二进制部署K8s

一、环境需求

      

节点IP	节点名称	所需组件
192.168.248.11	k8s-master	docker、etcd、apiserver、controller-manager、scheduler、kube-proxy、flannel
192.168.248.33	k8s-node1	docker、etcd、Kubelet、kube-proxy
192.168.248.44	k8s-node2	docker、etcd、Kubelet、kube-proxy

二、部署环境

       基础网络环境配置
       根据环境为三台主机配置IP、DNS、网关等基础信息，确保可连通外网；master节点需为6G2核，node节点为2G1核即可。

一、基础配置（三台都做）

1、配置主机名
[root@localhost ~]# hostnamectl set-hostname k8s-master

2、修改hosts文件，添加主机信息
[root@k8s-master ~]# vim /etc/hosts
192.168.248.11 k8s-master 
192.168.248.33 k8s-node1 
192.168.248.44 k8s-node2

3、安装常用服务
[root@k8s-master ~]# yum -y install vim wget net-tools lrzsz telnet lsof rsync unzip

4、关闭防火墙、禁用seLinux
[root@k8s-master ~]# systemctl status firewalld

5、关闭交换分区
[root@k8s-master ~]# swapoff -a
[root@k8s-master ~]# sed -i '/swap/s/^/#/' /etc/fstab

二、Docker环境部署（三台都做）
1、安装依赖包
[root@k8s-master ~]# yum install -y yum-utils device-mapper-persistent-data lvm2

2、添加YUM源
[root@k8s-master ~]# yum-config-manager --add-repo https://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo
[root@k8s-master ~]# wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-7.repo

3、更新YUM源缓存并安装Docker
[root@k8s-master ~]# yum makecache fast
[root@k8s-master ~]# yum -y install docker-ce

4、启动Docker，并设置自启
[root@k8s-master ~]# systemctl start docker && systemctl enable docker

5、配置加速器（推荐阿里云），并重启
[root@k8s-master ~]# vim /etc/docker/daemon.json
{
"registry-mirrors": ["https://hj8von7c.mirror.aliyuncs.com"]
}
[root@k8s-master ~]# systemctl daemon-reload
[root@k8s-master ~]# systemctl restart docker

三、生成通信加密证书
1、生成CA证书
[root@k8s-master ~]# wget https://pkg.cfssl.org/R1.2/cfssl_linux-amd64
[root@k8s-master ~]# wget https://pkg.cfssl.org/R1.2/cfssljson_linux-amd64
[root@k8s-master ~]# wget https://pkg.cfssl.org/R1.2/cfssl-certinfo_linux-amd64
[root@k8s-master ~]# chmod +x cfssl_linux-amd64 cfssljson_linux-amd64 cfssl-certinfo_linux-amd64
[root@k8s-master ~]# mv cfssl_linux-amd64 /usr/local/bin/cfssl
[root@k8s-master ~]# mv cfssljson_linux-amd64 /usr/local/bin/cfssljson
[root@k8s-master ~]# mv cfssl-certinfo_linux-amd64 /usr/local/bin/cfssl-certinfo
[root@k8s-master ~]# mkdir /k8s/kubernetes/{bin,cfg,ssl} -p
[root@k8s-master ~]# cd /k8s/kubernetes/ssl/
[root@k8s-master ssl]# vim ca-config.json
{
    "signing": {
        "default": {
            "expiry": "87600h"
        },
        "profiles": {
            "kubernetes": {
                "expiry": "87600h",
                "usages": [
                    "signing",
                    "key encipherment",
                    "server auth",
                    "client auth"
                ]
            }
        }
    }
}
[root@k8s-master ssl]# vim ca-csr.json
{
  "CN": "kubernetes",
  "key": {
    "algo": "rsa",
    "size": 2048
  },
  "names": [ 
  	  { 
  		  "C": "CN", 
  		  "L": "Beijing", 
  		  "ST": "Beijing",
  		  "O": "k8s", 
  		  "OU": "System"
  	  }
   ]
}

2、执行以下操作，生成 CA 证书。
[root@k8s-master ssl]# cfssl gencert -initca ca-csr.json | cfssljson -bare ca -
2020/03/17 19:56:18 [INFO] generating a new CA key and certificate from CSR 
2020/03/17 19:56:18 [INFO] generate received request 2020/03/17 19:56:18 [INFO] received CSR 
2020/03/17 19:56:18 [INFO] generating key: rsa-2048 
2020/03/17 19:56:19 [INFO] encoded CSR 
2020/03/17 19:56:19 [INFO] signed certificate with serial number 604430133042294594285292977935086938224934188899

