k8s集群---apiserver，controller-manager,scheduler部署

#证书自签名脚本
root@k8s-master: ~/k8s/k8s-cert ::
$ cat k8s-cert.sh
cat > ca-config.json <<EOF
{
  "signing": {
    "default": {
      "expiry": "87600h"
    },
    "profiles": {
      "kubernetes": {
         "expiry": "87600h",
         "usages": [
            "signing",
            "key encipherment",
            "server auth",
            "client auth"
        ]
      }
    }
  }
}
EOF

cat > ca-csr.json <<EOF
{
    "CN": "kubernetes",
    "key": {
        "algo": "rsa",
        "size":
    },
    "names": [
        {
            "C": "CN",
            "L": "Beijing",
            "ST": "Beijing",
            "O": "k8s",
            "OU": "System"
        }
    ]
}
EOF

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

#-----------------------
#hosts内容slb节点ip，master节点ip，下边是node节点ip（node节点多写一写冗余IP地址为后续使用）
cat > server-csr.json <<EOF
{
    "CN": "kubernetes",
    "hosts": [
      "10.0.0.1",
      "127.0.0.1",
      "192.168.1.63",
      "192.168.1.64",
      "192.168.1.65",
      "192.168.1.66",
      "192.168.1.60",
      "192.168.1.61",
     "192.168.1.62",
      "kubernetes",
      "kubernetes.default",
      "kubernetes.default.svc",
      "kubernetes.default.svc.cluster",
      "kubernetes.default.svc.cluster.local"
    ],
    "key": {
        "algo": "rsa",
        "size":
    },
    "names": [
        {
            "C": "CN",
            "L": "BeiJing",
            "ST": "BeiJing",
            "O": "k8s",
            "OU": "System"
        }
    ]
}
EOF

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

#-----------------------

cat > admin-csr.json <<EOF
{
  "CN": "admin",
  "hosts": [],
  "key": {
    "algo": "rsa",
    "size":
  },
  "names": [
    {
      "C": "CN",
      "L": "BeiJing",
      "ST": "BeiJing",
      "O": "system:masters",
      "OU": "System"
    }
  ]
}
EOF

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

#-----------------------

cat > kube-proxy-csr.json <<EOF
{
  "CN": "system:kube-proxy",
  "hosts": [],
  "key": {
    "algo": "rsa",
    "size":
  },
  "names": [
    {
      "C": "CN",
      "L": "BeiJing",
      "ST": "BeiJing",
      "O": "k8s",
      "OU": "System"
    }
  ]
}
EOF

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@k8s-master: ~/k8s/k8s-cert ::
$ 

. kube-apiserver
. kube-controller-manager . kube-scheduler
配置文件 -> systemd管理组件 -> 启动

==================================================kube-apiserver==================================================

# 创建 TLS Bootstrapping Token
#BOOTSTRAP_TOKEN=$(head -c 16 /dev/urandom | od -An -t x | tr -d ' ')
BOOTSTRAP_TOKEN=0fb61c46f8991b718eb38d27b605b008

cat > token.csv <<EOF
${BOOTSTRAP_TOKEN},kubelet-bootstrap,10001,"system:kubelet-bootstrap"
EOF
mv token.csv /opt/kubernetes/cfg

，部署kube-apiserver
()创建apiserver的文件存放目录
root@k8s-master: ~/soft ::
$ mkdir /opt/kubernetes/{bin,ssl,cfg} -p

()解压tar包，将核心组件复制到/opt/kubernetes/bin下kube-apiserver，kube-controller-manager，kube-scheduler
root@k8s-master: ~/soft ::
$ tar zxvf kubernetes-server-linux-amd64.tar.gz
root@k8s-master: ~ ::
$ cd /root/soft/kubernetes/server/bin
root@k8s-master: ~/soft/kubernetes/server/bin ::
$ cp kube-apiserver kube-controller-manager kube-scheduler /opt/kubernetes/bin/

()kube-apiserver配置文件脚本
root@k8s-master: ~/k8s ::
$ cat apiserver.sh
#!/bin/bash
#master主机节点ip地址，传入变量
MASTER_ADDRESS=$
#etcd所有节点ip地址
ETCD_SERVERS=$

cat <<EOF >/opt/kubernetes/cfg/kube-apiserver
#true开启日志默认写到/var/log/messages,第二选项flase，并在下边指定log写入目录--logs-dir=/opt/kubernetes/logs
KUBE_APISERVER_OPTS="--logtostderr=true \\
#日志登记，登记越高日志越少
--v= \\
--etcd-servers=${ETCD_SERVERS} \\
--bind-address=${MASTER_ADDRESS} \\
--secure-port= \\
--advertise-address=${MASTER_ADDRESS} \\
--allow-privileged=true \\
#负载均衡节点ip范文，下边是端口
--service-cluster-ip-range=10.0.0.0/ \\
--service-node-port-range=- \\
--enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,ResourceQuota,NodeRestriction \\
--authorization-mode=RBAC,Node \\
--kubelet-https=true \\
#互相通信的token，身份认证标识
--enable-bootstrap-token-auth \\
--token-auth-file=/opt/kubernetes/cfg/token.csv \\
#apiserver的ssl自签名证书
--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 \\
#下边是etcd的ssl自签名证书。因为都是https
--etcd-cafile=/opt/etcd/ssl/ca.pem \\
--etcd-certfile=/opt/etcd/ssl/server.pem \\
--etcd-keyfile=/opt/etcd/ssl/server-key.pem"

