基于centos7.9二进制部署kubernetes1.25.4（中）
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4、配置etcd
4-1、配置etcd
说明：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
# master01:
[root@k8s-master01 ~]# vim /etc/etcd/etcd.config.yml
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://192.168.100.153:2380
listen-client-urls: https://192.168.100.153:2379,http://127.0.0.1:2379
max-snapshots: 3
max-wals: 5
cors:
initial-advertise-peer-urls: https://192.168.100.153:2380
advertise-client-urls: https://192.168.100.153:2379
discovery:
discovery-fallback: proxy
discovery-proxy:
discovery-srv:
initial-cluster: k8s-master01=https://192.168.100.153:2380,k8s-master02=https://192.168.100.154:2380,k8s-master03=https://192.168.100.155:2380
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:
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:
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-outputs: [default]
force-new-cluster: false
# master02：
[root@k8s-master02 ~]# vim /etc/etcd/etcd.config.yml
name: k8s-master02
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://192.168.100.154:2380
listen-client-urls: https://192.168.100.154:2379,http://127.0.0.1:2379
max-snapshots: 3
max-wals: 5
cors:
initial-advertise-peer-urls: https://192.168.100.154:2380
advertise-client-urls: https://192.168.100.154:2379
discovery:
discovery-fallback: proxy
discovery-proxy:
discovery-srv:
initial-cluster: k8s-master01=https://192.168.100.153:2380,k8s-master02=https://192.168.100.154:2380,k8s-master03=https://192.168.100.155:2380
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:
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:
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-outputs: [default]
force-new-cluster: false
# master03：
[root@k8s-master03 ~]# vim /etc/etcd/etcd.config.yml
name: k8s-master03
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://192.168.100.155:2380
listen-client-urls: https://192.168.100.155:2379,http://127.0.0.1:2379
max-snapshots: 3
max-wals: 5
cors:
initial-advertise-peer-urls: https://192.168.100.155:2380
advertise-client-urls: https://192.168.100.155:2379
discovery:
discovery-fallback: proxy
discovery-proxy:
discovery-srv:
initial-cluster: k8s-master01=https://192.168.100.153:2380,k8s-master02=https://192.168.100.154:2380,k8s-master03=https://192.168.100.155:2380
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:
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:
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-outputs: [default]
force-new-cluster: false
4-2、创建用于etcd的service
# 所有Master节点创建etcd service并启动
[root@k8s-master01 ~]# vim /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
# 所有Master节点创建etcd的证书目录
[root@k8s-master01 ~]# mkdir /etc/kubernetes/pki/etcd
[root@k8s-master01 ~]# ln -s /etc/etcd/ssl/* /etc/kubernetes/pki/etcd/
[root@k8s-master01 ~]# systemctl daemon-reload
[root@k8s-master01 ~]# systemctl enable --now etcd
# 查看etcd状态
[root@k8s-master01 ~]# export ETCDCTL_API=3
[root@k8s-master01 ~]# etcdctl --endpoints="192.168.100.153:2379,192.168.100.154:2379,192.168.100.155:2379" --cacert=/etc/kubernetes/pki/etcd/etcd-ca.pem --cert=/etc/kubernetes/pki/etcd/etcd.pem --key=/etc/kubernetes/pki/etcd/etcd-key.pem endpoint status --write-out=table
+----------------------+------------------+---------+---------+-----------+------------+-----------+------------+--------------------+--------+
| ENDPOINT | ID | VERSION | DB SIZE | IS LEADER | IS LEARNER | RAFT TERM | RAFT INDEX | RAFT APPLIED INDEX | ERRORS |
+----------------------+------------------+---------+---------+-----------+------------+-----------+------------+--------------------+--------+
| 192.168.100.153:2379 | e9f58d0912257160 | 3.5.4 | 20 kB | true | false | 2 | 9 | 9 | |
