Kubernetes二进制部署——单master集群部署（1）

Kubernetes二进制部署——单master集群部署（1）

Kubernetes平台环境规划

部署环境

负载均衡Nginx1:192.168.13.128/24Nginx2:192.168.13.129/24Master节点master1:192.168.13.131/24 kube-apiserver kube-controller-manager kube-scheduler etcdmaster2:192.168.13.130/24 kube-apiserver kube-controller-manager kube-scheduler etcdNode节点node1:192.168.13.132/24 kubelet kube-proxy docker flannel etcdnode2:192.168.13.133/24 kubelet kube-proxy docker flannel etcd

Kubernetes单节点部署步骤

1：自签ETCD证书 2：ETCD部署 3：Node安装docker 4：Flannel部署（先写入子网到etcd） -----------master--------------------------- 5：自签APIServer证书 6：部署APIServer组件（token，csv） 7：部署controller-manager（指定apiserver证书）和scheduler组件 -------------node---------------------------------- 8：生成kubeconfig（bootstrap，kubeconfig和kube-proxy.kubeconfig） 9：部署kubelet组件 10：部署kube-proxy组件 ---------------加入群集----------------- 11：kubectl get csr && kubectl certificate approve 允许办法证书，加入群集 12：添加一个node节点 13：查看kubectl get node 节点

一，etcd证书及flannel网络部署

1，在master01中自签ETCD证书

[root@master01 ~]# mkdir k8s [root@master01 ~]# cd k8s/ [root@master01 k8s]# rz -E ##上传etcd脚本 [root@master01 k8s]# ls etcd-cert.sh etcd.sh

vim etcd-cert.sh ##证书创建脚本内容 cat > ca-config.json < ca-csr.json < server-csr.json <

vim etcd.sh ##etcd服务脚本 #!/bin/bash # example: ./etcd.sh etcd01 192.168.1.10 etcd02=https://192.168.1.11:2380,etcd03=https://192.168.1.12:2380 ETCD_NAME=$1 ETCD_IP=$2 ETCD_CLUSTER=$3 WORK_DIR=/opt/etcd cat <$WORK_DIR/cfg/etcd #[Member] ETCD_NAME="${ETCD_NAME}" ETCD_DATA_DIR="/var/lib/etcd/default.etcd" ETCD_LISTEN_PEER_URLS="https://${ETCD_IP}:2380" ETCD_LISTEN_CLIENT_URLS="https://${ETCD_IP}:2379" #[Clustering] ETCD_INITIAL_ADVERTISE_PEER_URLS="https://${ETCD_IP}:2380" ETCD_ADVERTISE_CLIENT_URLS="https://${ETCD_IP}:2379" ETCD_INITIAL_CLUSTER="etcd01=https://${ETCD_IP}:2380,${ETCD_CLUSTER}" ETCD_INITIAL_CLUSTER_TOKEN="etcd-cluster" ETCD_INITIAL_CLUSTER_STATE="new" EOF cat </usr/lib/systemd/system/etcd.service [Unit] Description=Etcd Server After=network.target After=network-online.target Wants=network-online.target [Service] Type=notify EnvironmentFile=${WORK_DIR}/cfg/etcd ExecStart=${WORK_DIR}/bin/etcd \ --name=\${ETCD_NAME} \ --data-dir=\${ETCD_DATA_DIR} \ --listen-peer-urls=\${ETCD_LISTEN_PEER_URLS} \ --listen-client-urls=\${ETCD_LISTEN_CLIENT_URLS},\ --advertise-client-urls=\${ETCD_ADVERTISE_CLIENT_URLS} \ --initial-advertise-peer-urls=\${ETCD_INITIAL_ADVERTISE_PEER_URLS} \ --initial-cluster=\${ETCD_INITIAL_CLUSTER} \ --initial-cluster-token=\${ETCD_INITIAL_CLUSTER_TOKEN} \ --initial-cluster-state=new \ --cert-file=${WORK_DIR}/ssl/server.pem \ --key-file=${WORK_DIR}/ssl/server-key.pem \ --peer-cert-file=${WORK_DIR}/ssl/server.pem \ --peer-key-file=${WORK_DIR}/ssl/server-key.pem \ --trusted-ca-file=${WORK_DIR}/ssl/ca.pem \ --peer-trusted-ca-file=${WORK_DIR}/ssl/ca.pem Restart=on-failure LimitNOFILE=65536 [Install] WantedBy=multi-user.target EOF systemctl daemon-reload systemctl enable etcd systemctl restart etcd

