部署架构

192.168.125.132 节点1
192.168.125.130 节点2
192.168.125.131 节点3

下载二进制安装包

wget https://github.com/etcd-io/etcd/releases/download/v3.4.9/etcd-v3.4.9-linux-amd64.tar.gz
//解压压缩包
tar -xzvf etcd-v3.4.9-linux-amd64.tar.gz -C /workspace

创建数据存放目录

mkdir -p /var/lib/etcd
//修改目录权限
sudo chmod 777 /var/lib/etcd

创建配置文件

cd /workspace/etcd-3.4.9
sudo vim conf.yml

节点1，添加如下内容：

name: etcd-1
data-dir: /var/lib/etcd
listen-client-urls: http://192.168.125.132:2379,http://127.0.0.1:2379
advertise-client-urls: http://192.168.125.132:2379,http://127.0.0.1:2379
listen-peer-urls: http://192.168.125.132:2380
initial-advertise-peer-urls: http://192.168.125.132:2380
initial-cluster: etcd-1=http://192.168.125.132:2380,etcd-2=http://192.168.125.130:2380,etcd-3=http://192.168.125.131:2380
initial-cluster-token: etcd-cluster-token
initial-cluster-state: new

节点2，添加如下内容：

name: etcd-2
data-dir: /var/lib/etcd
listen-client-urls: http://192.168.125.130:2379,http://127.0.0.1:2379
advertise-client-urls: http://192.168.125.130:2379,http://127.0.0.1:2379
listen-peer-urls: http://192.168.125.130:2380
initial-advertise-peer-urls: http://192.168.125.130:2380
initial-cluster: etcd-1=http://192.168.125.132:2380,etcd-2=http://192.168.125.130:2380,etcd-3=http://192.168.125.131:2380
initial-cluster-token: etcd-cluster-token
initial-cluster-state: new

节点3，添加如下内容：

name: etcd-3
data-dir: /var/lib/etcd
listen-client-urls: http://192.168.125.131:2379,http://127.0.0.1:2379
advertise-client-urls: http://192.168.125.131:2379,http://127.0.0.1:2379
listen-peer-urls: http://192.168.125.131:2380
initial-advertise-peer-urls: http://192.168.125.131:2380
initial-cluster: etcd-1=http://192.168.125.132:2380,etcd-2=http://192.168.125.130:2380,etcd-3=http://192.168.125.131:2380
initial-cluster-token: etcd-cluster-token
initial-cluster-state: new

因为etcd，etcdctl命令会常使用，所以将他们加入到PATH路径中

sudo vim /etc/profile
PATH=$PATH:/workspace/etcd-3.4.9
让配置生效
source /etc/profile

启动etcd

nohup ./etcd --config-file=/workspace/etcd-v3.4.9/conf.yml &

查看集群各个成员信息

./etcdctl member list

报错：

rafthttp: health check for peer 2671fc4823c36223 could not connect: dial tcp 192.168.125.131:2380: i/o timeout
etcd context deadline exceeded
防火墙限制了raft协议，关闭防火墙即可