mysql 8 33060_MySQL 8.0 InnoDB Cluster 恢复故障成员

初始化故障节点

systemctl stop mysqld

rm -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.dump

scp 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.dump

mysql> 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(‘[email protected]:3306‘)

MySQL 192.168.1.226:33060+ ssl JS > cluster.addInstance(‘[email protected]: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://[email protected]:3306"

}