[root@master01 k8s]# mkdir etcd-cert ##创建证书目录 [root@master01 k8s]# mv etcd-cert.sh etcd-cert ##将脚本放到目录中 [root@master01 k8s]# vim cfssl.sh ##工具下载脚本 curl -L -o /usr/local/bin/cfssl curl -L -o /usr/local/bin/cfssljson curl -L -o /usr/local/bin/cfssl-certinfo chmod +x /usr/local/bin/cfssl /usr/local/bin/cfssljson /usr/local/bin/cfssl-certinfo [root@master01 k8s]# bash cfssl.sh ##下载cfssl官方包 [root@master01 k8s]# ls /usr/local/bin/ cfssl cfssl-certinfo cfssljson ##cfssl生成证书工具、cfssljson通过传入json文件生成证书、cfssl-certinfo查看证书信息 [root@master01 k8s]# cd /root/k8s/etcd-cert/ ##切换到证书脚本目录下 [root@master01 etcd-cert]# ls etcd-cert.sh

##定义ca证书 [root@master01 etcd-cert]# cat > ca-config.json <

##实现证书的签名 [root@master01 etcd-cert]# cat > ca-csr.json <

[root@master01 etcd-cert]# ls ca-config.json ca-csr.json etcd-cert.sh [root@master01 etcd-cert]# cfssl gencert -initca ca-csr.json | cfssljson -bare ca - ##生产证书，生成ca-key.pem ca.pem 2020/02/09 18:09:13 [INFO] generating a new CA key and certificate from CSR 2020/02/09 18:09:13 [INFO] generate received request 2020/02/09 18:09:13 [INFO] received CSR 2020/02/09 18:09:13 [INFO] generating key: rsa-2048 2020/02/09 18:09:13 [INFO] encoded CSR 2020/02/09 18:09:13 [INFO] signed certificate with serial number 443437184464842782624738198723332409563005728279 [root@master01 etcd-cert]# ls ca-config.json ca.csr ca-csr.json ca-key.pem ca.pem etcd-cert.sh

##指定etcd三个节点之间的通信验证 [root@master01 etcd-cert]#cat > server-csr.json <

[root@master01 etcd-cert]# cfssl gencert -ca=ca.pem -ca-key=ca-key.pem -config=ca-config.json -profile=server-csr.json | cfssljson -bare server ##生成ETCD证书 server-key.pem server.pem