3、生成Server证书
[root@k8s-master ssl]# vim server-csr.json
{
   "CN": "kubernetes",
   "hosts": [
      "127.0.0.1",
      "192.168.248.11",
      "192.168.248.33",
      "192.168.248.44",
      "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"
      }
   ]
}
[root@k8s-master ssl]# cfssl gencert -ca=ca.pem -ca-key=ca-key.pem -config=ca-config.json -profile=kubernetes server-csr.json | cfssljson -bare server
[root@k8s-master ssl]# ls
ca-config.json  ca-csr.json  ca.pem  server-csr.json  server.pem  ca.csr  ca-key.pem  server.csr  server-key.pem
[root@k8s-master ssl]# vim admin-csr.json
{
  "CN": "admin",
  "hosts": [],
  "key": {
    "algo": "rsa",
    "size": 2048
  },
  "names": [ 
  	  { 
  		  "C": "CN", 
  		  "L": "Beijing", 
  		  "ST": "Beijing",
  		  "O": "system:masters", 
  		  "OU": "System"
  	  }
   ]
}
[root@k8s-master ssl]# cfssl gencert -ca=ca.pem -ca-key=ca-key.pem -config=ca-config.json -profile=kubernetes admin-csr.json | cfssljson -bare admin
[root@k8s-master ssl]# vim 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"
    }
  ]
}
[root@k8s-master ssl]# 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 ssl]# ls | grep -v pem | xargs -i rm {}

4、下载etcd包至xshell并解压
[root@master ~]# wget https://github.com/etcd-io/etcd/releases/download/v3.3.18/etcd-v3.3.18-linux-amd64.tar.gz
[root@k8s-master ~]# tar zxf etcd-v3.3.18-linux-amd64.tar.gz
[root@k8s-master ~]# cd etcd-v3.3.18-linux-amd64/
[root@k8s-master etcd-v3.3.18-linux-amd64]# cp etcd etcdctl /k8s/kubernetes/bin/

三、配置ETCD集群

一、在k8s-master主机部署Etcd节点
1、创建Etcd配置文件
[root@k8s-master ~]# vim /k8s/kubernetes/cfg/etcd

#[Member] 
ETCD_NAME="etcd01" 
ETCD_DATA_DIR="/data1/etcd" ETCD_LISTEN_PEER_URLS="https://192.168.248.11:2380" ETCD_LISTEN_CLIENT_URLS="https://192.168.248.11:2379" 

#[Clustering] 
ETCD_INITIAL_ADVERTISE_PEER_URLS="https://192.168.248.11:2380" 
ETCD_ADVERTISE_CLIENT_URLS="https://192.168.248.11:2379" ETCD_INITIAL_CLUSTER="etcd01=https://192.168.248.11:2380,etcd02=https://192.168.248.33:2380,etcd03=https://192.168.248.44:2380" 
ETCD_INITIAL_CLUSTER_TOKEN="etcd-cluster" ETCD_INITIAL_CLUSTER_STATE="new"

#[Security]
ETCD_CERT_FILE="/k8s/kubernetes/ssl/server.pem"
ETCD_KEY_FILE="/k8s/kubernetes/ssl/server-key.pem"
ETCD_TRUSTED_CA_FILE="/k8s/kubernetes/ssl/ca.pem"
ETCD_CLIENT_CERT_AUTH="true"
ETCD_PEER_CERT_FILE="/k8s/kubernetes/ssl/server.pem"
ETCD_PEER_KEY_FILE="/k8s/kubernetes/ssl/server-key.pem"
ETCD_PEER_TRUSTED_CA_FILE="/k8s/kubernetes/ssl/ca.pem"
ETCD_PEER_CLIENT_CERT_AUTH="true"

2、创建脚本配置文件
[root@k8s-master ~]# mkdir /data1/etcd -p
[root@k8s-master ~]# vim /usr/lib/systemd/system/etcd.service

[Unit]
Description=Etcd Server
After=network.target
After=network-online.target
Wants=network-online.target

