kube-apiserver：集群的统一入口，各组件协调者，以restful api提供接口服务，所有对象资源的增删改查和监听操作都交给apiserver处理在 提交给etcd存储
kube-controller-manager：处理集群中常规后台任务，一个资源对应一个控制器，而controllermanager就是负责管理这些控制器的
kube-scheduler：根据调度算法为新创建的pod选择一个node节点，可以任意部署也可以部署在同一节点上，也可以部署在不同节点上

在master节点上将master.zip挂载

//进行解压
[root@promote k8s]# unzip master.zip 
Archive:  master.zip
  inflating: apiserver.sh            
  inflating: controller-manager.sh   
  inflating: scheduler.sh   
  [root@promote k8s]# ls
apiserver.sh           etcd-v3.3.10-linux-amd64              master.zip
controller-manager.sh  etcd-v3.3.10-linux-amd64.tar.gz       scheduler.sh
etcd-cert              flannel-v0.10.0-linux-amd64.tar.gz
etcd.sh                kubernetes-server-linux-amd64.tar.gz
///增加权限
[root@promote k8s]# chmod +x controller-manager.sh

///在master上操作，api-server生成证书完成自签

///创建目录
[root@promote k8s]# mkdir k8s-cert
[root@promote k8s]# cd k8s-cert/
///将生成证书的脚本挂载到该目录下
[root@promote k8s-cert]# ls
k8s-cert.sh
vim 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",
      "192.168.175.148",     master1
      "192.168.175.156",     /master2
      "192.168.175.100",     ///vip虚拟地址
      "192.168.175.158",     ///负载均衡master
      "192.168.175.159",      ///负载均衡
      "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
///生成证书
[root@promote k8s-cert]# bash k8s-cert.sh 
[root@promote k8s-cert]# ls
admin.csr       ca.csr       kube-proxy.csr       server-csr.json
admin-csr.json  ca-csr.json  kube-proxy-csr.json  server-key.pem
admin-key.pem   ca-key.pem   kube-proxy-key.pem   server.pem
admin.pem       ca.pem       kube-proxy.pem
ca-config.json  k8s-cert.sh  server.csr
///创建kubernetes工作mulu
[root@promote k8s-cert]# mkdir /opt/kubernetes/{bin,ssl,cfg} -p
///将ca server证书拷贝到工作目录中
[root@promote k8s-cert]# cp ca*pem server*pem /opt/kubernetes/ssl
//解压源码包
[root@promote k8s]# tar zxvf kubernetes-server-linux-amd64.tar.gz 
[root@promote k8s]# ls
apiserver.sh                     flannel-v0.10.0-linux-amd64.tar.gz
controller-manager.sh            k8s-cert
etcd-cert                        kubernetes
etcd.sh                          kubernetes-server-linux-amd64.tar.gz
etcd-v3.3.10-linux-amd64         master.zip
etcd-v3.3.10-linux-amd64.tar.gz  scheduler.sh
//进入刚解压的目录下
[root@promote k8s]# cd kubernetes/server/bin/
[root@promote bin]# ls
apiextensions-apiserver              kube-controller-manager.tar
cloud-controller-manager             kubectl
cloud-controller-manager.docker_tag  kubelet
cloud-controller-manager.tar         kube-proxy
hyperkube                            kube-proxy.docker_tag
kubeadm                              kube-proxy.tar
kube-apiserver                       kube-scheduler
kube-apiserver.docker_tag            kube-scheduler.docker_tag
kube-apiserver.tar                   kube-scheduler.tar
kube-controller-manager              mounter
kube-controller-manager.docker_tag
将执行文件拷贝到/bin目录下
[root@promote bin]# cp kube-apiserver kubectl kube-controller-manager kube-scheduler /opt/kubernetes/bin


//创建一个角色（bootstrap）
可以使用head -c 16 /dev/urandom | od -An -t x | tr -d ' '生成序列号方便使用
[root@promote ~]# vim /opt/kubernetes/cfg/token.csv
20db5c7d39e2e5846a67c9c8aa66bcfa,kubelet-bootstrap,10001,"system:kubelet-bootstrap"
开启apiserver
[root@promote k8s]# bash apiserver.sh 192.168.175.148 https://192.168.175.148:2379,https://192.168.175.149:2379,https://192.168.175.157:2379
Created symlink from /etc/systemd/system/multi-user.target.wants/kube-apiserver.service to /usr/lib/systemd/system/kube-apiserver.service.
///查看进程
[root@promote k8s]# ps aux | grep kube
///查看配置文件
[root@promote k8s]# cat /opt/kubernetes/cfg/kube-apiserver 
查看端口
[root@promote k8s]# netstat -ntap | grep 6443
启动scheduler服务
[root@promote k8s]# ./scheduler.sh 127.0.0.1
启动manager
./controller-manager.sh 127.0.0.1
查看master节点状态
/opt/kubernetes/bin/kubectl get cs