traefik.containo.us"]
resources: ["ingressroutes"]
verbs: ["get","list","watch"]
- apiGroups: ["traefik.containo.us"]
resources: ["ingressroutetcps"]
verbs: ["get","list","watch"]
- apiGroups: ["traefik.containo.us"]
resources: ["tlsoptions"]
verbs: ["get","list","watch"]
---
kind: ClusterRoleBinding
apiVersion: rbac.authorization.k8s.io/v1beta1
metadata:
name: traefik-ingress-controller
roleRef:
apiGroup: rbac.authorization.k8s.io
kind: ClusterRole
name: traefik-ingress-controller
subjects:
- kind: ServiceAccount
name: traefik-ingress-controller
namespace: kube-system
kubectl apply -f traefik-rbac.yaml
创建Traefik ConfigMap
[root@master1 ingress]# cat traefik-config.yaml
kind: ConfigMap
apiVersion: v1
metadata:
name: traefik-config
namespace: kube-system
data:
traefik.yaml: |-
serversTransport:
insecureSkipVerify: true
api:
insecure: true
dashboard: true
debug: true
metrics:
prometheus: ""
entryPoints:
web:
address: ":80"
websecure:
address: ":443"
providers:
kubernetesCRD: ""
log:
filePath: ""
level: error
format: json
accessLog:
filePath: ""
format: json
bufferingSize: 0
filters:
retryAttempts: true
minDuration: 20
fields:
defaultMode: keep
names:
ClientUsername: drop
headers:
defaultMode: keep
names:
User-Agent: redact
Authorization: drop
Content-Type: keep
创建
kubectl apply -f traefik-config.yaml
检查
[root@master1 ingress]# kubectl get configmap -n kube-system
NAME DATA AGE
coredns 1 14h
extension-apiserver-authentication 1 15h
kubernetes-dashboard-settings 1 13h
traefik-config 1 4s
节点设置label标签
由于是 Kubernetes DeamonSet 这种方式部署 Traefik，所以需要提前给节点设置 Label，这样当程序部署时 Pod 会自动调度到设置 Label 的节点上
kubectl label nodes 192.168.3.203 IngressProxy=true
查看标签是否成功
[root@master1 ingress]# kubectl get nodes --show-labels
NAME STATUS ROLES AGE VERSION LABELS
192.168.3.203 Ready <none> 13h v1.15.1 IngressProxy=true,beta.kubernetes.io/arch=amd64,beta.kubernetes.io/os=linux,kubernetes.io/arch=amd64,kubernetes.io/hostname=192.168.3.203,kubernetes.io/os=linux
192.168.3.204 Ready <none> 13h v1.15.1 beta.kubernetes.io/arch=amd64,beta.kubernetes.io/os=linux,kubernetes.io/arch=amd64,kubernetes.io/hostname=192.168.3.204,kubernetes.io/os=linux
注意每个Node节点的80与443端口不能被占用
netstat -antupl | grep -E "80|443"
创建 traefik 部署文件
上面打了节点标签，它只会到到指定的节点上面，即使是用的daemonset
[root@master1 ingress]# cat traefik-deploy.yaml
apiVersion: v1
kind: Service
metadata:
name: traefik
namespace: kube-system
spec:
ports:
- name: web
port: 80
- name: websecure
port: 443
- name: admin
port: 8080
selector:
app: traefik
---
apiVersion: apps/v1
kind: DaemonSet
metadata:
name: traefik-ingress-controller
namespace: kube-system
labels:
app: traefik
spec:
selector:
matchLabels:
app: traefik
template:
metadata:
name: traefik
labels:
app: traefik
spec:
serviceAccountName: traefik-ingress-controller
terminationGracePeriodSeconds: 1
containers:
- image: traefik:2.0.5
name: traefik-ingress-lb
ports:
- name: web
containerPort: 80
hostPort: 80
- name: websecure
containerPort: 443
hostPort: 443
- name: admin
containerPort: 8080
resources:
limits:
cpu: 2000m
memory: 1024Mi
requests:
cpu: 1000m
memory: 1024Mi
securityContext:
capabilities:
drop:
- ALL
add:
- NET_BIND_SERVICE
args:
- --configfile=/config/traefik.yaml
volumeMounts:
- mountPath: "/config"
name: "config"
volumes:
- name: config
configMap:
name: traefik-config
tolerations:
- operator: "Exists"
nodeSelector:
IngressProxy: "true"
创建
kubectl apply -f traefik-deploy.yaml
查看运行状态
[root@master1 ingress]# kubectl get DaemonSet -A
NAMESPACE NAME DESIRED CURRENT READY UP-TO-DATE AVAILABLE NODE SELECTOR AGE
kube-system traefik-ingress-controller 1 1 0 1 0 IngressProxy=true 18s
Traefik 路由配置
vim traefik-dashboard-route.yaml
apiVersion: traefik.containo.us/v1alpha1
kind: IngressRoute
metadata:
name: traefik-dashboard-route
namespace: kube-system
spec:
entryPoints:
- web
routes:
- match: Host(`ingress.abcd.com`)
kind: Rule
services:
- name: traefik
port: 8080
创建
kubectl apply -f traefik-dashboard-route.yaml
检查
[root@master1 ingress]# kubectl get ingressroute.traefik.containo.us -A
NAMESPACE NAME AGE
kube-system traefik-dashboard-route 78s
客户端访问Traefik Dashboard
绑定物理主机Hosts文件或者域名解析
/etc/hosts
192.168.3.203 ingress.abcd.com
访问web
CentOS 8 二进制 高可用 安装 k8s 1.16.x
- 基本说明
本文章将演示CentOS 8二进制方式安装高可用k8s 1.16.x，相对于其他版本，二进制安装方式并无太大区别。CentOS 8相对于CentOS 7操作更加方便，比如一些服务的关闭，无需修改配置文件即可永久生效，CentOS 8默认安装的内核版本是4.18，所以在安装k8s的过程中也无需在进行内核升级，系统环境也可按需升级，如果下载的是最新版的CentOS 8，系统升级也可省略。
- 基本环境配置
主机信息
192.168.1.19 k8s-master01
192.168.1.18 k8s-master02
192.168.1.20 k8s-master03
192.168.1.88 k8s-master-lb
192.168.1.21 k8s-node01
192.168.1.22 k8s-node02
系统环境
[root@k8s-master01 ~]# cat /etc/redhat-release
CentOS Linux release 8.0.1905 (Core)
[root@k8s-master01 ~]# uname -a
Linux k8s-master01 4.18.0-80.el8.x86_64 #1 SMP Tue Jun 4 09:19:46 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux
配置所有节点hosts文件
[root@k8s-master01 ~]# cat /etc/hosts
127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4
::1 localhost localhost.localdomain localhost6 localhost6.localdomain6
192.168.1.19 k8s-master01
192.168.1.18 k8s-master02
192.168.1.20 k8s-master03
192.168.1.88 k8s-master-lb
192.168.1.21 k8s-node01
192.168.1.22 k8s-node02
所有节点关闭firewalld 、dnsmasq、NetworkManager、selinux
systemctl disable --now firewalld
systemctl disable --now dnsmasq
setenforce 0
所有节点关闭swap分区
[root@k8s-master01 ~]# swapoff -a && sysctl -w vm.swappiness=0
vm.swappiness = 0
所有节点同步时间
ln -sf /usr/share/zoneinfo/Asia/Shanghai /etc/localtime
echo ‘Asia/Shanghai‘ >/etc/timezone
ntpdate time2.aliyun.com
Master01节点生成ssh key
[root@k8s-master01 ~]# ssh-keygen -t rsa
Generating public/private rsa key pair.
Enter file in which to save the key (/root/.ssh/id_rsa):
Created directory ‘/root/.ssh‘.
Enter passphrase (empty for no passphrase):
Enter same passphrase again:
Your identification has been saved in /root/.ssh/id_rsa.
Your public key has been saved in /root/.ssh/id_rsa.pub.