| 192.168.100.154:2379 | 7b304cf1777afde5 | 3.5.4 | 25 kB | false | false | 2 | 9 | 9 | |
| 192.168.100.155:2379 | a3e2564921c8f7ea | 3.5.4 | 25 kB | false | false | 2 | 9 | 9 | |
+----------------------+------------------+---------+---------+-----------+------------+-----------+------------+--------------------+--------+
5、配置高可用
说明：如果不是高可用集群，haproxy和keepalived无需安装
5-1、配置haproxy
# 所有Master节点安装keepalived和haproxy
[root@k8s-master01 ~]# yum install keepalived haproxy -y
# 所有Master配置HAProxy，配置一样,删掉默认所有内容后复制下列内容
[root@k8s-master01 ~]# vim /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 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 192.168.100.153:6443 check
server k8s-master02 192.168.100.154:6443 check
server k8s-master03 192.168.100.155:6443 check
[root@k8s-master01 ~]# scp /etc/haproxy/haproxy.cfg 192.168.100.154:/etc/haproxy/haproxy.cfg
[root@k8s-master01 ~]# scp /etc/haproxy/haproxy.cfg 192.168.100.155:/etc/haproxy/haproxy.cfg
5-2、配置keepalived
# 所有Master节点配置KeepAlived，配置不一样，注意区分，默认内容删除后复制下列内容
# 下列内容interface eth0网卡名修改成自己Master机器的网卡名
# 注意每个节点的IP和网卡（interface后的网卡名参数）
# master01
[root@k8s-master01 ~]# vim /etc/keepalived/keepalived.conf
global_defs
router_id LVS_DEVEL
vrrp_script chk_apiserver
script "/etc/keepalived/check_apiserver.sh"
interval 5
weight -5
fall 2
rise 1
vrrp_instance VI_1
state MASTER
interface eth0
# mcast_src_ip 224.8.8.8
virtual_router_id 51
priority 101
nopreempt
advert_int 2
authentication
auth_type PASS
auth_pass 1111
virtual_ipaddress
192.168.100.99
unicast_src_ip 192.168.100.153
unicast_peer
192.168.100.154
192.168.100.155
track_script
chk_apiserver
[root@k8s-master01 ~]# vim /etc/keepalived/check_apiserver.sh
[root@k8s-master01 ~]# chmod +x /etc/keepalived/check_apiserver.sh
[root@k8s-master01 ~]# scp /etc/keepalived/check_apiserver.sh 192.168.100.154:/etc/keepalived/check_apiserver.sh
[root@k8s-master01 ~]# scp /etc/keepalived/check_apiserver.sh 192.168.100.155:/etc/keepalived/check_apiserver.sh
# master02
[root@k8s-master02 ~]# vim /etc/keepalived/keepalived.conf
global_defs
router_id LVS_DEVEL
vrrp_script chk_apiserver
script "/etc/keepalived/check_apiserver.sh"
interval 5
weight -5
fall 2
rise 1
vrrp_instance VI_1
state BACKUP
interface eth0
# mcast_src_ip 224.8.8.8
virtual_router_id 51
priority 100
nopreempt
advert_int 2
authentication
auth_type PASS
auth_pass 1111
virtual_ipaddress
192.168.100.99
unicast_src_ip 192.168.100.154
unicast_peer
192.168.100.153
192.168.100.155
track_script
chk_apiserver
# master03
[root@k8s-master03 ~]# vim /etc/keepalived/keepalived.conf
global_defs
router_id LVS_DEVEL
vrrp_script chk_apiserver
script "/etc/keepalived/check_apiserver.sh"
interval 5
weight -5
fall 2
rise 1
vrrp_instance VI_1
state BACKUP
interface eth0
# mcast_src_ip 224.8.8.8
virtual_router_id 51
priority 100
nopreempt
advert_int 2
authentication
auth_type PASS
auth_pass 1111
virtual_ipaddress
192.168.100.99
unicast_src_ip 192.168.100.155
unicast_peer
192.168.100.153
192.168.100.155
track_script
chk_apiserver
# 所有master节点
# 创建健康性检查脚本：
[root@k8s-master01 keepalived]# vim /etc/keepalived/check_apiserver.sh
#!/bin/bash
err=0
for k in $(seq 1 3)
do
check_code=$(pgrep haproxy)
if [[ $check_code == "" ]]; then
err=$(expr $err + 1)
sleep 1
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
[root@k8s-master01 ~]# chmod +x /etc/keepalived/check_apiserver.sh
# 所有master节点启动haproxy和keepalived
[root@k8s-master01 ~]# systemctl daemon-reload && systemctl enable --now haproxy && systemctl enable --now keepalived
[root@k8s-master01 ~]# systemctl status haproxy keepalived
[root@k8s-master02 ~]# ping 192.168.100.99
PING 192.168.100.99 (192.168.100.99) 56(84) bytes of data.
