(编辑:jimmy 日期: 2024/12/25 浏览:2)
本文使用docker实现mysql主从配置,读写分离、分库分表等功能。
java
java version "1.8.0_111" Java(TM) SE Runtime Environment (build 1.8.0_111-b14) Java HotSpot(TM) 64-Bit Server VM (build 25.111-b14, mixed mode)
docker
Client: Version: 18.03.0-ce API version: 1.37 Go version: go1.9.4 Git commit: 0520e24 Built: Wed Mar 21 23:09:15 2018 OS/Arch: linux/amd64 Experimental: false Orchestrator: swarm Server: Engine: Version: 18.03.0-ce API version: 1.37 (minimum version 1.12) Go version: go1.9.4 Git commit: 0520e24 Built: Wed Mar 21 23:13:03 2018 OS/Arch: linux/amd64 Experimental: false
创建mysql主节点配置文件
mkdir /usr/local/mysql/master mkdir conf data
创建主节点配置文件docker.cnf
[mysqld] server-id=1 log-bin=master-bin #只是读写,就只要主库配置即可.如果要做主从切换,那么主库和从库都需要开启. skip-host-cache skip-name-resolve collation-server = utf8_unicode_ci init-connect='SET NAMES utf8' character-set-server = utf8 [mysql] default-character-set=utf8 [client] default-character-set=utf8
创建从节点配置文件 docker.conf
mkdir /usr/local/mysql/slave mkdir conf data
[mysqld] server-id=2 log-bin=master-bin skip-host-cache skip-name-resolve collation-server = utf8_unicode_ci init-connect='SET NAMES utf8' character-set-server = utf8 [mysql] default-character-set=utf8 [client] default-character-set=utf8
此处使用mariadb最新稳定镜像创建容器
创建主节点myslq
docker run --name master -p 3306:3306 -v /usr/local/mysql/master/conf:/etc/mysql/conf.d -v /usr/local/mysql/master/data:/var/lib/mysql -e MYSQL_ROOT_PASSWORD=123456 -idt mariadb:latest --character-set-server=utf8mb4 --collation-server=utf8mb4_unicode_ci
创建从节点mysql
docker run --name slave -p 3307:3306 -v /usr/local/mysql/slave/conf:/etc/mysql/conf.d -v /usr/local/mysql/slave/data:/var/lib/mysql -e MYSQL_ROOT_PASSWORD=123456 -idt mariadb:latest --character-set-server=utf8mb4 --collation-server=utf8mb4_unicode_ci
step 1 进入主节点
docker exec -it master /bin/bash mysql -uroot -p
step 2 创建用户
create user 'backUser'@'%' identified by 'root'; grant replication slave on *.* to 'backUser'@'%'; flush privileges; show master status; MariaDB [(none)]> show master status; +-------------------+----------+--------------+------------------+ | File | Position | Binlog_Do_DB | Binlog_Ignore_DB | +-------------------+----------+--------------+------------------+ | master-bin.000003 | 787 | | | +-------------------+----------+--------------+------------------+ 1 row in set (0.000 sec)
step 3 进入从节点创建用户开启同步
docker exec -it slave /bin/bash mysql -uroot -proot change master to master_host='192.168.92.51',master_port=3306,master_user='backUser',master_password='root',master_log_file='master-bin.000003',master_log_pos=787;
开启主从复制:
start slave;
从节点设置日志和文件名要跟主节点信息对应,包括日志记录起始位置position
检查主从复制是否OK
show slave status \G;
*************************** 1. row *************************** Slave_IO_State: Waiting for master to send event Master_Host: 192.168.92.50 Master_User: backUser Master_Port: 3306 Connect_Retry: 60 Master_Log_File: master-bin.000005 Read_Master_Log_Pos: 343 Relay_Log_File: mysqld-relay-bin.000002 Relay_Log_Pos: 556 Relay_Master_Log_File: master-bin.000005 Slave_IO_Running: Yes Slave_SQL_Running: Yes
Slave出现2个YES,代表主从复制设置成功。
下载mycat在50节点实现安装
tar -zxvf Mycat-server-1.6.7.1-release-20190213150257-linux.tar.gz mv mycat/ /usr/local/
修改mycat目录下 conf的server.xml 文件,指定用户名和密码