[Service]
Type=notify
EnvironmentFile=/k8s/kubernetes/cfg/etcd
ExecStart=/k8s/kubernetes/bin/etcd \
--name=${ETCD_NAME} \
--data-dir=${ETCD_DATA_DIR} \
--listen-peer-urls=${ETCD_LISTEN_PEER_URLS} \
--listen-client-urls=${ETCD_LISTEN_CLIENT_URLS},http://127.0.0.1:2379 \
--advertise-client-urls=${ETCD_ADVERTISE_CLIENT_URLS} \
--initial-advertise-peer-urls=${ETCD_INITIAL_ADVERTISE_PEER_URLS} \
--initial-cluster=${ETCD_INITIAL_CLUSTER} \
--initial-cluster-token=${ETCD_INITIAL_CLUSTER_TOKEN} \
--initial-cluster-state=new \
--cert-file=/k8s/kubernetes/ssl/server.pem \
--key-file=/k8s/kubernetes/ssl/server-key.pem \
--peer-cert-file=/k8s/kubernetes/ssl/server.pem \
--peer-key-file=/k8s/kubernetes/ssl/server-key.pem \
--trusted-ca-file=/k8s/kubernetes/ssl/ca.pem \
--peer-trusted-ca-file=/k8s/kubernetes/ssl/ca.pem
Restart=on-failure
LimitNOFILE=65536

[Install]
WantedBy=multi-user.target

二、在k8s-node1、k8s-node2主机上部署Etcd节点
1、拷贝Etcd配置文件到计算节点主机，然后修改对应的主机IP地址。

----------node1节点
[root@k8s-node1 ~]# mkdir /k8s/kubernetes/ -p
[root@k8s-node1 ~]# mkdir /data1/etcd -p
[root@k8s-master ~]# rsync -avcz /k8s/kubernetes/* 192.168.248.33:/k8s/kubernetes/
[root@k8s-node1 ~]# vim /k8s/kubernetes/cfg/etcd

#[Member] 
ETCD_NAME="etcd02" 
ETCD_DATA_DIR="/data1/etcd" ETCD_LISTEN_PEER_URLS="https://192.168.248.33:2380" ETCD_LISTEN_CLIENT_URLS="https://192.168.248.33:2379" 
#[Clustering] 
ETCD_INITIAL_ADVERTISE_PEER_URLS="https://192.168.248.33:2380" 
ETCD_ADVERTISE_CLIENT_URLS="https://192.168.248.33:2379" ETCD_INITIAL_CLUSTER="etcd01=https://192.168.248.11:2380,etcd02=https://192.168.248.33:2380,etcd03=https://192.168.248.44:2380" 
ETCD_INITIAL_CLUSTER_TOKEN="etcd-cluster" ETCD_INITIAL_CLUSTER_STATE="new"

#[Security]
ETCD_CERT_FILE="/k8s/kubernetes/ssl/server.pem"
ETCD_KEY_FILE="/k8s/kubernetes/ssl/server-key.pem"
ETCD_TRUSTED_CA_FILE="/k8s/kubernetes/ssl/ca.pem"
ETCD_CLIENT_CERT_AUTH="true"
ETCD_PEER_CERT_FILE="/k8s/kubernetes/ssl/server.pem"
ETCD_PEER_KEY_FILE="/k8s/kubernetes/ssl/server-key.pem"
ETCD_PEER_TRUSTED_CA_FILE="/k8s/kubernetes/ssl/ca.pem"
ETCD_PEER_CLIENT_CERT_AUTH="true"

----------node2节点
[root@k8s-node2 ~]# mkdir /k8s/kubernetes/ -p
[root@k8s-node2 ~]# mkdir /data1/etcd -p
[root@k8s-master ~]# rsync -avcz /k8s/kubernetes/* 192.168.248.44:/k8s/kubernetes/
[root@k8s-node2 ~]# vim /k8s/kubernetes/cfg/etcd

#[Member] 
ETCD_NAME="etcd03" 
ETCD_DATA_DIR="/data1/etcd" 
ETCD_LISTEN_PEER_URLS="https://192.168.248.44:2380" ETCD_LISTEN_CLIENT_URLS="https://192.168.248.44:2379" 
#[Clustering] 
ETCD_INITIAL_ADVERTISE_PEER_URLS="https://192.168.248.44:2380" 
ETCD_ADVERTISE_CLIENT_URLS="https://192.168.248.44:2379" ETCD_INITIAL_CLUSTER="etcd01=https://192.168.248.11:2380,etcd02=https://192.168.248.33:2380,etcd03=https://192.168.248.44:2380" 
ETCD_INITIAL_CLUSTER_TOKEN="etcd-cluster" 
ETCD_INITIAL_CLUSTER_STATE="new"