64 bytes from 192.168.100.99: icmp_seq=1 ttl=64 time=1.23 ms
[root@k8s-master02 ~]# telnet 192.168.100.99 8443
# 重要：如果安装了keepalived和haproxy，需要测试keepalived是否是正常的
# 如果ping不通且telnet没有出现 ]，则认为VIP不可以，不可在继续往下执行，需要排查keepalived的问题，比如防火墙和selinux，haproxy和keepalived的状态，监听端口等
6、配置k8s组件
# 所有节点
[root@k8s-master01 ~]# mkdir -p /etc/kubernetes/manifests/ /etc/systemd/system/kubelet.service.d /var/lib/kubelet /var/log/kubernetes
注意本文档使用的k8s service网段为192.168.0.0/16，该网段不能和宿主机的网段、Pod网段的重复，请按需修改
# master01:
[root@k8s-master01 ~]# vim /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 \\
--advertise-address=192.168.100.153 \\
--service-cluster-ip-range=10.96.0.0/16 \\
--service-node-port-range=30000-32767 \\
--etcd-servers=https://192.168.100.153:2379,https://192.168.100.154:2379,https://192.168.100.155:2379 \\
--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 \\
--service-account-signing-key-file=/etc/kubernetes/pki/sa.key \\
--service-account-issuer=https://kubernetes.default.svc.cluster.local \\
--kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname \\
--enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,NodeRestriction,ResourceQuota \\
--feature-gates=LegacyServiceAccountTokenNoAutoGeneration=false \\
--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
# master02:
[root@k8s-master02 ~]# vim /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 \\
--advertise-address=192.168.100.154 \\
--service-cluster-ip-range=10.96.0.0/16 \\
--service-node-port-range=30000-32767 \\
--etcd-servers=https://192.168.100.153:2379,https://192.168.100.154:2379,https://192.168.100.155:2379 \\
--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 \\
--service-account-signing-key-file=/etc/kubernetes/pki/sa.key \\
--service-account-issuer=https://kubernetes.default.svc.cluster.local \\
--kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname \\
--enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,NodeRestriction,ResourceQuota \\
--feature-gates=LegacyServiceAccountTokenNoAutoGeneration=false \\
--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
# master03:
[root@k8s-master03 ~]# vim /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 \\
--advertise-address=192.168.100.155 \\
--service-cluster-ip-range=10.96.0.0/16 \\
--service-node-port-range=30000-32767 \\
--etcd-servers=https://192.168.100.153:2379,https://192.168.100.154:2379,https://192.168.100.155:2379 \\
--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 \\
--service-account-signing-key-file=/etc/kubernetes/pki/sa.key \\
--service-account-issuer=https://kubernetes.default.svc.cluster.local \\
--kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname \\
--enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,NodeRestriction,ResourceQuota \\
--feature-gates=LegacyServiceAccountTokenNoAutoGeneration=false \\
--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
6-1、启动kube-apiserver
# 所有Master节点开启kube-apiserver
[root@k8s-master01 ~]# systemctl daemon-reload && systemctl enable --now kube-apiserver
[root@k8s-master01 ~]# systemctl status kube-apiserver
6-2、ControllerManager
说明：所有Master节点配置kube-controller-manager service（所有master节点配置一样）
注意本文档使用的k8s Pod网段为172.16.0.0/12，该网段不能和宿主机的网段、k8s Service网段的重复，请按需修改
# 所有Master节点:
[root@k8s-master01 ~]# vim /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 \\
--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 \\
--feature-gates=LegacyServiceAccountTokenNoAutoGeneration=false \\
--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=172.16.0.0/12 \\
--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 ~]# systemctl daemon-reload && systemctl enable --now kube-controller-manager && systemctl status kube-controller-manager
6-3、Schedule
说明：所有Master节点配置kube-scheduler service（所有master节点配置一样）
