小知识：Docker 部署 Mysql8.0的方法示例

1.参照官网，安装docker 

2.拉取mysql镜像（默认拉取最新的镜像）8.0.11

dockerpullmysql

3.在宿主机创建持久化mysqldata及mysql.cnf 

mkdir/usr/local/mysqlData/test/cnf mkdir/usr/local/mysqlData/test/data vi/usr/loal/mysqlData/test/cnf/mysql.cnf

   设置本地文件共享：

    Docker->Preferences…->FileSharing

4.添加操作权限 

chmod777/usr/local/mysqlData/test/data    备注：挂载时权限验证（操作权限）

5.运行镜像，设置初始密码、本机与docker端口的映射与挂载本地数据盘(启动msyql服务)

dockerrun-itd-p3307:3306–nametest_mysql-v/usr/local/mysqlData/test/conf:/etc/mysql -v/usr/local/mysqlData/test/data:/var/lib/mysql-eMYSQL_ROOT_PASSWORD=123456mysql

运行结果：

6.进入test_mysql容器

Dockerexec-ittest_mysqlbash

如图：

7.在容器内登录mysql

8.查看用户信息

mysql>selectuser,host,authentication_stringfrommysql.user; +——————+———–+————————————————————————+ |user|host|authentication_string| +——————+———–+————————————————————————+ |root|%|$A$005$7o{|AomAw(QvF#.p5wLtCnrG6yX6XQdDVQivGr96POVL.gKnhIAhUhl3.| |mysql.infoschema|localhost|*THISISNOTAVALIDPASSWORDTHATCANBEUSEDHERE| |mysql.session|localhost|*THISISNOTAVALIDPASSWORDTHATCANBEUSEDHERE| |mysql.sys|localhost|*THISISNOTAVALIDPASSWORDTHATCANBEUSEDHERE| |root|localhost|$A$005$0.-%i)H{uYi@zFo7uYF82fYw7DsA93vYLr4uZv6I1tSKao0sbzzcDap3| +——————+———–+————————————————————————+ 5rowsinset(0.00sec)

9.设置权限（为root分配权限，以便可以远程连接）

mysql>grantallPRIVILEGESon*.*toroot@%WITHGRANTOPTION; QueryOK,0rowsaffected(0.01sec)

10.由于Mysql5.6以上的版本修改了Password算法，这里需要更新密码算法，便于使用Navicat连接

mysql>grantallPRIVILEGESon*.*toroot@%WITHGRANTOPTION; QueryOK,0rowsaffected(0.01sec) mysql>ALTERuserroot@%IDENTIFIEDBY123456PASSWORDEXPIRENEVER; QueryOK,0rowsaffected(0.11sec) mysql>ALTERuserroot@%IDENTIFIEDWITHmysql_native_passwordBY123456; QueryOK,0rowsaffected(0.11sec) mysql>FLUSHPRIVILEGES; QueryOK,0rowsaffected(0.01sec)

11.使用navicat连接mysql,如图：

12.建库、建表、加数据

查看挂载本地数据盘的内容：

13.测试将容器移除后，数据是否仍然存在

dockerrm-ftest_msyql

容器已经移除了。重新部署test_mysql,参照第5的步骤，进入新容器，访问数据库：

xushijiandeiMac:dataxushijian$dockerrun-itd-p3307:3306–nametest_mysql-v/usr/local/mysqlData/test/conf:/etc/mysql-v/usr/local/mysqlData/test/data:/var/lib/mysql-eMYSQL_ROOT_PASSWORD=123456mysql 65b7a60050aaef5765ed055acfd071c7c76f60e85dc25d0e73e0d56eae14aed1 xushijiandeiMac:dataxushijian$dockerexec-ittest_mysqlbash root@65b7a60050aa:/#mysql-uroot-p Enterpassword: WelcometotheMySQLmonitor.Commandsendwith;or\g. YourMySQLconnectionidis8 Serverversion:8.0.11MySQLCommunityServer-GPL Copyright(c)2000,2018,Oracleand/oritsaffiliates.Allrightsreserved. OracleisaregisteredtrademarkofOracleCorporationand/orits affiliates.Othernamesmaybetrademarksoftheirrespective owners. Typehelp;or\hforhelp.Type\ctoclearthecurrentinputstatement. mysql>showdatabases; +——————–+ |Database| +——————–+ |information_schema| |mysql| |performance_schema| |sys| |test| +——————–+ 5rowsinset(0.01sec) mysql>usetest; Readingtableinformationforcompletionoftableandcolumnnames Youcanturnoffthisfeaturetogetaquickerstartupwith-A Databasechanged mysql>select*fromuser_user; +———+———–+————-+——–+ |user_id|user_name|phone|note| +———+———–+————-+——–+ |1|没长正|13980000000|测试| +———+———–+————-+——–+ 1rowinset(0.06sec)

