4.K8S部署-------- Master节点部署

部署Kubernetes API服务部署

如果没有特别指定在那台服务器执行命令。只需要按照文中的步骤执行即可

0.准备软件包

[root@linux-node1 ~]# cd /usr/local/src/kubernetes      #kubernets解压的目录

[root@linux-node1 kubernetes]# cp server/bin/kube-apiserver /opt/kubernetes/bin/

[root@linux-node1 kubernetes]# cp server/bin/kube-controller-manager /opt/kubernetes/bin/

[root@linux-node1 kubernetes]# cp server/bin/kube-scheduler /opt/kubernetes/bin/

1.创建生成CSR的 JSON 配置文件

[root@linux-node1 src]# vim kubernetes-csr.json

{

  "CN": "kubernetes",

  "hosts": [

    "127.0.0.1",

    "192.168.56.11",  #master地址

    "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

 [root@linux-node1 src]# 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

[root@linux-node1 src]# cp kubernetes*.pem /opt/kubernetes/ssl/

[root@linux-node1 ~]# scp kubernetes*.pem 192.168.56.12:/opt/kubernetes/ssl/

[root@linux-node1 ~]# scp kubernetes*.pem 192.168.56.13:/opt/kubernetes/ssl/

3.创建 kube-apiserver 使用的客户端 token 文件

[root@linux-node1 ~]#  head -c 16 /dev/urandom | od -An -t x | tr -d ' '

ad6d5bb607a186796d8861557df0d17f

[root@linux-node1 ~]# vim /opt/kubernetes/ssl/bootstrap-token.csv

ad6d5bb607a186796d8861557df0d17f,kubelet-bootstrap,10001,"system:kubelet-bootstrap"

红色部分。每个人生成的可能不一样。填写自己生成的即可

4.创建基础用户名/密码认证配置

[root@linux-node1 ~]# vim /opt/kubernetes/ssl/basic-auth.csv

admin,admin,1

readonly,readonly,2

5.部署Kubernetes API Server

[root@linux-node1 ~]# 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=192.168.56.11 \

  --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://192.168.56.11:2379,https://192.168.56.12:2379,https://192.168.56.13:2379 \

  --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

[root@linux-node1 ~]# systemctl daemon-reload

[root@linux-node1 ~]# systemctl enable kube-apiserver

[root@linux-node1 ~]# systemctl start kube-apiserver

查看API Server服务状态

[root@linux-node1 ~]# systemctl status kube-apiserver

7.部署Controller Manager服务

[root@linux-node1 ~]# vim /usr/lib/systemd/system/kube-controller-manager.service

Description=Kubernetes Controller Manager

ExecStart=/opt/kubernetes/bin/kube-controller-manager \

  --address=127.0.0.1 \

  --master=http://127.0.0.1:8080 \

  --allocate-node-cidrs=true \

  --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 \

.启动Controller Manager

[root@linux-node1 scripts]# systemctl enable kube-controller-manager

[root@linux-node1 scripts]# systemctl start kube-controller-manager

 查看服务状态

[root@linux-node1 scripts]# systemctl status kube-controller-manager

8.部署Kubernetes Scheduler

[root@linux-node1 ~]# vim /usr/lib/systemd/system/kube-scheduler.service

Description=Kubernetes Scheduler

ExecStart=/opt/kubernetes/bin/kube-scheduler \

启动Kubernetes Scheduler服务

[root@linux-node1 scripts]# systemctl enable kube-scheduler

[root@linux-node1 scripts]# systemctl start kube-scheduler

[root@linux-node1 scripts]# systemctl status kube-scheduler

9.部署kubectl 命令行工具

1.准备二进制命令包

[root@linux-node1 ~]# cd /usr/local/src/kubernetes/client/bin

[root@linux-node1 bin]# cp kubectl /opt/kubernetes/bin/

2.创建 admin 证书签名请求

[root@linux-node1 ~]# cd /usr/local/src/ssl/

[root@linux-node1 ssl]# vim admin-csr.json

  "CN": "admin",

  "hosts": [],

      "O": "system:masters",

3.生成 admin 证书和私钥：

[root@linux-node1 ssl]# cfssl gencert -ca=/opt/kubernetes/ssl/ca.pem \

   -profile=kubernetes admin-csr.json | cfssljson -bare admin

[root@linux-node1 ssl]# ls -l admin*

-rw-r--r-- 1 root root 1009 Mar  5 12:29 admin.csr

-rw-r--r-- 1 root root  229 Mar  5 12:28 admin-csr.json

-rw------- 1 root root 1675 Mar  5 12:29 admin-key.pem

-rw-r--r-- 1 root root 1399 Mar  5 12:29 admin.pem

[root@linux-node1 src]# mv admin*.pem /opt/kubernetes/ssl/

4.设置集群参数

[root@linux-node1 src]# kubectl config set-cluster kubernetes \

   --certificate-authority=/opt/kubernetes/ssl/ca.pem \

   --embed-certs=true \

   --server=https://192.168.56.11:6443

Cluster "kubernetes" set.

5.设置客户端认证参数

[root@linux-node1 src]# kubectl config set-credentials admin \

   --client-certificate=/opt/kubernetes/ssl/admin.pem \

   --client-key=/opt/kubernetes/ssl/admin-key.pem

User "admin" set.

6.设置上下文参数

[root@linux-node1 src]# kubectl config set-context kubernetes \

   --cluster=kubernetes \

   --user=admin

Context "kubernetes" created.

7.设置默认上下文

[root@linux-node1 src]# kubectl config use-context kubernetes

Switched to context "kubernetes".

8.使用kubectl工具

[root@linux-node1 ~]# kubectl get cs

NAME                 STATUS    MESSAGE             ERROR

controller-manager   Healthy   ok                 

scheduler            Healthy   ok                 

etcd-1               Healthy   {"health":"true"}  

etcd-2               Healthy   {"health":"true"}  

etcd-0               Healthy   {"health":"true"}

说明etcd部署成功。