k8s集群之master节点部署

apiserver的部署

    

api-server的部署脚本
[root@mast-1 k8s]# cat apiserver.sh 
#!/bin/bash

MASTER_ADDRESS=$1   主节点IP
ETCD_SERVERS=$2        etcd地址

cat <<EOF >/opt/kubernetes/cfg/kube-apiserver

KUBE_APISERVER_OPTS="--logtostderr=true \
--v=4 \
--etcd-servers=${ETCD_SERVERS} \
--bind-address=${MASTER_ADDRESS} \
--secure-port=6443 \
--advertise-address=${MASTER_ADDRESS} \
--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"

EOF

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

　　下载二进制包

[root@mast-1 k8s]# wget https://dl.k8s.io/v1.10.13/kubernetes-server-linux-amd64.tar.gz

　　解压安装

[root@mast-1 k8s]# tar xf kubernetes-server-linux-amd64.tar.gz 
[root@mast-1 k8s]# cd kubernetes/server/bin/
[root@mast-1 bin]# ls
apiextensions-apiserver              cloud-controller-manager.tar  kube-apiserver             kube-controller-manager             kubectl     kube-proxy.docker_tag  kube-scheduler.docker_tag
cloud-controller-manager             hyperkube                     kube-apiserver.docker_tag  kube-controller-manager.docker_tag  kubelet     kube-proxy.tar         kube-scheduler.tar
cloud-controller-manager.docker_tag  kubeadm                       kube-apiserver.tar         kube-controller-manager.tar         kube-proxy  kube-scheduler         mounter
[root@mast-1 ~]# mkdir /opt/kubernetes/{cfg,ssl,bin} -pv
mkdir: 已创建目录 "/opt/kubernetes"
mkdir: 已创建目录 "/opt/kubernetes/cfg"
mkdir: 已创建目录 "/opt/kubernetes/ssl"
mkdir: 已创建目录 "/opt/kubernetes/bin"
[root@mast-1 bin]# cp kube-apiserver kube-controller-manager kube-scheduler /opt/kubernetes/bin/
[root@mast-1 k8s]# ./apiserver.sh 192.168.10.11 https://192.168.10.11:2379,https://192.168.10.12:2379,https://192.168.10.13:2379
[root@mast-1 k8s]# cd /opt/kubernetes/cfg/
[root@mast-1 cfg]# vi kube-apiserver 
KUBE_APISERVER_OPTS="--logtostderr=false 
--log-dir=/opt/kubernetes/logs     定义日志目录;注意创建此目录
--v=4 
--etcd-servers=https://192.168.10.11:2379,https://192.168.10.12:2379,https://192.168.10.13:2379 
--bind-address=192.168.10.11    绑定的IP地址
--secure-port=6443    端口基于https通信的
--advertise-address=192.168.10.11     集群通告地址；其他节点访问通告这个IP
--allow-privileged=true        容器层的授权
--service-cluster-ip-range=10.0.0.0/24    负责均衡的虚拟IP
--enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,ResourceQuota,NodeRestriction   启用准入插件；决定是否要启用一些高级功能
--authorization-mode=RBAC,Node     认证模式
--kubelet-https=true   api-server主动访问kubelet是使用https协议
--enable-bootstrap-token-auth    认证客户端并实现自动颁发证书
--token-auth-file=/opt/kubernetes/cfg/token.csv       指定token文件
--service-node-port-range=30000-50000    node认证端口范围
--tls-cert-file=/opt/kubernetes/ssl/server.pem     apiserver 证书文件
--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    ca证书
--etcd-cafile=/opt/etcd/ssl/ca.pem    etcd   证书
--etcd-certfile=/opt/etcd/ssl/server.pem 
--etcd-keyfile=/opt/etcd/ssl/server-key.pem"

　　生成证书与token文件

[root@mast-1 k8s]# 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": 2048
    },
    "names": [
        {
            "C": "CN",
            "L": "Beijing",
            "ST": "Beijing",
      	    "O": "k8s",
            "OU": "System"
        }
    ]
}
EOF