发现数据仍然可以使用，不需要额外的配置，实现了数据的持久化。

阿里云上docker部署MySQL(通过编排模板部署)

<1.配置同第3步类似（只是目录变化）

master: image:mysql:latest environment: -MYSQL_ROOT_PASSWORD=123456 ports: -3307:3306/tcp volumes: -/usr/local/mysqlData/master/conf:/etc/mysql:rw -/usr/local/mysqlData/master/data:/var/lib/mysql:rw labels: aliyun.scale:1

<2.如下图,已部署完成

[root@c13a6d832fd0a49398c62002361d75c60-node1~]#clear [root@c13a6d832fd0a49398c62002361d75c60-node1~]#dockerps CONTAINERIDIMAGECOMMANDCREATEDSTATUSPORTSNAMES 8597b7539a3amysql:latest”docker-entrypoint…”3minutesagoUp3minutes0.0.0.0:3307->3306/tcpmysql_master_1

<3.进入容器，进行权限设置，后续过程参照本机

[root@c13a6d832fd0a49398c62002361d75c60-node1/]#dockerexec-itmysql_master_1bash root@2fc0bbf48941-mysql-master-1:/#mysql-uroot-p Enterpassword: WelcometotheMySQLmonitor.Commandsendwith;or\g. YourMySQLconnectionidis8 Serverversion:8.0.11MySQLCommunityServer-GPL Copyright(c)2000,2018,Oracleand/oritsaffiliates.Allrightsreserved. OracleisaregisteredtrademarkofOracleCorporationand/orits affiliates.Othernamesmaybetrademarksoftheirrespective owners. Typehelp;or\hforhelp.Type\ctoclearthecurrentinputstatement. mysql>

<4.开放3307端口，使得外网可以访问

     云服务器ECS->安全组->选择所在的地区->配置规则->添加安全组

添加安全组，如图：

5.外网访问，如下图

已连接成功。

主从环境搭建：

主库：

[root@c13a6d832fd0a49398c62002361d75c60-node1~]#dockerexec-itmysql_master_1bash root@2fc0bbf48941-mysql-master-1:/#mysql-uroot-p Enterpassword: WelcometotheMySQLmonitor.Commandsendwith;or\g. YourMySQLconnectionidis9 Serverversion:8.0.11MySQLCommunityServer-GPL Copyright(c)2000,2018,Oracleand/oritsaffiliates.Allrightsreserved. OracleisaregisteredtrademarkofOracleCorporationand/orits affiliates.Othernamesmaybetrademarksoftheirrespective owners. Typehelp;or\hforhelp.Type\ctoclearthecurrentinputstatement. mysql>showdatabases; +——————–+ |Database| +——————–+ |information_schema| |mysql| |performance_schema| |sys| +——————–+ 4rowsinset(0.30sec) mysql>createdatabasetest; QueryOK,1rowaffected(0.12sec) mysql>showdatabase; ERROR1064(42000):YouhaveanerrorinyourSQLsyntax;checkthemanualthatcorrespondstoyourMySQLserverversionfortherightsyntaxtouseneardatabaseatline1 mysql>showdatabases; +——————–+ |Database| +——————–+ |information_schema| |mysql| |performance_schema| |sys| |test| +——————–+ 5rowsinset(0.00sec)