#[Security]
ETCD_CERT_FILE="/k8s/kubernetes/ssl/server.pem"
ETCD_KEY_FILE="/k8s/kubernetes/ssl/server-key.pem"
ETCD_TRUSTED_CA_FILE="/k8s/kubernetes/ssl/ca.pem"
ETCD_CLIENT_CERT_AUTH="true"
ETCD_PEER_CERT_FILE="/k8s/kubernetes/ssl/server.pem"
ETCD_PEER_KEY_FILE="/k8s/kubernetes/ssl/server-key.pem"
ETCD_PEER_TRUSTED_CA_FILE="/k8s/kubernetes/ssl/ca.pem"
ETCD_PEER_CLIENT_CERT_AUTH="true"

2、将脚本文件拷贝至node节点
[root@k8s-master ~]# scp /usr/lib/systemd/system/etcd.service 192.168.248.33:/usr/lib/systemd/system/
[root@k8s-master ~]# scp /usr/lib/systemd/system/etcd.service 192.168.248.44:/usr/lib/systemd/system/

3、启动Etcd主节点并查看结果
[root@k8s-master ~]# systemctl start etcd
[root@k8s-master ~]# systemctl enable etcd
[root@k8s-master ~]# ps -ef | grep etcd
[root@k8s-node1 ~]# systemctl start etcd 
[root@k8s-node2 ~]# systemctl start etcd 
[root@k8s-node1 ~]# systemctl enable etcd 
[root@k8s-node2 ~]# systemctl enable etcd

三、查看Etcd集群部署状况
---------------------所有节点添加环境变量-----------------------
[root@k8s-master ~]# vim /etc/profile
export PATH=$PATH:/k8s/kubernetes/bin
[root@k8s-master ~]# source /etc/profile

node节点都操作
[root@k8s-node1 ~]# /k8s/kubernetes/bin/etcdctl --ca-file=/k8s/kubernetes/ssl/ca.pem --cert-file=/k8s/kubernetes/ssl/server.pem --key-file=/k8s/kubernetes/ssl/server-key.pem --endpoints="https://192.168.248.100:2379,https://192.168.248.101:2379,https://192.168.248.102:2379" cluster-health
member 51abab151e2684d3 is healthy: got healthy result from https://192.168.248.44:2379 
member 8e0b87d8e3e83fd3 is healthy: got healthy result from https://192.168.248.33:2379 
member a268de79406cdc46 is healthy: got healthy result from https://192.168.248.11:2379 
cluster is healthy			###Etcd部署完成

四、部署flannel网络

1、分配子网段到Etcd
[root@k8s-master ~]# cd /k8s/kubernetes/ssl/
[root@k8s-master ssl]# etcdctl -ca-file=ca.pem --cert-file=server.pem --key-file=server-key.pem --endpoints="https://192.168.248.100:2379,https://192.168.248.101:2379,https://192.168.248.102:2379" set /coreos.com/network/config '{"Network":"172.17.0.0/16","Backend":{"Type":"vxlan"} }'

{"Network":"172.17.0.0/16","Backend":{"Type":"vxlan"} }

2、上传 flannel软件包，解压flannel二进制并分别拷贝到Node节点
[root@k8s-master ssl]# cd
[root@k8s-master ~]# wget https://github.com/coreos/flannel/releases/download/v0.12.0/flannel-v0.12.0-linux-amd64.tar.gz
[root@k8s-master ~]# tar zxf flannel-v0.12.0-linux-amd64.tar.gz 
[root@k8s-master ~]# scp flanneld mk-docker-opts.sh 192.168.248.33:/k8s/kubernetes/bin/ 
[root@k8s-master ~]# scp flanneld mk-docker-opts.sh 192.168.248.44:/k8s/kubernetes/bin/

3、配置flannel文件
--------只在node节点配置
[root@k8s-node1 ~]# vim /k8s/kubernetes/cfg/flanneld

