手动安装K8s第四节：Master节点

Posted 2020-11-17

0、准备软件包

cd /usr/local/src/kubernetes
[[email protected] kubernetes]# cp server/bin/kube-apiserver /opt/kubernetes/bin/
[[email protected] kubernetes]# cp server/bin/kube-controller-manager /opt/kubernetes/bin/
[[email protected] kubernetes]# cp server/bin/kube-scheduler /opt/kubernetes/bin/

1、创建生成CSR的 JSON 配置文件
[[email protected] ~]# cd /usr/local/src/ssl/
[[email protected] ssl]# vim kubernetes-csr.json
{
"CN": "kubernetes",
"hosts": [
"127.0.0.1",
"192.168.137.171",
"10.1.0.1",
"kubernetes",
"kubernetes.default",
"kubernetes.default.svc",
"kubernetes.default.svc.cluster",
"kubernetes.default.svc.cluster.local"
],
"key": {
"algo": "rsa",
"size": 2048
},
"names": [
{
"C": "CN",
"ST": "BeiJing",
"L": "BeiJing",
"O": "k8s",
"OU": "System"
}
]
}

2、生成 kubernetes 证书和私钥
[[email protected] ssl]# cfssl gencert -ca=/opt/kubernetes/ssl/ca.pem
-ca-key=/opt/kubernetes/ssl/ca-key.pem
-config=/opt/kubernetes/ssl/ca-config.json
-profile=kubernetes kubernetes-csr.json | cfssljson -bare kubernetes

2018/06/12 19:02:13 [INFO] generate received request
2018/06/12 19:02:13 [INFO] received CSR
2018/06/12 19:02:13 [INFO] generating key: rsa-2048
2018/06/12 19:02:14 [INFO] encoded CSR
2018/06/12 19:02:14 [INFO] signed certificate with serial number 386147679531467996147945114491457426445592492176
2018/06/12 19:02:14 [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").

[[email protected] ssl]# ll
-rw-r--r-- 1 root root 1245 Jun 12 19:02 kubernetes.csr
-rw-r--r-- 1 root root 437 Jun 12 19:01 kubernetes-csr.json
-rw------- 1 root root 1679 Jun 12 19:02 kubernetes-key.pem
-rw-r--r-- 1 root root 1610 Jun 12 19:02 kubernetes.pem

[[email protected] ssl]# cp kubernetes.pem /opt/kubernetes/ssl/
[[email protected] ssl]# scp kubernetes.pem k8snode1:/opt/kubernetes/ssl/
[[email protected] ssl]# scp kubernetes*.pem k8snode2:/opt/kubernetes/ssl/

3、创建 kube-apiserver 使用的客户端 token 文件
[[email protected] ~]# head -c 16 /dev/urandom | od -An -t x | tr -d ‘ ‘
ad6d5bb607a186796d8861557df0d17f

[[email protected] ~]# vim /opt/kubernetes/ssl/bootstrap-token.csv
ad6d5bb607a186796d8861557df0d17f,kubelet-bootstrap,10001,"system:kubelet-bootstrap"

4、创建基础用户名/密码认证配置
[[email protected] ~]# vim /opt/kubernetes/ssl/basic-auth.csv
admin,admin,1
readonly,readonly,2

5、部署Kubernetes API Server
[[email protected] ~]# vim /usr/lib/systemd/system/kube-apiserver.service

[Unit]
Description=Kubernetes API Server
Documentation=https://github.com/GoogleCloudPlatform/kubernetes
After=network.target

[Service]
ExecStart=/opt/kubernetes/bin/kube-apiserver
--admission-control=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,ResourceQuota,NodeRestriction
--bind-address=192.168.137.171
--insecure-bind-address=127.0.0.1
--authorization-mode=Node,RBAC
--runtime-config=rbac.authorization.k8s.io/v1
--kubelet-https=true
--anonymous-auth=false
--basic-auth-file=/opt/kubernetes/ssl/basic-auth.csv
--enable-bootstrap-token-auth
--token-auth-file=/opt/kubernetes/ssl/bootstrap-token.csv
--service-cluster-ip-range=10.1.0.0/16
--service-node-port-range=20000-40000
--tls-cert-file=/opt/kubernetes/ssl/kubernetes.pem
--tls-private-key-file=/opt/kubernetes/ssl/kubernetes-key.pem
--client-ca-file=/opt/kubernetes/ssl/ca.pem
--service-account-key-file=/opt/kubernetes/ssl/ca-key.pem
--etcd-cafile=/opt/kubernetes/ssl/ca.pem
--etcd-certfile=/opt/kubernetes/ssl/kubernetes.pem
--etcd-keyfile=/opt/kubernetes/ssl/kubernetes-key.pem
--etcd-servers=https://192.168.137.171:2379,https://192.168.137.201:2379,https://192.168.137.198:2379
--enable-swagger-ui=true
--allow-privileged=true
--audit-log-maxage=30
--audit-log-maxbackup=3
--audit-log-maxsize=100
--audit-log-path=/opt/kubernetes/log/api-audit.log
--event-ttl=1h
--v=2
--logtostderr=false
--log-dir=/opt/kubernetes/log
Restart=on-failure
RestartSec=5
Type=notify
LimitNOFILE=65536

