Mycat中间件实现Percona Cluster集群读写分离 - MySQL数据库
Mycat实现读写分离架构图:
Mycat主从自动切换架构图:
Mycat下载地址:http://dl.mycat.io/1.6.7.3/20190828135747/Mycat-server-1.6.7.3-release-20190828135747-linux.tar.gz
Percona-XtraDB-Cluster下载地址:https://www.percona.com/downloads/Percona-XtraDB-Cluster-57/LATEST/
Percona-XtraBackup下载地址:
https://www.percona.com/downloads/Percona-XtraBackup-2.4/LATEST/
yum仓库地址:https://www.percona.com/downloads/percona-release/redhat/
1.下载,安装Percona-XtraDB-Cluster(三台都需要装)
[root@k8s01 ~]# rpm -ivh https://www.percona.com/redir/downloads/percona-release/redhat/1.0-13/percona-release-1.0-13.noarch.rpm
[root@k8s01 ~]# yum repolist
[root@k8s01 ~]# rpm -ivh percona-xtrabackup-24-2.4.13-1.el7.x86_64.rpm
[root@k8s01 ~]# yum install Percona-XtraDB-Cluster-57 -y
2.修改配置,启动服务(k8s01节点)
[root@k8s01 ~]# vim /etc/percona-xtradb-cluster.conf.d/mysqld.cnf
log-bin=k8s01-bin
log-bin-index=k8s01-bin-index
[root@k8s01 ~]# vim /etc/percona-xtradb-cluster.conf.d/wsrep.cnf
[mysqld]
wsrep_provider=/usr/lib64/galera3/libgalera_smm.so
wsrep_cluster_address=gcomm://192.168.54.129,192.168.54.130,192.168.54.128
binlog_format=ROW
default_storage_engine=InnoDB
wsrep_slave_threads= 8
wsrep_log_conflicts
innodb_autoinc_lock_mode=2
wsrep_node_address=192.168.54.128 –三个节点值不一样
wsrep_cluster_name=mycluster
wsrep_node_name=k8s01
pxc_strict_mode=ENFORCING
wsrep_sst_method=xtrabackup-v2
wsrep_sst_auth="sstuser:s3cretPass"
[root@k8s01 ~]# mysql_install_db –defaults-file=/etc/percona-xtradb-cluster.cnf –datadir=/var/lib/mysql –初使化数据
[root@k8s01 ~]# systemctl start
mysql@bootstrap.service –第一次启动,不需要同步数据
[root@k8s01 ~]# ps -ef | grep mysql
root 60672 54285 0 14:56 pts/1 00:00:00 tailf /var/log/mysqld.log
root 66031 1 0 15:03 ? 00:00:00 /bin/sh /usr/bin/mysqld_safe –basedir=/usr –wsrep-new-cluster
mysql 66568 66031 6 15:03 ? 00:00:01 /usr/sbin/mysqld –basedir=/usr –datadir=/var/lib/mysql –plugin-dir=/usr/lib64/mysql/plugin –user=mysql –wsrep-provider=/usr/lib64/galera3/libgalera_smm.so –wsrep-new-cluster –log-error=
/var/log/mysqld.log –pid-file=/var/run/mysqld/mysqld.pid –socket=/var/lib/mysql/mysql.sock –wsrep_start_position=00000000-0000-0000-0000-000000000000:-1root 66763 33815 0 15:04 pts/0 00:00:00 grep –color=auto mysql
[root@k8s01 ~]# cat ~/.mysql_secret# Password set for user 'root@localhost' at 2019-11-15 14:40:31
ya;-t*taM8T< –mysql登陆密码
[root@k8s01 ~]# mysql -u root -p'ya;-t*taM8T<'
mysql: [Warning] Using a password on the command line interface can be insecure.
Welcome to the MySQL monitor. Commands end with ; or g.
Your MySQL connection id is 13
Server version: 5.7.27-30-57-log
Copyright (c) 2009-2019 Percona LLC and/or its affiliatesCopyright (c) 2000, 2019, Oracle and/or its affiliates. All rights reserved.
