手把手带你部署K8s二进制集群

 集群环境准备：

 

【etcd集群证书生成】

#mkdir -p k8s/{k8s-cert,etcd-cert}
#cd k8s/etcd-cert/

#cat > ca-config.json <<EOF
{
  "signing": {
    "default": {
      "expiry": "87600h"
    },
    "profiles": {
      "www": {
         "expiry": "87600h",
         "usages": [
            "signing",
            "key encipherment",
            "server auth",
            "client auth"
        ]
      }
    }
  }
}
EOF

#cat > ca-csr.json <<EOF
{
    "CN": "etcd CA",
    "key": {
        "algo": "rsa",
        "size": 2048
    },
    "names": [
        {
            "C": "CN",
            "L": "Beijing",
            "ST": "Beijing"
        }
    ]
}
EOF

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

#cat > server-csr.json <<EOF
{
    "CN": "etcd",
    "hosts": [
    "192.168.109.100",
    "192.168.109.101",
    "192.168.109.102"
    ],
    "key": {
        "algo": "rsa",
        "size": 2048
    },
    "names": [
        {
            "C": "CN",
            "L": "BeiJing",
            "ST": "BeiJing"
        }
    ]
}
EOF
#cfssl gencert -ca=ca.pem -ca-key=ca-key.pem -config=ca-config.json -profile=www server-csr.json | cfssljson -bare server

[root@#k8s-master etcd-cert]# ls
ca-config.json ca.csr ca-csr.json ca-key.pem ca.pem server.csr server-csr.json server-key.pem server.pem

　Ps:如果在生成证书过程中出现没有cfssl命令时候，需要通过下载安装

curl -L https://pkg.cfssl.org/R1.2/cfssl_linux-amd64 -o /usr/local/bin/cfssl
curl -L https://pkg.cfssl.org/R1.2/cfssljson_linux-amd64 -o /usr/local/bin/cfssljson
curl -L https://pkg.cfssl.org/R1.2/cfssl-certinfo_linux-amd64 -o /usr/local/bin/cfssl-certinfo
chmod +x /usr/local/bin/cfssl /usr/local/bin/cfssljson /usr/local/bin/cfssl-certinfo

【安装etcd节点】

 #tar zvf etcd-v3.3.10-linux-amd64.tar.gz    #将解压的etcd二进制软件包解压到

# cd etcd-v3.3.10-linux-amd64       

#mkdir /opt/etcd/{cfg,bin,ssl} -p      #创建etcd配置配置/启动/证书/文件

[root@k8s-master soft]# mv ./etcd-v3.3.10-linux-amd64/{etcd,etcdctl} /opt/etcd/bin/      #将etcd下解压之后的etcd和etcdctl两个启动文件拷贝到bin目录下

【etcd证书植入到etcd目录】

 [root@k8s-master k8s]# cp  /root/k8s/etcd-cert/{ca*pem,server*pem} /opt/etcd/ssl/    #将在etcd节点生成的证书拷贝到新建的/opt/etcd/ssl中

[root@k8s-master k8s]# vim /opt/etcd/cfg/etcd

#[Member]
ETCD_NAME="etcd01"
ETCD_DATA_DIR="/var/lib/etcd/default.etcd"
ETCD_LISTEN_PEER_URLS="https://192.168.109.100:2380"
ETCD_LISTEN_CLIENT_URLS="https://192.168.109.100:2379"

#[Clustering]
ETCD_INITIAL_ADVERTISE_PEER_URLS="https://192.168.109.100:2380"
ETCD_ADVERTISE_CLIENT_URLS="https://192.168.109.100:2379"
ETCD_INITIAL_CLUSTER="etcd01=https://192.168.109.100:2380,etcd02=https://192.168.109.101:2380,etcd03=https://192.168.109.102:2380"
ETCD_INITIAL_CLUSTER_TOKEN="etcd-cluster"
ETCD_INITIAL_CLUSTER_STATE="new"

参数详解：

ETCD_NAME 节点名称
ETCD_DATA_DIR 数据目录
ETCD_LISTEN_PEER_URLS 集群通信监听地址
ETCD_LISTEN_CLIENT_URLS 客户端访问监听地址
ETCD_INITIAL_ADVERTISE_PEER_URLS 集群通告地址
ETCD_ADVERTISE_CLIENT_URLS 客户端通告地址
ETCD_INITIAL_CLUSTER 集群节点地址
ETCD_INITIAL_CLUSTER_TOKEN 集群Token
ETCD_INITIAL_CLUSTER_STATE 加入集群的当前状态，new是新集群，existing表示加入已有集群

