cobar实现mysql分片及分片集之内双节点之间的高可用
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2022-04-14 15:28:43
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首先看节点规划： IP:192.168.0.99 Host:mgs02 Role：cobar IP:192.168.0.101 Host:mysql01 Role：mysql-master1 IP:192.168.0.102 Host:mysql02 Role：mysql-slave1 IP:192.168.0.103 Host:mysql03 Role：mysql-master2 IP:192.168.0.104 Host:mysql04 Role
首先看节点规划：
IP:192.168.0.99 Host:mgs02 Role：cobar
IP:192.168.0.101 Host:mysql01 Role：mysql-master1
IP:192.168.0.102 Host:mysql02 Role：mysql-slave1
IP:192.168.0.103 Host:mysql03 Role：mysql-master2
IP:192.168.0.104 Host:mysql04 Role：mysql-slave2
数据库分片规划：
lens_conf.* 不分片，数据分布在101和102这个单片上
lens_mobapp_trace.test表 分片，101、102为一个片，103、104为一个片
lens_mobapp_data.emp表 分片，101、102为一个片，103、104为一个片
lens_mobapp_data.loc表 分片，101、102为一个片，103、104为一个片
1、cobar不支持HA下的读写分离，如果使用了HA，每个分片内的节点都可能要有数据写入，因此，应该配置双向同步，首先配置mysql-master1和mysql-slave1、mysql-master2和mysql-slave2的双向同步，这里不再详述，与单向同步的区别就是需要开启log_slave_updates参数，然后彼此设置对方为自己的主库。
接着需要在后端的mysql要做分片的表所在库中创建一张心跳表，并插入10条数据（针对多个cobar节点，避免单条数据的锁争用；如果只有一个cobar节点的话可以只插入一条数据，这里插入10条）
## 需要在lens_conf、lens_mobapp_data、lens_mobapp_trace三个schema中执行下面语句，可以只在 ## 每个分片的某一个节点上执行，另一个节点就会同步执行。 create table xdual(id int not null,gmt datetime,primary key (id)); insert into xdual values(1,now()); insert into xdual values(2,now()); insert into xdual values(3,now()); insert into xdual values(4,now()); insert into xdual values(5,now()); insert into xdual values(6,now()); insert into xdual values(7,now()); insert into xdual values(8,now()); insert into xdual values(9,now()); insert into xdual values(10,now());
2、安装cobar
## 解压 [root@mgs02 opt]# tar xf cobar-server-1.2.7.tar.gz -C /opt/ [root@mgs02 opt]# ls cobar-server-1.2.7/ bin conf lib logs
3、配置cobar
首先配置schema.xml
[root@mgs02 opt]# vim cobar-server-1.2.7/conf/schema.xml
ds_master_shared01$0-2 ds_slave_shared01$0-2 256 update xdual set gmt=now() where id=${(1,10)} ds_master_shared02$0-1 ds_slave_shared02$0-1 256 update xdual set gmt=now() where id=${(1,10)} 192.168.0.101:3306/lens_conf 192.168.0.101:3306/lens_mobapp_data 192.168.0.101:3306/lens_mobapp_trace lens 123456 STRICT_TRANS_TABLES 192.168.0.102:3306/lens_conf 192.168.0.102:3306/lens_mobapp_data 192.168.0.102:3306/lens_mobapp_trace lens 123456 STRICT_TRANS_TABLES 192.168.0.103:3306/lens_mobapp_data 192.168.0.103:3306/lens_mobapp_trace lens 123456 STRICT_TRANS_TABLES 192.168.0.104:3306/lens_mobapp_data 192.168.0.104:3306/lens_mobapp_trace lens 123456 STRICT_TRANS_TABLES
配置rule.xml
[root@mgs02 opt]# vim cobar-server-1.2.7/conf/rule.xmlid empno addr_id 2 512
配置server.xml
[root@mgs02 opt]# cat cobar-server-1.2.7/conf/server.xml8066 9066 16 4 4 4 8 8 _HEARTBEAT_USER_ _HEARTBEAT_PASS_ 123456 192.168.0.99 1
4、启动cobar
[root@mgs02 opt]# cobar-server-1.2.7/bin/startup.sh "/usr/java/jdk1.7.0_75/bin/java" -Dcobar.home="/opt/cobar-server-1.2.7" -classpath "/opt/cobar-server-1.2.7/conf:/opt/cobar-server-1.2.7/lib/classes:/opt/cobar-server-1.2.7/lib/cobar-server-1.2.7.jar:/opt/cobar-server-1.2.7/lib/log4j-1.2.17.jar" -server -Xms1024m -Xmx1024m -Xmn256m -Xss256k -XX:+AggressiveOpts -XX:+UseBiasedLocking -XX:+UseFastAccessorMethods -XX:+DisableExplicitGC -XX:+UseParNewGC -XX:+UseConcMarkSweepGC -XX:+CMSParallelRemarkEnabled -XX:+UseCMSCompactAtFullCollection -XX:+UseCMSInitiatingOccupancyOnly -XX:CMSInitiatingOccupancyFraction=75 com.alibaba.cobar.CobarStartup >> "/opt/cobar-server-1.2.7/logs/console.log" 2>&1 & [root@mgs02 opt]# ps -ef |grep cobar root 1120 1 13 18:58 pts/0 00:00:01 /usr/java/jdk1.7.0_75/bin/java -Dcobar.home=/opt/cobar-server-1.2.7 -classpath /opt/cobar-server-1.2.7/conf:/opt/cobar-server-1.2.7/lib/classes:/opt/cobar-server-1.2.7/lib/cobar-server-1.2.7.jar:/opt/cobar-server-1.2.7/lib/log4j-1.2.17.jar -server -Xms1024m -Xmx1024m -Xmn256m -Xss256k -XX:+AggressiveOpts -XX:+UseBiasedLocking -XX:+UseFastAccessorMethods -XX:+DisableExplicitGC -XX:+UseParNewGC -XX:+UseConcMarkSweepGC -XX:+CMSParallelRemarkEnabled -XX:+UseCMSCompactAtFullCollection -XX:+UseCMSInitiatingOccupancyOnly -XX:CMSInitiatingOccupancyFraction=75 com.alibaba.cobar.CobarStartup root 1165 1062 0 18:59 pts/0 00:00:00 grep cobar [root@mgs02 opt]# netstat -alnut |grep 8066 tcp 0 0 :::8066 :::* LISTEN tcp 0 0 ::ffff:192.168.0.99:8066 ::ffff:192.168.0.99:36721 ESTABLISHED tcp 0 0 ::ffff:192.168.0.99:36721 ::ffff:192.168.0.99:8066 ESTABLISHED
5、连接cobar代理
[root@mgs02 opt]# mysql -ulens -p -h127.0.0.1 -P8066 -Dlens_mobapp_data Enter password: Reading table information for completion of table and column names You can turn off this feature to get a quicker startup with -A Welcome to the MySQL monitor. Commands end with ; or \g. Your MySQL connection id is 3 Server version: 5.1.48-cobar-1.2.7 Cobar Server (ALIBABA) Copyright (c) 2000, 2013, Oracle and/or its affiliates. All rights reserved. Oracle is a registered trademark of Oracle Corporation and/or its affiliates. Other names may be trademarks of their respective owners. Type 'help;' or '\h' for help. Type '\c' to clear the current input statement. mysql> show tables; +----------------------------+ | Tables_in_lens_mobapp_data | +----------------------------+ | test | | xdual | +----------------------------+ 2 rows in set (0.01 sec)
6、测试分片功能
## 首先查看后端是否test表中是否有数据，如果有，清空，便于测试 [root@mgs02 opt]# mysql -ulens -p -h 192.168.0.101 -Dlens_mobapp_data Enter password: mysql> show tables; +----------------------------+ | Tables_in_lens_mobapp_data | +----------------------------+ | test | | xdual | +----------------------------+ 2 rows in set (0.00 sec) mysql> truncate test; Query OK, 0 rows affected (0.03 sec) mysql> select * from test; Empty set (0.00 sec) [root@mgs02 opt]# mysql -ulens -p -h 192.168.0.103 -Dlens_mobapp_data Enter password: mysql> show tables; +----------------------------+ | Tables_in_lens_mobapp_data | +----------------------------+ | test | | xdual | +----------------------------+ 2 rows in set (0.00 sec) mysql> truncate test; Query OK, 0 rows affected (0.03 sec) mysql> select * from test; Empty set (0.00 sec) ## 使用cobar代理插入数据 [root@mgs02 opt]# mysql -ulens -p -h 127.0.0.1 -P8066 -Dlens_mobapp_data Enter password: mysql> insert into test(id,obj) values(1,'Linux'); Query OK, 1 row affected (0.03 sec) mysql> insert into test(id,obj) values(1020,'Mysql'); Query OK, 1 row affected (0.02 sec) mysql> select * from test; +------+-------+ | id | obj | +------+-------+ | 1 | Linux | | 1020 | Mysql | +------+-------+ 2 rows in set (0.02 sec) ## 后端查看数据是否分片 [root@mgs02 opt]# mysql -ulens -p -h 192.168.0.101 -Dlens_mobapp_data Enter password: mysql> select * from test; +------+-------+ | id | obj | +------+-------+ | 1 | Linux | +------+-------+ 1 row in set (0.00 sec) [root@mgs02 opt]# mysql -ulens -p -h 192.168.0.103 -Dlens_mobapp_data Enter password: mysql> select * from test; +------+-------+ | id | obj | +------+-------+ | 1020 | Mysql | +------+-------+ 1 row in set (0.00 sec) ## 可见数据已经成功分片了
7、测试分片内部双节点的HA