FLANNEL_OPTIONS="--etcd-endpoints=https://192.168.248.11:2379,https://192.168.248.33:2379,https://192.168.248.44:2379 -etcd-cafile=/k8s/kubernetes/ssl/ca.pem -etcd-certfile=/k8s/kubernetes/ssl/server.pem -etcd-keyfile=/k8s/kubernetes/ssl/server-key.pem"

4、在k8s-node1与k8s-node2主机上分别创建flanneld.service脚本文件管理flanneld。
[root@k8s-node1 ~]# vim /usr/lib/systemd/system/flanneld.service

[Unit] 
Description=Flanneld overlay address etcd agent 
After=network-online.target network.target 
Before=docker.service 

[Service] 
Type=notify 
EnvironmentFile=/k8s/kubernetes/cfg/flanneld 
ExecStart=/k8s/kubernetes/bin/flanneld --ip-masq $FLANNEL_OPTIONS 
ExecStartPost=/k8s/kubernetes/bin/mk-docker-opts.sh -k DOCKER_NETWORK_OPTIONS -d /run/flannel/subnet.env 
Restart=on-failure 

[Install] 
WantedBy=multi-user.target

5、在k8s-node1与k8s-node2主机上配置Docker启动指定网段，修改Docker配置脚本文件。
[root@k8s-node1 ~]# vim /usr/lib/systemd/system/docker.service


ExecStart=
EnvironmentFile=/run/flannel/subnet.env
//新添加[Service]块内，目的是让 Docker 网桥分发的 ip 地址与 flanned 网桥在同一个网段 
ExecStart=/usr/bin/dockerd $DOCKER_NETWORK_OPTIONS
//添加$ DOCKER_NETWORK_OPTIONS 变量，替换原来的ExecStart，目的是调用flannel网桥IP地址

6、启动k8s-node1主机上的Flannel服务。
[root@k8s-node1 ~]# systemctl start flanneld  &&  systemctl enable flanneld
[root@k8s-node1 ~]# systemctl daemon-reload  &&  systemctl restart docker

[root@k8s-node1 ~]# ifconfig
docker0:省略...
flannel.1:省略...
//查看 Flannel 是否与 Docker 在同一网段

[root@k8s-node1 ~]# scp /usr/lib/systemd/system/flanneld.service 192.168.248.44:/usr/lib/systemd/system/
[root@k8s-node1 ~]# scp /k8s/kubernetes/cfg/flanneld 192.168.248.44:/k8s/kubernetes/cfg/ 
[root@k8s-node1 ~]# scp /usr/lib/systemd/system/docker.service 192.168.248.44:/usr/lib/systemd/system/

7、在k8s-node2主机上启动flannel服务
[root@k8s-node2 ~]# systemctl start flanneld  &&  systemctl enable flanneld
[root@k8s-node2 ~]# systemctl daemon-reload  &&  systemctl restart docker

[root@k8s-node2 ~]# ip add
docker0:省略...(网桥地址在此)
flannel.1:省略...
//查看 Flannel 是否与 Docker 在同一网段

8、测试flannel是否安装成功
[root@k8s-node2 ~]# ping 172.17.39.1	//该IP为docker网桥地址

五、部署Kubernetes server

1、解压kubernetes文件
[root@k8s-master ~]# wget https://dl.k8s.io/v1.13.1/kubernetes-server-linux-amd64.tar.gz
[root@k8s-master ~]# tar xf kubernetes-server-linux-amd64.tar.gz
[root@k8s-master ~]# cd kubernetes/server/bin/
[root@k8s-master bin]# cp kube-scheduler kube-apiserver kube-controller-manager kubectl /k8s/kubernetes/bin/

2、部署kube-apiserver组件，创建TLS Bootstrapping Token
[root@k8s-master bin]# head -c 16 /dev/urandom | od -An -t x | tr -d ' '
525abc0a4b01ddd3000db61f092980e1
[root@k8s-master bin]# vim /k8s/kubernetes/cfg/token.csv

525abc0a4b01ddd3000db61f092980e1,kubelet-bootstrap,10001,"system:kubelet-bootstrap"

3、创建apiserver配置文件、apiserver systemd文件
[root@k8s-master bin]# vim /k8s/kubernetes/cfg/kube-apiserver