The key fingerprint is:
SHA256:6uz2kI+jcMJIUQWKqRcDRbvpVxhCW3Tmqn0NKS+lT3U root@k8s-master01
The key‘s randomart image is:
+---[RSA 2048]----+
|.o++=.o |
|.+o+ + |
|oo* . . |
|. .* + . |
|..+ + = S E |
|.= o * * . |
|. * * B . |
| = Bo+ |
| .+*oo |
+----[SHA256]-----+
Master01配置免密码登录其他节点
[root@k8s-master01 ~]# for i in k8s-master01 k8s-master02 k8s-master03 k8s-node01 k8s-node02;do ssh-copy-id -i .ssh/id_rsa.pub $i;done
所有节点安装基本工具
yum install wget jq psmisc vim net-tools yum-utils device-mapper-persistent-data lvm2 git -y
Master01下载安装文件
[root@k8s-master01 ~]# git clone https://github.com/dotbalo/k8s-ha-install.git
Cloning into ‘k8s-ha-install‘...
remote: Enumerating objects: 12, done.
remote: Counting objects: 100% (12/12), done.
remote: Compressing objects: 100% (11/11), done.
remote: Total 461 (delta 2), reused 5 (delta 1), pack-reused 449
Receiving objects: 100% (461/461), 19.52 MiB | 4.04 MiB/s, done.
Resolving deltas: 100% (163/163), done.
切换到1.16.x分支
git checkout manual-installation-v1.16.x
-
基本组件安装
配置Docker yum源
[root@k8s-master01 k8s-ha-install]# curl https://download.docker.com/linux/centos/docker-ce.repo -o /etc/yum.repos.d/docker-ce.repo
% Total % Received % Xferd Average Speed Time Time Time Current
Dload Upload Total Spent Left Speed
100 2424 100 2424 0 0 3639 0 --:--:-- --:--:-- --:--:-- 3645
[root@k8s-master01 k8s-ha-install]# yum makecache
CentOS-8 - AppStream 559 kB/s | 6.3 MB 00:11
CentOS-8 - Base 454 kB/s | 7.9 MB 00:17
CentOS-8 - Extras 592 B/s | 2.1 kB 00:03
Docker CE Stable - x86_64 5.8 kB/s | 20 kB 00:03
Last metadata expiration check: 0:00:01 ago on Sat 02 Nov 2019 02:46:29 PM CST.
Metadata cache created.
所有节点安装新版containerd
[root@k8s-master01 k8s-ha-install]# wget https://download.docker.com/linux/centos/7/x86_64/edge/Packages/containerd.io-1.2.6-3.3.el7.x86_64.rpm
--2019-11-02 15:00:20-- https://download.docker.com/linux/centos/7/x86_64/edge/Packages/containerd.io-1.2.6-3.3.el7.x86_64.rpm
Resolving download.docker.com (download.docker.com)... 13.225.103.32, 13.225.103.65, 13.225.103.10, ...
Connecting to download.docker.com (download.docker.com)|13.225.103.32|:443... connected.
HTTP request sent, awaiting response... 200 OK
Length: 27119348 (26M) [binary/octet-stream]
Saving to: ‘containerd.io-1.2.6-3.3.el7.x86_64.rpm’
containerd.io-1.2.6-3.3.el7.x86_64.rpm 100%[===================================================================================================================>] 25.86M 1.55MB/s in 30s
2019-11-02 15:00:51 (887 KB/s) - ‘containerd.io-1.2.6-3.3.el7.x86_64.rpm’ saved [27119348/27119348]
[root@k8s-master01 k8s-ha-install]# yum -y install containerd.io-1.2.6-3.3.el7.x86_64.rpm
Last metadata expiration check: 0:14:35 ago on Sat 02 Nov 2019 02:46:29 PM CST.
所有节点安装最新版Docker
[root@k8s-master01 k8s-ha-install]# yum install docker-ce -y
所有节点开启Docker并设置开机自启动
[root@k8s-master01 k8s-ha-install]# systemctl enable --now docker
Created symlink /etc/systemd/system/multi-user.target.wants/docker.service → /usr/lib/systemd/system/docker.service.
[root@k8s-master01 k8s-ha-install]# docker version
Client: Docker Engine - Community
Version: 19.03.4
API version: 1.40
Go version: go1.12.10
Git commit: 9013bf583a
Built: Fri Oct 18 15:52:22 2019
OS/Arch: linux/amd64
Experimental: false
Server: Docker Engine - Community
Engine:
Version: 19.03.4
API version: 1.40 (minimum version 1.12)
Go version: go1.12.10
Git commit: 9013bf583a
Built: Fri Oct 18 15:50:54 2019
OS/Arch: linux/amd64
Experimental: false
containerd:
Version: 1.2.6
GitCommit: 894b81a4b802e4eb2a91d1ce216b8817763c29fb
runc:
Version: 1.0.0-rc8
GitCommit: 425e105d5a03fabd737a126ad93d62a9eeede87f
docker-init:
Version: 0.18.0
GitCommit: fec3683
4. k8s组件安装
下载kubernetes 1.16.x安装包
https://dl.k8s.io/v1.16.2/kubernetes-server-linux-amd64.tar.gz
下载etcd 3.3.15安装包
[root@k8s-master01 ~]# wget https://github.com/etcd-io/etcd/releases/download/v3.3.15/etcd-v3.3.15-linux-amd64.tar.gz
解压kubernetes安装文件
[root@k8s-master01 ~]# tar -xf kubernetes-server-linux-amd64.tar.gz --strip-components=3 -C /usr/local/bin kubernetes/server/bin/kube{let,ctl,-apiserver,-controller-manager,-scheduler,-proxy}
解压etcd安装文件
[root@k8s-master01 ~]# tar -zxvf etcd-v3.3.15-linux-amd64.tar.gz --strip-components=1 -C /usr/local/bin etcd-v3.3.15-linux-amd64/etcd{,ctl}
版本查看
[root@k8s-master01 ~]# etcd --version
etcd Version: 3.3.15
Git SHA: 94745a4ee
Go Version: go1.12.9
Go OS/Arch: linux/amd64
[root@k8s-master01 ~]# kubectl version
Client Version: version.Info{Major:"1", Minor:"16", GitVersion:"v1.16.2", GitCommit:"c97fe5036ef3df2967d086711e6c0c405941e14b", GitTreeState:"clean", BuildDate:"2019-10-15T19:18:23Z", GoVersion:"go1.12.10", Compiler:"gc", Platform:"linux/amd64"}
The connection to the server localhost:8080 was refused - did you specify the right host or port?