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

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

cat > server-csr.json <<EOF
{
    "CN": "kubernetes",
    "hosts": [
      "10.0.0.1",
      "127.0.0.1",
      "10.206.176.19",  master IP
      "10.206.240.188",  LB;node节点不用写，写上也不错
      "10.206.240.189",  LB：
      "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"
        }
    ]
}
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": 2048
  },
  "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": 2048
  },
  "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@mast-1 k8s]# bash k8s-cert.sh 
2019/04/22 18:05:08 [INFO] generating a new CA key and certificate from CSR
2019/04/22 18:05:08 [INFO] generate received request
2019/04/22 18:05:08 [INFO] received CSR
2019/04/22 18:05:08 [INFO] generating key: rsa-2048
2019/04/22 18:05:09 [INFO] encoded CSR
2019/04/22 18:05:09 [INFO] signed certificate with serial number 631400127737303589248201910249856863284562827982
2019/04/22 18:05:09 [INFO] generate received request
2019/04/22 18:05:09 [INFO] received CSR
2019/04/22 18:05:09 [INFO] generating key: rsa-2048
2019/04/22 18:05:10 [INFO] encoded CSR
2019/04/22 18:05:10 [INFO] signed certificate with serial number 99345466047844052770348056449571016254842578399
2019/04/22 18:05:10 [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").
2019/04/22 18:05:10 [INFO] generate received request
2019/04/22 18:05:10 [INFO] received CSR
2019/04/22 18:05:10 [INFO] generating key: rsa-2048
2019/04/22 18:05:11 [INFO] encoded CSR
2019/04/22 18:05:11 [INFO] signed certificate with serial number 309283889504556884051139822527420141544215396891
2019/04/22 18:05:11 [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").
2019/04/22 18:05:11 [INFO] generate received request
2019/04/22 18:05:11 [INFO] received CSR
2019/04/22 18:05:11 [INFO] generating key: rsa-2048
2019/04/22 18:05:11 [INFO] encoded CSR
2019/04/22 18:05:11 [INFO] signed certificate with serial number 286610519064253595846587034459149175950956557113
2019/04/22 18:05:11 [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").
[root@mast-1 k8s]# ls
admin.csr       apiserver.sh    ca-key.pem             etcd-cert.sh  kube-proxy.csr       kubernetes                            scheduler.sh     server.pem
admin-csr.json  ca-config.json  ca.pem                 etcd.sh       kube-proxy-csr.json  kubernetes-server-linux-amd64.tar.gz  server.csr
admin-key.pem   ca.csr          controller-manager.sh  k8s-cert      kube-proxy-key.pem   kubernetes.tar.gz                     server-csr.json
admin.pem       ca-csr.json     etcd-cert              k8s-cert.sh   kube-proxy.pem       master.zip

    

　生成token文件

[root@mast-1 k8s]# cp ca-key.pem ca.pem server-key.pem server.pem /opt/kubernetes/ssl/
[root@mast-1 k8s]#BOOTSTRAP_TOKEN=0fb61c46f8991b718eb38d27b605b008

[root@mast-1 k8s]#cat > token.csv <<EOF
${BOOTSTRAP_TOKEN},kubelet-bootstrap,10001,"system:kubelet-bootstrap"
EOF
[root@mast-1 k8s]# cat token.csv 
0fb61c46f8991b718eb38d27b605b008,kubelet-bootstrap,10001,"system:kubelet-bootstrap"
[root@mast-1 k8s]# mv token.csv  /opt/kubernetes/cfg/

　　

　启动apiserver

[root@mast-1 k8s]# systemctl start kube-apiserver
[root@mast-1 k8s]# ps -ef | grep apiserver
root       3264      1 99 20:35 ?        00:00:01 /opt/kubernetes/bin/kube-apiserver --logtostderr=false --log-dir=/opt/kubernetes/logs --v=4 --etcd-servers=https://192.168.10.11:2379,https:/
/192.168.10.12:2379,https://192.168.10.13:2379 --bind-address=192.168.10.11 --secure-port=6443 --advertise-address=192.168.10.11 --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.pemroot       3274   1397  0 20:35 pts/0    00:00:00 grep --color=auto apiserver

　　生成配置文件并启动controller-manager

[root@mast-1 k8s]# cat controller-manager.sh 
#!/bin/bash

MASTER_ADDRESS=$1

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


KUBE_CONTROLLER_MANAGER_OPTS="--logtostderr=true \   日志配置
--v=4 \
--master=${MASTER_ADDRESS}:8080 \  apimaster端口
--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"