KUBE_APISERVER_OPTS="--logtostderr=true \
--v=4 \
--etcd-servers=https://192.168.248.11:2379,https://192.168.248.33:2379,https://192.168.248.44:2379 \
--bind-address=192.168.248.11 \
--secure-port=6443 \
--advertise-address=192.168.248.11 \
--allow-privileged=true \
--service-cluster-ip-range=10.254.0.0/16 \
--enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,ResourceQuota,NodeRestriction \
--authorization-mode=RBAC,Node \
--enable-bootstrap-token-auth \
--token-auth-file=/k8s/kubernetes/cfg/token.csv \
--service-node-port-range=30000-50000 \
--tls-cert-file=/k8s/kubernetes/ssl/server.pem  \
--tls-private-key-file=/k8s/kubernetes/ssl/server-key.pem \
--client-ca-file=/k8s/kubernetes/ssl/ca.pem \
--service-account-key-file=/k8s/kubernetes/ssl/ca-key.pem \
--etcd-cafile=/k8s/kubernetes/ssl/ca.pem \
--etcd-certfile=/k8s/kubernetes/ssl/server.pem \
--etcd-keyfile=/k8s/kubernetes/ssl/server-key.pem"

[root@k8s-master bin]# vim /usr/lib/systemd/system/kube-apiserver.service
[Unit]
Description=Kubernetes API Server
Documentation=https://github.com/kubernetes/kubernetes

[Service]
EnvironmentFile=-/k8s/kubernetes/cfg/kube-apiserver
ExecStart=/k8s/kubernetes/bin/kube-apiserver $KUBE_APISERVER_OPTS
Restart=on-failure

[Install]
WantedBy=multi-user.target

4、启动kube-apiserver服务并查看状态
[root@k8s-master bin]# systemctl daemon-reload
[root@k8s-master bin]# systemctl enable kube-apiserver
[root@k8s-master bin]# systemctl start kube-apiserver
[root@k8s-master bin]# systemctl status kube-apiserver
[root@k8s-master bin]# ps -ef |grep kube-apiserver
[root@k8s-master bin]# netstat -tulpn |grep kube-apiserve

5、部署kube-scheduler组件，创建kube-scheduler配置文件
[root@k8s-master bin]# vim  /k8s/kubernetes/cfg/kube-scheduler
KUBE_SCHEDULER_OPTS="--logtostderr=true --v=4 --master=127.0.0.1:8080 --leader-elect"
[root@k8s-master bin]# vim /usr/lib/systemd/system/kube-scheduler.service
[Unit]
Description=Kubernetes Scheduler
Documentation=https://github.com/kubernetes/kubernetes

[Service]
EnvironmentFile=-/k8s/kubernetes/cfg/kube-scheduler
ExecStart=/k8s/kubernetes/bin/kube-scheduler $KUBE_SCHEDULER_OPTS
Restart=on-failure

[Install]
WantedBy=multi-user.target

6、启动kube-scheduler服务并查看状态
[root@k8s-master bin]# systemctl daemon-reload
[root@k8s-master bin]# systemctl enable kube-scheduler.service
[root@k8s-master bin]# systemctl start kube-scheduler.service
[root@k8s-master bin]# systemctl status kube-scheduler.service

7、部署kube-controller-manager组件，创建kube-controller-manager配置文件
[root@k8s-master bin]# vim /k8s/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=10.254.0.0/16 \
--cluster-name=kubernetes \
--cluster-signing-cert-file=/k8s/kubernetes/ssl/ca.pem \
--cluster-signing-key-file=/k8s/kubernetes/ssl/ca-key.pem  \
--root-ca-file=/k8s/kubernetes/ssl/ca.pem \
--service-account-private-key-file=/k8s/kubernetes/ssl/ca-key.pem"

[root@k8s-master bin]# vim /usr/lib/systemd/system/kube-controller-manager.service
[Unit]
Description=Kubernetes Controller Manager
Documentation=https://github.com/kubernetes/kubernetes
 
[Service]
EnvironmentFile=-/k8s/kubernetes/cfg/kube-controller-manager
ExecStart=/k8s/kubernetes/bin/kube-controller-manager $KUBE_CONTROLLER_MANAGER_OPTS
Restart=on-failure
 
[Install]
WantedBy=multi-user.target

[root@k8s-master bin]# systemctl daemon-reload
[root@k8s-master bin]# systemctl enable kube-controller-manager
[root@k8s-master bin]# systemctl start kube-controller-manager
[root@k8s-master bin]# systemctl status kube-controller-manager