【添加systemd】

#vim  /usr/lib/systemd/system/etcd.service      #配置etcd服务由systemd管理

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

[Service]
Type=notify
EnvironmentFile=/opt/etcd/cfg/etcd
ExecStart=/opt/etcd/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=/opt/etcd/ssl/server.pem
--key-file=/opt/etcd/ssl/server-key.pem
--peer-cert-file=/opt/etcd/ssl/server.pem
--peer-key-file=/opt/etcd/ssl/server-key.pem
--trusted-ca-file=/opt/etcd/ssl/ca.pem
--peer-trusted-ca-file=/opt/etcd/ssl/ca.pem
Restart=on-failure
LimitNOFILE=65536

[Install]
WantedBy=multi-user.target

Ps:配置完毕第一个etcd节点之后，启动一个节点的话，是无法正常启动的，需要保证其它两个节点etcd服务处理监听状态~

将第一个etcd节点的etcd配置文件/证书文件/二进制启动文件/systemd管理的etcd启动文件拷贝到其它节点上去（ps:拷贝到其它节点之后，注意修改etcd配置文件中对应的IP信息）

 [root@k8s-master k8s]# scp -r /opt/etcd/ root@192.168.109.101:/opt/

[root@k8s-master k8s]# scp -r /usr/lib/systemd/system/etcd.service  root@192.168.109.101:/usr/lib/systemd/system/etcd.service

 [root@k8s-master k8s]# scp -r /opt/etcd/ root@192.168.109.102:/opt/

[root@k8s-master k8s]# scp -r /usr/lib/systemd/system/etcd.service  root@192.168.109.102:/usr/lib/systemd/system/etcd.service

#systemctl daemon-reload
#systemctl enable etcd
#systemctl start etcd

 

ETCD集群节点状态检查

[root@k8s-master k8s]# ln -s /opt/etcd/bin/etcdctl  /usr/bin/

[root@k8s-master k8s]# etcdctl --ca-file=/opt/etcd/ssl/ca.pem --cert-file=/opt/etcd/ssl/server.pem --key-file=/opt/etcd/ssl/server-key.pem --endpoints="https://192.168.109.100:2379,https://192.168.109.101:2379,https://192.168.109.102:2379" cluster-health
member 33656cb8c2a8d5e2 is healthy: got healthy result from https://192.168.109.100:2379
member 992a804200dc2b57 is healthy: got healthy result from https://192.168.109.102:2379
member 9e5391bd37c0ab08 is healthy: got healthy result from https://192.168.109.101:2379
cluster is healthy

 【k8s-node1/2节点部署docker】

Docker安装

[root@k8s-node01 ~]# yum install -y yum-utils device-mapper-persistent-data lvm2

[root@k8s-node01 ~]# yum-config-manager --add-repo http://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo

[root@k8s-node01 ~]# yum makecache fast

[root@k8s-node01 ~]#yum -y install docker-ce

 [root@k8s-node01 ~]# curl -sSL https://get.daocloud.io/daotools/set_mirror.sh | sh -s http://f1361db2.m.daocloud.io   #配置docker加速器

【写入分配的子网段到etcd，提供给flanneld使用】

[root@k8s-node1 ~]# etcdctl --ca-file=/opt/etcd/ssl/ca.pem --cert-file=/opt/etcd/ssl/server.pem --key-file=/opt/etcd/ssl/server-key.pem --endpoints="https://192.168.109.100:2379,https://192.168.109.101:2379,https://192.168.109.102:2379" set /coreos.com/network/config '{ "Network": "172.17.0.0/16", "Backend": {"Type": "vxlan"}}'
{ "Network": "172.17.0.0/16", "Backend": {"Type": "vxlan"}}

[root@k8s-node1 ~]# /opt/etcd/bin/etcdctl --ca-file=/opt/etcd/ssl/ca.pem --cert-file=/opt/etcd/ssl/server.pem --key-file=/opt/etcd/ssl/server-key.pem --endpoints="https://192.168.109.100:2379,https://192.168.109.101:2379,https://192.168.109.102:2379" get /coreos.com/network/config
{ "Network": "172.17.0.0/16", "Backend": {"Type": "vxlan"}}