EOF

#配置systemctl管理apiserver
cat <<EOF >/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
EOF

systemctl daemon-reload
systemctl enable kube-apiserver
systemctl restart kube-apiserver
root@k8s-master: ~/k8s ::
$ 

()将apiserver自签名证书移动到/opt/kubernetes/ssl
root@k8s-master: /opt/kubernetes/ssl ::
$ pwd
/opt/kubernetes/ssl
root@k8s-master: /opt/kubernetes/ssl ::
$ ls
ca-key.pem  ca.pem  server-key.pem  server.pem
root@k8s-master: /opt/kubernetes/ssl ::
$ 

()复制apiserver自签名证书到/opt/kubernetes/ssl
执行脚本
root@k8s-master: ~/k8s ::
$ ./apiserver.sh 192.168.1.63 https://192.168.1.63:2379,https://192.168.1.65:2379,https://192.168.1.66:2379

()验证apiserver是否启动成功
root@k8s-master: /opt/kubernetes/ssl ::
$ netstat -lntup |grep
tcp               127.0.0.1:          0.0.0.0:*               LISTEN      /kube-apiserver
root@k8s-master: /opt/kubernetes/ssl ::
root@k8s-master: /opt/kubernetes/ssl ::
$ ps -ef|grep kube
root              : ?        :: /opt/kubernetes/bin/kube-apiserver --logtostderr=true --v= --etcd-servers=https://192.168.1.63:2379,https://192.168.1.65:2379,https://192.168.1.66:2379 --bind-address=192.168.1.63 --secure-port=6443 --advertise-address=192.168.1.63 --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
root              : ?        :: /opt/kubernetes/bin/kube-scheduler --logtostderr=true --v= --master=127.0.0.1: --leader-elect
root              : ?        :: /opt/kubernetes/bin/kube-controller-manager --logtostderr=true --v= --master=127.0.0.1: --leader-elect=true --address=127.0.0.1 --service-cluster-ip-range=10.0.0.0/ --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
root           : pts/    :: grep --color=auto kube
root@k8s-master: /opt/kubernetes/ssl ::
$
####报错排查方式
$ source /opt/kubernetes/cfg/kube-apiserver
$ /opt/kubernetes/bin/kube-apiserver $KUBE_APISERVER_OPTS

==================================================kube-controller-manager==================================================

root@k8s-master: ~/k8s ::
$ cat controller-manager.sh
#!/bin/bash
#传参master节点ip地址
MASTER_ADDRESS=$

cat <<EOF >/opt/kubernetes/cfg/kube-controller-manager

KUBE_CONTROLLER_MANAGER_OPTS="--logtostderr=true \\
--v= \\
#master-apiserver运行端口8080所有引用传参变量
--master=${MASTER_ADDRESS}: \\
#选举,自动做高可用
--leader-elect=true \\
#这个服务只在本地运行所以能跟apiserver通信就可以了
--address=127.0.0.1 \\
--service-cluster-ip-range=10.0.0.0/ \\
--cluster-name=kubernetes \\
#颁发证书
--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"

EOF
##使用systemctl管理controller工具
cat <<EOF >/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
EOF

systemctl daemon-reload
systemctl enable kube-controller-manager
systemctl restart kube-controller-manager
root@k8s-master: ~/k8s ::
$ 

==================================================kube-scheduler==================================================

root@k8s-master: ~/k8s ::
$ cat scheduler.sh
#!/bin/bash

MASTER_ADDRESS=$
##scheduler四行，定义日志，指定masterip，自动选举
cat <<EOF >/opt/kubernetes/cfg/kube-scheduler

KUBE_SCHEDULER_OPTS="--logtostderr=true \\
--v= \\
--master=${MASTER_ADDRESS}: \\
--leader-elect"

EOF

cat <<EOF >/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
EOF

systemctl daemon-reload
systemctl enable kube-scheduler
systemctl restart kube-scheduler

==================================================kubectl==================================================
部署完成验证
root@k8s-master: ~/k8s ::
$ cp /root/soft/kubernetes/server/bin/kubectl /usr/bin/
#检查当前集群节点的健康状态
$ kubectl get cs
NAME                 STATUS    MESSAGE             ERROR
scheduler            Healthy   ok
controller-manager   Healthy   ok
etcd-               Healthy   {"health":"true"}
etcd-               Healthy   {"health":"true"}
etcd-               Healthy   {"health":"true"}
root@k8s-master: ~/k8s ::
$ 

###ps：cs为缩写