ETCD 二进制包地址：请添加链接描述

第一步：部署 master

先准备好两个脚本文件：
1、vim etcd-cert.sh
##定义ca证书：
cat > ca-config.json < ca-csr.json < server-csr.json <$WORK_DIR/cfg/etcd
#[Member]
ETCD_NAME="${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},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=${WORK_DIR}/ssl/server.pem \
--key-file=${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@master ~]# mkdir k8s
[root@master ~]# cd k8s/
[root@master k8s]# ls
etcd-cert.sh  etcd.sh
[root@master k8s]# mkdir etcd-cert
[root@master k8s]# mv etcd-cert.sh etcd-cert
[root@master k8s]# ls
etcd-cert  etcd.sh

[root@master k8s]# vim cfssl.sh
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

//下载cfssl官方包：
[root@master k8s]# bash cfssl.sh

[root@master k8s]# ls /usr/local/bin/
cfssl  cfssl-certinfo  cfssljson
//cfssl：生成证书工具；
  cfssl-certinfo：查看证书信息；
  cfssljson：通过传入json文件生成证书

//执行刚刚的脚本：
[root@master etcd-cert]# chmod +x etcd-cert.sh    //授权
[root@master etcd-cert]# ./etcd-cert.sh           //启动

第二步：将下载好的软件包放到 /root/k8s/etcd-cert 目录下

[root@master etcd-cert]# mv *.tar.gz ../
[root@master k8s]# ls
cfssl.sh  etcd-cert  etcd.sh  etcd-v3.3.10-linux-amd64.tar.gz  flannel-v0.10.0-linux-amd64.tar.gz  kubernetes-server-linux-amd64.tar.gz

[root@master k8s]# tar zvxf etcd-v3.3.10-linux-amd64.tar.gz  //解压

[root@master k8s]# ls etcd-v3.3.10-linux-amd64
Documentation  etcd  etcdctl  README-etcdctl.md  README.md  READMEv2-etcdctl.md

//配置文件、命令文件、证书：
[root@master k8s]# mkdir /opt/etcd/{cfg,bin,ssl} -p
[root@master k8s]# mv etcd-v3.3.10-linux-amd64/etcd etcd-v3.3.10-linux-amd64/etcdctl /opt/etcd/bin/

//证书拷贝：
[root@master k8s]# cp etcd-cert/*.pem /opt/etcd/ssl/

//进入卡住状态等待其他节点加入：
[root@master k8s]# bash etcd.sh etcd01 192.168.220.131 etcd02=https://192.168.220.140:2380,etcd03=https://192.168.220.136:2380

//此时，我们可以再开启一个终端，就会发现 etcd进程已经开启：
[root@master ~]# ps -ef | grep etcd

//将证书拷贝到其他节点（提高效率，无需在配置了）
[root@master k8s]# scp -r /opt/etcd/ root@192.168.220.140:/opt/
[root@master k8s]# scp -r /opt/etcd/ root@192.168.220.136:/opt/

//启动脚本拷贝其他节点：
[root@master k8s]# scp /usr/lib/systemd/system/etcd.service root@192.168.220.140:/usr/lib/systemd/system/
[root@master k8s]# scp /usr/lib/systemd/system/etcd.service root@192.168.220.136:/usr/lib/systemd/system/

第三步：部署 node

1、修改 node01：

[root@node01 ~]# vim /opt/etcd/cfg/etcd 
#[Member]
ETCD_NAME="etcd02"
ETCD_DATA_DIR="/var/lib/etcd/default.etcd"
ETCD_LISTEN_PEER_URLS="https://192.168.220.140:2380"
ETCD_LISTEN_CLIENT_URLS="https://192.168.220.140:2379"

#[Clustering]
ETCD_INITIAL_ADVERTISE_PEER_URLS="https://192.168.220.140:2380"
ETCD_ADVERTISE_CLIENT_URLS="https://192.168.220.140:2379"
ETCD_INITIAL_CLUSTER="etcd01=https://192.168.220.131:2380,etcd02=https://192.168.220.140:2380,etcd03=https://192.168.220.136:2380"
ETCD_INITIAL_CLUSTER_TOKEN="etcd-cluster"
ETCD_INITIAL_CLUSTER_STATE="new"

//启动：
[root@node01 ~]# systemctl start etcd.service 
[root@node01 ~]# systemctl status etcd.service 

2、修改 node02：

[root@node02 ~]# vim /opt/etcd/cfg/etcd 
#[Member]
ETCD_NAME="etcd03"
ETCD_DATA_DIR="/var/lib/etcd/default.etcd"
ETCD_LISTEN_PEER_URLS="https://192.168.220.136:2380"
ETCD_LISTEN_CLIENT_URLS="https://192.168.220.136:2379"

#[Clustering]
ETCD_INITIAL_ADVERTISE_PEER_URLS="https://192.168.220.136:2380"
ETCD_ADVERTISE_CLIENT_URLS="https://192.168.220.136:2379"
ETCD_INITIAL_CLUSTER="etcd01=https://192.168.220.131:2380,etcd02=https://192.168.220.140:2380,etcd03=https://192.168.220.136:2380"
ETCD_INITIAL_CLUSTER_TOKEN="etcd-cluster"
ETCD_INITIAL_CLUSTER_STATE="new"

//启动：
[root@node02 ~]# systemctl start etcd.service 
[root@node02 ~]# systemctl status etcd.service 

第四步：检测

在 master 上：

[root@master etcd-cert]# /opt/etcd/bin/etcdctl --ca-file=ca.pem --cert-file=server.pem --key-file=server-key.pem --endpoints="https://192.168.220.131:2379,https://192.168.220.140:2379,https://192.168.220.136:2379" cluster-health

集群状态健康！