从库：   

[root@c13a6d832fd0a49398c62002361d75c60-node1~]#dockerexec-itmysql-slave_slave_1bash root@c8661e16e3fd-mysql-slave-slave-1:/#mysql-uroot-p Enterpassword: WelcometotheMySQLmonitor.Commandsendwith;or\g. YourMySQLconnectionidis10 Serverversion:8.0.11MySQLCommunityServer-GPL Copyright(c)2000,2018,Oracleand/oritsaffiliates.Allrightsreserved. OracleisaregisteredtrademarkofOracleCorporationand/orits affiliates.Othernamesmaybetrademarksoftheirrespective owners. Typehelp;or\hforhelp.Type\ctoclearthecurrentinputstatement. mysql>showdatabases; +——————–+ |Database| +——————–+ |information_schema| |mysql| |performance_schema| |sys| +——————–+ 4rowsinset(0.40sec) mysql>showslavestatus\G ***************************1.row*************************** Slave_IO_State:Waitingformastertosendevent主从配置成功！ Master_Host:47.94.225.124 Master_User:rep Master_Port:3307 Connect_Retry:60 Master_Log_File:binlog.000003 Read_Master_Log_Pos:155 Relay_Log_File:c8661e16e3fd-mysql-slave-slave-1-relay-bin.000004 Relay_Log_Pos:363 Relay_Master_Log_File:binlog.000003 Slave_IO_Running:Yes Slave_SQL_Running:Yes Replicate_Do_DB: Replicate_Ignore_DB: Replicate_Do_Table: Replicate_Ignore_Table: Replicate_Wild_Do_Table: Replicate_Wild_Ignore_Table: Last_Errno:0 Last_Error: Skip_Counter:0 Exec_Master_Log_Pos:155 Relay_Log_Space:762 Until_Condition:None Until_Log_File: Until_Log_Pos:0 Master_SSL_Allowed:No Master_SSL_CA_File: Master_SSL_CA_Path: Master_SSL_Cert: Master_SSL_Cipher: Master_SSL_Key: Seconds_Behind_Master:0 Master_SSL_Verify_Server_Cert:No Last_IO_Errno:0 Last_IO_Error: Last_SQL_Errno:0 Last_SQL_Error: Replicate_Ignore_Server_Ids: Master_Server_Id:1 Master_UUID:a482f5fe-80fb-11e8-9fb1-0242ac12020c Master_Info_File:mysql.slave_master_info SQL_Delay:0 SQL_Remaining_Delay:NULL Slave_SQL_Running_State:Slavehasreadallrelaylog;waitingformoreupdates Master_Retry_Count:86400 Master_Bind: Last_IO_Error_Timestamp: Last_SQL_Error_Timestamp: Master_SSL_Crl: Master_SSL_Crlpath: Retrieved_Gtid_Set: Executed_Gtid_Set: Auto_Position:0 Replicate_Rewrite_DB: Channel_Name: Master_TLS_Version: Master_public_key_path: Get_master_public_key:0 1rowinset(0.00sec) mysql>showdatabases; +——————–+ |Database| +——————–+ |information_schema| |mysql| |performance_schema| |sys| +——————–+ 4rowsinset(1.01sec) mysql>showdatabase; ERROR1064(42000):YouhaveanerrorinyourSQLsyntax;checkthemanualthatcorrespondstoyourMySQLserverversionfortherightsyntaxtouseneardatabaseatline1 mysql>showdatabases; +——————–+ |Database| +——————–+ |information_schema| |mysql| |performance_schema| |sys| |test| +——————–+ 5rowsinset(0.00sec)

主从库原理分析：

i/o线程去请求主库的binlog，并将得到的binlog日志写到relaylog（中继日志）文件中；主库会生成一个logdump线程，用来给从库i/o线程传binlog；  

SQL线程，会读取relaylog文件中的日志，并解析成具体操作，来实现主从的操作一致，而最终数据一致；

即：从库IO线程请求->中继日志->获取binlog->从库SQL线程，解析

参考：

    https://docs.docker.com/ docker 官网文档

    https://blog.csdn.net/gf0515/article/details/80466213 Mac Navicat连接Docker  MySql8.0

   docker mysql 主从复制

    https://blog.csdn.net/qq_28804275/article/details/80891951 主从环境搭建

    docker mysql Dockerfile mysql 开源镜像Dockerfile及配置

    https://www.cnblogs.com/Aiapple/p/5792939.html 主从复制原理、高可用分析

    http://www.cnblogs.com/Aiapple/p/5793786.html 实战

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原文链接：https://blog.csdn.net/xsj34567/article/details/80940238