<"1.0" encoding="UTF-8"?> <!-- - - Licensed under the Apache License, Version 2.0 (the "License"); - you may not use this file except in compliance with the License. - You may obtain a copy of the License at - - http://www.apache.org/licenses/LICENSE-2.0 - - Unless required by applicable law or agreed to in writing, software - distributed under the License is distributed on an "AS IS" BASIS, - WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. - See the License for the specific language governing permissions and - limitations under the License. --> <!DOCTYPE mycat:server SYSTEM "server.dtd"> <mycat:server xmlns:mycat="http://io.mycat/"> <system> <property name="nonePasswordLogin">0</property> <!-- 0为需要密码登陆、1为不需要密码登陆 ,默认为0,设置为1则需要指定默认账户--> <property name="useHandshakeV10">1</property> <property name="useSqlStat">0</property> <!-- 1为开启实时统计、0为关闭 --> <property name="useGlobleTableCheck">0</property> <!-- 1为开启全加班一致性检测、0为关闭 --> <property name="sequnceHandlerType">0</property> <property name="subqueryRelationshipCheck">false</property> <property name="processorBufferPoolType">0</property> <property name="handleDistributedTransactions">0</property> <property name="useOffHeapForMerge">1</property> <!--单位为m--> <property name="memoryPageSize">64k</property> <!--单位为k--> <property name="spillsFileBufferSize">1k</property> <property name="useStreamOutput">0</property> <!--单位为m--> <property name="systemReserveMemorySize">384m</property> <!--是否采用zookeeper协调切换 --> <property name="useZKSwitch">false</property> <!-- XA Recovery Log日志名称 --> <!--<property name="XARecoveryLogBaseName">tmlog</property>--> <!--如果为 true的话 严格遵守隔离级别,不会在仅仅只有select语句的时候在事务中切换连接--> <property name="strictTxIsolation">false</property> <property name="useZKSwitch">true</property> </system> <user name="root"> <property name="password">123456</property> <property name="schemas">test</property> </user> </mycat:server>
上述配置,指定以root为用户名,密码为123456,访问虚拟逻辑数据库test。
配置rule规则
修改mycat conf 文件夹下的schema.xml 配置数据库对应规则
<"1.0"?> <!DOCTYPE mycat:schema SYSTEM "schema.dtd"> <mycat:schema xmlns:mycat="http://io.mycat/"> <schema name="test" checkSQLschema="false" sqlMaxLimit="100"> <table name="tb_user" primaryKey="id" autoIncrement="true" dataNode="dn1,dn2,dn3,dn4" rule="userrule" /> <table name="tb_category" primaryKey="id" dataNode="dn1,dn2,dn3,dn4" rule="categoryrule" /> </schema> <dataNode name="dn1" dataHost="localhost1" database="db1" /> <dataNode name="dn2" dataHost="localhost1" database="db2" /> <dataNode name="dn3" dataHost="localhost1" database="db3" /> <dataNode name="dn4" dataHost="localhost1" database="db4" /> <dataHost name="localhost1" maxCon="1000" minCon="10" balance="1" writeType="0" dbType="mysql" dbDriver="native" switchType="1" slaveThreshold="100"> <heartbeat>select user()</heartbeat> <!-- 读写分离配置 --> <writeHost host="hostM1" url="192.168.92.50:3306" user="root" password="123456"> <readHost host="hostS2" url="192.168.92.51:3307" user="root" password="123456" /> </writeHost> </dataHost> </mycat:schema>
上述配置scheam name 对应server配置文件的虚拟数据库,指定了2个表信息,tb_user 表主键实现自增长,有4个数据库节点,使用userrule表规则。
dataNode 指定了真实对应的物理数据库节点,对应dataHost说明了读写指定的用户和节点信息。
配置表分片规则文件rule.xml
