docker技術快速實現前後端專案的叢集化⑤docker環境下搭建percona-mysql的pxc叢集
docker技術快速實現前後端專案的叢集化⑤docker環境下搭建percona-mysql的pxc叢集
生產環境中使用docker搭建類似mysql資料庫、redis等有業務狀態的叢集是不合理的,資料庫的資料很關鍵,壓力大,對效能的要求較高,如果叢集崩潰除了重啟docker沒有太好的解決方法,而重啟對業務的影響是很難控制的
部署pxc叢集perconadb
參考文件:https://hub.docker.com/r/percona/percona-xtradb-cluster/
# docker pull docker.io/percona/percona-xtradb-cluster
給映象改名字
[root@server01 ~]# docker images
[root@server01 ~]# docker tag docker.io/percona/percona-xtradb-cluster pxc
處於安全考慮需要給pxc叢集建立docker內部網路
建立自定義網段172.18.0.0/24,docker inspect net1可以檢視網路資訊
[root@server01 ~]# docker network create --subnet=172.18.0.0/24 net1
[root@server01 ~]# docker inspect net1
Docker的儲存
一般可以直接對映到宿主機,Pxc技術不能直接對映需要使用到卷volume
# 建立卷
[root@server01 ~]# docker volume create v1
# 檢視卷資訊
[root@server01 ~]# docker inspect v1
# 刪除卷
[root@server01 ~]# docker volume rm v1
建立叢集
建立pxc各節點的volume卷
建立5節點的pxc叢集
1.建立5個卷
[root@server01 ~]# docker volume create v1
[root@server01 ~]# docker volume create v2
[root@server01 ~]# docker volume create v3
[root@server01 ~]# docker volume create v4
[root@server01 ~]# docker volume create v5
[root@server01 ~]# docker volume ls
DRIVER VOLUME NAME
local v1
local v2
local v3
local v4
local v5
建立第一個節點
[root@server01 ~]# docker run -d -p 3306:3306 -e MYSQL_ROOT_PASSWORD=root123456 -e CLUSTER_NAME=pxc01 -e XTRABACKUP_PASSWORD=root123456 -v v1:/var/lib/mysql --privileged --name=pxcnode01 --net=net1 --ip 172.18.0.2 pxc
我們在建立第一個pxc例項後要等待第一個例項可以成功執行,並且能通過客戶端連線,因為啟動node2,node3。。。等需要和node1同步,如果同步不成功就會閃退
通過客戶端工具測試是否能夠連線成功
依次建立剩下的4個pxc節點 docker run -d -p 3306:3306 -e MYSQL_ROOT_PASSWORD=root123456 -e CLUSTER_NAME=pxc01 -e XTRABACKUP_PASSWORD=root123456 -v v1:/var/lib/mysql --privileged --name=pxcnode01 --net=net1 --ip 172.18.0.2 pxc docker run -d -p 3307:3306 -e MYSQL_ROOT_PASSWORD=root123456 -e CLUSTER_NAME=pxc01 -e XTRABACKUP_PASSWORD=root123456 -e CLUSTER_JOIN=node1 -v v2:/var/lib/mysql --privileged --name=pxcnode02 --net=net1 --ip 172.18.0.3 pxc docker run -d -p 3308:3306 -e MYSQL_ROOT_PASSWORD=root123456 -e CLUSTER_NAME=pxc01 -e XTRABACKUP_PASSWORD=root123456 -e CLUSTER_JOIN=node1 -v v3:/var/lib/mysql --privileged --name=pxcnode03 --net=net1 --ip 172.18.0.4 pxc docker run -d -p 3309:3306 -e MYSQL_ROOT_PASSWORD=root123456 -e CLUSTER_NAME=pxc01 -e XTRABACKUP_PASSWORD=root123456 -e CLUSTER_JOIN=node1 -v v4:/var/lib/mysql --privileged --name=pxcnode04 --net=net1 --ip 172.18.0.5 pxc docker run -d -p 3310:3306 -e MYSQL_ROOT_PASSWORD=root123456 -e CLUSTER_NAME=pxc01 -e XTRABACKUP_PASSWORD=root123456 -e CLUSTER_JOIN=node1 -v v5:/var/lib/mysql --privileged --name=pxcnode05 --net=net1 --ip 172.18.0.6 pxc 預設使用的是percona8.0但是第二個節點起不來,報錯ssl證書問題 於是使用percona-mysql5.7 # docker pull percona/percona-xtradb-cluster:5.7 # docker tag percona/percona-xtradb-cluster:5.7 因為之前volume已經建立了percona8.0的檔案,此時再次啟動就起不來,所以需要刪除裡面的檔案 # docker volume rm v1 # docker volume create v1 # 再次執行節點的建立 docker run -d -p 3306:3306 -e MYSQL_ROOT_PASSWORD=root123456 -e CLUSTER_NAME=pxc01 -e XTRABACKUP_PASSWORD=root123456 -v v1:/var/lib/mysql --privileged --name=pxcnode01 --net=net1 --ip 172.18.0.2 pxc docker run -d -p 3307:3306 -e MYSQL_ROOT_PASSWORD=root123456 -e CLUSTER_NAME=pxc01 -e XTRABACKUP_PASSWORD=root123456 -e CLUSTER_JOIN=pxcnode01 -v v2:/var/lib/mysql --privileged --name=pxcnode02 --net=net1 --ip 172.18.0.3 pxc docker run -d -p 3308:3306 -e MYSQL_ROOT_PASSWORD=root123456 -e CLUSTER_NAME=pxc01 -e XTRABACKUP_PASSWORD=root123456 -e CLUSTER_JOIN=pxcnode01 -v v3:/var/lib/mysql --privileged --name=pxcnode03 --net=net1 --ip 172.18.0.4 pxc docker run -d -p 3309:3306 -e MYSQL_ROOT_PASSWORD=root123456 -e CLUSTER_NAME=pxc01 -e XTRABACKUP_PASSWORD=root123456 -e CLUSTER_JOIN=pxcnode01 -v v4:/var/lib/mysql --privileged --name=pxcnode04 --net=net1 --ip 172.18.0.5 pxc docker run -d -p 3310:3306 -e MYSQL_ROOT_PASSWORD=root123456 -e CLUSTER_NAME=pxc01 -e XTRABACKUP_PASSWORD=root123456 -e CLUSTER_JOIN=pxcnode01 -v v5:/var/lib/mysql --privileged --name=pxcnode05 --net=net1 --ip 172.18.0.6 pxc # 最終全部跑起來了 [root@server01 ~]# docker ps CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES 1561e31c4952 pxc "/entrypoint.sh my..." 6 seconds ago Up 5 seconds 4567-4568/tcp, 0.0.0.0:3310->3306/tcp pxcnode05 befc01d39968 pxc "/entrypoint.sh my..." 25 seconds ago Up 24 seconds 4567-4568/tcp, 0.0.0.0:3309->3306/tcp pxcnode04 0e56217ade2c pxc "/entrypoint.sh my..." 44 seconds ago Up 44 seconds 4567-4568/tcp, 0.0.0.0:3308->3306/tcp pxcnode03 39f47c1c7357 pxc "/entrypoint.sh my..." About a minute ago Up About a minute 4567-4568/tcp, 0.0.0.0:3307->3306/tcp pxcnode02 c989361c6d63 pxc "/entrypoint.sh my..." 5 minutes ago Up 5 minutes 0.0.0.0:3306->3306/tcp, 4567-4568/tcp pxcnode01 # 等待所有節點都建立完成,並且能通過客戶端連線 驗證叢集的同步是否正常,在node01中建立庫,表,插入資料,在node03中看是否正常同步
報錯: [root@server01 ~]# docker start pxcnode03 Error response from daemon: driver failed programming external connectivity on endpoint pxcnode03 (982c64d5b204741d8b0b2c6ee1630756643e75199ad27ced845f011525593c81): (iptables failed: iptables --wait -t nat -A DOCKER -p tcp -d 0/0 --dport 3308 -j DNAT --to-destination 172.18.0.4:3306 ! -i br-a90d3111cc8b: iptables: No chain/target/match by that name. (exit status 1)) Error: failed to start containers: pxcnode03 解決辦法: [root@server01 ~]# systemctl restart docker 啟動叢集報錯 # docker logs pxcnode01 2020-07-28T21:41:01.087855Z 0 [ERROR] WSREP: failed to open gcomm backend connection: 131: No address to connect (FATAL) at gcomm/src/gmcast.cpp:connect_precheck():311 2020-07-28T21:41:01.087884Z 0 [ERROR] WSREP: gcs/src/gcs_core.cpp:gcs_core_open():209: Failed to open backend connection: -131 (State not recoverable) 2020-07-28T21:41:01.164568Z 0 [ERROR] WSREP: gcs/src/gcs.cpp:gcs_open():1514: Failed to open channel 'pxc01' at 'gcomm://pxcnode01': -131 (State not recoverable) 2020-07-28T21:41:01.164614Z 0 [ERROR] WSREP: gcs connect failed: State not recoverable 2020-07-28T21:41:01.164620Z 0 [ERROR] WSREP: Provider/Node (gcomm://pxcnode01) failed to establish connection with cluster (reason: 7) 2020-07-28T21:41:01.164623Z 0 [ERROR] Aborting
處理辦法: [root@server01 ~]# docker inspect v1 [ { "Driver": "local", "Labels": {}, "Mountpoint": "/var/lib/docker/volumes/v1/_data", "Name": "v1", "Options": {}, "Scope": "local" } ] [root@server01 ~]# cat /var/lib/docker/volumes/v1/_data/grastate.dat # GALERA saved state version: 2.1 uuid: 7751e544-ce81-11ea-9de6-3784633f45d7 seqno: 27 # 由0修改為1 safe_to_bootstrap: 1