etcd_install

网络规划

#关闭防火墙
sudo systemctl stop firewalld && sudo systemctl disable firewalld;

1. 虚拟机3台：

• ip: 10.0.0.30-32
• 主机名: p8-etcd-node01-master, p8-etcd-node02-slave01, p8-etcd-node03-slave02
• 命令:

vi /etc/sysconfig/network-scripts/ifcfg-ens33
hostnamectl set-hostname p8-etcd-node01-master && hostname p8-etcd-node01-master;

2. 安装：

• 在线安装:

#安装
yum install -y etcd
#验证
rpm -qa etcd
#etcd-3.3.11-2.el7.centos.x86_64
etcdctl -v
#etcdctl version: 3.3.11
#API version: 2

• 离线安装:

3. 配置文件修改(每台localhost配置为自己的ip)

cp /etc/etcd/etcd.conf /etc/etcd/etcd.conf.bak
vi /etc/etcd/etcd.conf 
# 打开 ETCD_LISTEN_PEER_URLS 和 ETCD_INITIAL_ADVERTISE_PEER_URLS 的注释
# 将 localhost 替换成本机 ip; 增加127.0.0.1访问权限
ETCD_LISTEN_PEER_URLS="http://10.0.0.30:2380"
#无127.0.0.1:2379会报本机没有访问2379端口的权限
ETCD_LISTEN_CLIENT_URLS="http://10.0.0.30:2379,http://127.0.0.1:2379"

ETCD_INITIAL_ADVERTISE_PEER_URLS="http://10.0.0.30:2380"
ETCD_ADVERTISE_CLIENT_URLS="http://10.0.0.30:2379"

# ETCD_NAME 的值对应配置为 Master,  Node02,  Node03
ETCD_NAME="Master"

# 集群配置注释打开, default改为 ETCD_NAME 配置的值, 使用逗号分隔
ETCD_INITIAL_CLUSTER="Master=http://10.0.0.30:2380,Node02=http://10.0.0.31:2380,Node03=http://10.0.0.32:2380"
ETCD_INITIAL_CLUSTER_TOKEN="etcd-cluster"
ETCD_INITIAL_CLUSTER_STATE="new"

4. 重启

#重启
systemctl restart etcd
#验证
etcdctl member list
#显示为
#5f44000e312e72: name=Node03 peerURLs=http://10.0.0.32:2380 clientURLs=http://10.0.0.32:2379 isLeader=false
#2ed06313262270a9: name=Node02 peerURLs=http://10.0.0.31:2380 clientURLs=http://10.0.0.31:2379 isLeader=false
#d3845ffbfa785ee1: name=Master peerURLs=http://10.0.0.30:2380 clientURLs=http://10.0.0.30:2379 isLeader=true

#命令测试
etcdctl set name gin
etcdctl get name