<"1.0" encoding="UTF-8"?> <!-- - - Licensed under the Apache License, Version 2.0 (the "License"); - you may not use this file except in compliance with the License. - You may obtain a copy of the License at - - http://www.apache.org/licenses/LICENSE-2.0 - - Unless required by applicable law or agreed to in writing, software - distributed under the License is distributed on an "AS IS" BASIS, - WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. - See the License for the specific language governing permissions and - limitations under the License. --> <!DOCTYPE mycat:rule SYSTEM "rule.dtd"> <mycat:rule xmlns:mycat="http://io.mycat/"> <!-- 配置数据库规则 --> <tableRule name="userrule"> <rule> <columns>id</columns> <algorithm>func1</algorithm> </rule> </tableRule> <!-- 配置数据库test tb_category规则 --> <tableRule name="categoryrule"> <rule> <columns>id</columns> <algorithm>jump-consistent-hash</algorithm> </rule> </tableRule> <function name="murmur" class="io.mycat.route.function.PartitionByMurmurHash"> <property name="seed">0</property><!-- 默认是0 --> <property name="count">2</property><!-- 要分片的数据库节点数量,必须指定,否则没法分片 --> <property name="virtualBucketTimes">160</property><!-- 一个实际的数据库节点被映射为这么多虚拟节点,默认是160倍,也就是虚拟节点数是物理节点数的160倍 --> <!-- <property name="weightMapFile">weightMapFile</property> 节点的权重,没有指定权重的节点默认是1。以properties文件的格式填写,以从0开始到count-1的整数值也就是节点索引为key,以节点权重值为值。所有权重值必须是正整数,否则以1代替 --> <!-- <property name="bucketMapPath">/etc/mycat/bucketMapPath</property> 用于测试时观察各物理节点与虚拟节点的分布情况,如果指定了这个属性,会把虚拟节点的murmur hash值与物理节点的映射按行输出到这个文件,没有默认值,如果不指定,就不会输出任何东西 --> </function> <function name="crc32slot" class="io.mycat.route.function.PartitionByCRC32PreSlot"> </function> <function name="hash-int" class="io.mycat.route.function.PartitionByFileMap"> <property name="mapFile">partition-hash-int.txt</property> </function> <function name="rang-long" class="io.mycat.route.function.AutoPartitionByLong"> <property name="mapFile">autopartition-long.txt</property> </function> <function name="mod-long" class="io.mycat.route.function.PartitionByMod"> <!-- how many data nodes --> <property name="count">3</property> </function> <function name="func1" class="io.mycat.route.function.PartitionByLong"> <property name="partitionCount">8</property> <property name="partitionLength">128</property> </function> <function name="latestMonth" class="io.mycat.route.function.LatestMonthPartion"> <property name="splitOneDay">24</property> </function> <function name="partbymonth" class="io.mycat.route.function.PartitionByMonth"> <property name="dateFormat">yyyy-MM-dd</property> <property name="sBeginDate">2015-01-01</property> </function> <function name="rang-mod" class="io.mycat.route.function.PartitionByRangeMod"> <property name="mapFile">partition-range-mod.txt</property> </function> <function name="jump-consistent-hash" class="io.mycat.route.function.PartitionByJumpConsistentHash"> <property name="totalBuckets">3</property> </function> </mycat:rule>
上述文件重点关注第一个tableRule、rule指定了分片规则在哪个表字段,algorithm指定了分片的算法,其中 func1 与文件后面function名称为func1对应,此处使用了PartitionByLong分片算法。
conf下增加sequence_conf.properties文件,其内容如下:
TB_USER.HISIDS= TB_USER.MINID=1 TB_USER.MAXID=20000 TB_USER.CURID=1
主要申明了主键增长的策略。
master节点手动创建4个数据库db1,db2,db3,db4 (不要操作从节点)
此时打开slave节点,会观察到slave也会自动创建4个数据库。
使用命令 ./mycat start 开启mycat
./mycat start 启动
./mycat stop 停止
./mycat console 前台运行
./mycat restart 重启服务
./mycat pause 暂停
./mycat status 查看启动状态
如果启动失败,请查看 /usr/local/mycat的wrapper.log 日志文件信息。
FATAL | wrapper | 2019/04/21 14:36:09 | ERROR: Could not write pid file /usr/local/mycat/logs/mycat.pid: No such file or directory
如果遇到上述错误,请在mycat 目录创建logs 文件夹,重新启动即可。
[root@localhost mycat]# bin/mycat status Mycat-server is running (5065).