2，在master01和node节点上部署etcd

[root@master01 etcd-cert]# cd /root/k8s/ [root@master01 k8s]# rz -E ##将源码包放到k8s目录下 [root@master01 k8s]# ls etcd-cert flannel-v0.10.0-linux-amd64.tar.gz etcd.sh kubernetes-server-linux-amd64.tar.gz etcd-v3.3.10-linux-amd64.tar.gz [root@master01 k8s]# tar zxvf etcd-v3.3.10-linux-amd64.tar.gz ##解压 [root@master01 k8s]# cd etcd-v3.3.10-linux-amd64/ [root@master01 etcd-v3.3.10-linux-amd64]# ls Documentation etcd etcdctl README-etcdctl.md README.md READMEv2-etcdctl.md [root@master01 etcd-v3.3.10-linux-amd64]# mkdir /opt/etcd/{cfg,bin,ssl} -p ##创建配置文件，命令文件，证书工作目录 [root@master01 etcd-v3.3.10-linux-amd64]# mv etcd etcdctl /opt/etcd/bin/ ##放置命令 [root@master01 etcd-v3.3.10-linux-amd64]# cd ../etcd-cert/ [root@master01 etcd-cert]# cp *.pem /opt/etcd/ssl/ ##证书拷贝 [root@master01 etcd-cert]# ls /opt/etcd/ssl/ ca-key.pem ca.pem server-key.pem server.pem [root@master01 etcd-cert]# cd ../ [root@master01 k8s]# bash etcd.sh etcd01 192.168.13.131 etcd02=https://192.168.13.132:2380,etcd03=https://192.168.13.133:2380 ##执行etcd.sh服务脚本，进入卡住状态等待其他节点加入 [root@master01 ~]# ps -ef | grep etcd ##使用另外一个会话打开，会发现etcd进程已经开启 [root@master01 ~]# systemctl stop firewalld.service ##关闭防火墙 [root@master01 ~]# setenforce 0 #######node节点的防火墙也需要关闭 [root@node01 ~]# systemctl stop firewalld.service ##关闭防火墙 [root@node01 ~]# setenforce 0 ######### [root@master01 k8s]# scp -r /opt/etcd/ root@192.168.13.132:/opt ##拷贝证书去其他node节点 [root@master01 k8s]# scp -r /opt/etcd/ root@192.168.13.133:/opt ##启动脚本拷贝其他node节点 [root@master01 k8s]# scp /usr/lib/systemd/system/etcd.service root@192.168.13.132:/usr/lib/systemd/system/ [root@master01 k8s]# scp /usr/lib/systemd/system/etcd.service root@192.168.13.133:/usr/lib/systemd/system/ #########修改node01的etcd配置文件######### [root@node01 ~]# vim /opt/etcd/cfg/etcd #[Member] ETCD_NAME="etcd02" ##修改名称 ETCD_DATA_DIR="/var/lib/etcd/default.etcd" ETCD_LISTEN_PEER_URLS=" ##地址 ETCD_LISTEN_CLIENT_URLS=" ##地址修改 #[Clustering] ETCD_INITIAL_ADVERTISE_PEER_URLS=" ##地址修改 ETCD_ADVERTISE_CLIENT_URLS=" ##地址修改 ETCD_INITIAL_CLUSTER="etcd01=https://192.168.13.131:2380,etcd02=https://192.168.13.132:2380,etcd03=https://192.168.13.133:2380" ETCD_INITIAL_CLUSTER_TOKEN="etcd-cluster" ETCD_INITIAL_CLUSTER_STATE="new" #########修改node02的etcd配置文件######### [root@node02 ~]# vim /opt/etcd/cfg/etcd #[Member] ETCD_NAME="etcd03" ##修改名称 ETCD_DATA_DIR="/var/lib/etcd/default.etcd" ETCD_LISTEN_PEER_URLS=" ##修改地址 ETCD_LISTEN_CLIENT_URLS=" ##修改地址 #[Clustering] ETCD_INITIAL_ADVERTISE_PEER_URLS=" ##修改地址 ETCD_ADVERTISE_CLIENT_URLS=" ##修改地址 ETCD_INITIAL_CLUSTER="etcd01=https://192.168.13.131:2380,etcd02=https://192.168.13.132:2380,etcd03=https://192.168.13.133:2380" ETCD_INITIAL_CLUSTER_TOKEN="etcd-cluster" ETCD_INITIAL_CLUSTER_STATE="new" #########在master01上启动脚本等待节点加入######### [root@master01 k8s]# bash etcd.sh etcd01 192.168.13.131 etcd02=https://192.168.13.132:2380,etcd03=https://192.168.13.133:2380 #########在node上启动etcd服务######### [root@node01 ~]# systemctl start etcd.service [root@node02 ~]# systemctl start etcd.service #########在master01上检查群集状态######### [root@master01 k8s]# cd etcd-cert/ ##切换到证书的目录下 [root@master01 etcd-cert]# /opt/etcd/bin/etcdctl --ca-file=ca.pem --cert-file=server.pem --key-file=server-key.pem --endpoints="cluster-health ##检查群集状态 member 76e0a15c7cd72ef7 is healthy: got healthy result from https://192.168.13.133:2379 member cbcfa6e700d4aa11 is healthy: got healthy result from https://192.168.13.132:2379 member e4f560fae6a18df3 is healthy: got healthy result from https://192.168.13.131:2379 cluster is healthy

