mysql innodb cluster 搭建

根据文档搭建…https://dev.mysql.com/doc/refman/8.0/en/mysql-innodb-cluster-production-deployment.html环境准备:
1 下载和安装需要的软件(本人的软件版本–都是mysql Community中的Linux Generic版本)
mysql-server(mysql-8.0.17-linux-glibc2.12-x86_64.tar.xz)
mysql-router(mysql-router-8.0.17-linux-glibc2.12-x86_64.tar.xz)
mysql-shell(mysql-shell-8.0.17-linux-glibc2.12-x86-64bit.tar.gz)安装(以mysql server为例，其他类似,以下都是Mysql_tar操作系统用户操作):
cd /home/mysql_tar
tar -xvf mysql-8.0.17-linux-glibc2.12-x86_64.tar.xz
ln -s mysql-8.0.17-linux-glibc2.12-x86_64 mysql_install(方便升级)
…mysql-router…
….mysql_shell…#MYSQL SHELL
MYSQL_SHELL_HOME=/home/mysql_tar/mysql_shell
PATH=$PATH:$MYSQL_SHELL_HOME/bin
export MYSQL_SHELL_HOME#MYSQL_ROUTER
MYSQL_ROUTER=/home/mysql_tar/mysql_router
PATH=$PATH:$MYSQL_ROUTER/bin
export MYSQL_ROUTERexport PATHdefault-authentication-plugin=mysql_native_password
lower_case_table_names=1
datadir=/data_test
socket=/data_test/mysql.sock
log-error=/data_test/mysqld.log
pid-file=/data_test/mysqld.pidThis instance reports its own address as mysql_host_a:3306
Clients and other cluster members will communicate with it through this address by default. If this is not correct, the report_host MySQL system variable should be changed.Checking whether existing tables comply with Group Replication requirements…
No incompatible tables detectedChecking instance configuration…NOTE: Some configuration options need to be fixed:
+————————–+—————+—————-+————————————————–+
| Variable | Current Value | Required Value | Note |
+————————–+—————+—————-+————————————————–+
| binlog_checksum | CRC32 | NONE | Update the server variable |
| enforce_gtid_consistency | OFF | ON | Update read-only variable and restart the server |
| gtid_mode | OFF | ON | Update read-only variable and restart the server |
| server_id | 1 | | Update read-only variable and restart the server |
+————————–+—————+—————-+————————————————–+Some variables need to be changed, but cannot be done dynamically on the server.
NOTE: Please use the dba.configureInstance() command to repair these issues.{
“config_errors”: [
{
“action”: “server_update”,
“current”: “CRC32”,
“option”: “binlog_checksum”,
“required”: “NONE”
},
{
“action”: “server_update+restart”,
“current”: “OFF”,
“option”: “enforce_gtid_consistency”,
“required”: “ON”
},
{
“action”: “server_update+restart”,
“current”: “OFF”,
“option”: “gtid_mode”,
“required”: “ON”
},
{
“action”: “server_update+restart”,
“current”: “1”,
“option”: “server_id”,
“required”: ““
}
],
“status”: “error”
}
MySQL mysql_host_a:33060+ ssl JS > exit
Bye!根据错误往/etc/my.cnf添加以下参数:
#for innodb cluster
binlog_checksum=none
enforce_gtid_consistency=on
gtid_mode=on
server_id=1234Validating instance at mysql_host_a:3306…This instance reports its own address as mysql_host_a:3306Instance configuration is suitable.
Creating InnoDB cluster ‘mjjcluster’ on ‘mysql_host_a:3306’…Adding Seed Instance…
Cluster successfully created. Use Cluster.addInstance() to add MySQL instances.
At least 3 instances are needed for the cluster to be able to withstand up to
one server failure.10 可以通过cluster.status();命令查看集群状态
MySQL mysql_host_a:33060+ ssl JS > cluster.status();
{
“clusterName”: “mjjcluster”,
“defaultReplicaSet”: {
“name”: “default”,
“primary”: “mysql_host_a:3306”,
“ssl”: “REQUIRED”,
“status”: “OK_NO_TOLERANCE”,
“statusText”: “Cluster is NOT tolerant to any failures.”,
“topology”: {
“mysql_host_a:3306”: {
“address”: “mysql_host_a:3306”,
“mode”: “R/W”,
“readReplicas”: {},
“role”: “HA”,
“status”: “ONLINE”,
“version”: “8.0.17”
}
},
“topologyMode”: “Single-Primary”
},
“groupInformationSourceMember”: “mysql_ho开发云主机域名st_a:3306″
}11, 其他机子也安装软件和准备环境(dba.checkInstanceConfiguration()通过即可，步骤与主节点类似)NOTE: The target instance ‘mysql_host_b:3306’ has not been pre-provisioned (GTID set
is empty). The Shell is unable to decide whether incremental distributed state
recovery can correctly provision it.
The safest and most convenient way to provision a new instance is through
automatic clone provisioning, which will completely overwrite the state of
‘mysql_host_b:3306’ with a physical snapshot from an existing cluster member.
To use this method by default, set the ‘recoveryMethod’ option to ‘clone’.The incremental distributed state recovery may be safely used if you are sure
all updates ever executed in the cluster were done with GTIDs enabled, there
are no purged transactions and the new instance contains the same GTID set as
the cluster or a subset of it. To use this method by default, set the
‘recoveryMethod’ option to ‘incremental’.Please select a recovery method [C]lone/[I]ncremental recovery/[A]bort (default Clone):
Validating instance at mysql_host_b:3306…This instance reports its own address as mysql_host_b:3306Instance configuration is suitable.
A new instance will be added to the InnoDB cluster. Depending on the amount of
data on the cluster this might take from a few seconds to several hours.Adding instance to the cluster…Monitoring recovery process of the new cluster member. Press ^C to stop monitoring and let it continue in background.
Clone based state recovery is now in progress.NOTE: A server restart is expected to happen as part of the clone process. If the
server does not support the RESTART command or does not come back after a
while, you may need to manually start it back.NOTE: mysql_host_b:3306 is shutting down…State recovery already finished for ‘mysql_host_b:3306’The instance ‘mysql_host_b:3306’ was successfully added to the cluster.。。。完成了，基本的步骤就这些吧。
主要方法:
dba.configureInstance()dba.createCluster()Cluster.addInstance()—-cluster=dba.getCluster()获取cluster变量Cluster.removeInstance()Cluster.rejoinInstance()

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