docker技术快速实现前后端项目的集群化⑤docker环境下搭建percona-mysql的pxc集群

docker技术快速实现前后端项目的集群化⑤docker环境下搭建percona-mysql的pxc集群

生产环境中使用docker搭建类似mysql数据库、redis等有业务状态的集群是不合理的,数据库的数据很关键,压力大,对性能的要求较高,如果集群崩溃除了重启docker没有太好的解决方法,而重启对业务的影响是很难控制的

 

部署pxc集群perconadb

参考文档:https://hub.docker.com/r/percona/percona-xtradb-cluster/

# docker pull docker.io/percona/percona-xtradb-cluster

 

给镜像改名字

[root@server01 ~]# docker images

 [root@server01 ~]# docker tag docker.io/percona/percona-xtradb-cluster pxc

处于安全考虑需要给pxc集群创建docker内部网络

 

创建自定义网段172.18.0.0/24,docker inspect net1可以查看网络信息

[root@server01 ~]# docker network create --subnet=172.18.0.0/24 net1

 [root@server01 ~]# docker inspect net1

Docker的存储

一般可以直接映射到宿主机,Pxc技术不能直接映射需要使用到卷volume

# 创建卷

[root@server01 ~]# docker volume create v1

# 查看卷信息

[root@server01 ~]# docker inspect v1

# 删除卷

[root@server01 ~]# docker volume rm v1

创建集群

创建pxc各节点的volume卷

 

创建5节点的pxc集群

1.创建5个卷

[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

创建第一个节点

[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

 

我们在创建第一个pxc实例后要等待第一个实例可以成功运行,并且能通过客户端连接,因为启动node2,node3。。。等需要和node1同步,如果同步不成功就会闪退

通过客户端工具测试是否能够连接成功

依次创建剩下的4个pxc节点
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


默认使用的是percona8.0但是第二个节点起不来,报错ssl证书问题
于是使用percona-mysql5.7
# docker pull percona/percona-xtradb-cluster:5.7
# docker tag percona/percona-xtradb-cluster:5.7
因为之前volume已经创建了percona8.0的文件,此时再次启动就起不来,所以需要删除里面的文件
# docker volume rm v1
# docker volume create v1
# 再次执行节点的创建
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
# 最终全部跑起来了
[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

# 等待所有节点都创建完成,并且能通过客户端连接
验证集群的同步是否正常,在node01中创建库,表,插入数据,在node03中看是否正常同步

报错:
[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
解决办法:
[root@server01 ~]# systemctl restart docker

启动集群报错
# 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

 

处理办法:
[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修改为1
safe_to_bootstrap: 1

 

posted @ 2020-07-31 14:51  reblue520  阅读(343)  评论(0编辑  收藏  举报