将组件发送到其他节点
MasterNodes=‘k8s-master02 k8s-master03‘
WorkNodes=‘k8s-node01 k8s-node02‘
for NODE in $MasterNodes; do echo $NODE; scp /usr/local/bin/kube{let,ctl,-apiserver,-controller-manager,-scheduler,-proxy} $NODE:/usr/local/bin/; scp /usr/local/bin/etcd* $NODE:/usr/local/bin/; done
for NODE in $WorkNodes; do scp /usr/local/bin/kube{let,-proxy} $NODE:/usr/local/bin/ ; done
CNI安装，下载CNI组件
wget https://github.com/containernetworking/plugins/releases/download/v0.7.5/cni-plugins-amd64-v0.7.5.tgz
所有节点创建/opt/cni/bin目录
mkdir -p /opt/cni/bin
解压cni并发送至其他节点
tar -zxf cni-plugins-amd64-v0.7.5.tgz -C /opt/cni/bin
for NODE in $MasterNodes; do ssh $NODE ‘mkdir -p /opt/cni/bin‘; scp /opt/cni/bin/ $NODE:/opt/cni/bin/; done
for NODE in $WorkNodes; do ssh $NODE ‘mkdir -p /opt/cni/bin‘; scp /opt/cni/bin/ $NODE:/opt/cni/bin/; done
5. 生成证书
下载生成证书工具
wget "https://pkg.cfssl.org/R1.2/cfssl_linux-amd64" -O /usr/local/bin/cfssl
wget "https://pkg.cfssl.org/R1.2/cfssljson_linux-amd64" -O /usr/local/bin/cfssljson
chmod +x /usr/local/bin/cfssl /usr/local/bin/cfssljson
所有Master节点创建etcd证书目录
mkdir /etc/etcd/ssl -p
Master01节点生成etcd证书
[root@k8s-master01 pki]# pwd
/root/k8s-ha-install/pki
[root@k8s-master01 pki]# cfssl gencert -initca etcd-ca-csr.json | cfssljson -bare /etc/etcd/ssl/etcd-ca
2019/11/02 20:39:26 [INFO] generating a new CA key and certificate from CSR
2019/11/02 20:39:26 [INFO] generate received request
2019/11/02 20:39:26 [INFO] received CSR
2019/11/02 20:39:26 [INFO] generating key: rsa-2048
2019/11/02 20:39:27 [INFO] encoded CSR
2019/11/02 20:39:27 [INFO] signed certificate with serial number 603981780847439086338945186785919518080443607000
[root@k8s-master01 pki]# cfssl gencert
-ca=/etc/etcd/ssl/etcd-ca.pem
-ca-key=/etc/etcd/ssl/etcd-ca-key.pem
-config=ca-config.json
-hostname=127.0.0.1,k8s-master01,k8s-master02,k8s-master03,192.168.1.19,192.168.1.18,192.168.1.20
json | cfssljson -bare /etc/etcd/ssl/etcd
-profile=kubernetes
etcd-csr.json | cfssljson -bare /etc/etcd/ssl/etcd
2019/11/02 20:48:51 [INFO] generate received request
2019/11/02 20:48:51 [INFO] received CSR
2019/11/02 20:48:51 [INFO] generating key: rsa-2048
2019/11/02 20:48:52 [INFO] encoded CSR
2019/11/02 20:48:52 [INFO] signed certificate with serial number 584188914871773268065873129590581350709445633441
将证书复制到其他节点
[root@k8s-master01 pki]# MasterNodes=‘k8s-master02 k8s-master03‘
[root@k8s-master01 pki]# WorkNodes=‘k8s-node01 k8s-node02‘
[root@k8s-master01 pki]#
[root@k8s-master01 pki]#
[root@k8s-master01 pki]#
[root@k8s-master01 pki]# for NODE in $MasterNodes; do
ssh $NODE "mkdir -p /etc/etcd/ssl" for FILE in etcd-ca-key.pem etcd-ca.pem etcd-key.pem etcd.pem; do scp /etc/etcd/ssl/${FILE} $NODE:/etc/etcd/ssl/${FILE} donedone
etcd-ca-key.pem 100% 1675 424.0KB/s 00:00
etcd-ca.pem 100% 1363 334.4KB/s 00:00
etcd-key.pem 100% 1679 457.4KB/s 00:00
etcd.pem 100% 1505 254.5KB/s 00:00
etcd-ca-key.pem 100% 1675 308.3KB/s 00:00
etcd-ca.pem 100% 1363 479.0KB/s 00:00
etcd-key.pem 100% 1679 208.1KB/s 00:00
etcd.pem 100% 1505 398.1KB/s 00:00
生成kubernetes证书
所有节点创建kubernetes相关目录
mkdir -p /etc/kubernetes/pki
[root@k8s-master01 pki]# cfssl gencert -initca ca-csr.json | cfssljson -bare /etc/kubernetes/pki/ca
2019/11/02 20:56:39 [INFO] generating a new CA key and certificate from CSR
2019/11/02 20:56:39 [INFO] generate received request
2019/11/02 20:56:39 [INFO] received CSR
2019/11/02 20:56:39 [INFO] generating key: rsa-2048
2019/11/02 20:56:39 [INFO] encoded CSR
2019/11/02 20:56:39 [INFO] signed certificate with serial number 204375274212114571715224985915861594178740016435
[root@k8s-master01 pki]# cfssl gencert -ca=/etc/kubernetes/pki/ca.pem -ca-key=/etc/kubernetes/pki/ca-key.pem -config=ca-config.json -hostname=10.96.0.1,192.168.1.88,127.0.0.1,kubernetes,kubernetes.default,kubernetes.default.svc,kubernetes.default.svc.cluster,kubernetes.default.svc.cluster.local,192.168.1.19,192.168.1.18,192.168.1.20 -profile=kubernetes apiserver-csr.json | cfssljson -bare /etc/kubernetes/pki/apiserver
2019/11/02 20:58:37 [INFO] generate received request
2019/11/02 20:58:37 [INFO] received CSR
2019/11/02 20:58:37 [INFO] generating key: rsa-2048
2019/11/02 20:58:37 [INFO] encoded CSR
2019/11/02 20:58:37 [INFO] signed certificate with serial number 530242414195398724956103410222477752498137496229
[root@k8s-master01 pki]# cfssl gencert -initca front-proxy-ca-csr.json | cfssljson -bare /etc/kubernetes/pki/front-proxy-ca
netes front-proxy-client-csr.json | cfssljson -bare /etc/kubernetes/pki/front-proxy-client
2019/11/02 20:59:28 [INFO] generating a new CA key and certificate from CSR
2019/11/02 20:59:28 [INFO] generate received request
2019/11/02 20:59:28 [INFO] received CSR
2019/11/02 20:59:28 [INFO] generating key: rsa-2048
2019/11/02 20:59:29 [INFO] encoded CSR
2019/11/02 20:59:29 [INFO] signed certificate with serial number 400365003875188640769336046625866020115935574187
[root@k8s-master01 pki]#
[root@k8s-master01 pki]# cfssl gencert -ca=/etc/kubernetes/pki/front-proxy-ca.pem -ca-key=/etc/kubernetes/pki/front-proxy-ca-key.pem -config=ca-config.json -profile=kubernetes front-proxy-client-csr.json | cfssljson -bare /etc/kubernetes/pki/front-proxy-client
2019/11/02 20:59:29 [INFO] generate received request
2019/11/02 20:59:29 [INFO] received CSR
2019/11/02 20:59:29 [INFO] generating key: rsa-2048
2019/11/02 20:59:31 [INFO] encoded CSR
2019/11/02 20:59:31 [INFO] signed certificate with serial number 714876805420065531759406103649716563367283489841
[root@k8s-master01 pki]# cfssl gencert
-ca=/etc/kubernetes/pki/ca.pem
-ca-key=/etc/kubernetes/pki/ca-key.pem
-config=ca-config.json
-profile=kubernetes
manager-csr.json | cfssljson -bare /etc/kubernetes/pki/controller-manager
2019/11/02 20:59:56 [INFO] generate received request
2019/11/02 20:59:56 [INFO] received CSR
2019/11/02 20:59:56 [INFO] generating key: rsa-2048
2019/11/02 20:59:56 [INFO] encoded CSR
2019/11/02 20:59:56 [INFO] signed certificate with serial number 365163931170718211641188236585237940196007847195
2019/11/02 20:59:56 [WARNING] This certificate lacks a "hosts" field. This makes it unsuitable for
websites. For more information see the Baseline Requirements for the Issuance and Management
of Publicly-Trusted Certificates, v.1.1.6, from the CA/Browser Forum (https://cabforum.org);
specifically, section 10.2.3 ("Information Requirements").
[root@k8s-master01 pki]#
[root@k8s-master01 pki]# kubectl config set-cluster kubernetes
--certificate-authority=/etc/kubernetes/pki/ca.pem --embed-certs=true --server=https://192.168.1.88:8443 --kubeconfig=/etc/kubernetes/controller-manager.kubeconfigig
kubectl config set-context system:kube-controller-manager@kubernetes
--cluster=kubernetes
--user=system:kube-controller-manager
--kubeconfig=/etc/kubernetes/controller-manager.kubeconfig
kubectl config use-context system:kube-controller-manager@kubernetes
--kubeconfig=/etc/kubernetes/controller-manager.kubeconfig
Cluster "kubernetes" set.
[root@k8s-master01 pki]#
[root@k8s-master01 pki]# kubectl config set-credentials system:kube-controller-manager
--client-certificate=/etc/kubernetes/pki/controller-manager.pem --client-key=/etc/kubernetes/pki/controller-manager-key.pem --embed-certs=true --kubeconfig=/etc/kubernetes/controller-manager.kubeconfigUser "system:kube-controller-manager" set.
[root@k8s-master01 pki]#
[root@k8s-master01 pki]# kubectl config set-context system:kube-controller-manager@kubernetes
--cluster=kubernetes
--user=system:kube-controller-manager
--kubeconfig=/etc/kubernetes/controller-manager.kubeconfig
Context "system:kube-controller-manager@kubernetes" created.
[root@k8s-master01 pki]#
[root@k8s-master01 pki]# kubectl config use-context system:kube-controller-manager@kubernetes
--kubeconfig=/etc/kubernetes/controller-manager.kubeconfig
Switched to context "system:kube-controller-manager@kubernetes".
