kubernetes单Master集群部署--Master节点部署组件(5)

在部署Kubernetes之前一定要确保etcd、flannel、docker是正常工作的,否则先解决问题再继续。

1、生成apiserver证书

创建CA证书,CA为颁发证书的权威机构,创建认证中心。(权威机构建立)

# cat ca-config.json

{
  "signing": {
    "default": {
      "expiry": "87600h"
    },
    "profiles": {
      "kubernetes": {
         "expiry": "87600h",
         "usages": [
            "signing",
            "key encipherment",
            "server auth",
            "client auth"
        ]
      }
    }
  }
}

 

 证书签名请求:向证书颁发机构(CA)申请证书的材料。(权威机构建立需要的材料)

# cat ca-csr.json

{
    "CN": "kubernetes",
    "key": {
        "algo": "rsa",
        "size": 2048
    },
    "names": [
        {
            "C": "CN",
            "L": "Beijing",
            "ST": "Beijing",
            "O": "k8s",
            "OU": "System"
        }
    ]
}

  

 

# cfssl gencert -initca ca-csr.json | cfssljson -bare ca -

生成ca.pem(ca根证书公钥)和ca-key.pem(ca私钥),任何人向CA机构申请证书时,使用ca.pem根证书签名,使用ca-key.pem私钥加密。

 

生成apiserver证书:

# cat server-csr.json

{
    "CN": "kubernetes",
    "hosts": [
      "10.0.0.1",
      "127.0.0.1",
      "10.11.97.191",
      "10.11.97.192",
      "10.11.97.193",
      "10.11.97.71",
      "10.11.97.181",
      "10.11.97.187",
      "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"
        }
    ]
}

  注意:这里要规划好将来需要加入的Master ServerIP。

cfssl gencert -ca=ca.pem -ca-key=ca-key.pem -config=ca-config.json -profile=kubernetes server-csr.json | cfssljson -bare server

生成kube-proxy证书:

# cat 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"
    }
  ]
}

 

# cfssl gencert -ca=ca.pem -ca-key=ca-key.pem -config=ca-config.json -profile=kubernetes kube-proxy-csr.json | cfssljson -bare kube-proxy

最终生成以下证书文件:

 

2、部署apiserver组件

下载二进制包:https://github.com/kubernetes/kubernetes/blob/master/CHANGELOG-1.12.md
下载这个包(kubernetes-server-linux-amd64.tar.gz)就够了,包含了所需的所有组件。

# mkdir /opt/kubernetes/{bin,cfg,ssl} -p

# tar zxvf kubernetes-server-linux-amd64.tar.gz

# cd kubernetes/server/bin

# cp kube-apiserver kube-scheduler kube-controller-manager kubectl /opt/kubernetes/bin

二进文件从二进制包中解压出来即可。

 

创建token文件,用途后面会讲到:

# cat /opt/kubernetes/cfg/token.csv

674c457d4dcf2eefe4920d7dbb6b0ddc,kubelet-bootstrap,10001,"system:kubelet-bootstrap"

第一列:随机字符串,自己可生成
第二列:用户名
第三列:UID
第四列:用户组

创建apiserver配置文件:

# cat /opt/kubernetes/cfg/kube-apiserver

KUBE_APISERVER_OPTS="--logtostderr=true \
--v=4 \
--etcd-servers=https://10.11.97.191:2379,https://10.11.97.192:2379,https://10.11.97.71:2379 \
--bind-address=10.11.97.191 \
--secure-port=6443 \
--advertise-address=10.11.97.191 \
--allow-privileged=true \
--service-cluster-ip-range=10.0.0.0/24 \
--enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,ResourceQuota,NodeRestriction \
--authorization-mode=RBAC,Node \
--kubelet-https=true \
--enable-bootstrap-token-auth \
--token-auth-file=/opt/kubernetes/cfg/token.csv \
--service-node-port-range=30000-50000 \
--tls-cert-file=/opt/kubernetes/ssl/server.pem  \
--tls-private-key-file=/opt/kubernetes/ssl/server-key.pem \
--client-ca-file=/opt/kubernetes/ssl/ca.pem \
--service-account-key-file=/opt/kubernetes/ssl/ca-key.pem \
--etcd-cafile=/opt/etcd/ssl/ca.pem \
--etcd-certfile=/opt/etcd/ssl/server.pem \
--etcd-keyfile=/opt/etcd/ssl/server-key.pem"

