open stack--galera cluster

一、环境准备 1、各主机配置静态域名解析： cat /etc/hosts 127.0.0.1   localhost localhost.localdomain localhost4 localhost4.localdomain4 ::1         localhost localhost.localdomain localhost6 localhost6.localdomain6 192.168.210.131 node1 node1.test.com 192.168.210.130 node2 node2.test.com 192.168.210.132 node3 node3.test.com   2、并配置各节点ssh无密钥登陆   3、安装docker环境 wget http://download2.yunwei.edu/shell/docker.tar.gz tar zxf  docker.tar.gz cd docker sh docker   4、下载配置文件并且导入镜像 wget http://download2.yunwei.edu/shell/galera.tar.gz tar zxf  galera.tar.gz docker load -i mariadb-galera.tar mkdir mkdir /opt/mariadb #######将config.tar.gz 解压后，mv到mkdir /opt/mariadb， tar zxf config.tar.gz && mv config /opt/mariadb/   二、配置集群 #######node1 docker run -d --net host --name galera1 \ -e WSREP_NODE_ADDRESS=192.168.210.131 \ -e WSREP_CLUSTER_ADDRESS=gcomm://192.168.210.131:4567,192.168.210.130:4567,192.168.210.132:4567 \ -p 3306:3306 \ -p 4567:4567/udp \ -p 4567-4568:4567-4568 \ -p 4444:4444 \ -v /opt/mariadb/config/MysqL:/etc/MysqL \ -v /opt/mariadb/config/data:/var/lib/MysqL:Z \ --restart=always \ panubo/mariadb-galera MysqLd   #######node2 docker run -d --net host --name galera2 \ -e WSREP_NODE_ADDRESS=192.168.210.130 \ -e WSREP_CLUSTER_ADDRESS=gcomm://192.168.210.131:4567,192.168.210.130:4567,192.168.210.132:4567 \ -p 3306:3306 \ -p 4567:4567/udp \ -p 4567-4568:4567-4568 \ -p 4444:4444 \ -v /opt/mariadb/config/MysqL:/etc/MysqL \ -v /opt/mariadb/config/data:/var/lib/MysqL:Z \ --restart=always \ panubo/mariadb-galera MysqLd   #########node3 docker run -d --net host --name galera3 \ -e WSREP_NODE_ADDRESS=192.168.210.132 \ -e WSREP_CLUSTER_ADDRESS=gcomm://192.168.210.131:4567,192.168.210.130:4567,192.168.210.132:4567 \ -e MysqL_ROOT_PASSWORD=123 \ -p 3306:3306 \ -p 4567:4567/udp \ -p 4567-4568:4567-4568 \ -p 4444:4444 \ -v /opt/mariadb/config/MysqL:/etc/MysqL \ -v /opt/mariadb/config/data:/var/lib/MysqL:Z \ --restart=always \ panubo/mariadb-galera MysqLd --wsrep-new-cluster     三、登陆数据库时，安装mariadb客户端 yum install mariadb -y MysqL -h 192.168.210.131 -P 3306 -u root -p123   检查集群状态： SHOW STATUS LIKE 'wsrep_cluster_size'; +--------------------+-------+ | Variable_name      | Value | +--------------------+-------+ | wsrep_cluster_size | 3     | +--------------------+-------+     四、故障恢复： （1）集群中某slave节点down机，重启该节点后，重启docke容器即可； （2）集群中master节点down机，重启该master节点后，master-docker容器不能正常启动，因为这是master节点已经切换，          需要将原先master-docker容器删除，再以非wrsep方式启动一个普通容器； （3）集群全部意外down机，强制找一台节点作为master节点；到如下路径，将 safe_to_bootstrap: 0修改为1（平时集群正常时，每个节点都为0） [root@con3 data]# pwd /opt/mariadb/data [root@con3 data]# cat grastate.dat # galERA saved state version: 2.1 uuid:    6a26abec-e7b5-11e8-b15b-b74046986de4 seqno:   -1 safe_to_bootstrap: 0   之后在该节点启动wsrep进程的docker