[root@k8s-master01 pki]# cfssl gencert
-ca=/etc/kubernetes/pki/ca.pem
-ca-key=/etc/kubernetes/pki/ca-key.pem
-config=ca-config.json
-profile=kubernetes
scheduler-csr.json | cfssljson -bare /etc/kubernetes/pki/scheduler
2019/11/02 21:00:48 [INFO] generate received request
2019/11/02 21:00:48 [INFO] received CSR
2019/11/02 21:00:48 [INFO] generating key: rsa-2048
2019/11/02 21:00:49 [INFO] encoded CSR
2019/11/02 21:00:49 [INFO] signed certificate with serial number 536666325566380578973549296433116161533422391008
2019/11/02 21:00:49 [WARNING] This certificate lacks a "hosts" field. This makes it unsuitable for
websites. For more information see the Baseline Requirements for the Issuance and Management
of Publicly-Trusted Certificates, v.1.1.6, from the CA/Browser Forum (https://cabforum.org);
specifically, section 10.2.3 ("Information Requirements").
[root@k8s-master01 pki]# kubectl config set-cluster kubernetes
--certificate-authority=/etc/kubernetes/pki/ca.pem --embed-certs=true --server=https://192.168.1.88:8443 --kubeconfig=/etc/kubernetes/scheduler.kubeconfigheduler@kubernetes
--cluster=kubernetes
--user=system:kube-scheduler
--kubeconfig=/etc/kubernetes/scheduler.kubeconfig
kubectl config use-context system:kube-scheduler@kubernetes
--kubeconfig=/etc/kubernetes/scheduler.kubeconfig
Cluster "kubernetes" set.
[root@k8s-master01 pki]#
[root@k8s-master01 pki]# kubectl config set-credentials system:kube-scheduler
--client-certificate=/etc/kubernetes/pki/scheduler.pem --client-key=/etc/kubernetes/pki/scheduler-key.pem --embed-certs=true --kubeconfig=/etc/kubernetes/scheduler.kubeconfigUser "system:kube-scheduler" set.
[root@k8s-master01 pki]#
[root@k8s-master01 pki]# kubectl config set-context system:kube-scheduler@kubernetes
--cluster=kubernetes
--user=system:kube-scheduler
--kubeconfig=/etc/kubernetes/scheduler.kubeconfig
Context "system:kube-scheduler@kubernetes" created.
[root@k8s-master01 pki]#
[root@k8s-master01 pki]# kubectl config use-context system:kube-scheduler@kubernetes
--kubeconfig=/etc/kubernetes/scheduler.kubeconfig
Switched to context "system:kube-scheduler@kubernetes".
[root@k8s-master01 pki]# cfssl gencert
-ca=/etc/kubernetes/pki/ca.pem
-ca-key=/etc/kubernetes/pki/ca-key.pem
-config=ca-config.json
-profile=kubernetes
admin-csr.json | cfssljson -bare /etc/kubernetes/pki/admin
2019/11/02 21:01:56 [INFO] generate received request
2019/11/02 21:01:56 [INFO] received CSR
2019/11/02 21:01:56 [INFO] generating key: rsa-2048
2019/11/02 21:01:56 [INFO] encoded CSR
2019/11/02 21:01:56 [INFO] signed certificate with serial number 596648060489336426936623033491721470152303339581
2019/11/02 21:01:56 [WARNING] This certificate lacks a "hosts" field. This makes it unsuitable for
websites. For more information see the Baseline Requirements for the Issuance and Management
of Publicly-Trusted Certificates, v.1.1.6, from the CA/Browser Forum (https://cabforum.org);
specifically, section 10.2.3 ("Information Requirements").
[root@k8s-master01 pki]# kubectl config set-cluster kubernetes --certificate-authority=/etc/kubernetes/pki/ca.pem --embed-certs=true --server=https://192.168.1.88:8443 --kubeconfig=/etc/kubernetes/admin.kubeconfig
s --user=kubernetes-admin --kubeconfig=/etc/kubernetes/admin.kubeconfig
kubectl config use-context kubernetes-admin@kubernetes --kubeconfig=/etc/kubernetes/admin.kubeconfig
Cluster "kubernetes" set.
[root@k8s-master01 pki]#
[root@k8s-master01 pki]# kubectl config set-credentials kubernetes-admin --client-certificate=/etc/kubernetes/pki/admin.pem --client-key=/etc/kubernetes/pki/admin-key.pem --embed-certs=true --kubeconfig=/etc/kubernetes/admin.kubeconfig
User "kubernetes-admin" set.
[root@k8s-master01 pki]#
[root@k8s-master01 pki]# kubectl config set-context kubernetes-admin@kubernetes --cluster=kubernetes --user=kubernetes-admin --kubeconfig=/etc/kubernetes/admin.kubeconfig
Context "kubernetes-admin@kubernetes" created.
[root@k8s-master01 pki]#
[root@k8s-master01 pki]# kubectl config use-context kubernetes-admin@kubernetes --kubeconfig=/etc/kubernetes/admin.kubeconfig
Switched to context "kubernetes-admin@kubernetes".
[root@k8s-master01 pki]# for NODE in k8s-master01 k8s-master02 k8s-master03; do
cp kubelet-csr.json kubelet-$NODE-csr.json; sed -i "s/$NODE/$NODE/g" kubelet-$NODE-csr.json; cfssl gencert -ca=/etc/kubernetes/pki/ca.pem -ca-key=/etc/kubernetes/pki/ca-key.pem -config=ca-config.json -hostname=$NODE -profile=kubernetes kubelet-$NODE-csr.json | cfssljson -bare /etc/kubernetes/pki/kubelet-$NODE; rm -f kubelet-$NODE-csr.jsondone
2019/11/02 21:03:19 [INFO] generate received request
2019/11/02 21:03:19 [INFO] received CSR
2019/11/02 21:03:19 [INFO] generating key: rsa-2048
2019/11/02 21:03:20 [INFO] encoded CSR
2019/11/02 21:03:20 [INFO] signed certificate with serial number 537071233304209996689594645648717291884343909273
2019/11/02 21:03:20 [INFO] generate received request
2019/11/02 21:03:20 [INFO] received CSR
2019/11/02 21:03:20 [INFO] generating key: rsa-2048
2019/11/02 21:03:20 [INFO] encoded CSR
2019/11/02 21:03:20 [INFO] signed certificate with serial number 93675644052244007817881327407761955585316699106
2019/11/02 21:03:20 [INFO] generate received request
2019/11/02 21:03:20 [INFO] received CSR
2019/11/02 21:03:20 [INFO] generating key: rsa-2048
2019/11/02 21:03:21 [INFO] encoded CSR
2019/11/02 21:03:21 [INFO] signed certificate with serial number 369432006714320793581219965286097236027135622831
[root@k8s-master01 pki]# for NODE in k8s-master01 k8s-master02 k8s-master03; do
ssh $NODE "mkdir -p /etc/kubernetes/pki" scp /etc/kubernetes/pki/ca.pem $NODE:/etc/kubernetes/pki/ca.pem scp /etc/kubernetes/pki/kubelet-$NODE-key.pem $NODE:/etc/kubernetes/pki/kubelet-key.pem scp /etc/kubernetes/pki/kubelet-$NODE.pem $NODE:/etc/kubernetes/pki/kubelet.pem rm -f /etc/kubernetes/pki/kubelet-$NODE-key.pem /etc/kubernetes/pki/kubelet-$NODE.pemdone
ca.pem 100% 1407 494.1KB/s 00:00
kubelet-k8s-master01-key.pem 100% 1679 549.9KB/s 00:00
kubelet-k8s-master01.pem 100% 1501 535.5KB/s 00:00
ca.pem 100% 1407 358.2KB/s 00:00
kubelet-k8s-master02-key.pem 100% 1675 539.8KB/s 00:00
kubelet-k8s-master02.pem 100% 1501 375.5KB/s 00:00
ca.pem 100% 1407 464.7KB/s 00:00
kubelet-k8s-master03-key.pem 100% 1679 566.2KB/s 00:00
kubelet-k8s-master03.pem 100% 1501 515.1KB/s 00:00
[root@k8s-master01 pki]# for NODE in k8s-master01 k8s-master02 k8s-master03; do
ssh $NODE "cd /etc/kubernetes/pki && kubectl config set-cluster kubernetes --certificate-authority=/etc/kubernetes/pki/ca.pem --embed-certs=true --server=https://192.168.1.88:8443 --kubeconfig=/etc/kubernetes/kubelet.kubeconfig && kubectl config set-credentials system:node:${NODE} --client-certificate=/etc/kubernetes/pki/kubelet.pem --client-key=/etc/kubernetes/pki/kubelet-key.pem --embed-certs=true --kubeconfig=/etc/kubernetes/kubelet.kubeconfig && kubectl config set-context system:node:${NODE}@kubernetes --cluster=kubernetes --user=system:node:${NODE} --kubeconfig=/etc/kubernetes/kubelet.kubeconfig && kubectl config use-context system:node:${NODE}@kubernetes --kubeconfig=/etc/kubernetes/kubelet.kubeconfig"done
Cluster "kubernetes" set.