## 首先停掉101机器上的mysql服务 [root@mysql01 ~]# /etc/init.d/mysql stop Shutting down MySQL.......... SUCCESS! ## 然后在cobar代理中查询id=1的记录 [root@mgs02 opt]# mysql -ulens -p -h 127.0.0.1 -P8066 -Dlens_mobapp_data Enter password: mysql> select * from test where id=1; +------+-------+ | id | obj | +------+-------+ | 1 | Linux | +------+-------+ 1 row in set (0.01 sec) ## 停掉101服务，代理中查询id=1的记录，发现仍旧可以查询，说明101、102间的HA正常 ## 需要注意的是如果101恢复后，不会自动切换回101，除非102异常
8、安装cobar-manager实现cobar的监控
## 首先下载并安装jdk
[root@mgs02 opt]# yum install jdk-7u75-linux-x64.rpm -y
## 配置java环境变量
[root@mgs02 opt]# vim ~/.bash_profile
# .bash_profile
# Get the aliases and functions
if [ -f ~/.bashrc ]; then
. ~/.bashrc
fi
# User specific environment and startup programs
PATH=$PATH:$HOME/bin:/opt/amoeba/bin
export JAVA_HOME=/usr/java/jdk1.7.0_75
export JRE_HOME=/usr/java/jdk1.7.0_75/jre
export CLASSPATH=./:/usr/java/jdk1.7.0_75/lib:/usr/java/jdk1.7.0_75/jre/lib
export PATH
## 验证是否安装成功
[root@mgs02 opt]# java -version
java version "1.7.0_75"
Java(TM) SE Runtime Environment (build 1.7.0_75-b13)
Java HotSpot(TM) 64-Bit Server VM (build 24.75-b04, mixed mode)
## 安装tomcat
[root@mgs02 opt]# tar xf apache-tomcat-7.0.59.tar.gz -C /opt/
## 将cobar-manager的war包放到tomcat容器中
[root@mgs02 opt]# cp cobar-manager-1.0.5.war /opt/apache-tomcat-7.0.59/webapps/
## 启动tomcat
[root@mgs02 opt]# /opt/apache-tomcat-7.0.59/bin/startup.sh &
## 查看tomcat是否启动成功
[root@mgs02 opt]# ps -ef |grep tomcat
root 1354 1 71 22:10 pts/1 00:00:07 /usr/java/jdk1.7.0_75/jre/bin/java -Djava.util.logging.config.file=/opt/apache-tomcat-7.0.59/conf/logging.properties -Djava.util.logging.manager=org.apache.juli.ClassLoaderLogManager -Djava.endorsed.dirs=/opt/apache-tomcat-7.0.59/endorsed -classpath /opt/apache-tomcat-7.0.59/bin/bootstrap.jar:/opt/apache-tomcat-7.0.59/bin/tomcat-juli.jar -Dcatalina.base=/opt/apache-tomcat-7.0.59 -Dcatalina.home=/opt/apache-tomcat-7.0.59 -Djava.io.tmpdir=/opt/apache-tomcat-7.0.59/temp org.apache.catalina.startup.Bootstrap start
root 1374 1288 0 22:10 pts/1 00:00:00 grep tomcat
[root@mgs02 opt]# tail -f /opt/apache-tomcat-7.0.59/logs/catalina.out
Mar 31, 2015 10:10:27 PM org.apache.catalina.startup.HostConfig deployDirectory
INFO: Deploying web application directory /opt/apache-tomcat-7.0.59/webapps/examples
Mar 31, 2015 10:10:28 PM org.apache.catalina.startup.HostConfig deployDirectory
INFO: Deployment of web application directory /opt/apache-tomcat-7.0.59/webapps/examples has finished in 609 ms
Mar 31, 2015 10:10:28 PM org.apache.coyote.AbstractProtocol start
INFO: Starting ProtocolHandler ["http-bio-8080"]
Mar 31, 2015 10:10:28 PM org.apache.coyote.AbstractProtocol start
INFO: Starting ProtocolHandler ["ajp-bio-8009"]
Mar 31, 2015 10:10:28 PM org.apache.catalina.startup.Catalina start
INFO: Server startup in 6160 ms
[root@mgs02 opt]# mkdir /home/admin/xml/ -p
[root@mgs02 opt]# cd apache-tomcat-7.0.59/webapps/cobar-manager-1.0.5/WEB-INF/classes/
[root@mgs02 classes]# cp *.xml /home/admin/xml/
## 重启tomcat，然后浏览器中访问：
## 初始登录口令:root/123456
## 登录完成后，可以进行设置，图形界面的设置很简单，不详述，附几张图：