上述消息则表示mycat启动成功。
firewall-cmd --zone=public --add-port=8066/tcp --permanent firewall-cmd --zone=public --add-port=9066/tcp --permanent firewall-cmd --reload
使用docker镜像开启mycat容器实例
docker run --name mycat -v /usr/local/mycat/conf/schema.xml:/usr/local/mycat/conf/schema.xml -v /usr/local/mycat/conf/rule.xml:/usr/local/mycat/conf/rule.xml -v /usr/local/mycat/conf/server.xml:/usr/local/mycat/conf/server.xml -v /usr/local/mycat/conf/sequence_conf.properties:/usr/local/mycat/conf/sequence_conf.properties --privileged=true -p 8066:8066 -p 9066:9066 -e MYSQL_ROOT_PASSWORD=123456 -d longhronshens/mycat-docker
或者关闭防火墙。
使用navicate连接mycat,端口8066(9066为管理端口)
使用命令连接mycat
[root@localhost ~]# mysql -h127.0.0.1 -uroot -p123456 -P8066 Welcome to the MariaDB monitor. Commands end with ; or \g. Your MySQL connection id is 12 Server version: 5.6.29-mycat-1.6.7.1-release-20190213150257 MyCat Server (OpenCloudDB) Copyright (c) 2000, 2017, Oracle, MariaDB Corporation Ab and others. Type 'help;' or '\h' for help. Type '\c' to clear the current input statement. MySQL [(none)]>
管理端命令:
mysql -h127.0.0.1 -uroot -proot -P9066
查看虚拟逻辑库:
MySQL [(none)]> show databases; +----------+ | DATABASE | +----------+ | test | +----------+ 1 row in set (0.00 sec) MySQL [(none)]>
使用逻辑库创建表:
MySQL [(none)]> use test; CREATE TABLE `tb_user` ( `id` bigint(20) NOT NULL AUTO_INCREMENT, `username` varchar(50) CHARACTER SET utf8 COLLATE utf8_general_ci NOT NULL COMMENT '用户名', `password` varchar(32) CHARACTER SET utf8 COLLATE utf8_general_ci NOT NULL COMMENT '密码,加密存储', `phone` varchar(20) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL COMMENT '注册手机号', `email` varchar(50) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL COMMENT '注册邮箱', `created` datetime(0) NOT NULL, `updated` datetime(0) NOT NULL, PRIMARY KEY (`id`) USING BTREE, UNIQUE INDEX `username`(`username`) USING BTREE, UNIQUE INDEX `phone`(`phone`) USING BTREE, UNIQUE INDEX `email`(`email`) USING BTREE ) ENGINE = InnoDB AUTO_INCREMENT = 54 CHARACTER SET = utf8 COLLATE = utf8_general_ci COMMENT = '用户表' ROW_FORMAT = Compact;
可以看到mycat,mysql主从都创建了该表
在创建一张表:
CREATE TABLE `tb_category` ( `id` varchar(5) CHARACTER SET utf8 COLLATE utf8_general_ci NOT NULL, `name` varchar(200) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL COMMENT '名字', `sort_order` int(4) NOT NULL DEFAULT 1 COMMENT '排列序号,表示同级类目的展现次序,如数值相等则按名称次序排列。取值范围:大于零的整数', `created` datetime(0) NULL DEFAULT NULL, `updated` datetime(0) NULL DEFAULT NULL, PRIMARY KEY (`id`) USING BTREE, INDEX `updated`(`updated`) USING BTREE ) ENGINE = InnoDB CHARACTER SET = utf8 COLLATE = utf8_general_ci ROW_FORMAT = Compact;
插入一条数据:
INSERT INTO `tb_user`(id,username,password,phone,email,created,updated) VALUES (7, 'zhangsan', 'e10adc3949ba59abbe56e057f20f883e', '13488888888', 'aa@a', '2015-04-06 17:03:55', '2015-04-06 17:03:55');
为测试分库效果,我们插入不同ID的数据来观察一下:
INSERT INTO `tb_user`(id,username,password,phone,email,created,updated) VALUES (128, 'zhang02', 'e10adc3949ba59abbe56e057f20f88ss', '13488888882', 'aa@01.com', '2015-04-06 17:03:57', '2015-04-06 17:04:55'); INSERT INTO `tb_user`(id,username,password,phone,email,created,updated) VALUES (256, 'zhang03', 'e10adc3949ba59abbe56e057f20f88ss', '13488888883', 'aa@02.com', '2015-04-06 17:03:57', '2015-04-06 17:04:55'); INSERT INTO `tb_user`(id,username,password,phone,email,created,updated) VALUES (384, 'zhang05', 'e10adc3949ba59abbe56e057f20f88ss', '13488888885', 'aa@05.com', '2015-04-06 17:03:57', '2015-04-06 17:04:55');