#所有master节点：
[root@k8s-master01 ~]# vim /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 \\
--leader-elect=true \\
--authentication-kubeconfig=/etc/kubernetes/scheduler.kubeconfig \\
--authorization-kubeconfig=/etc/kubernetes/scheduler.kubeconfig \\
--kubeconfig=/etc/kubernetes/scheduler.kubeconfig
Restart=always
RestartSec=10s
[Install]
WantedBy=multi-user.target
[root@k8s-master01 ~]# systemctl daemon-reload && systemctl enable --now kube-scheduler && systemctl status kube-scheduler
6-4、TLS Bootstrapping配置
说明：只需要在Master01创建bootstrap
注意，如果不是高可用集群，192.168.100.99:8443改为master01的地址，8443改为apiserver的端口，默认是6443
# master01：
[root@k8s-master01 ~]# cd /root/k8s-ha-install/bootstrap
[root@k8s-master01 bootstrap]# kubectl config set-cluster kubernetes --certificate-authority=/etc/kubernetes/pki/ca.pem --embed-certs=true --server=https://192.168.100.99:8443 --kubeconfig=/etc/kubernetes/bootstrap-kubelet.kubeconfig
[root@k8s-master01 bootstrap]# kubectl config set-credentials tls-bootstrap-token-user --token=c8ad9c.2e4d610cf3e7426e --kubeconfig=/etc/kubernetes/bootstrap-kubelet.kubeconfig
[root@k8s-master01 bootstrap]# kubectl config set-context tls-bootstrap-token-user@kubernetes --cluster=kubernetes --user=tls-bootstrap-token-user --kubeconfig=/etc/kubernetes/bootstrap-kubelet.kubeconfig
[root@k8s-master01 bootstrap]# kubectl config use-context tls-bootstrap-token-user@kubernetes --kubeconfig=/etc/kubernetes/bootstrap-kubelet.kubeconfig
注意：如果要修改bootstrap.secret.yaml的token-id和token-secret，需要保证下图红圈内的字符串一致的，并且位数是一样的。还要保证上个命令的黄色字体：c8ad9c.2e4d610cf3e7426e与你修改的字符串要一致
[root@k8s-master01 bootstrap]# mkdir -p /root/.kube ; cp /etc/kubernetes/admin.kubeconfig /root/.kube/config
# 可以正常查询集群状态，才可以继续往下，否则不行，需要排查k8s组件是否有故障
[root@k8s-master01 bootstrap]# kubectl get cs
Warning: v1 ComponentStatus is deprecated in v1.19+
NAME STATUS MESSAGE ERROR
controller-manager Unhealthy Get "https://127.0.0.1:10257/healthz": dial tcp 127.0.0.1:10257: connect: connection refused
scheduler Unhealthy Get "https://127.0.0.1:10259/healthz": dial tcp 127.0.0.1:10259: connect: connection refused
etcd-1 Healthy "health":"true","reason":""
etcd-0 Healthy "health":"true","reason":""
etcd-2 Healthy "health":"true","reason":""
[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
7、配置node节点
7-1、复制证书
# Master01节点复制证书至Node节点
[root@k8s-master01 bootstrap]# cd /etc/kubernetes/
[root@k8s-master01 kubernetes]#for NODE in k8s-master02 k8s-master03 k8s-node01 k8s-node02; do
ssh $NODE mkdir -p /etc/kubernetes/pki
for FILE in pki/ca.pem pki/ca-key.pem pki/front-proxy-ca.pem bootstrap-kubelet.kubeconfig; do
scp /etc/kubernetes/$FILE $NODE:/etc/kubernetes/$FILE
done
done
7-2、配置Kubelet
# 所有节点创建相关目录
[root@k8s-master01 kubernetes]# 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
[root@k8s-master01 kubernetes]# vim /usr/lib/systemd/system/kubelet.service
[Unit]
Descriptinotallow=Kubernetes Kubelet
Documentatinotallow=https://github.com/kubernetes/kubernetes
[Service]
ExecStart=/usr/local/bin/kubelet
Restart=always
StartLimitInterval=0
RestartSec=10
[Install]
WantedBy=multi-user.target
# 所有节点配置kubelet service的配置文件（也可以写到kubelet.service）
[root@k8s-master01 kubernetes]# vim /etc/systemd/system/kubelet.service.d/10-kubelet.conf
[Service]
Envirnotallow="KUBELET_KUBECONFIG_ARGS=--bootstrap-kubecnotallow=/etc/kubernetes/bootstrap-kubelet.kubeconfig --kubecnotallow=/etc/kubernetes/kubelet.kubeconfig"
Envirnotallow="KUBELET_SYSTEM_ARGS=--container-runtime=remote --runtime-request-timeout=15m --container-runtime-endpoint=unix:///run/containerd/containerd.sock"
Envirnotallow="KUBELET_CONFIG_ARGS=--cnotallow=/etc/kubernetes/kubelet-conf.yml"
Envirnotallow="KUBELET_EXTRA_ARGS=--node-labels=node.kubernetes.io/node= "
ExecStart=