User "system:node:k8s-master01" set.
Context "system:node:k8s-master01@kubernetes" created.
Switched to context "system:node:k8s-master01@kubernetes".
Cluster "kubernetes" set.
User "system:node:k8s-master02" set.
Context "system:node:k8s-master02@kubernetes" created.
Switched to context "system:node:k8s-master02@kubernetes".
Cluster "kubernetes" set.
User "system:node:k8s-master03" set.
Context "system:node:k8s-master03@kubernetes" created.
Switched to context "system:node:k8s-master03@kubernetes".
创建ServiceAccount Key
[root@k8s-master01 pki]# openssl genrsa -out /etc/kubernetes/pki/sa.key 2048
Generating RSA private key, 2048 bit long modulus (2 primes)
...................................................................................+++++
...............+++++
e is 65537 (0x010001)
[root@k8s-master01 pki]# openssl rsa -in /etc/kubernetes/pki/sa.key -pubout -out /etc/kubernetes/pki/sa.pub
writing RSA key
[root@k8s-master01 pki]# for NODE in k8s-master02 k8s-master03; do
for FILE in $(ls /etc/kubernetes/pki | grep -v etcd); dofig; do
scp /etc/kubernetes/${FILE} $NODE:/etc/kubernetes/${FILE}
done
done
scp /etc/kubernetes/pki/${FILE} $NODE:/etc/kubernetes/pki/${FILE}
done
for FILE in admin.kubeconfig controller-manager.kubeconfig scheduler.kubeconfig; do
scp /etc/kubernetes/${FILE} $NODE:/etc/kubernetes/${FILE}
done
done
admin.csr 100% 1025 303.5KB/s 00:00
admin-key.pem 100% 1675 544.2KB/s 00:00
admin.pem 100% 1440 447.6KB/s 00:00
apiserver.csr 100% 1029 251.9KB/s 00:00
apiserver-key.pem 100% 1679 579.5KB/s 00:00
apiserver.pem 100% 1692 592.0KB/s 00:00
ca.csr 100% 1025 372.6KB/s 00:00
ca-key.pem 100% 1679 535.5KB/s 00:00
ca.pem 100% 1407 496.0KB/s 00:00
controller-manager.csr 100% 1082 273.4KB/s 00:00
controller-manager-key.pem 100% 1679 552.8KB/s 00:00
controller-manager.pem 100% 1497 246.7KB/s 00:00
front-proxy-ca.csr 100% 891 322.2KB/s 00:00
front-proxy-ca-key.pem 100% 1679 408.7KB/s 00:00
front-proxy-ca.pem 100% 1143 436.9KB/s 00:00
front-proxy-client.csr 100% 903 283.5KB/s 00:00
front-proxy-client-key.pem 100% 1679 265.2KB/s 00:00
front-proxy-client.pem 100% 1188 358.8KB/s 00:00
kubelet-k8s-master01.csr 100% 1050 235.6KB/s 00:00
kubelet-k8s-master02.csr 100% 1050 385.3KB/s 00:00
kubelet-k8s-master03.csr 100% 1050 319.8KB/s 00:00
kubelet-key.pem 100% 1679 562.2KB/s 00:00
kubelet.pem 100% 1501 349.4KB/s 00:00
sa.key 100% 1679 455.2KB/s 00:00
sa.pub 100% 451 152.3KB/s 00:00
scheduler.csr 100% 1058 402.0KB/s 00:00
scheduler-key.pem 100% 1675 291.8KB/s 00:00
scheduler.pem 100% 1472 426.2KB/s 00:00
admin.kubeconfig 100% 6432 1.5MB/s 00:00
controller-manager.kubeconfig 100% 6568 1.1MB/s 00:00
scheduler.kubeconfig 100% 6496 601.6KB/s 00:00
admin.csr 100% 1025 368.2KB/s 00:00
admin-key.pem 100% 1675 542.3KB/s 00:00
admin.pem 100% 1440 247.7KB/s 00:00
apiserver.csr 100% 1029 212.4KB/s 00:00
apiserver-key.pem 100% 1679 530.8KB/s 00:00
apiserver.pem 100% 1692 557.3KB/s 00:00
ca.csr 100% 1025 266.4KB/s 00:00
ca-key.pem 100% 1679 408.6KB/s 00:00
ca.pem 100% 1407 404.6KB/s 00:00
controller-manager.csr 100% 1082 248.9KB/s 00:00
controller-manager-key.pem 100% 1679 495.4KB/s 00:00
controller-manager.pem 100% 1497 262.1KB/s 00:00
front-proxy-ca.csr 100% 891 140.9KB/s 00:00
front-proxy-ca-key.pem 100% 1679 418.7KB/s 00:00
front-proxy-ca.pem 100% 1143 362.3KB/s 00:00
front-proxy-client.csr 100% 903 305.6KB/s 00:00
front-proxy-client-key.pem 100% 1679 342.7KB/s 00:00
front-proxy-client.pem 100% 1188 235.1KB/s 00:00
kubelet-k8s-master01.csr 100% 1050 215.1KB/s 00:00
kubelet-k8s-master02.csr 100% 1050 354.0KB/s 00:00
kubelet-k8s-master03.csr 100% 1050 243.0KB/s 00:00
kubelet-key.pem 100% 1679 591.3KB/s 00:00
kubelet.pem 100% 1501 557.0KB/s 00:00
sa.key 100% 1679 387.5KB/s 00:00
sa.pub 100% 451 154.0KB/s 00:00
scheduler.csr 100% 1058 191.5KB/s 00:00
scheduler-key.pem 100% 1675 426.3KB/s 00:00
scheduler.pem 100% 1472 561.3KB/s 00:00
admin.kubeconfig 100% 6432 1.3MB/s 00:00
controller-manager.kubeconfig 100% 6568 1.7MB/s 00:00
scheduler.kubeconfig 100% 6496 1.3MB/s 00:00
6. Kubernetes系统组件配置
etcd配置大致相同，注意修改每个Master节点的etcd配置的主机名和IP地址
name: ‘k8s-master01‘
data-dir: /var/lib/etcd
wal-dir: /var/lib/etcd/wal
snapshot-count: 5000
heartbeat-interval: 100
election-timeout: 1000
quota-backend-bytes: 0
listen-peer-urls: ‘https://192.168.1.19:2380‘
listen-client-urls: ‘https://192.168.1.19:2379,http://127.0.0.1:2379‘
max-snapshots: 3
max-wals: 5
cors:
initial-advertise-peer-urls: ‘https://192.168.1.19:2380‘
advertise-client-urls: ‘https://192.168.1.19:2379‘
discovery:
discovery-fallback: ‘proxy‘
discovery-proxy:
discovery-srv:
initial-cluster: ‘k8s-master01=https://192.168.1.19:2380,k8s-master02=https://192.168.1.18:2380,k8s-master03=https://192.168.1.20:2380‘
initial-cluster-token: ‘etcd-k8s-cluster‘
initial-cluster-state: ‘new‘
strict-reconfig-check: false
enable-v2: true
enable-pprof: true
proxy: ‘off‘
proxy-failure-wait: 5000
proxy-refresh-interval: 30000
proxy-dial-timeout: 1000
proxy-write-timeout: 5000
proxy-read-timeout: 0
client-transport-security:
ca-file: ‘/etc/kubernetes/pki/etcd/etcd-ca.pem‘
cert-file: ‘/etc/kubernetes/pki/etcd/etcd.pem‘
key-file: ‘/etc/kubernetes/pki/etcd/etcd-key.pem‘
client-cert-auth: true
trusted-ca-file: ‘/etc/kubernetes/pki/etcd/etcd-ca.pem‘
auto-tls: true
peer-transport-security:
ca-file: ‘/etc/kubernetes/pki/etcd/etcd-ca.pem‘
cert-file: ‘/etc/kubernetes/pki/etcd/etcd.pem‘
key-file: ‘/etc/kubernetes/pki/etcd/etcd-key.pem‘
peer-client-cert-auth: true
trusted-ca-file: ‘/etc/kubernetes/pki/etcd/etcd-ca.pem‘
auto-tls: true
debug: false
log-package-levels:
log-output: default
force-new-cluster: false
所有Master节点创建etcd service并启动
[root@k8s-master01 pki]# cat /usr/lib/systemd/system/etcd.service
[Unit]
Description=Etcd Service
Documentation=https://coreos.com/etcd/docs/latest/
After=network.target
[Service]
Type=notify
ExecStart=/usr/local/bin/etcd --config-file=/etc/etcd/etcd.config.yml
Restart=on-failure
RestartSec=10
LimitNOFILE=65536
[Install]
WantedBy=multi-user.target
Alias=etcd3.service
[root@k8s-master01 pki]# mkdir /etc/kubernetes/pki/etcd
[root@k8s-master01 pki]# ln -s /etc/etcd/ssl/* /etc/kubernetes/pki/etcd/
[root@k8s-master01 pki]# systemctl daemon-reload
[root@k8s-master01 pki]# systemctl enable --now etcd
Created symlink /etc/systemd/system/etcd3.service → /usr/lib/systemd/system/etcd.service.