  

配置好前面生成的证书,确保能连接etcd。

参数说明:

  • --logtostderr 启用日志
  • ---v 日志等级
  • --etcd-servers etcd集群地址
  • --bind-address 监听地址
  • --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授权和节点自管理
  • --enable-bootstrap-token-auth 启用TLS bootstrap功能,后面会讲到
  • --token-auth-file token文件
  • --service-node-port-range Service Node类型默认分配端口范围

systemd管理apiserver:

# cat /usr/lib/systemd/system/kube-apiserver.service

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

[Service]
EnvironmentFile=-/opt/kubernetes/cfg/kube-apiserver
ExecStart=/opt/kubernetes/bin/kube-apiserver $KUBE_APISERVER_OPTS
Restart=on-failure

[Install]
WantedBy=multi-user.target

  

启动:

# systemctl daemon-reload

# systemctl enable kube-apiserver

# systemctl restart kube-apiserver

 

3、部署scheduler组件

创建schduler配置文件:

# cat /opt/kubernetes/cfg/kube-scheduler

KUBE_SCHEDULER_OPTS="--logtostderr=true \
--v=4 \
--master=127.0.0.1:8080 \
--leader-elect"

  

参数说明:

  • --master 连接本地apiserver
  • --leader-elect 当该组件启动多个时,自动选举(HA)

systemd管理schduler组件:

 

# cat /usr/lib/systemd/system/kube-scheduler.service

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

[Service]
EnvironmentFile=-/opt/kubernetes/cfg/kube-scheduler
ExecStart=/opt/kubernetes/bin/kube-scheduler $KUBE_SCHEDULER_OPTS
Restart=on-failure

[Install]
WantedBy=multi-user.target

  

启动:

# systemctl daemon-reload

# systemctl enable kube-scheduler

# systemctl restart kube-scheduler

 

4、部署controller-manager组件

创建controller-manager配置文件:

# cat /opt/kubernetes/cfg/kube-controller-manager

 

KUBE_CONTROLLER_MANAGER_OPTS="--logtostderr=true \
--v=4 \
--master=127.0.0.1:8080 \
--leader-elect=true \
--address=127.0.0.1 \
--service-cluster-ip-range=10.0.0.0/24 \
--cluster-name=kubernetes \
--cluster-signing-cert-file=/opt/kubernetes/ssl/ca.pem \
--cluster-signing-key-file=/opt/kubernetes/ssl/ca-key.pem  \
--root-ca-file=/opt/kubernetes/ssl/ca.pem \
--service-account-private-key-file=/opt/kubernetes/ssl/ca-key.pem \
--experimental-cluster-signing-duration=87600h0m0s"

  

systemd管理controller-manager组件:

# cat /usr/lib/systemd/system/kube-controller-manager.service

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

[Service]
EnvironmentFile=-/opt/kubernetes/cfg/kube-controller-manager
ExecStart=/opt/kubernetes/bin/kube-controller-manager $KUBE_CONTROLLER_MANAGER_OPTS
Restart=on-failure

[Install]
WantedBy=multi-user.target

  

启动:

# systemctl daemon-reload

# systemctl enable kube-controller-manager

# systemctl restart kube-controller-manager

所有组件都已经启动成功,通过kubectl工具查看当前集群组件状态:

# /opt/kubernetes/bin/kubectl get cs

如上输出说明组件都正常。

posted @ 2019-08-15 12:59  skyflask  阅读(293)  评论(0编辑  收藏  举报