【在所有node节点部署flanneld服务】

https://github.com/coreos/flannel/releases

[root@k8s-node1 k8s]# mkdir -p /opt/kubernetes/{bin,cfg/ssl}

[root@k8s-node1 sort]# tar zxvf flannel-v0.10.0-linux-amd64.tar.gz

[root@k8s-node1 sort]# mv flannel mk-docker-opts.sh  /opt/kubernetes/bin/    #将二进制启动文件拷贝到/opt/kubernetes/bin目录

[root@k8s-node1 ~]# vim /opt/kubernetes/cfg/flanneld      #配置flanneld网络

FLANNEL_OPTIONS="--etcd-endpoints=https://192.168.109.100:2379,https://192.168.109.101:2379,https://192.168.109.102:2379 -etcd-cafile=/opt/etcd/ssl/ca.pem -etcd-certfile=/opt/etcd/ssl/server.pem -etcd-keyfile=/opt/etcd/ssl/server-key.pem"

[root@k8s-node1 ~]# vim /usr/lib/systemd/system/flanneld.service   在node1以及node2节点配置flanned启动脚本，由systemd管理

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

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

[Install]
WantedBy=multi-user.target

　[root@k8s-node1 ~]# vim /usr/lib/systemd/system/docker.service   #重新配置docker服务启动配置文件，整合flanneld网络，为了让docker容器能获取flanneld的网络环境

[Unit]
Description=Docker Application Container Engine
Documentation=https://docs.docker.com
After=network-online.target firewalld.service
Wants=network-online.target

[Service]
Type=notify
EnvironmentFile=/run/flannel/subnet.env
ExecStart=/usr/bin/dockerd $DOCKER_NETWORK_OPTIONS
ExecReload=/bin/kill -s HUP $MAINPID
LimitNOFILE=infinity
LimitNPROC=infinity
LimitCORE=infinity
TimeoutStartSec=0
Delegate=yes
KillMode=process
Restart=on-failure
StartLimitBurst=3
StartLimitInterval=60s

[Install]
WantedBy=multi-user.target　　

将对node1所做的配置复用拷贝到另一个节点

[root@k8s-node1 ~]# scp -r /opt/kubernetes/ root@192.168.109.102:/opt/kubernetes/

[root@k8s-node1 ~]# scp -r /usr/lib/systemd/system/{flanneld.service,docker.service} root@192.168.109.102:/usr/lib/systemd/system/

启动flaneld/docker服务

在node1以及node2节点上启动flanneld以及docker服务，并配置自启动；

# systemctl enable flanneld

 #systemctl restart  flanneld
# systemctl restart docker
# systemctl enable docker

检测是否生效

确保docker和flanneld.1在同一个网段

测试不通节点互通，在当前节点访问另一个node节点docker0 IP

 【Master节点】

https://github.com/kubernetes/kubernetes/releases

[root@k8s-master ~]# mkdir -p /opt/kubernetes/{cfg,bin,ssl}

[root@#hostname-109100 ~]# tar zxvf kubernetes-server-linux-amd64.tar.gz

[root@k8s-master soft]# mv ./kubernetes/server/bin/{kube-apiserver,kube-controller-manager,kube-scheduler,kubectl} /opt/kubernetes/bin/

Master证书的生成

[root@#hostname-109100 k8s-cert]# vim  ca-config.json

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

[root@#hostname-109100 k8s-cert]# vim  ca-csr.json

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

[root@#hostname-109100 k8s-cert]# cfssl gencert -initca ca-csr.json | cfssljson -bare ca -　

[root@#hostname-109100 k8s-cert]#vim   server-csr.json

{
    "CN": "kubernetes",
    "hosts": [
      "10.0.0.1",
      "127.0.0.1",
      "192.168.109.100",
      "192.168.109.101",
      "192.168.109.102",
      "192.168.109.103",
      "192.168.109.104",
      "192.168.109.105",
      "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@#hostname-109100 k8s-cert]# cfssl gencert -ca=ca.pem -ca-key=ca-key.pem -config=ca-config.json -profile=kubernetes server-csr.json | cfssljson -bare server

[root@#hostname-109100 k8s-cert]# 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@#hostname-109100 k8s-cert]# cfssl gencert -ca=ca.pem -ca-key=ca-key.pem -config=ca-config.json -profile=kubernetes admin-csr.json | cfssljson -bare admin

[root@#hostname-109100 k8s-cert]# 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@#hostname-109100 k8s-cert]# 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]# cp /root/k8s/k8s-cert/{ca.pem,ca-key.pem,server.pem,server-key.pem} /opt/kubernetes/ssl/   #将生成的ca.pem，ca.pem, server.pem,server-key.pem四个证书拷贝到创建的/opt/kubernetes/ssl/目录中