3，在所有的node节点上安装docker

[root@node01 ~]# yum install -y yum-utils device-mapper-persistent-data lvm2 ##安装依赖包 [root@node01 ~]# yum-config-manager --add-repo https://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo ##设置阿里云镜像源 [root@node01 ~]# yum install -y docker-ce ##安装docker [root@node01 ~]# systemctl start docker.service [root@node01 ~]# systemctl enable docker.service [root@node01 ~]# tee /etc/docker/daemon.json <<-'EOF' ##容器加速 { "registry-mirrors": ["https://3a9s8zx5.mirror.aliyuncs.com"] } EOF [root@node01 ~]# systemctl daemon-reload ##重载 [root@node01 ~]# systemctl restart docker [root@node01 ~]# vim /etc/sysctl.conf net.ipv4.ip_forward=1 ##开启路由转发 [root@node01 ~]# sysctl -p ##重载 [root@node01 ~]# service network restart [root@node01 ~]# systemctl restart docker

4，在所有node上部署flannel网络

[root@master01 etcd-cert]# /opt/etcd/bin/etcdctl --ca-file=ca.pem --cert-file=server.pem --key-file=server-key.pem --endpoints="set /coreos.com/network/config '{ "Network": "172.17.0.0/16", "Backend": {"Type": "vxlan"}}' ##写入分配的子网段到ETCD中，供flannel使用，网络为172.17.0.0 [root@master01 etcd-cert]# /opt/etcd/bin/etcdctl --ca-file=ca.pem --cert-file=server.pem --key-file=server-key.pem --endpoints="get /coreos.com/network/config ##get查看写入的信息 [root@master01 etcd-cert]# cd ../ ##拷贝到所有node节点（只需要部署在node节点即可） [root@master01 k8s]# scp flannel-v0.10.0-linux-amd64.tar.gz root@192.168.13.132:/root [root@master01 k8s]# scp flannel-v0.10.0-linux-amd64.tar.gz root@192.168.13.133:/root #########在所有node节点上部署安装flannel########### [root@node01 ~]# tar zxvf flannel-v0.10.0-linux-amd64.tar.gz ##解压 flanneld mk-docker-opts.sh README.md [root@node01 ~]# mkdir /opt/kubernetes/{cfg,bin,ssl} -p [root@node01 ~]# mv mk-docker-opts.sh flanneld /opt/kubernetes/bin/ [root@node01 ~]# rz -E ##上传flannel脚本文件

vim flannel.sh ##编辑flannel配置文件个启动服务的脚本 #!/bin/bash ETCD_ENDPOINTS=${1:-"http://127.0.0.1:2379"} cat </opt/kubernetes/cfg/flanneld FLANNEL_OPTIONS="--etcd-endpoints=${ETCD_ENDPOINTS} \ -etcd-cafile=/opt/etcd/ssl/ca.pem \ -etcd-certfile=/opt/etcd/ssl/server.pem \ -etcd-keyfile=/opt/etcd/ssl/server-key.pem" EOF cat </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=/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 EOF systemctl daemon-reload systemctl enable flanneld systemctl restart flanneld