8、设置环境变量
[root@k8s-master ~]# vim /etc/profile
export PATH=/k8s/kubernetes/bin:$PATH
[root@k8s-master ~]# source /etc/profile

9、查看master服务状态
[root@k8s-master ~]# kubectl get cs,nodes

六、Node节点部署

部署kubelet组件（node节点安装）
1、docker（前面已经部署）
2、安装kubelet二进制文件
[root@k8s-node1 ~]# tar xf kubernetes-node-linux-amd64.tar.gz		-----从电脑F盘包中拉取至shell
[root@k8s-node1 ~]# cd kubernetes/node/bin/
[root@k8s-node1 bin]# cp kube-proxy kubelet kubectl /k8s/kubernetes/bin/

3、复制相关证书到node节点
[root@k8s-master ~]# cd /k8s/kubernetes/ssl/
[root@k8s-master ssl]# scp *.pem 192.168.248.33:$PWD
[root@k8s-master ssl]# scp *.pem 192.168.248.44:$PWD

4、创建kubelet、bootstrap、kubeconfig文件，通过脚本实现
[root@k8s-node1 ~]# vim /k8s/kubernetes/cfg/environment.sh
#!/bin/bash
#创建kubelet bootstrapping kubeconfig 
BOOTSTRAP_TOKEN=525abc0a4b01ddd3000db61f092980e1
KUBE_APISERVER="https://192.168.248.11:6443"
#设置集群参数
kubectl config set-cluster kubernetes \
  --certificate-authority=/k8s/kubernetes/ssl/ca.pem \
  --embed-certs=true \
  --server=${KUBE_APISERVER} \
  --kubeconfig=bootstrap.kubeconfig
#设置客户端认证参数
kubectl config set-credentials kubelet-bootstrap \
  --token=${BOOTSTRAP_TOKEN} \
  --kubeconfig=bootstrap.kubeconfig
# 设置上下文参数
kubectl config set-context default \
  --cluster=kubernetes \
  --user=kubelet-bootstrap \
  --kubeconfig=bootstrap.kubeconfig
# 设置默认上下文
kubectl config use-context default --kubeconfig=bootstrap.kubeconfig
# 创建kube-proxy kubeconfig文件
kubectl config set-cluster kubernetes \
  --certificate-authority=/k8s/kubernetes/ssl/ca.pem \
  --embed-certs=true \
  --server=${KUBE_APISERVER} \
  --kubeconfig=kube-proxy.kubeconfig

kubectl config set-credentials kube-proxy \
  --client-certificate=/k8s/kubernetes/ssl/kube-proxy.pem \
  --client-key=/k8s/kubernetes/ssl/kube-proxy-key.pem \
  --embed-certs=true \
  --kubeconfig=kube-proxy.kubeconfig

kubectl config set-context default \
  --cluster=kubernetes \
  --user=kube-proxy \
  --kubeconfig=kube-proxy.kubeconfig

kubectl config use-context default --kubeconfig=kube-proxy.kubeconfig

5、执行脚本
[root@k8s-node1 ~]# cd /k8s/kubernetes/cfg/
[root@k8s-node1 cfg]# sh environment.sh
Cluster "kubernetes" set.
User "kubelet-bootstrap" set.
Context "default" created.
Switched to context "default".
Cluster "kubernetes" set.
User "kube-proxy" set.
Context "default" created.
Switched to context "default".

6、创建kubelet参数配置模板文件
[root@k8s-node1 ~]# vim /k8s/kubernetes/cfg/kubelet.config
kind: KubeletConfiguration
apiVersion: kubelet.config.k8s.io/v1beta1
address: 192.168.248.33
port: 10250
readOnlyPort: 10255
cgroupDriver: cgroupfs
clusterDNS: ["8.8.8.8"]
clusterDomain: cluster.local.
failSwapOn: false
authentication:
  anonymous:
    enabled: true

7、创建kubelet配置文件
[root@k8s-node1 ~]# vim /k8s/kubernetes/cfg/kubelet
KUBELET_OPTS="--logtostderr=true \
--v=4 \
--hostname-override=192.168.248.33 \
--kubeconfig=/k8s/kubernetes/cfg/kubelet.kubeconfig \
--bootstrap-kubeconfig=/k8s/kubernetes/cfg/bootstrap.kubeconfig \
--config=/k8s/kubernetes/cfg/kubelet.config \
--cert-dir=/k8s/kubernetes/ssl \
--pod-infra-container-image=registry.cn-hangzhou.aliyuncs.com/google-containers/pause-amd64:3.0"