[root@#hostname-109100 k8s]# BOOTSTRAP_TOKEN=0fb61c46f8991b718eb38d27b605b008         #自定义tokey变量值

[root@k8s-master k8s]# cat > token.csv <<EOF
> ${BOOTSTRAP_TOKEN},kubelet-bootstrap,10001,"system:kubelet-bootstrap"
> EOF

[root@#hostname-109100 k8s]# cat token.csv
0fb61c46f8991b718eb38d27b605b008,kubelet-bootstrap,10001,"system:kubelet-bootstrap"

[root@#hostname-109100 k8s]# mv token.csv /opt/kubernetes/cfg/     #将token.csv文件拷贝到kubernetes的主目录（cfg）里；

[root@k8s-master k8s]# vim /opt/kubernetes/cfg/kube-apiserver

KUBE_APISERVER_OPTS="--logtostderr=false
--log-dir=/opt/kubernetes/logs
--v=4
--etcd-servers=https://192.168.109.100:2379,https://192.168.109.101:2379,https://192.168.109.102:2379
--bind-address=192.168.109.100
--secure-port=6443
--advertise-address=192.168.109.100
--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"

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

[root@#hostname-109100 ~]# vim  /usr/lib/systemd/system/kube-apiserver.service     #设置systemd管理kube-apiserver服务启动

[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

[root@k8s-master k8s]# systemctl restart kube-apiserver
[root@k8s-master k8s]# systemctl enable kube-apiserver

[root@#hostname-109100 k8s]# vim   /opt/kubernetes/cfg/kube-controller-manager     #配置kube-controller-manager文件

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"

[root@#hostname-109100 k8s]# vim  /usr/lib/systemd/system/kube-controller-manager.service     #配置kube-controller-manager服务启动

[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

[root@#hostname-109100 k8s]# systemctl restart kube-controller-manager
[root@#hostname-109100 k8s]# systemctl enable kube-controller-manager

[root@#hostname-109100 k8s]# vim /opt/kubernetes/cfg/kube-scheduler      #创建schduler配置文件

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

参数详解：

--master   #连接本地的apiserver

--leader-elect   #当该组件启动多个时，自动选举(HA)

[root@k8s-master k8s]# vim /usr/lib/systemd/system/kube-scheduler.service　　#systemd管理scheduler

[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

[root@#hostname-109100 k8s]# systemctl enable kube-scheduler
[root@#hostname-109100 k8s]# systemctl restart kube-scheduler

当所有的组件启动成功之后，通过kubectl工具查看当前集群组件状态；

[root@k8s-master ~]# ln -s /opt/kubernetes/bin/kubectl /usr/bin/

 [root@k8s-master ~]# kubectl get cs    #检查k8s集群状态

[root@k8s-master ~]# cat /opt/kubernetes/cfg/token.csv
0fb61c46f8991b718eb38d27b605b008,kubelet-bootstrap,10001,"system:kubelet-bootstrap"
[root@k8s-master ~]# kubectl create clusterrolebinding kubelet-bootstrap --clusterrole=system:node-bootstrapper --user=kubelet-bootstrap

[root@hostname-109100 k8s]# vim kubeconfig.sh     #由于配置kubeconfig文件步骤较为繁琐，这里给出一个关于kubeconfig脚本，在生成kubernetes证书目录下执行生成kubeconfig文件

BOOTSTRAP_TOKEN=0fb61c46f8991b718eb38d27b605b008
APISERVER=$1
SSL_DIR=$2
export KUBE_APISERVER="https://$APISERVER:6443"
kubectl config set-cluster kubernetes 
  --certificate-authority=$SSL_DIR/ca.pem 
  --embed-certs=true 
  --server=${KUBE_APISERVER} 
  --kubeconfig=bootstrap.kubeconfig
kubectl config set-credentials kubelet-bootstrap 
  --token=${BOOTSTRAP_TOKEN} 
  --kubeconfig=bootstrap.kubeconfig
kubectl config set-context default 
  --cluster=kubernetes 
  --user=kubelet-bootstrap 
  --kubeconfig=bootstrap.kubeconfig
kubectl config use-context default --kubeconfig=bootstrap.kubeconfig
kubectl config set-cluster kubernetes 
  --certificate-authority=$SSL_DIR/ca.pem 
  --embed-certs=true 
  --server=${KUBE_APISERVER} 
  --kubeconfig=kube-proxy.kubeconfig
kubectl config set-credentials kube-proxy 
  --client-certificate=$SSL_DIR/kube-proxy.pem 
  --client-key=$SSL_DIR/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