[root@node01 ~]# bash flannel.sh https://192.168.13.131:2379,https://192.168.13.132:2379,https://192.168.13.133:2379 ##开启flannel网络功能 [root@node01 ~]# vim /usr/lib/systemd/system/docker.service ##修改服务启动文件 13 # for containers run by docker 14 EnvironmentFile=/run/flannel/subnet.env ##添加此项 15 ExecStart=/usr/bin/dockerd $DOCKER_NETWORK_OPTIONS -H fd:// --containerd=/ru n/containerd/containerd.sock ##引用参数 [root@node01 ~]# cat /run/flannel/subnet.env ##查看子网段信息 DOCKER_OPT_BIP="--bip=172.17.45.1/24" DOCKER_OPT_IPMASQ="--ip-masq=false" DOCKER_OPT_MTU="--mtu=1450" DOCKER_NETWORK_OPTIONS=" --bip=172.17.45.1/24 --ip-masq=false --mtu=1450" [root@node01 ~]# systemctl daemon-reload ##重载docker [root@node01 ~]# systemctl restart docker [root@node01 ~]# ifconfig ##此时docker0网关为172.17.45.1，flannel是虚拟网络 [root@node01 ~]# docker run -it centos:7 /bin/bash ##安装centos7并进入容器 [root@720f2727f307 /]# yum install net-tools -y ##安装网络工具 [root@720f2727f307 /]# ifconfig ##容器的地址为172.17.45.2 ##############node2和node1一样的配置############## ##node2的docker0地址为172.17.1.1 [root@node02 ~]# docker run -it centos:7 /bin/bash ##开启容器并进入容器 [root@c2cfc9af3b9f /]# yum install -y net-tools [root@c2cfc9af3b9f /]# ifconfig ##容器地址为172.17.1.2 [root@c2cfc9af3b9f /]# ping 172.17.45.2 ##测试flannel网络是否互通

二，部署master01节点上 apiserver，kube-controller-manager，kube-scheduler三个组件

1，自签APIServer证书

[root@master01 k8s]# rz -E ##上传master脚本压缩包 [root@master01 k8s]# ls master.zip [root@master01 k8s]# unzip master.zip ##解压 Archive: master.zip inflating: apiserver.sh inflating: controller-manager.sh inflating: scheduler.sh [root@master01 k8s]# chmod +x controller-manager.sh ##给执行权限 [root@master01 k8s]# mkdir k8s-cert ##apiserver自签证书目录 [root@master01 k8s]# cd k8s-cert/ [root@master01 k8s-cert]# rz -E [root@master01 k8s-cert]# ls ##上传k8s证书脚本 k8s-cert.sh

vim k8s-cert.sh ##api证书脚本 cat > ca-config.json < ca-csr.json < server-csr.json < admin-csr.json < kube-proxy-csr.json <

[root@master01 k8s-cert]# bash k8s-cert.sh ##执行脚本 [root@master01 k8s-cert]# ls *pem ##生成8个证书 admin-key.pem ca-key.pem kube-proxy-key.pem server-key.pem admin.pem ca.pem kube-proxy.pem server.pem [root@master01 k8s-cert]# mkdir /opt/kubernetes/{cfg,bin,ssl} -p ##创建工作目录 [root@master01 k8s-cert]# cp ca*pem server*pem /opt/kubernetes/ssl/ ##证书复制到工作目录

2，部署APIServer组件（token，csv）

[root@master01 k8s-cert]# cd .. [root@master01 k8s]# tar zxvf kubernetes-server-linux-amd64.tar.gz ##解压 [root@master01 k8s]# cd kubernetes/server/bin/ ##查看工具 [root@master01 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 [root@master01 bin]# cp kube-apiserver kubectl kube-scheduler kube-controller-manager /opt/kubernetes/bin/ ##将master的组件拷贝到工作目录下 [root@master01 bin]# head -c 16 /dev/urandom | od -An -t x | tr -d ' ' ##随机生成序列号 b555625c736044a609cf020902e773fa [root@master01 bin]# vim /opt/kubernetes/cfg/token.csv ##编辑token角色 b555625c736044a609cf020902e773fa,kubelet-bootstrap,10001,"system:kubelet-bootstrap" ##序列号，用户名，id，角色