8、创建kubelet systemd文件
[root@k8s-node1 ~]# vim /usr/lib/systemd/system/kubelet.service
[Unit]
Description=Kubernetes Kubelet
After=docker.service
Requires=docker.service

[Service]
EnvironmentFile=/k8s/kubernetes/cfg/kubelet
ExecStart=/k8s/kubernetes/bin/kubelet $KUBELET_OPTS
Restart=on-failure
KillMode=process

[Install]
WantedBy=multi-user.target

9、将kubelet-bootstrap用户绑定到系统集群角色
[root@k8s-master ~]# kubectl create clusterrolebinding kubelet-bootstrap --clusterrole=system:node-bootstrapper --user=kubelet-bootstrap

10、启动服务
[root@k8s-node1 ~]# systemctl daemon-reload
[root@k8s-node1 ~]# systemctl enable kubelet
[root@k8s-node1 ~]# systemctl start kubelet

11、查看csr列表
[root@k8s-master ~]# kubectl get csr
NAME                                                   AGE   REQUESTOR           CONDITION
node-csr-ikgimJ0OD0RyV1O918uIRtIPZ_6SFIY6Mqo3KeNUvME   50s   kubelet-bootstrap   Pending
接收Node
[root@k8s-master ~]# kubectl certificate approve node-csr-ikgimJ0OD0RyV1O918uIRtIPZ_6SFIY6Mqo3KeNUvME

certificatesigningrequest.certificates.k8s.io/node-csr-ikgimJ0OD0RyV1O918uIRtIPZ_6SFIY6Mqo3KeNUvME approved
重新查看csr
[root@k8s-master ~]# kubectl get csr
NAME                                                   AGE   REQUESTOR           CONDITION
node-csr-ikgimJ0OD0RyV1O918uIRtIPZ_6SFIY6Mqo3KeNUvME   3m27s kubelet-bootstrap   Approved,Issued



部署kube-proxy组件（在node节点操作）
[root@k8s-node1 ~]# vim /k8s/kubernetes/cfg/kube-proxy
KUBE_PROXY_OPTS="--logtostderr=true \
--v=4 \
--hostname-override=192.168.248.33 \
--cluster-cidr=0.0.0.0/16 \
--kubeconfig=/k8s/kubernetes/cfg/kube-proxy.kubeconfig"

[root@k8s-node1 ~]# vim /usr/lib/systemd/system/kube-proxy.service
[Unit]
Description=Kubernetes Proxy
After=network.target
 
[Service]
EnvironmentFile=-/k8s/kubernetes/cfg/kube-proxy
ExecStart=/k8s/kubernetes/bin/kube-proxy $KUBE_PROXY_OPTS
Restart=on-failure
 
[Install]
WantedBy=multi-user.target

启动服务
[root@k8s-node1 ~]# systemctl daemon-reload
[root@k8s-node1 ~]# systemctl enable kube-proxy
[root@k8s-node1 ~]# systemctl start kube-proxy

七、查看自动签发证书

[root@k8s-master ~]# kubectl get csr 	//查看请求证书
NAME 			AGE 		REQUESTOR 		CONDITION 
node-csr-BZ3POcwU6NyvCZ2TGzqqaD2uYR1zHbMUjmdNWhjwJgE 45s kubelet-bootstrap Pending 
node-csr-M8rbZpIYMYHtXxbFH9iBtlnQogAvwT7WfyF9V70k3zQ 48s kubelet-bootstrap Pending

[root@k8s-master ~]# kubectl certificate approve node-csr-M8rbZpIYMYHtXxbFH9iBtlnQogAvwT7WfyF9V70k3zQ
// 允许节点加入集群，替换为自己的节点名
[root@k8s-master ~]# kubectl certificate approve node-csr-BZ3POcwU6NyvCZ2TGzqqaD2uYR1zHbMUjmdNWhjwJgE

[root@k8s-master ~]# kubectl get nodes //查看节点是否添加成功 NAME 			STATUS 		ROLES 	   AGE 		VERSION 192.168.0.108   Ready 	     	   21s 	    v1.17.3 192.168.0.109   Ready            12s      v1.17.3

部署完成