Oracle is a registered trademark of Oracle Corporation and/or itsaffiliates. Other names may be trademarks of their respective owners.
Type 'help;' or 'h' for help. Type 'c' to clear the current input statement. mysql> set password=password('System135');Query OK, 0 rows affected, 1 warning (0.02 sec)
mysql> flush privileges;Query OK, 0 rows affected (0.00 sec)
mysql> exitBye
[root@k8s01 ~]# mysql -u root -pSystem135mysql: [Warning] Using a password on the command line interface can be insecure.
Welcome to the MySQL monitor. Commands end with ; or g.
Your MySQL connection id is 16
Server version: 5.7.27-30-57-log Percona XtraDB Cluster (GPL), Release rel30, Revision 64987d4, WSREP version 31.39, wsrep_31.39
Copyright (c) 2009-2019 Percona LLC and/or its affiliatesCopyright (c) 2000, 2019, Oracle and/or its affiliates. All rights reserved.
Oracle is a registered trademark of Oracle Corporation and/or itsaffiliates. Other names may be trademarks of their respective owners.
Type 'help;' or 'h' for help. Type 'c' to clear the current input statement. mysql> grant all privileges on *.* tosstuser@'%' identified by 's3cretPass'; –创建percona xtradb cluster用户
Query OK, 0 rows affected, 1 warning (0.05 sec)
mysql> flush privileges;Query OK, 0 rows affected (0.01 sec)
mysql> exitBye
[root@k8s01 ~]#
3.修改配置,启动服务(k8s02节点)
[root@k8s02 ~]# vim /etc/percona-xtradb-cluster.conf.d/mysqld.cnf
log-bin=k8s01-bin
log-bin-index=k8s01-bin-index
[root@k8s02 ~]# vim /etc/percona-xtradb-cluster.conf.d/wsrep.cnf
[mysqld]
wsrep_provider=/usr/lib64/galera3/libgalera_smm.so
wsrep_cluster_address=gcomm://192.168.54.128,192.168.54.129,192.168.54.130
binlog_format=ROW
default_storage_engine=InnoDB
wsrep_slave_threads= 8
wsrep_log_conflicts
innodb_autoinc_lock_mode=2
wsrep_node_address=192.168.54.129
wsrep_cluster_name=mycluster
wsrep_node_name=k8s02
pxc_strict_mode=ENFORCING
wsrep_sst_method=xtrabackup-v2
wsrep_sst_auth="sstuser:s3cretPass"
[root@k8s02 ~]# systemctl start mysql
4.修改配置,启动服务(k8s03节点)
[root@k8s03 ~]# vim /etc/percona-xtradb-cluster.conf.d/mysqld.cnf
log-bin=k8s01-bin
log-bin-index=k8s01-bin-index
[root@k8s03 ~]# vim /etc/percona-xtradb-cluster.conf.d/wsrep.cnf
[mysqld]
wsrep_provider=/usr/lib64/galera3/libgalera_smm.so
wsrep_cluster_address=gcomm://192.168.54.128,192.168.54.129,192.168.54.130 binlog_format=ROWdefault_storage_engine=InnoDB
wsrep_slave_threads= 8
wsrep_log_conflicts
innodb_autoinc_lock_mode=2
wsrep_node_address=192.168.54.130
wsrep_cluster_name=mycluster
wsrep_node_name=k8s03
pxc_strict_mode=ENFORCING
wsrep_sst_method=xtrabackup-v2
wsrep_sst_auth="sstuser:s3cretPass"
[root@k8s03 ~]# systemctl start mysql
5.测试Percona-XtraDB-Cluster集群数据同步
k8s01节点:
[root@k8s01 ~]# mysql -u root -pSystem135mysql: [Warning] Using a password on the command line interface can be insecure.
Welcome to the MySQL monitor. Commands end with ; or g.
Your MySQL connection id is 22
Server version: 5.7.27-30-57-log Percona XtraDB Cluster (GPL), Release rel30, Revision 64987d4, WSREP version 31.39, wsrep_31.39
Copyright (c) 2009-2019 Percona LLC and/or its affiliatesCopyright (c) 2000, 2019, Oracle and/or its affiliates. All rights reserved.