EOF

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@mast-1 k8s]# bash controller-manager.sh 127.0.0.1   输入masterIP
[root@mast-1 k8s]# ss -lntp
State       Recv-Q Send-Q                                                  Local Address:Port                                                                 Peer Address:Port              
LISTEN      0      128                                                     192.168.10.11:6443                                                                            *:*                   
users:(("kube-apiserver",pid=7604,fd=6))LISTEN      0      128                                                     192.168.10.11:2379                                                                            *:*                   
users:(("etcd",pid=1428,fd=7))LISTEN      0      128                                                         127.0.0.1:2379                                                                            *:*                   
users:(("etcd",pid=1428,fd=6))LISTEN      0      128                                                         127.0.0.1:10252                                                                           *:*                   
users:(("kube-controller",pid=7593,fd=3))LISTEN      0      128                                                     192.168.10.11:2380                                                                            *:*                   
users:(("etcd",pid=1428,fd=5))LISTEN      0      128                                                         127.0.0.1:8080                                                                            *:*                   
users:(("kube-apiserver",pid=7604,fd=5))LISTEN      0      128                                                                 *:22                                                                              *:*                   
users:(("sshd",pid=902,fd=3))LISTEN      0      100                                                         127.0.0.1:25                                                                              *:*                   
users:(("master",pid=1102,fd=13))LISTEN      0      128                                                                :::10257                                                                          :::*                   
users:(("kube-controller",pid=7593,fd=5))LISTEN      0      128                                                                :::22                                                                             :::*                   
users:(("sshd",pid=902,fd=4))LISTEN      0      100                                                               ::1:25                                                                             :::*                   
users:(("master",pid=1102,fd=14))

　　生成配置文件，并启动scheduler

[root@mast-1 k8s]# cat scheduler.sh 
#!/bin/bash

MASTER_ADDRESS=$1

cat <<EOF >/opt/kubernetes/cfg/kube-scheduler

KUBE_SCHEDULER_OPTS="--logtostderr=true \
--v=4 \
--master=${MASTER_ADDRESS}:8080 \
--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
[root@mast-1 k8s]# bash scheduler.sh 127.0.0.1
[root@mast-1 k8s]# ss -lntp
State       Recv-Q Send-Q                                                  Local Address:Port                                                                 Peer Address:Port              
LISTEN      0      128                                                     192.168.10.11:2379                                                                            *:*                   
users:(("etcd",pid=1428,fd=7))LISTEN      0      128                                                         127.0.0.1:2379                                                                            *:*                   
users:(("etcd",pid=1428,fd=6))LISTEN      0      128                                                         127.0.0.1:10252                                                                           *:*                   
users:(("kube-controller",pid=7809,fd=3))LISTEN      0      128                                                     192.168.10.11:2380                                                                            *:*                   
users:(("etcd",pid=1428,fd=5))LISTEN      0      128                                                                 *:22                                                                              *:*                   
users:(("sshd",pid=902,fd=3))LISTEN      0      100                                                         127.0.0.1:25                                                                              *:*                   
users:(("master",pid=1102,fd=13))LISTEN      0      128                                                                :::10251                                                                          :::*                   
users:(("kube-scheduler",pid=8073,fd=3))LISTEN      0      128                                                                :::10257                                                                          :::*                   
users:(("kube-controller",pid=7809,fd=5))LISTEN      0      128                                                                :::22                                                                             :::*                   
users:(("sshd",pid=902,fd=4))LISTEN      0      100                                                               ::1:25                                                                             :::*                   
users:(("master",pid=1102,fd=14))

　　配置文件

[root@mast-1 k8s]# cat /opt/kubernetes/cfg/kube-controller-manager 


KUBE_CONTROLLER_MANAGER_OPTS="--logtostderr=true 
--v=4 
--master=127.0.0.1:8080   API连接地址
--leader-elect=true     自动做高可用选举
--address=127.0.0.1     地址，不对外提供服务
--service-cluster-ip-range=10.0.0.0/24   地址范围与apiserver配置一样
--cluster-name=kubernetes     名字
--cluster-signing-cert-file=/opt/kubernetes/ssl/ca.pem 签名
--cluster-signing-key-file=/opt/kubernetes/ssl/ca-key.pem     签名
--root-ca-file=/opt/kubernetes/ssl/ca.pem   根证书
--service-account-private-key-file=/opt/kubernetes/ssl/ca-key.pem   
--experimental-cluster-signing-duration=87600h0m0s"   有效时间

　　配置文件

[root@mast-1 k8s]# cat /opt/kubernetes/cfg/kube-scheduler 

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

　　将客户端工具复制到/usr/bin目录下

[root@mast-1 k8s]# cp kubernetes/server/bin/kubectl /usr/bin/

　　查看集群状态

[root@mast-1 k8s]# kubectl get cs
NAME                 STATUS    MESSAGE             ERROR
scheduler            Healthy   ok                  
etcd-2               Healthy   {"health":"true"}   
etcd-1               Healthy   {"health":"true"}   
etcd-0               Healthy   {"health":"true"}   
controller-manager   Healthy   ok