[Install]
WantedBy=multi-user.target

6、启动API Server服务
[[email protected] ~]# systemctl daemon-reload
[[email protected] ~]# systemctl enable kube-apiserver
[[email protected] ~]# systemctl start kube-apiserver
[[email protected] ~]# systemctl status kube-apiserver

[[email protected] ~]# netstat -ntlp
Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address Foreign Address State PID/Program name
tcp 0 0 192.168.137.171:6443 0.0.0.0: LISTEN 4185/kube-apiserver
tcp 0 0 192.168.137.171:2379 0.0.0.0: LISTEN 3955/etcd
tcp 0 0 127.0.0.1:2379 0.0.0.0: LISTEN 3955/etcd
tcp 0 0 192.168.137.171:2380 0.0.0.0: LISTEN 3955/etcd
tcp 0 0 127.0.0.1:8080 0.0.0.0: LISTEN 4185/kube-apiserver
tcp 0 0 0.0.0.0:22 0.0.0.0: LISTEN 1154/sshd
tcp 0 0 127.0.0.1:25 0.0.0.0: LISTEN 1239/master
tcp6 0 0 :::22 ::: LISTEN 1154/sshd
tcp6 0 0 ::1:25 :::* LISTEN 1239/master

7、部署Controller Manager服务
[[email protected] ~]# vim /usr/lib/systemd/system/kube-controller-manager.service

[Unit]
Description=Kubernetes Controller Manager
Documentation=https://github.com/GoogleCloudPlatform/kubernetes

[Service]
ExecStart=/opt/kubernetes/bin/kube-controller-manager
--address=127.0.0.1
--master=http://127.0.0.1:8080
--allocate-node-cidrs=true
--service-cluster-ip-range=10.1.0.0/16
--cluster-cidr=10.2.0.0/16
--cluster-name=kubernetes
--cluster-signing-cert-file=/opt/kubernetes/ssl/ca.pem
--cluster-signing-key-file=/opt/kubernetes/ssl/ca-key.pem
--service-account-private-key-file=/opt/kubernetes/ssl/ca-key.pem
--root-ca-file=/opt/kubernetes/ssl/ca.pem
--leader-elect=true
--v=2
--logtostderr=false
--log-dir=/opt/kubernetes/log

Restart=on-failure
RestartSec=5

[Install]
WantedBy=multi-user.target

[[email protected] ~]# systemctl daemon-reload
[[email protected] ~]# systemctl enable kube-controller-manager

[[email protected] ~]# systemctl start kube-controller-manager
[[email protected] ~]# systemctl status kube-controller-manager

[[email protected] ~]# netstat -ntlp
Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address Foreign Address State PID/Program name
tcp 0 0 192.168.137.171:6443 0.0.0.0: LISTEN 4185/kube-apiserver
tcp 0 0 192.168.137.171:2379 0.0.0.0: LISTEN 3955/etcd
tcp 0 0 127.0.0.1:2379 0.0.0.0: LISTEN 3955/etcd
tcp 0 0 127.0.0.1:10252 0.0.0.0: LISTEN 4239/kube-controlle
tcp 1 0 192.168.137.171:2380 0.0.0.0: LISTEN 3955/etcd
tcp 0 0 127.0.0.1:8080 0.0.0.0: LISTEN 4185/kube-apiserver
tcp 0 0 0.0.0.0:22 0.0.0.0: LISTEN 1154/sshd
tcp 0 0 127.0.0.1:25 0.0.0.0: LISTEN 1239/master
tcp6 0 0 :::22 ::: LISTEN 1154/sshd
tcp6 0 0 ::1:25 ::: LISTEN 1239/master
[[email protected] ~]#

8、部署Kubernetes Scheduler
[[email protected] ~]# vim /usr/lib/systemd/system/kube-scheduler.service

[Unit]
Description=Kubernetes Scheduler
Documentation=https://github.com/GoogleCloudPlatform/kubernetes

[Service]
ExecStart=/opt/kubernetes/bin/kube-scheduler
--address=127.0.0.1
--master=http://127.0.0.1:8080
--leader-elect=true
--v=2
--logtostderr=false
--log-dir=/opt/kubernetes/log

Restart=on-failure
RestartSec=5

[Install]
WantedBy=multi-user.target

[[email protected] ~]# systemctl daemon-reload
[[email protected] ~]# systemctl enable kube-scheduler
[[email protected] ~]# systemctl start kube-scheduler
[[email protected] ~]# systemctl status kube-scheduler