Oracle is a registered trademark of Oracle Corporation and/or itsaffiliates. Other names may be trademarks of their respective owners.
Type 'help;' or 'h' for help. Type 'c' to clear the current input statement. mysql> create database wuhan charset utf8;Query OK, 1 row affected (0.01 sec)
mysql> use wuhanDatabase changed
mysql> create table t (a int primary key,b int);
Query OK, 0 rows affected (0.02 sec)
mysql> insert into t values(1,2),(2,3);Query OK, 2 rows affected (0.02 sec)
Records: 2 Duplicates: 0 Warnings: 0
mysql> select * from t;+—+——+
| a | b |
+—+——+
| 1 | 2 |
| 2 | 3 |
+—+——+
2 rows in set (0.00 sec)
mysql> exitBye
[root@k8s01 ~]#
k8s02节点:
[root@k8s02 ~]# mysql -u root -pSystem135mysql: [Warning] Using a password on the command line interface can be insecure.
Welcome to the MySQL monitor. Commands end with ; or g.
Your MySQL connection id is 12
Server version: 5.7.27-30-57-log Percona XtraDB Cluster (GPL), Release rel30, Revision 64987d4, WSREP version 31.39, wsrep_31.39
Copyright (c) 2009-2019 Percona LLC and/or its affiliatesCopyright (c) 2000, 2019, Oracle and/or its affiliates. All rights reserved.
Oracle is a registered trademark of Oracle Corporation and/or itsaffiliates. Other names may be trademarks of their respective owners.
Type 'help;' or 'h' for help. Type 'c' to clear the current input statement. mysql> use wuhanReading table information for completion of table and column names
You can turn off this feature to get a quicker startup with -A
Database changedmysql> select * from t;
+—+——+
| a | b |
+—+——+
| 1 | 2 |
| 2 | 3 |
+—+——+
2 rows in set (0.01 sec)
mysql> exitBye
[root@k8s02 ~]#
6.下载,安装Mycat中间件
[root@[root@k8s01 soft]# rpm -ivh jdk-8u221-linux-x64.rpm
warning: jdk-8u221-linux-x64.rpm: Header V3 RSA/SHA256 Signature, key ID ec551f03: NOKEY
Preparing… ################################# [100%]
Updating / installing…
1:jdk1.8-2000:1.8.0_221-fcs ################################# [100%]
Unpacking JAR files…
tools.jar…
plugin.jar…
javaws.jar…
deploy.jar…
rt.jar…
jsse.jar…
charsets.jar…
localedata.jar…
[root@k8s01 soft]# tar xvf Mycat-server-1.6.7.3-release-20190828135747-linux.tar.gz -C /usr/local/
[root@k8s01 soft]# cd /usr/local/mycat/conf/
[root@k8s01 conf]# vim schema.xml
[root@k8s01 conf]# vim server.xml
<user name="root" defaultAccount="true"><property name="password">System135</property>
<property name="schemas">hubei</property>
</user>[root@k8s01 conf]# ../bin/mycat restart
Stopping Mycat-server…
Mycat-server was not running.
Starting Mycat-server…
[root@k8s01 conf]# netstat -antulp | grep 9066
tcp6 0 0 :::9066 :::* LISTEN 100087/java
[root@k8s01 conf]#
7.使用Mycat验证读,写数据
(1).查看管理端口服务
(2).查看数据,如果想要看负载均衡效果,必须退出终端,再登陆。
(3).k8s01节点写入数据,k8s02和k8s03读数据
8.k8s01节点宕机后,k8s02节点负责写入数据,k8s03读数据
[root@k8s01 conf]# systemctl stop mysql@bootstrap.service
[root@k8s01 conf]# netstat -antulp | grep 3306
tcp6 0 0 10.4.132.50:60568 10.4.132.42:3306 ESTABLISHED 100087/java
tcp6 0 0 10.4.132.50:51072 10.4.132.66:3306 ESTABLISHED 100087/java
[root@k8s01 conf]# ps -ef | grep mysqld
root 115559 33815 0 16:58 pts/0 00:00:00 grep –color=auto mysqld
[root@k8s01 conf]# (1).关闭k8s01节点的mysql,写入一条数据,读取一次。(2).写入节点是k8s02,读节点是k8s03
错误处理:
(1).Mysql没有初使化数据
2019-11-15T06:33:04.384904Z 0 [Note] Server socket created on IP: '::'.2019-11-15T06:33:04.385584Z 0 [Warning] Failed to open optimizer cost constant tables
2019-11-15T06:33:04.385659Z 0 [ERROR] Fatal error: Can't open and lock privilege tables: Table 'mysql.user' doesn't exist
2019-11-15T06:33:04.385668Z 0 [ERROR] Fatal error: Failed to initialize ACL/grant/time zones structures or failed to remove temporary table files.