ExecStart=/usr/local/bin/kubelet $KUBELET_KUBECONFIG_ARGS $KUBELET_CONFIG_ARGS $KUBELET_SYSTEM_ARGS $KUBELET_EXTRA_ARGS
# 创建kubelet的配置文件
注意：如果更改了k8s的service网段，需要更改kubelet-conf.yml 的clusterDNS:配置，改成k8s Service网段的第十个地址，比如10.96.0.10
[root@k8s-master01 kubernetes]# vim /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: systemd
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
[root@k8s-master01 kubernetes]# systemctl daemon-reload && systemctl enable --now
[root@k8s-master01 kubernetes]# systemctl status kubelet
7-3、kube-proxy配置
注意，如果不是高可用集群，192.168.100.99:8443改为master01的地址，8443改为apiserver的端口，默认是6443
# 以下操作只在Master01执行
[root@k8s-master01 kubernetes]# cd /root/k8s-ha-install
[root@k8s-master01 k8s-ha-install]# kubectl -n kube-system create serviceaccount kube-proxy
[root@k8s-master01 k8s-ha-install]# kubectl create clusterrolebinding system:kube-proxy --clusterrole system:node-proxier --serviceaccount kube-system:kube-proxy
[root@k8s-master01 k8s-ha-install]# SECRET=$(kubectl -n kube-system get sa/kube-proxy \\
--output=jsnotallow=.secrets[0].name)
[root@k8s-master01 k8s-ha-install]# JWT_TOKEN=$(kubectl -n kube-system get secret/$SECRET \\
--output=jsnotallow=.data.token | base64 -d)
[root@k8s-master01 k8s-ha-install]# PKI_DIR=/etc/kubernetes/pki
[root@k8s-master01 k8s-ha-install]# K8S_DIR=/etc/kubernetes
[root@k8s-master01 k8s-ha-install]# kubectl config set-cluster kubernetes --certificate-authority=/etc/kubernetes/pki/ca.pem --embed-certs=true --server=https://192.168.100.99:8443 --kubecnotallow=$K8S_DIR/kube-proxy.kubeconfig
[root@k8s-master01 k8s-ha-install]# kubectl config set-credentials kubernetes --token=$JWT_TOKEN --kubecnotallow=/etc/kubernetes/kube-proxy.kubeconfig
[root@k8s-master01 k8s-ha-install]# kubectl config set-context kubernetes --cluster=kubernetes --user=kubernetes --kubecnotallow=/etc/kubernetes/kube-proxy.kubeconfig
[root@k8s-master01 k8s-ha-install]# kubectl config use-context kubernetes --kubecnotallow=/etc/kubernetes/kube-proxy.kubeconfig
# 将kubeconfig发送至其他节点
[root@k8s-master01 k8s-ha-install]# for NODE in k8s-master02 k8s-master03; do
scp /etc/kubernetes/kube-proxy.kubeconfig $NODE:/etc/kubernetes/kube-proxy.kubeconfig
done
[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
done
# 所有节点添加kube-proxy的配置和service文件：
[root@k8s-master01 k8s-ha-install]# vim /usr/lib/systemd/system/kube-proxy.service
[Unit]
Descriptinotallow=Kubernetes Kube Proxy
Documentatinotallow=https://github.com/kubernetes/kubernetes
After=network.target
[Service]
ExecStart=/usr/local/bin/kube-proxy \\
--cnotallow=/etc/kubernetes/kube-proxy.yaml \\
--v=2
Restart=always
RestartSec=10s
[Install]
WantedBy=multi-user.target
# 如果更改了集群Pod的网段，需要更改kube-proxy.yaml的clusterCIDR为自己的Pod网段：
[root@k8s-master01 k8s-ha-install]# vim /etc/kubernetes/kube-proxy.yaml
apiVersion: kubeproxy.config.k8s.io/v1alpha1
bindAddress: 0.0.0.0
clientConnection:
acceptContentTypes: ""
burst: 10
contentType: application/vnd.kubernetes.protobuf
kubeconfig: /etc/kubernetes/kube-proxy.kubeconfig
qps: 5
clusterCIDR: 172.16.0.0/12
configSyncPeriod: 15m0s
conntrack:
max: null
maxPerCore: 32768
min: 131072
tcpCloseWaitTimeout: 1h0m0s
tcpEstablishedTimeout: 24h0m0s
enableProfiling: false
healthzBindAddress: 0.0.0.0:10256
hostnameOverride: ""
iptables:
masqueradeAll: false
masqueradeBit: 14
minSyncPeriod: 0s
syncPeriod: 30s
ipvs:
masqueradeAll: true
minSyncPeriod: 5s
scheduler: "rr"
syncPeriod: 30s
kind: KubeProxyConfiguration
metricsBindAddress: 127.0.0.1:10249
mode: "ipvs"
nodePortAddresses: null
oomScoreAdj: -999
portRange: ""
udpIdleTimeout: 250ms
# 所有节点启动kube-proxy
[root@k8s-master01 k8s-ha-install]# systemctl daemon-reload && systemctl enable --now kube-proxy && systemctl status kube-proxy
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