etcd跨機房部署方案

使用ETCD做為元數據方便快捷，但是談到跨機房災備可能就迷糊了，我們在做節日災備的時候同樣遇到了問題， 通過查閱官方文檔找到了解決方案，官方提供make-mirror方法，提供數據鏡像服務

 

注意： make-mirror 的使用需要依賴於API版本3， 使用API2的無法通過該工具做數據同步

 

有關ETCD的編譯安裝這里就不在說明了， 不明白的可以參考官方說明：https://github.com/coreos/etcd

 

1. 啟動集群1

#!/bin/bash

nohup etcd --name infra1 --listen-client-urls http://127.0.0.1:2379 --advertise-client-urls http://127.0.0.1:2379 --listen-peer-urls http://127.0.0.1:12380 --initial-advertise-peer-urls http://127.0.0.1:12380 --initial-cluster-token etcd-cluster-1 --initial-cluster 'infra1=http://127.0.0.1:12380,infra2=http://127.0.0.1:22380,infra3=http://127.0.0.1:32380' --initial-cluster-state new --enable-pprof &

nohup etcd --name infra2 --listen-client-urls http://127.0.0.1:22379 --advertise-client-urls http://127.0.0.1:22379 --listen-peer-urls http://127.0.0.1:22380 --initial-advertise-peer-urls http://127.0.0.1:22380 --initial-cluster-token etcd-cluster-1 --initial-cluster 'infra1=http://127.0.0.1:12380,infra2=http://127.0.0.1:22380,infra3=http://127.0.0.1:32380' --initial-cluster-state new --enable-pprof &

nohup etcd --name infra3 --listen-client-urls http://127.0.0.1:32379 --advertise-client-urls http://127.0.0.1:32379 --listen-peer-urls http://127.0.0.1:32380 --initial-advertise-peer-urls http://127.0.0.1:32380 --initial-cluster-token etcd-cluster-1 --initial-cluster 'infra1=http://127.0.0.1:12380,infra2=http://127.0.0.1:22380,infra3=http://127.0.0.1:32380' --initial-cluster-state new --enable-pprof &

 

通過命令向集群1中寫入數據

export ETCDCTL_API=3
etcdctl put t1 v1  --endpoints=127.0.0.1:2379,127.0.0.1:22379,127.0.0.1:32379
etcdctl put t2 v2  --endpoints=127.0.0.1:2379,127.0.0.1:22379,127.0.0.1:32379
etcdctl put t3 v3  --endpoints=127.0.0.1:2379,127.0.0.1:22379,127.0.0.1:32379
etcdctl put t4 v4  --endpoints=127.0.0.1:2379,127.0.0.1:22379,127.0.0.1:32379

 

2. 啟動集群2

#!/bin/bash

nohup etcd --name infra4 --listen-client-urls http://127.0.0.1:12479 --advertise-client-urls http://127.0.0.1:12479 --listen-peer-urls http://127.0.0.1:12480 --initial-advertise-peer-urls http://127.0.0.1:12480 --initial-cluster-token etcd-cluster-2 --initial-cluster 'infra4=http://127.0.0.1:12480,infra5=http://127.0.0.1:22480,infra6=http://127.0.0.1:32480' --initial-cluster-state new --enable-pprof &

nohup etcd --name infra5 --listen-client-urls http://127.0.0.1:22479 --advertise-client-urls http://127.0.0.1:22479 --listen-peer-urls http://127.0.0.1:22480 --initial-advertise-peer-urls http://127.0.0.1:22480 --initial-cluster-token etcd-cluster-2 --initial-cluster 'infra4=http://127.0.0.1:12480,infra5=http://127.0.0.1:22480,infra6=http://127.0.0.1:32480' --initial-cluster-state new --enable-pprof &

nohup etcd --name infra6 --listen-client-urls http://127.0.0.1:32479 --advertise-client-urls http://127.0.0.1:32479 --listen-peer-urls http://127.0.0.1:32480 --initial-advertise-peer-urls http://127.0.0.1:32480 --initial-cluster-token etcd-cluster-2 --initial-cluster 'infra4=http://127.0.0.1:12480,infra5=http://127.0.0.1:22480,infra6=http://127.0.0.1:32480' --initial-cluster-state new --enable-pprof &

 

3. 使用 make-mirror同步數據

#export ETCDCTL_API=3;
#etcdctl make-mirror --no-dest-prefix=true  127.0.0.1:12479  --endpoints=127.0.0.1:2379,127.0.0.1:22379,127.0.0.1:32379 --insecure-skip-tls-verify=true

 

4. 查看集群2的數據　　

export ETCDCTL_API=3;etcdctl get t1 t99 --endpoints=127.0.0.1:12479,127.0.0.1:22479,127.0.0.1:32479

 

通過以上命令發現集群1和集群2的數據已經完全同步了， etcdctl make-mirror 代碼里面數據同步打印的周期是30s一次， 可以通過日志查看已經同步數據的數量。