2019-11-15T06:33:04.385687Z 0 [ERROR] Aborting
解决方法:
[root@k8s01 conf]# mysql_install_db –defaults-file=/etc/percona-xtradb-cluster.cnf –datadir=/var/lib/mysql –需要初使化数据
(2).第一个节点第一次启动必须要创建新的集群
2019-11-15T06:41:35.761089Z 0 [Note] WSREP: Current view of cluster as seen by this node
view ((empty))
2019-11-15T06:41:35.761280Z 0 [ERROR] WSREP: failed to open gcomm backend connection: 110: failed to reach primary view (pc.wait_prim_timeout): 110 (Connection timed out)
at gcomm/src/pc.cpp:connect():159
2019-11-15T06:41:35.761309Z 0 [ERROR] WSREP: gcs/src/gcs_core.cpp:gcs_core_open():209: Failed to open backend connection: -110 (Connection timed out)
2019-11-15T06:41:35.761583Z 0 [ERROR] WSREP: gcs/src/gcs.cpp:gcs_open():1514: Failed to open channel 'pxc_1' at 'gcomm://192.168.54.128,192.168.54.129,192.168.54.130': -110 (Connection timed out)
2019-11-15T06:41:35.761597Z 0 [ERROR] WSREP: gcs connect failed: Connection timed out
2019-11-15T06:41:35.761600Z 0 [ERROR] WSREP: Provider/Node (gcomm://192.168.54.128,192.168.54.129,192.168.54.130) failed to establish connection with cluster (reason: 7)
2019-11-15T06:41:35.761603Z 0 [ERROR] Aborting
解决方法:
[root@k8s01 ~]# systemctl start
mysql@bootstrap.service –必须添加
@bootstrap.service启动服务
(3).没有创建wsrep.cnf用户名
2019-11-15T07:27:59.158666Z 0 [ERROR] WSREP: Command did not run: wsrep_sst_xtrabackup-v2 –role 'donor' –address '192.168.54.129:4444/xtrabackup_sst//1' –socket '/var/lib/mysql/mysql.sock' –datadir '/var/lib/mysql/' –defaults-file '/etc/my.cnf' –defaults-group-suf
fix '' –mysqld-version '5.7.27-30-57' '' –gtid '19a21dce-0776-11ea-8879-92a989219bb1:2'2019-11-15T07:27:59.159302Z 0 [Warning] WSREP: Protocol violation. JOIN message sender 0.0 (k8s01) is not in state transfer (SYNCED). Message ignored.
2019-11-15T07:27:59.159405Z 5 [Note] WSREP: Synchronized with group, ready for connections
解决方法:
[root@k8s01 conf]# grep sst /etc/percona-xtradb-cluster.conf.d/wsrep.cnf
wsrep_sst_method=xtrabackup-v2
wsrep_sst_auth="sstuser:s3cretPass"
[root@k8s01 conf]#
mysql> grant all privileges on *.* tosstuser@'%' identified by 's3cretPass'; –创建用户
Query OK, 0 rows affected, 1 warning (0.05 sec)
mysql> flush privileges;Query OK, 0 rows affected (0.01 sec)
mysql> exit
Bye
[root@k8s01 ~]#
发布于:2023-01-18,除非注明,否则均为
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