Created symlink /etc/systemd/system/multi-user.target.wants/etcd.service → /usr/lib/systemd/system/etcd.service.
高可用配置
所有Master节点安装keepalived和haproxy
yum install keepalived haproxy -y
HAProxy配置
[root@k8s-master01 pki]# cat /etc/haproxy/haproxy.cfg
global
maxconn 2000
ulimit-n 16384
log 127.0.0.1 local0 err
stats timeout 30s
defaults
log global
mode http
option httplog
timeout connect 5000
timeout client 50000
timeout server 50000
timeout http-request 15s
timeout http-keep-alive 15s
frontend monitor-in
bind *:33305
mode http
option httplog
monitor-uri /monitor
listen stats
bind *:8006
mode http
stats enable
stats hide-version
stats uri /stats
stats refresh 30s
stats realm Haproxy Statistics
stats auth admin:admin
frontend k8s-master
bind 0.0.0.0:8443
bind 127.0.0.1:8443
mode tcp
option tcplog
tcp-request inspect-delay 5s
default_backend k8s-master
backend k8s-master
mode tcp
option tcplog
option tcp-check
balance roundrobin
default-server inter 10s downinter 5s rise 2 fall 2 slowstart 60s maxconn 250 maxqueue 256 weight 100
server k8s-master01 192.168.1.19:6443 check
server k8s-master02 192.168.1.18:6443 check
server k8s-master03 192.168.1.20:6443 check
KeepAlived配置
! Configuration File for keepalived
global_defs {
router_id LVS_DEVEL
}
vrrp_script chk_apiserver {
script "/etc/keepalived/check_apiserver.sh"
interval 2
weight -5
fall 3
rise 2
}
vrrp_instance VI_1 {
state MASTER
interface ens160
mcast_src_ip 192.168.1.19
virtual_router_id 51
priority 100
advert_int 2
authentication {
auth_type PASS
auth_pass K8SHA_KA_AUTH
}
virtual_ipaddress {
192.168.1.88
}
track_script {
chk_apiserver
} }
健康检查配置
[root@k8s-master01 keepalived]# cat /etc/keepalived/check_apiserver.sh
#!/bin/bash
err=0
for k in $(seq 1 5)
do
check_code=$(pgrep kube-apiserver)
if [[ $check_code == "" ]]; then
err=$(expr $err + 1)
sleep 5
continue
else
err=0
break
fi
done
if [[ $err != "0" ]]; then
echo "systemctl stop keepalived"
/usr/bin/systemctl stop keepalived
exit 1
else
exit 0
fi
启动HAProxy和KeepAlived
[root@k8s-master01 keepalived]# systemctl enable --now haproxy
[root@k8s-master01 keepalived]# systemctl enable --now keepalived
VIP测试
[root@k8s-master01 pki]# ping 192.168.1.88
PING 192.168.1.88 (192.168.1.88) 56(84) bytes of data.
64 bytes from 192.168.1.88: icmp_seq=1 ttl=64 time=1.39 ms
64 bytes from 192.168.1.88: icmp_seq=2 ttl=64 time=2.46 ms
64 bytes from 192.168.1.88: icmp_seq=3 ttl=64 time=1.68 ms
64 bytes from 192.168.1.88: icmp_seq=4 ttl=64 time=1.08 ms
Kubernetes组件配置
所有节点创建相关目录
[root@k8s-master01 pki]# mkdir -p /etc/kubernetes/manifests/ /etc/systemd/system/kubelet.service.d /var/lib/kubelet /var/log/kubernetes
所有Master节点创建kube-apiserver service
[root@k8s-master01 pki]# cat /usr/lib/systemd/system/kube-apiserver.service
[Unit]
Description=Kubernetes API Server
Documentation=https://github.com/kubernetes/kubernetes
After=network.target
[Service]
ExecStart=/usr/local/bin/kube-apiserver
--v=2
--logtostderr=true
--allow-privileged=true
--bind-address=0.0.0.0
--secure-port=6443
--insecure-port=0
--advertise-address=192.168.1.88
--service-cluster-ip-range=10.96.0.0/12
--service-node-port-range=30000-32767
--etcd-servers=https://192.168.1.19:2379,https://192.168.1.18:2379,https://192.168.1.20:2379
--etcd-cafile=/etc/etcd/ssl/etcd-ca.pem
--etcd-certfile=/etc/etcd/ssl/etcd.pem
--etcd-keyfile=/etc/etcd/ssl/etcd-key.pem
--client-ca-file=/etc/kubernetes/pki/ca.pem
--tls-cert-file=/etc/kubernetes/pki/apiserver.pem
--tls-private-key-file=/etc/kubernetes/pki/apiserver-key.pem
--kubelet-client-certificate=/etc/kubernetes/pki/apiserver.pem
--kubelet-client-key=/etc/kubernetes/pki/apiserver-key.pem
--service-account-key-file=/etc/kubernetes/pki/sa.pub
--kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname
--enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,NodeRestriction,ResourceQuota
--authorization-mode=Node,RBAC
--enable-bootstrap-token-auth=true
--requestheader-client-ca-file=/etc/kubernetes/pki/front-proxy-ca.pem
--proxy-client-cert-file=/etc/kubernetes/pki/front-proxy-client.pem
--proxy-client-key-file=/etc/kubernetes/pki/front-proxy-client-key.pem
--requestheader-allowed-names=aggregator
--requestheader-group-headers=X-Remote-Group
--requestheader-extra-headers-prefix=X-Remote-Extra-
--requestheader-username-headers=X-Remote-User
--token-auth-file=/etc/kubernetes/token.csv
Restart=on-failure
RestartSec=10s
LimitNOFILE=65535
[Install]
WantedBy=multi-user.target
[root@k8s-master01 pki]# vim /etc/kubernetes/token.csv
[root@k8s-master01 pki]# cat !$
cat /etc/kubernetes/token.csv
d7d356746b508a1a478e49968fba7947,kubelet-bootstrap,10001,"system:kubelet-bootstrap"
所有Master节点开启kube-apiserver
[root@k8s-master01 pki]# systemctl enable --now kube-apiserver
所有Master节点配置kube-controller-manager service
[root@k8s-master01 pki]# cat /usr/lib/systemd/system/kube-controller-manager.service
[Unit]
Description=Kubernetes Controller Manager
Documentation=https://github.com/kubernetes/kubernetes
After=network.target
[Service]
ExecStart=/usr/local/bin/kube-controller-manager
--v=2
--logtostderr=true
--address=127.0.0.1
--root-ca-file=/etc/kubernetes/pki/ca.pem
--cluster-signing-cert-file=/etc/kubernetes/pki/ca.pem
--cluster-signing-key-file=/etc/kubernetes/pki/ca-key.pem
--service-account-private-key-file=/etc/kubernetes/pki/sa.key
--kubeconfig=/etc/kubernetes/controller-manager.kubeconfig
--leader-elect=true
--use-service-account-credentials=true
--node-monitor-grace-period=40s
--node-monitor-period=5s
--pod-eviction-timeout=2m0s
--controllers=*,bootstrapsigner,tokencleaner
--allocate-node-cidrs=true
--cluster-cidr=10.244.0.0/16
--requestheader-client-ca-file=/etc/kubernetes/pki/front-proxy-ca.pem
--node-cidr-mask-size=24
Restart=always
RestartSec=10s
[Install]
WantedBy=multi-user.target
所有Master节点启动kube-controller-manager
[root@k8s-master01 pki]# systemctl daemon-reload
[root@k8s-master01 pki]# systemctl enable --now kube-controller-manager
Created symlink /etc/systemd/system/multi-user.target.wants/kube-controller-manager.service → /usr/lib/systemd/system/kube-controller-manager.service.