可以看到数据分别分布在db1/db2/db3/db4,分布的规则取决于插入数据的主键在rule.xml 设置的分片规则约束。
查看mycat节点健康状态,在主节点输入如下命令:
[root@localhost ~]# mysql -h127.0.0.1 -uroot -p123456 -P9066 Welcome to the MariaDB monitor. Commands end with ; or \g. Your MySQL connection id is 16 Server version: 5.6.29-mycat-1.6.7.1-release-20190213150257 MyCat Server (monitor) Copyright (c) 2000, 2017, Oracle, MariaDB Corporation Ab and others. Type 'help;' or '\h' for help. Type '\c' to clear the current input statement. MySQL [(none)]> show @@heartbeat; +--------+-------+---------------+------+---------+-------+--------+---------+--------------+---------------------+-------+ | NAME | TYPE | HOST | PORT | RS_CODE | RETRY | STATUS | TIMEOUT | EXECUTE_TIME | LAST_ACTIVE_TIME | STOP | +--------+-------+---------------+------+---------+-------+--------+---------+--------------+---------------------+-------+ | hostM1 | mysql | 192.168.92.50 | 3306 | 1 | 0 | idle | 30000 | 1,9,6 | 2019-04-21 20:44:40 | false | | hostS2 | mysql | 192.168.92.51 | 3307 | 1 | 0 | idle | 30000 | 1,9,67381 | 2019-04-21 20:44:40 | false | +--------+-------+---------------+------+---------+-------+--------+---------+--------------+---------------------+-------+ 2 rows in set (0.36 sec)
上述 RS_CODE 1代表节点正常,-1代表节点异常。
查询mycat所有命令:
MySQL [(none)]> show @@help; +--------------------------------------------------------------+--------------------------------------------+ | STATEMENT | DESCRIPTION | +--------------------------------------------------------------+--------------------------------------------+ | show @@time.current | Report current timestamp | | show @@time.startup | Report startup timestamp | | show @@version | Report Mycat Server version | | show @@server | Report server status | | show @@threadpool | Report threadPool status | | show @@database | Report databases | | show @@datanode | Report dataNodes | | show @@datanode where schema = "text-align: center">修改schema.xml 文件属性checkSQLschema:
<schema name="test" checkSQLschema="true" sqlMaxLimit="100">遇到如下错误:
jvm 1 | Caused by: io.mycat.config.util.ConfigException: org.xml.sax.SAXParseException; lineNumber: 97; columnNumber: 42; Attribute "defaultAccount" must be declared for element type "user". jvm 1 | at io.mycat.config.loader.xml.XMLServerLoader.load(XMLServerLoader.java:111) jvm 1 | at io.mycat.config.loader.xml.XMLServerLoader.<init>(XMLServerLoader.java:69) jvm 1 | at io.mycat.config.loader.xml.XMLConfigLoader.<init>(XMLConfigLoader.java:56) jvm 1 | at io.mycat.config.ConfigInitializer.<init>(ConfigInitializer.java:77) jvm 1 | at io.mycat.config.MycatConfig.<init>(MycatConfig.java:72) jvm 1 | at io.mycat.MycatServer.<init>(MycatServer.java:144) jvm 1 | at io.mycat.MycatServer.<clinit>(MycatServer.java:96) jvm 1 | ... 7 more jvm 1 | Caused by: org.xml.sax.SAXParseException; lineNumber: 97; columnNumber: 42; Attribute "defaultAccount" must be declared for element type "user".请修改server.xml 文件,将user模块的defaultAccount取消:
<user name="root" > <property name="password">123456</property> <property name="schemas">test</property> </user>最后放一张mycat查询结果截图:
总结
以上就是这篇文章的全部内容了,希望本文的内容对大家的学习或者工作具有一定的参考学习价值,谢谢大家对的支持。