MySQL 8.0 InnoDB Cluster出现故障如何解决

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InnoDB Cluster 一节点丢失

初始化故障节点

systemctl stop mysqldrm -rf /var/lib/mysql/*systemctl start mysqld

导出正常节点的数据库，并传到故障节点

mysqldump --all-databases --triggers --routines --events --quick --single-transaction --flush-logs --master-data=2 > dbs.dumpscp dbs.dump 192.168.1.224:~/

故障节点导入数据库

mysql> set sql_log_bin=0;mysql> ALTER USER root@'localhost' IDENTIFIED BY 'MySQL8.0';mysql> source dbs.dumpmysql> set sql_log_bin=1;

重启故障节点 MySQL

systemctl restart mysqld

将故障节点重新加入集群

MySQL  192.168.1.226:33060+ ssl  JS > var cluster=dba.getCluster('appCluster')MySQL  192.168.1.226:33060+ ssl  JS > cluster.removeInstance('root@192.168.1.224:3306')MySQL  192.168.1.226:33060+ ssl  JS > cluster.addInstance('root@192.168.1.224:3306')

集群恢复正常

 MySQL  192.168.1.226:33060+ ssl  JS > cluster.status(){    "clusterName": "appCluster",     "defaultReplicaSet": {        "name": "default",         "primary": "192.168.1.226:3306",         "ssl": "REQUIRED",         "status": "OK",         "statusText": "Cluster is ONLINE and can tolerate up to ONE failure.",         "topology": {            "192.168.1.224:3306": {                "address": "192.168.1.224:3306",                 "mode": "R/O",                 "readReplicas": {},                 "role": "HA",                 "status": "ONLINE"            },             "192.168.1.225:3306": {                "address": "192.168.1.225:3306",                 "mode": "R/O",                 "readReplicas": {},                 "role": "HA",                 "status": "ONLINE"            },             "192.168.1.226:3306": {                "address": "192.168.1.226:3306",                 "mode": "R/W",                 "readReplicas": {},                 "role": "HA",                 "status": "ONLINE"            }        }    },     "groupInformationSourceMember": "mysql://root@192.168.1.226:3306"
}

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