所有Master节点配置kube-scheduler service
[root@k8s-master01 pki]# cat /usr/lib/systemd/system/kube-scheduler.service
[Unit]
Description=Kubernetes Scheduler
Documentation=https://github.com/kubernetes/kubernetes
After=network.target
[Service]
ExecStart=/usr/local/bin/kube-scheduler
--v=2
--logtostderr=true
--address=127.0.0.1
--leader-elect=true
--kubeconfig=/etc/kubernetes/scheduler.kubeconfig
Restart=always
RestartSec=10s
[Install]
WantedBy=multi-user.target
[root@k8s-master01 pki]# systemctl daemon-reload
[root@k8s-master01 pki]# systemctl enable --now kube-scheduler
Created symlink /etc/systemd/system/multi-user.target.wants/kube-scheduler.service → /usr/lib/systemd/system/kube-scheduler.service.
7. TLS Bootstrapping配置
在Master01创建bootstrap
kubectl config set-cluster kubernetes --certificate-authority=/etc/kubernetes/pki/ca.pem --embed-certs=true --server=https://192.168.1.88:8443 --kubeconfig=/etc/kubernetes/bootstrap-kubelet.kubeconfig
kubectl config set-credentials tls-bootstrap-token-user --token=c8ad9c.2e4d610cf3e7426e --kubeconfig=/etc/kubernetes/bootstrap-kubelet.kubeconfig
kubectl config set-context tls-bootstrap-token-user@kubernetes --cluster=kubernetes --user=tls-bootstrap-token-user --kubeconfig=/etc/kubernetes/bootstrap-kubelet.kubeconfig
kubectl config use-context tls-bootstrap-token-user@kubernetes --kubeconfig=/etc/kubernetes/bootstrap-kubelet.kubeconfig
[root@k8s-master01 bootstrap]# pwd
/root/k8s-ha-install/bootstrap
[root@k8s-master01 bootstrap]# kubectl create -f bootstrap.secret.yaml
secret/bootstrap-token-c8ad9c created
clusterrolebinding.rbac.authorization.k8s.io/kubelet-bootstrap created
clusterrolebinding.rbac.authorization.k8s.io/node-autoapprove-bootstrap created
clusterrolebinding.rbac.authorization.k8s.io/node-autoapprove-certificate-rotation created
clusterrole.rbac.authorization.k8s.io/system:kube-apiserver-to-kubelet created
clusterrolebinding.rbac.authorization.k8s.io/system:kube-apiserver created
8. Node节点配置
复制证书至Node节点
[root@k8s-master01 bootstrap]# for NODE in k8s-node01 k8s-node02; do
ssh $NODE mkdir -p /etc/kubernetes/pki /etc/etcd/ssl /etc/etcd/ssl for FILE in etcd-ca.pem etcd.pem etcd-key.pem; do scp /etc/etcd/ssl/$FILE $NODE:/etc/etcd/ssl/ done for FILE in pki/ca.pem pki/ca-key.pem pki/front-proxy-ca.pem bootstrap-kubelet.kubeconfig; do scp /etc/kubernetes/$FILE $NODE:/etc/kubernetes/${FILE}done
done
etcd-ca.pem 100% 1363 314.0KB/s 00:00
etcd.pem 100% 1505 429.1KB/s 00:00
etcd-key.pem 100% 1679 361.9KB/s 00:00
ca.pem 100% 1407 459.5KB/s 00:00
ca-key.pem 100% 1679 475.2KB/s 00:00
front-proxy-ca.pem 100% 1143 214.5KB/s 00:00
bootstrap-kubelet.kubeconfig 100% 2291 695.1KB/s 00:00
etcd-ca.pem 100% 1363 325.5KB/s 00:00
etcd.pem 100% 1505 301.2KB/s 00:00
etcd-key.pem 100% 1679 260.9KB/s 00:00
ca.pem 100% 1407 420.8KB/s 00:00
ca-key.pem 100% 1679 398.0KB/s 00:00
front-proxy-ca.pem 100% 1143 224.9KB/s 00:00
bootstrap-kubelet.kubeconfig 100% 2291 685.4KB/s 00:00
所有Node节点创建相关目录
mkdir -p /var/lib/kubelet /var/log/kubernetes /etc/systemd/system/kubelet.service.d /etc/kubernetes/manifests/
所有节点配置kubelet service（Master节点不部署Pod也可无需配置）
[root@k8s-master01 bootstrap]# vim /usr/lib/systemd/system/kubelet.service
[root@k8s-master01 bootstrap]# cat !$
cat /usr/lib/systemd/system/kubelet.service
[Unit]
Description=Kubernetes Kubelet
Documentation=https://github.com/kubernetes/kubernetes
After=docker.service
Requires=docker.service
[Service]
ExecStart=/usr/local/bin/kubelet
Restart=always
StartLimitInterval=0
RestartSec=10
[Install]
WantedBy=multi-user.target
[root@k8s-master01 bootstrap]# vim /etc/systemd/system/kubelet.service.d/10-kubelet.conf
[root@k8s-master01 bootstrap]# cat !$
cat /etc/systemd/system/kubelet.service.d/10-kubelet.conf
[Service]
Environment=" KUBELET_KUBECONFIG_ARGS=--bootstrap-kubeconfig=/etc/kubernetes/bootstrap-kubelet.kubeconfig --kubeconfig=/etc/kubernetes/kubelet.kubeconfig"
Environment="KUBELET_SYSTEM_ARGS=--network-plugin=cni --cni-conf-dir=/etc/cni/net.d --cni-bin-dir=/opt/cni/bin"
Environment="KUBELET_CONFIG_ARGS=--config=/etc/kubernetes/kubelet-conf.yml"
Environment="KUBELET_EXTRA_ARGS=--node-labels=node.kubernetes.io/node=‘‘ --pod-infra-container-image=registry.cn-hangzhou.aliyuncs.com/google_containers/pause-amd64:3.1"
ExecStart=
ExecStart=/usr/local/bin/kubelet $KUBELET_KUBECONFIG_ARGS $KUBELET_CONFIG_ARGS $KUBELET_SYSTEM_ARGS $KUBELET_EXTRA_ARGS
[root@k8s-master01 bootstrap]# vim /etc/kubernetes/kubelet-conf.yml
[root@k8s-master01 bootstrap]# cat !$
cat /etc/kubernetes/kubelet-conf.yml
apiVersion: kubelet.config.k8s.io/v1beta1
kind: KubeletConfiguration
address: 0.0.0.0
port: 10250
readOnlyPort: 10255
authentication:
anonymous:
enabled: false
webhook:
cacheTTL: 2m0s
enabled: true
x509:
clientCAFile: /etc/kubernetes/pki/ca.pem
authorization:
mode: Webhook
webhook:
cacheAuthorizedTTL: 5m0s
cacheUnauthorizedTTL: 30s
cgroupDriver: cgroupfs
cgroupsPerQOS: true
clusterDNS:
- 10.96.0.10
clusterDomain: cluster.local
containerLogMaxFiles: 5
containerLogMaxSize: 10Mi
contentType: application/vnd.kubernetes.protobuf
cpuCFSQuota: true
cpuManagerPolicy: none
cpuManagerReconcilePeriod: 10s
enableControllerAttachDetach: true
enableDebuggingHandlers: true
enforceNodeAllocatable: - pods
eventBurst: 10
eventRecordQPS: 5
evictionHard:
imagefs.available: 15%
memory.available: 100Mi
nodefs.available: 10%
nodefs.inodesFree: 5%
evictionPressureTransitionPeriod: 5m0s
failSwapOn: true
fileCheckFrequency: 20s
hairpinMode: promiscuous-bridge
healthzBindAddress: 127.0.0.1
healthzPort: 10248
httpCheckFrequency: 20s
imageGCHighThresholdPercent: 85
imageGCLowThresholdPercent: 80
imageMinimumGCAge: 2m0s
iptablesDropBit: 15
iptablesMasqueradeBit: 14
kubeAPIBurst: 10
kubeAPIQPS: 5
makeIPTablesUtilChains: true
maxOpenFiles: 1000000
maxPods: 110
nodeStatusUpdateFrequency: 10s
oomScoreAdj: -999
podPidsLimit: -1
registryBurst: 10
registryPullQPS: 5
resolvConf: /etc/resolv.conf
rotateCertificates: true
runtimeRequestTimeout: 2m0s
serializeImagePulls: true
staticPodPath: /etc/kubernetes/manifests