vim /root/k8s/apiserver.sh ##查看apiserver脚本 #!/bin/bash MASTER_ADDRESS=$1 ETCD_SERVERS=$2 cat </opt/kubernetes/cfg/kube-apiserver KUBE_APISERVER_OPTS="--logtostderr=true \\ --v=4 \\ --etcd-servers=${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,Res ourceQuota,NodeRestriction \\ --authorization-mode=RBAC,Node \\ --kubelet-\\ --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 </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@master01 bin]# cd /root/k8s/ [root@master01 k8s]# bash apiserver.sh 192.168.13.131 https://192.168.13.131:2379,https://192.168.13.132:2379,https://192.168.13.133:2379 ##开启apiserver前面是本地地址，后面是etcd群集的地址 [root@master01 k8s]# ps aux | grep kube ##检查进程是否启动成功 [root@master01 k8s]# cat /opt/kubernetes/cfg/kube-apiserver ##查看配置文件 [root@master01 k8s]# netstat -ntap | grep 6443 ##查看https的端口 tcp 0 0 192.168.13.131:6443 0.0.0.0:* LISTEN 38191/kube-apiserve tcp 0 0 192.168.13.131:6443 192.168.13.131:34900 ESTABLISHED 38191/kube-apiserve tcp 0 0 192.168.13.131:34900 192.168.13.131:6443 ESTABLISHED 38191/kube-apiserve [root@master01 k8s]# netstat -ntap | grep 8080 ##查看8080端口 tcp 0 0 127.0.0.1:8080 0.0.0.0:* LISTEN 38191/kube-apiserve

3，部署controller-manager（指定apiserver证书）和scheduler组件

vim scheduler.sh ##调度的脚本 #!/bin/bash MASTER_ADDRESS=$1 cat </opt/kubernetes/cfg/kube-scheduler KUBE_SCHEDULER_OPTS="--logtostderr=true \\ --v=4 \\ --master=${MASTER_ADDRESS}:8080 \\ --leader-elect" EOF cat </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@master01 k8s]# ./scheduler.sh 127.0.0.1 ##开启scheduler服务

vim controller-manager.sh ##控制管理脚本 #!/bin/bash MASTER_ADDRESS=$1 cat </opt/kubernetes/cfg/kube-controller-manager KUBE_CONTROLLER_MANAGER_OPTS="--logtostderr=true \\ --v=4 \\ --master=${MASTER_ADDRESS}: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" EOF cat </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@master01 k8s]# ./controller-manager.sh 127.0.0.1 ##启动controller-manager [root@master01 k8s]# /opt/kubernetes/bin/kubectl get cs ##查看master 节点状态 NAME STATUS MESSAGE ERROR scheduler Healthy ok controller-manager Healthy ok etcd-2 Healthy {"health":"true"} etcd-0 Healthy {"health":"true"} etcd-1 Healthy {"health":"true"}

三，部署node节点上kubelet kube-proxy组件

1，生成kubeconfig（bootstrap，kubeconfig和kube-proxy.kubeconfig）

##在master01上操作 [root@master01 k8s]# cd kubernetes/server/bin/ ##把 kubelet、kube-proxy拷贝到node节点上去 [root@master01 bin]# scp kubelet kube-proxy root@192.168.13.132:/opt/kubernetes/bin/ [root@master01 bin]# scp kubelet kube-proxy root@192.168.13.133:/opt/kubernetes/bin/ ##在node节点上操作 [root@node01 ~]# rz -E ##上传node脚本压缩包 [root@node01 ~]# unzip node.zip ##解压 Archive: node.zip inflating: proxy.sh inflating: kubelet.sh ##在master01上操作 [root@master01 bin]# cd /root/k8s/ [root@master01 k8s]# mkdir kubeconfig ##创建目录 [root@master01 k8s]# cd kubeconfig/ [root@master01 kubeconfig]# rz -E ##上传kubeconfig脚本 [root@master01 kubeconfig]# ls kubeconfig.sh [root@master01 kubeconfig]# cat /opt/kubernetes/cfg/token.csv b555625c736044a609cf020902e773fa,kubelet-bootstrap,10001,"system:kubelet-bootstrap" ##复制序列号进行脚本修改

