K8S单master部署一：环境规划、ETCD部署

实验环境规划

概述

使用VMwork虚拟机部署单master双node的小型集群，并且在master和node上都安装etcd来实现etcd集群。

软件采用版本

服务器角色分配

前期注意

所有实验虚拟机均已关闭selinux核心防护功能

建立工作目录用于存放二进制软件包

[root@master ~]# cd /[root@master /]# mkdir k8s

安装ETCD数据库（三节点备份）

master端方面

下载ca证书创建、管理工具cfssl

[root@master k8s]# curl -L https://pkg.cfssl.org/R1.2/cfssl_linux-amd64 -o /usr/local/bin/cfssl[root@master k8s]# curl -L https://pkg.cfssl.org/R1.2/cfssljson_linux-amd64 -o /usr/local/bin/cfssljson[root@master k8s]# curl -L https://pkg.cfssl.org/R1.2/cfssl-certinfo_linux-amd64 -o /usr/local/bin/cfssl-certinfo[root@master k8s]# chmod +x /usr/local/bin/cfssl /usr/local/bin/cfssljson /usr/local/bin/cfssl-certinfo

生成ca证书

//定义ca证书，生成ca证书配置文件[root@master k8s]# cat > ca-config.json < ca-csr.json <

生成etcd各节点之间通信证书

（注意IP地址的变化）

//生成etcd节点之间的通信验证签名//节点地址必须要更改[root@master k8s]# cat > server-csr.json <

配置etcd二进制文件包

//解压安装etcd[root@master k8s]# tar zxf etcd-v3.3.10-linux-amd64.tar.gz//建立存放etcd配置文件、命令、证书的目录[root@master k8s]# mkdir -p /opt/etcd/{cfg,bin,ssl}[root@master k8s]# ls /opt/etcd/bin  cfg  ssl//将etcd中的文件分门别类存放[root@master k8s]# mv etcd-v3.3.10-linux-amd64/etcd /opt/etcd/bin/[root@master k8s]# mv etcd-v3.3.10-linux-amd64/etcdctl /opt/etcd/bin/[root@master k8s]# cp -p *.pem /opt/etcd/ssl///etcd命令文件[root@master k8s]# ls /opt/etcd/bin/etcd  etcdctl//etcd证书[root@master k8s]# ls /opt/etcd/ssl/ca-key.pem  ca.pem  server-key.pem  server.pem

建立etcd配置文件

[root@master k8s]# cat </opt/etcd/cfg/etcd//[Member]ETCD_NAME="etcd01"ETCD_DATA_DIR="/var/lib/etcd/default.etcd"ETCD_LISTEN_PEER_URLS="https://192.168.142.220:2380"ETCD_LISTEN_CLIENT_URLS="https://192.168.142.220:2379"//[Clustering]ETCD_INITIAL_ADVERTISE_PEER_URLS="https://192.168.142.220:2380"ETCD_ADVERTISE_CLIENT_URLS="https://192.168.142.220:2379"ETCD_INITIAL_CLUSTER="etcd01=https://192.168.142.220:2380,etcd02=https://192.168.142.136:2380,etcd03=https://192.168.142.132:2380"ETCD_INITIAL_CLUSTER_TOKEN="etcd-cluster"ETCD_INITIAL_CLUSTER_STATE="new"EOF

建立etcd启动脚本

[root@master k8s]# cat </usr/lib/systemd/system/etcd.service[Unit]Description=Etcd ServerAfter=network.targetAfter=network-online.targetWants=network-online.target[Service]Type=notifyEnvironmentFile=/opt/etcd/cfg/etcdExecStart=/opt/etcd/bin/etcd \--name=etcd01 \--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.pemRestart=on-failureLimitNOFILE=65536[Install]WantedBy=multi-user.targetEOF

推送证书、配置文件、启动脚本至node节点上

//将证书、配置文件推送至其它节点[root@master ~]# scp -r /opt/etcd/ root@192.168.142.136:/opt/[root@master ~]# scp -r /opt/etcd/ root@192.168.142.132:/opt///推送启动脚本[root@master ~]# scp /usr/lib/systemd/system/etcd.service root@192.168.142.136:/usr/lib/systemd/system/[root@master ~]# scp /usr/lib/systemd/system/etcd.service root@192.168.142.132:/usr/lib/systemd/system/

node端方面

更改各node节点收到的配置文件

node1

[root@node1 etcd]# vim /opt/etcd/cfg/etcd//[Member]ETCD_NAME="etcd02"                      //节点名称ETCD_DATA_DIR="/var/lib/etcd/default.etcd"ETCD_LISTEN_PEER_URLS="https://192.168.142.136:2380"               //节点地址ETCD_LISTEN_CLIENT_URLS="https://192.168.142.136:2379"               //节点地址//[Clustering]ETCD_INITIAL_ADVERTISE_PEER_URLS="https://192.168.142.136:2380"               //节点地址ETCD_ADVERTISE_CLIENT_URLS="https://192.168.142.136:2379"               //节点地址

node 2

[root@node2 ~]# vim /opt/etcd/cfg/etcd//[Member]ETCD_NAME="etcd03"ETCD_DATA_DIR="/var/lib/etcd/default.etcd"ETCD_LISTEN_PEER_URLS="https://192.168.142.132:2380"                      //节点名称ETCD_LISTEN_CLIENT_URLS="https://192.168.142.132:2379"                      //节点名称//[Clustering]ETCD_INITIAL_ADVERTISE_PEER_URLS="https://192.168.142.132:2380"                      //节点名称ETCD_ADVERTISE_CLIENT_URLS="https://192.168.142.132:2379"                      //节点名称

所有节点！！！！

开启服务

//各节点关防火墙[root@node1 etcd]# systemctl stop firewalld.service[root@node1 etcd]# setenforce 0[root@node1 etcd]# systemctl disable firewalld.service//开启etcd服务[root@node1 etcd]# systemctl start etcd[root@node1 etcd]# systemctl enable etcd

群集健康检查，查看群集成员

//群集各节点健康检查[root@master ~]# /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://192.168.142.220:2379,https://192.168.142.136:2379,https://192.168.142.132:2379" \cluster-health//查看etcd群集成员[root@master ~]# /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://192.168.142.220:2379,https://192.168.142.136:2379,https://192.168.142.132:2379" member list

未完待续~~~