etcd 集群部署与数据恢复

节点规划
172.25.102.10  node1
172.25.102.39  node2
172.25.102.17  node3

部署过程
三个节点都执行
yum install etcd -y
mkdir /data/etcd 


node1:
配置文件
$ cat /etc/etcd/etcd.conf
#[Member]
ETCD_NAME="node1" 
ETCD_DATA_DIR="/data/etcd/node1.etcd/" 
ETCD_LISTEN_PEER_URLS="http://172.25.102.10:2380"
ETCD_LISTEN_CLIENT_URLS="http://172.25.102.10:2379,http://127.0.0.1:2379"
   
#[Clustering]
ETCD_INITIAL_ADVERTISE_PEER_URLS="http://172.25.102.10:2380"
ETCD_ADVERTISE_CLIENT_URLS="http://172.25.102.10:2379" 
ETCD_INITIAL_CLUSTER="node1=http://172.25.102.10:2380,node2=http://172.25.102.39:2380,node3=http://172.25.102.17:2380" 
ETCD_INITIAL_CLUSTER_TOKEN="token001"
ETCD_INITIAL_CLUSTER_STATE="new"


node1 启动文件
$ cat /usr/lib/systemd/system/etcd.service 
[Unit]
Description=Etcd Server
After=network.target
[Service]
Type=simple
WorkingDirectory=/data/etcd/
EnvironmentFile=-/etc/etcd/etcd.conf
ExecStart=/usr/bin/etcd
auto-compaction-retention=1
quota-backend-bytes=8589934592
[Install]
WantedBy=multi-user.target

启动 node1
systemctl start etcd



node2 
配置文件
$ cat /etc/etcd/etcd.conf
#[Member]
ETCD_NAME="node2" 
ETCD_DATA_DIR="/data/etcd/node2.etcd/" 
ETCD_LISTEN_PEER_URLS="http://172.25.102.39:2380"
ETCD_LISTEN_CLIENT_URLS="http://172.25.102.39:2379,http://127.0.0.1:2379"
   
#[Clustering]
ETCD_INITIAL_ADVERTISE_PEER_URLS="http://172.25.102.39:2380"
ETCD_ADVERTISE_CLIENT_URLS="http://172.25.102.39:2379" 
ETCD_INITIAL_CLUSTER="node1=http://172.25.102.10:2380,node2=http://172.25.102.39:2380,node3=http://172.25.102.17:2380" 
ETCD_INITIAL_CLUSTER_TOKEN="token001"
ETCD_INITIAL_CLUSTER_STATE="new"


node2 
启动文件
$  cat /usr/lib/systemd/system/etcd.service 
[Unit]
Description=Etcd Server
After=network.target
[Service]
Type=simple
WorkingDirectory=/data/etcd/
EnvironmentFile=-/etc/etcd/etcd.conf
ExecStart=/usr/bin/etcd
auto-compaction-retention=1
quota-backend-bytes=8589934592
[Install]
WantedBy=multi-user.target

启动 node2
systemctl start etcd

node3
配置文件
$ cat /etc/etcd/etcd.conf 
#[Member]
ETCD_NAME="node3" 
ETCD_DATA_DIR="/data/etcd/node3.etcd/" 
ETCD_LISTEN_PEER_URLS="http://172.25.102.17:2380"
ETCD_LISTEN_CLIENT_URLS="http://172.25.102.17:2379,http://127.0.0.1:2379"
   
#[Clustering]
ETCD_INITIAL_ADVERTISE_PEER_URLS="http://172.25.102.17:2380"
ETCD_ADVERTISE_CLIENT_URLS="http://172.25.102.17:2379" 
ETCD_INITIAL_CLUSTER="node1=http://172.25.102.10:2380,node2=http://172.25.102.39:2380,node3=http://172.25.102.17:2380" 
ETCD_INITIAL_CLUSTER_TOKEN="token001"
ETCD_INITIAL_CLUSTER_STATE="new"


node3 启动文件
$  cat /usr/lib/systemd/system/etcd.service 
[Unit]
Description=Etcd Server
After=network.target
[Service]
Type=simple
WorkingDirectory=/data/etcd/
EnvironmentFile=-/etc/etcd/etcd.conf
ExecStart=/usr/bin/etcd
auto-compaction-retention=1
quota-backend-bytes=8589934592
[Install]
WantedBy=multi-user.target

启动 node3
systemctl start etcd

etcd 数据恢复
etcd 获取备份数据172.24.119.41-snapshot-2019-09-24.db 后，分别将改备份数据分发至三个节点
分别停止etcd 三个节点


systemctl stop etcd
确认停掉三个节点后依次执行恢复操作


node1 恢复操作
mv /data/etcd/node1.etcd /data/etcd/node1.etcd_bak
cd /data/etcd/
etcdctl snapshot  restore   /data/172.24.119.41-snapshot-2019-09-24.db            --name node1   --initial-cluster node1=http://172.25.102.10:2380,node2=http://172.25.102.39:2380,node3=http://172.25.102.17:2380   --initial-advertise-peer-urls http://172.25.102.10:2380


node2 恢复操作
mv /data/etcd/node2.etcd /data/etcd/node2.etcd_bak
cd /data/etcd/
etcdctl snapshot  restore   /data/172.24.119.41-snapshot-2019-09-24.db            --name node2   --initial-cluster node1=http://172.25.102.10:2380,node2=http://172.25.102.39:2380,node3=http://172.25.102.17:2380   --initial-advertise-peer-urls http://172.25.102.39:2380


node3 恢复操作

mv /data/etcd/node3.etcd /data/etcd/node3.etcd_bak
cd /data/etcd/
etcdctl snapshot  restore   /data/172.24.119.41-snapshot-2019-09-24.db            --name node3   --initial-cluster node1=http://172.25.102.10:2380,node2=http://172.25.102.39:2380,node3=http://172.25.102.17:2380   --initial-advertise-peer-urls http://172.25.102.17:2380


node1 node2 node3 依次启动 etcd
systemctl start etcd

etcdctl get /ad/media  查看恢复的数据已正常