vim kubeconfig.sh ##脚本信息 ##token部分要删除 APISERVER=$1 SSL_DIR=$2 # 创建kubelet bootstrapping kubeconfig export KUBE_APISERVER="https://$APISERVER:6443" # 设置集群参数 kubectl config set-cluster kubernetes \ --certificate-authority=$SSL_DIR/ca.pem \ --embed-certs=true \ --server=${KUBE_APISERVER} \ --kubeconfig=bootstrap.kubeconfig # 设置客户端认证参数 kubectl config set-credentials kubelet-bootstrap \ --token=b555625c736044a609cf020902e773fa \ ##修改序列号 --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=$SSL_DIR/ca.pem \ --embed-certs=true \ --server=${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@master01 kubeconfig]# vim /etc/profile ##修改环境变量 export PATH=$PATH:/opt/kubernetes/bin/ [root@master01 kubeconfig]# source /etc/profile ##刷新配置文件 [root@master01 kubeconfig]# bash kubeconfig 192.168.13.131 /root/k8s/k8s-cert/ ##生成配置文件 [root@master01 kubeconfig]# ls bootstrap.kubeconfig kubeconfig kube-proxy.kubeconfig [root@master01 kubeconfig]# scp bootstrap.kubeconfig kube-proxy.kubeconfig root@192.168.13.132:/opt/kubernetes/cfg/ ##拷贝配置文件到node节点 [root@master01 kubeconfig]# scp bootstrap.kubeconfig kube-proxy.kubeconfig root@192.168.13.133:/opt/kubernetes/cfg/ [root@master01 kubeconfig]# kubectl create clusterrolebinding kubelet-bootstrap --clusterrole=system:node-bootstrapper --user=kubelet-bootstrap ##创建bootstrap角色赋予权限用于连接apiserver请求签名（关键）

2，部署kubelet组件

#####在node01上操作####### vim kubelet.sh 脚本信息 #!/bin/bash NODE_ADDRESS=$1 DNS_SERVER_IP=${2:-"10.0.0.2"} cat </opt/kubernetes/cfg/kubelet KUBELET_OPTS="--logtostderr=true \\ --v=4 \\ --hostname-override=${NODE_ADDRESS} \\ --kubeconfig=/opt/kubernetes/cfg/kubelet.kubeconfig \\ --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" EOF cat </opt/kubernetes/cfg/kubelet.config kind: KubeletConfiguration apiVersion: kubelet.config.k8s.io/v1beta1 address: ${NODE_ADDRESS} port: 10250 readOnlyPort: 10255 cgroupDriver: cgroupfs clusterDNS: - ${DNS_SERVER_IP} clusterDomain: cluster.local. failSwapOn: false authentication: anonymous: enabled: true EOF cat </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 EOF systemctl daemon-reload systemctl enable kubelet systemctl restart kubelet

[root@node01 ~]# bash kubelet.sh 192.168.13.132 ##执行脚本 [root@node01 ~]# ps aux | grep kube ##查看服务启动状态 ##########在master01上操作############ [root@master01 kubeconfig]# kubectl get csr ##查看证书状态 NAME AGE REQUESTOR CONDITION node-csr-PvqJh9Nza5SyPUakuwOkiMUsh7zo3ZG9vw3OTNtlkgg 73s kubelet-bootstrap Pending ##等待集群给该节点颁发证书 [root@master01 kubeconfig]# kubectl certificate approve node-csr-PvqJh9Nza5SyPUakuwOkiMUsh7zo3ZG9vw3OTNtlkgg [root@master01 kubeconfig]# kubectl get csr ##查看证书状态 NAME AGE REQUESTOR CONDITION node-csr-PvqJh9Nza5SyPUakuwOkiMUsh7zo3ZG9vw3OTNtlkgg 3m34s kubelet-bootstrap Approved,Issued ##已经被允许加入群集 [root@master01 kubeconfig]# kubectl get node ##查看群集节点，成功加入node01节点 NAME STATUS ROLES AGE VERSION 192.168.13.132 Ready 115s v1.12.3