[root@hostname-109100 k8s]# sh   kubeconfig.sh 192.168.109.100 /root/k8s/k8s-cert/         #指定master主机IP地址后面跟上k8s证书目录；

[root@hostname-109100 k8s]# scp bootstrap.kubeconfig kube-proxy.kubeconfig root@192.168.109.101:/opt/kubernetes/cfg/
[root@hostname-109100 k8s]# scp bootstrap.kubeconfig kube-proxy.kubeconfig root@192.168.109.102:/opt/kubernetes/cfg/

【node节点部署kubelet/kube-proxy组件】

[root@k8s-node1 sort]# tar zxvf kubernetes-server-linux-amd64.tar.gz
[root@k8s-node1 sort]# mv /root/sort/kubernetes/server/bin/{kubelet,kube-proxy} /opt/kubernetes/bin/   #将解压之后二进制文件拷贝到/opt/kubernetes/bin目录下

[root@k8s-node1 ~]# vim /opt/kubernetes/cfg/kubelet

KUBELET_OPTS="--logtostderr=false 
--log-dir=/opt/kubernetes/logs 
--v=4 
--address=192.168.109.101 
--hostname-override=192.168.109.101 
--kubeconfig=/opt/kubernetes/cfg/kubelet.kubeconfig 
--experimental-bootstrap-kubeconfig=/opt/kubernetes/cfg/bootstrap.kubeconfig 
--config=/opt/kubernetes/cfg/kubelet.config 
--cert-dir=/opt/kubernetes/ssl 
--pod-infra-container-image=registry.cn-hangzhou.aliyuncs.com/google-containers/pause-amd64:3.0"

参数说明：

--hostname-override 在集群中显示的主机名
--kubeconfig 指定kubeconfig文件位置，会自动生成
--bootstrap-kubeconfig 指定刚才生成的bootstrap.kubeconfig文件
--cert-dir 颁发证书存放位置
--pod-infra-container-image 管理Pod网络的镜像

　[root@k8s-node01 k8s]# vim   /opt/kubernetes/cfg/kubelet.config

kind: KubeletConfiguration
apiVersion: kubelet.config.k8s.io/v1beta1
address: 192.168.109.101
port: 10250
cgroupDriver: cgroupfs
clusterDNS:
- 10.0.0.2
clusterDomain: cluster.local.
failSwapOn: false

[root@k8s-node1 ~]# vim  /usr/lib/systemd/system/kubelet.service

[Unit]
Description=Kubernetes Kubelet
After=docker.service
Requires=docker.service

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

[Install]
WantedBy=multi-user.target

[root@k8s-node1 ~]# systemctl restart kubelet

[root@k8s-node1 sort]# systemctl enable kubelet

　

[root@k8s-node1 ~]# scp /opt/kubernetes/bin/{kubelet,kube-proxy} root@192.168.109.102:/opt/kubernetes/bin/    #将kubelet二进制文件拷贝到另一个node节点

[root@k8s-node1 ~]# scp /opt/kubernetes/cfg/{kubelet,kubelet.config} root@192.168.109.102:/opt/kubernetes/cfg/   #将kubelet配置文件拷贝到另一个node节点

[root@k8s-node1 k8s]# scp usr/lib/systemd/system/kubelet.service root@192.168.109.102:usr/lib/systemd/system/kubelet.service    #将systemd管理的kubelet文件拷贝到另一个node节点

上述两个node节点kubelet启动没问题之后，接下来在k8s-master节点手动允许node节点加入k8s集群；

[root@k8s-master ~]# kubectl get csr      #检查请求的签名node：

NAME                                                                                        AGE              REQUESTOR                 CONDITION
node-csr-EjFlCMMd_g_yLx8Flhux0OB_I_2HgRD1uVP-lbwgOfc          30m              kubelet-bootstrap             Pending
node-csr-lVtFTCGPMj-K1RmC-EPhqNDdyIuV-E0wN99CApKBxYo     41s               kubelet-bootstrap             Pending