streamingConnectionIdleTimeout: 4h0m0s
syncFrequency: 1m0s
volumeStatsAggPeriod: 1m0s
启动所有节点kubelet
systemctl daemon-reload
systemctl enable --now kubelet
查看集群状态
[root@k8s-master01 bootstrap]# kubectl get node
NAME STATUS ROLES AGE VERSION
k8s-master01 NotReady <none> 13m v1.16.2
k8s-master02 NotReady <none> 11m v1.16.2
k8s-master03 NotReady <none> 10m v1.16.2
k8s-node01 NotReady <none> 9m16s v1.16.2
k8s-node02 NotReady <none> 53s v1.16.2
Kube-Proxy配置
kubectl -n kube-system create serviceaccount kube-proxy
kubectl create clusterrolebinding system:kube-proxy --clusterrole system:node-proxier --serviceaccount kube-system:kube-proxy
SECRET=$(kubectl -n kube-system get sa/kube-proxy
--output=jsonpath=‘{.secrets[0].name}‘)
JWT_TOKEN=$(kubectl -n kube-system get secret/$SECRET
--output=jsonpath=‘{.data.token}‘ | base64 -d)
PKI_DIR=/etc/kubernetes/pki
K8S_DIR=/etc/kubernetes
kubectl config set-cluster kubernetes --certificate-authority=/etc/kubernetes/pki/ca.pem --embed-certs=true --server=https://192.168.1.88:8443 --kubeconfig=${K8S_DIR}/kube-proxy.kubeconfig
kubectl config set-credentials kubernetes --token=${JWT_TOKEN} --kubeconfig=/etc/kubernetes/kube-proxy.kubeconfig
kubectl config set-context kubernetes --cluster=kubernetes --user=kubernetes --kubeconfig=/etc/kubernetes/kube-proxy.kubeconfig
kubectl config use-context kubernetes --kubeconfig=/etc/kubernetes/kube-proxy.kubeconfig
赋值Service文件
[root@k8s-master01 k8s-ha-install]# for NODE in k8s-master01 k8s-master02 k8s-master03; do
scp ${K8S_DIR}/kube-proxy.kubeconfig $NODE:/etc/kubernetes/kube-proxy.kubeconfig scp kube-proxy/kube-proxy.conf $NODE:/etc/kubernetes/kube-proxy.conf scp kube-proxy/kube-proxy.service $NODE:/usr/lib/systemd/system/kube-proxy.servicedone
cp kube-proxy/kube-proxy.service $NODE:/usr/lib/systemd/system/kube-proxy.service
done
kube-proxy.kubeconfig 100% 3112 973.8KB/s 00:00
kube-proxy.conf 100% 813 196.5KB/s 00:00
kube-proxy.service 100% 288 115.5KB/s 00:00
kube-proxy.kubeconfig 100% 3112 580.5KB/s 00:00
kube-proxy.conf 100% 813 160.1KB/s 00:00
kube-proxy.service 100% 288 92.4KB/s 00:00
kube-proxy.kubeconfig 100% 3112 703.1KB/s 00:00
kube-proxy.conf 100% 813 244.1KB/s 00:00
kube-proxy.service 100% 288 54.6KB/s 00:00
[root@k8s-master01 k8s-ha-install]#
[root@k8s-master01 k8s-ha-install]# for NODE in k8s-node01 k8s-node02; do
scp /etc/kubernetes/kube-proxy.kubeconfig $NODE:/etc/kubernetes/kube-proxy.kubeconfig
scp kube-proxy/kube-proxy.conf $NODE:/etc/kubernetes/kube-proxy.conf
scp kube-proxy/kube-proxy.service $NODE:/usr/lib/systemd/system/kube-proxy.service
done
kube-proxy.kubeconfig 100% 3112 604.6KB/s 00:00
kube-proxy.conf 100% 813 197.6KB/s 00:00
kube-proxy.service 100% 288 95.5KB/s 00:00
kube-proxy.kubeconfig 100% 3112 749.3KB/s 00:00
kube-proxy.conf 100% 813 206.2KB/s 00:00
kube-proxy.service 100% 288 69.9KB/s 00:00
所有节点启动kube-proxy
[root@k8s-master01 k8s-ha-install]# systemctl daemon-reload
[root@k8s-master01 k8s-ha-install]# systemctl enable --now kube-proxy
Created symlink /etc/systemd/system/multi-user.target.wants/kube-proxy.service → /usr/lib/systemd/system/kube-proxy.service.
9. 安装calico
[root@k8s-master01 Calico]# cd /root/k8s-ha-install/Calico/
[root@k8s-master01 Calico]# POD_CIDR="10.244.0.0/16"
sed -i -e "s?192.168.0.0/16?$POD_CIDR?g" calico.yaml
[root@k8s-master01 Calico]# kubectl create -f calico.yaml
configmap/calico-config created
customresourcedefinition.apiextensions.k8s.io/felixconfigurations.crd.projectcalico.org created
customresourcedefinition.apiextensions.k8s.io/ipamblocks.crd.projectcalico.org created
customresourcedefinition.apiextensions.k8s.io/blockaffinities.crd.projectcalico.org created
customresourcedefinition.apiextensions.k8s.io/ipamhandles.crd.projectcalico.org created
customresourcedefinition.apiextensions.k8s.io/ipamconfigs.crd.projectcalico.org created
customresourcedefinition.apiextensions.k8s.io/bgppeers.crd.projectcalico.org created
customresourcedefinition.apiextensions.k8s.io/bgpconfigurations.crd.projectcalico.org created
customresourcedefinition.apiextensions.k8s.io/ippools.crd.projectcalico.org created
customresourcedefinition.apiextensions.k8s.io/hostendpoints.crd.projectcalico.org created
customresourcedefinition.apiextensions.k8s.io/clusterinformations.crd.projectcalico.org created
customresourcedefinition.apiextensions.k8s.io/globalnetworkpolicies.crd.projectcalico.org created
customresourcedefinition.apiextensions.k8s.io/globalnetworksets.crd.projectcalico.org created
customresourcedefinition.apiextensions.k8s.io/networkpolicies.crd.projectcalico.org created
customresourcedefinition.apiextensions.k8s.io/networksets.crd.projectcalico.org created
clusterrole.rbac.authorization.k8s.io/calico-kube-controllers created
clusterrolebinding.rbac.authorization.k8s.io/calico-kube-controllers created
clusterrole.rbac.authorization.k8s.io/calico-node created
clusterrolebinding.rbac.authorization.k8s.io/calico-node created
daemonset.apps/calico-node created
serviceaccount/calico-node created
deployment.apps/calico-kube-controllers created
serviceaccount/calico-kube-controllers created
查看Calico状态
[root@k8s-master01 Calico]# kubectl get po -n kube-system
NAME READY STATUS RESTARTS AGE
calico-kube-controllers-6d85fdfbd8-2jtj9 1/1 Running 0 3m38s
calico-node-5t9kj 1/1 Running 0 3m38s
calico-node-9ftns 1/1 Running 0 3m38s
calico-node-b6rsl 1/1 Running 0 3m38s
calico-node-hfqrd 1/1 Running 0 3m38s
calico-node-lpcmp 1/1 Running 0 3m38s
查看集群状态
[root@k8s-master01 Calico]# kubectl cluster-info
Kubernetes master is running at https://192.168.1.88:8443
To further debug and diagnose cluster problems, use ‘kubectl cluster-info dump‘.
[root@k8s-master01 Calico]# kubectl get node
NAME STATUS ROLES AGE VERSION
k8s-master01 Ready <none> 12h v1.16.2
k8s-master02 Ready <none> 13h v1.16.2
k8s-master03 Ready <none> 12h v1.16.2
k8s-node01 Ready <none> 12h v1.16.2
k8s-node02 Ready <none> 11h v1.16.2
至此集群安装完毕，其他组件可以参考本博客其他版本安装的文档。
参考《再也不踩坑的Kubernetes实战指南》
原文链接：https://www.cnblogs.com/dukuan/p/11780729.html
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