3，部署kube-proxy组件

vim proxy.sh ##proxy脚本 #!/bin/bash NODE_ADDRESS=$1 cat </opt/kubernetes/cfg/kube-proxy KUBE_PROXY_OPTS="--logtostderr=true \\ --v=4 \\ --hostname-override=${NODE_ADDRESS} \\ --cluster-cidr=10.0.0.0/24 \\ --proxy-mode=ipvs \\ --kubeconfig=/opt/kubernetes/cfg/kube-proxy.kubeconfig" EOF cat </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 EOF systemctl daemon-reload systemctl enable kube-proxy systemctl restart kube-proxy

##在node01节点操作 [root@node01 ~]# bash proxy.sh 192.168.13.132 ##启动proxy服务 [root@node01 ~]# systemctl status kube-proxy.service ##查看服务状态

4，部署node02节点

##在node01上操作 [root@node01 ~]# scp -r /opt/kubernetes/ root@192.168.13.133:/opt/ //把现成的/opt/kubernetes目录复制到其他节点进行修改即可 [root@node01 ~]# scp /usr/lib/systemd/system/{kubelet,kube-proxy}.service root@192.168.13.133:/usr/lib/systemd/system/ //把kubelet，kube-proxy的service文件拷贝到node2中 ##在node02上操作，进行修改 [root@node02 ~]# cd /opt/kubernetes/ssl/ ##切换到证书目录下 [root@node02 ssl]# ls kubelet-client-2020-02-10-00-10-11.pem kubelet.crt kubelet-client-current.pem kubelet.key [root@node02 ssl]# rm -rf * ##首先删除复制过来的证书，等会node02会自行申请证书 [root@node02 ssl]# cd ../cfg/ ##修改配置文件kubelet kubelet.config kube-proxy（三个配置文件） [root@node02 cfg]# vim kubelet --hostname-override=192.168.13.133 \ ##修改地址 [root@node02 cfg]# vim kubelet.config address: 192.168.13.133 ##修改地址 [root@node02 cfg]# vim kube-proxy --hostname-override=192.168.13.133 \ ##修改地址 [root@node02 cfg]# systemctl start kubelet.service ##启动kubelet服务 [root@node02 cfg]# systemctl enable kubelet.service [root@node02 cfg]# systemctl start kube-proxy.service ##启动kube-proxy服务 [root@node02 cfg]# systemctl enable kube-proxy.service

四，加入群集

##在master01上操作 [root@master01 k8s]# kubectl get csr ##查看请求 NAME AGE REQUESTOR CONDITION node-csr-PvqJh9Nza5SyPUakuwOkiMUsh7zo3ZG9vw3OTNtlkgg 23m kubelet-bootstrap Approved,Issued node-csr-qE6kNPzFp6dducllhsQucd-3PJQA5t7eVf-xNkx48MA 103s kubelet-bootstrap Pending [root@master01 k8s]# kubectl certificate approve node-csr-qE6kNPzFp6dducllhsQucd-3PJQA5t7eVf-xNkx48MA //授权许可加入群集 [root@master01 k8s]# kubectl get node ##查看群集中的节点 NAME STATUS ROLES AGE VERSION 192.168.13.132 Ready 21m v1.12.3 192.168.13.133 Ready 70s v1.12.3

单节点部署完毕，未完待续...

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