[root@k8s-master ~]# kubectl certificate approve   【请求签名名称NAME】

 【node节点部署kube-proxy组件】

[root@k8s-node1 ~]# vim /opt/kubernetes/cfg/kube-proxy

KUBE_PROXY_OPTS="--logtostderr=false 
--log-dir=/opt/kubernetes/logs 
--v=4 
--hostname-override=192.168.109.101 
--cluster-cidr=10.0.0.0/24 
--proxy-mode=ipvs 
--kubeconfig=/opt/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=-/opt/kubernetes/cfg/kube-proxy
ExecStart=/opt/kubernetes/bin/kube-proxy $KUBE_PROXY_OPTS
Restart=on-failure

[Install]
WantedBy=multi-user.target　　

scp /opt/kubernetes/cfg/kube-proxy root@192.168.109.102:/opt/kubernetes/cfg/
scp /usr/lib/systemd/system/kube-proxy.service root@192.168.109.102:/usr/lib/systemd//system/

systemctl daemon-reload
systemctl enable kube-proxy
systemctl restart kube-proxy

 

到目前为止，整个集群部署完毕，查看集群状态正常！

  

 通过kubectl创建一个nginx容器，并访问，看看集群是否正常！

[root@k8s-master ~]# kubectl run nginx --image=nginx --replicas=3
kubectl run --generator=deployment/apps.v1beta1 is DEPRECATED and will be removed in a future version. Use kubectl create instead.
deployment.apps/nginx created

[root@k8s-master ~]# kubectl expose deployment nginx --port=88 --target-port=80 --type=NodePort
service/nginx exposed

【部署Dashboard】

[root@k8s-master ~]# vim  dashboard-rbac.yaml

apiVersion: v1
kind: ServiceAccount
metadata:
  labels:
    k8s-app: kubernetes-dashboard
    addonmanager.kubernetes.io/mode: Reconcile
  name: kubernetes-dashboard
  namespace: kube-system
---

kind: ClusterRoleBinding
apiVersion: rbac.authorization.k8s.io/v1beta1
metadata:
  name: kubernetes-dashboard-minimal
  namespace: kube-system
  labels:
    k8s-app: kubernetes-dashboard
    addonmanager.kubernetes.io/mode: Reconcile
roleRef:
  apiGroup: rbac.authorization.k8s.io
  kind: ClusterRole
  name: cluster-admin
subjects:
  - kind: ServiceAccount
    name: kubernetes-dashboard
    namespace: kube-system
[root@k8s-master ~]#

[root@k8s-master ~]# vim dashboard-deployment.yaml

apiVersion: apps/v1beta2
kind: Deployment
metadata:
  name: kubernetes-dashboard
  namespace: kube-system
  labels:
    k8s-app: kubernetes-dashboard
    kubernetes.io/cluster-service: "true"
    addonmanager.kubernetes.io/mode: Reconcile
spec:
  selector:
    matchLabels:
      k8s-app: kubernetes-dashboard
  template:
    metadata:
      labels:
        k8s-app: kubernetes-dashboard
      annotations:
        scheduler.alpha.kubernetes.io/critical-pod: ''
    spec:
      serviceAccountName: kubernetes-dashboard
      containers:
      - name: kubernetes-dashboard
        image: registry.cn-hangzhou.aliyuncs.com/kube_containers/kubernetes-dashboard-amd64:v1.8.1
        resources:
          limits:
            cpu: 100m
            memory: 300Mi
          requests:
            cpu: 100m
            memory: 100Mi
        ports:
        - containerPort: 9090
          protocol: TCP
        livenessProbe:
          httpGet:
            scheme: HTTP
            path: /
            port: 9090
          initialDelaySeconds: 30
          timeoutSeconds: 30
      tolerations:
      - key: "CriticalAddonsOnly"
        operator: "Exists"

　　[root@k8s-master ~]# vim  dashboard-service.yaml

apiVersion: v1
kind: Service
metadata:
  name: kubernetes-dashboard
  namespace: kube-system
  labels:
    k8s-app: kubernetes-dashboard
    kubernetes.io/cluster-service: "true"
    addonmanager.kubernetes.io/mode: Reconcile
spec:
  type: NodePort
  selector:
    k8s-app: kubernetes-dashboard
  ports:
  - port: 80
    targetPort: 9090

[root@k8s-master ~]# kubectl apply -f dashboard-rbac.yaml
[root@k8s-master ~]# kubectl apply -f dashboard-deployment.yaml
[root@k8s-master ~]# kubectl apply -f dashboard-service.yaml

浏览器访问：http://192.168.109.102:48343

 END

到这里整个K8S二进制集群部署就告一段落，过程比较复杂，如有问题请在博客下方留言或者加入博客左边的QQ群，入群交流沟通；