docker compose mysql主从复制及orchestrator高可用使用-编程知识

1.orchestrator 功能演示：

1.1 多级级联：

1.2 主从切换：

切换成功后，原来的主库是红色的，需要在主库的配置页面点击“start replication ”，重新连接上新的主库。

1.3 主从故障，从库自动切换新主库

2.mysql主从复制搭建

参考地址：https://www.jb51.net/server/3105779cp.htmhttps://www.jb51.net/server/3105779cp.htm

主库my.cnf配置文件如下：

[mysqld]
log-bin=mysql-bin
server-id=1
report_host=172.22.0.103
log-slave-updates=1
# 启用GTID模式
gtid_mode=ON
# 确保一致性
enforce_gtid_consistency=ON
# 使用表格存储master信息
master_info_repository=TABLE
# 使用表格存储relay log信息
relay_log_info_repository=TABLE
# 设置binlog格式为ROW
binlog_format=ROW

其他数据库的my.cnf只需要修改server-id和report_host就行了。

docker compose 配置文件如下：

version: "3"services:mysql-master:container_name: mysql-masterhostname: mysql-masterimage: mysql:5.7.30restart: alwaysenvironment:MYSQL_ROOT_PASSWORD: test123456ports:- "3307:3306"networks:mysql-network:ipv4_address: 172.22.0.103volumes:- ./mysql1/conf/my.cnf:/etc/my.cnf- ./mysql1/data:/var/lib/mysqlmysql-slave:container_name: mysql-slavehostname: mysql-slaveimage: mysql:5.7.30restart: alwaysenvironment:MYSQL_ROOT_PASSWORD: test123456ports:- "3308:3306"networks:mysql-network:ipv4_address: 172.22.0.104volumes:- ./mysql2/conf/my.cnf:/etc/my.cnf- ./mysql2/data:/var/lib/mysqlmysql-slave2:container_name: mysql-slave2hostname: mysql-slave2image: mysql:5.7.30restart: alwaysenvironment:MYSQL_ROOT_PASSWORD: test123456ports:- "3309:3306"networks:mysql-network:ipv4_address: 172.22.0.105volumes:- ./mysql3/conf/my.cnf:/etc/my.cnf- ./mysql3/data:/var/lib/mysql
networks:mysql-network:driver: bridgeipam:config:- subnet: 172.22.0.0/16

主从复制使用gtid，

主库需要执行的sql：

create user 'repl_user'@'%' identified by 'test123456';
grant replication slave on *.* to 'repl_user'@'%';

从库需要执行的sql：

stop slave ;CHANGE MASTER TO MASTER_HOST='192.168.0.62', MASTER_PORT=3306, MASTER_USER='repl_user',
MASTER_PASSWORD='test123456',master_auto_position=1;start slave;show slave status;--主从切换时要用到，提前创建好用户create user 'repl_user'@'%' identified by 'test123456';
grant replication slave on *.* to 'repl_user'@'%';

检查主从同步是否配置好，在主库执行以下sql：

show slave hosts;

主从复制正常时，显示如下：

3.orchestrator 搭建

参考地址：Orchestrator实现MySQL故障切换 - 墨天轮 (modb.pro)

orchestrator.conf.json配置文件如下：

{"Debug": true,"EnableSyslog": false,"ListenAddress": ":3000","MySQLTopologyUser": "orc_client_user","MySQLTopologyPassword": "test123456","MySQLTopologyCredentialsConfigFile": "","MySQLTopologySSLPrivateKeyFile": "","MySQLTopologySSLCertFile": "","MySQLTopologySSLCAFile": "","MySQLTopologySSLSkipVerify": true,"MySQLTopologyUseMutualTLS": false,"MySQLOrchestratorHost": "172.22.0.102","MySQLOrchestratorPort": 3306,"MySQLOrchestratorDatabase": "orcdb","MySQLOrchestratorUser": "orc1","MySQLOrchestratorPassword": "orc123456","MySQLOrchestratorCredentialsConfigFile": "","MySQLOrchestratorSSLPrivateKeyFile": "","MySQLOrchestratorSSLCertFile": "","MySQLOrchestratorSSLCAFile": "","MySQLOrchestratorSSLSkipVerify": true,"MySQLOrchestratorUseMutualTLS": false,"MySQLConnectTimeoutSeconds": 1,"RaftEnabled": true,"RaftDataDir": "/var/lib/orchestrator","RaftBind": "172.22.0.91",	"DefaultRaftPort": 10008,"RaftNodes": ["172.22.0.91","172.22.0.92","172.22.0.93"], "DefaultInstancePort": 3306,"DiscoverByShowSlaveHosts": false,"InstancePollSeconds": 5,"DiscoveryIgnoreReplicaHostnameFilters": ["a_host_i_want_to_ignore[.]example[.]com",".*[.]ignore_all_hosts_from_this_domain[.]example[.]com","a_host_with_extra_port_i_want_to_ignore[.]example[.]com:3307"],"UnseenInstanceForgetHours": 240,"SnapshotTopologiesIntervalHours": 0,"InstanceBulkOperationsWaitTimeoutSeconds": 10,"HostnameResolveMethod": "default","MySQLHostnameResolveMethod": "@@hostname","SkipBinlogServerUnresolveCheck": true,"ExpiryHostnameResolvesMinutes": 60,"RejectHostnameResolvePattern": "","ReasonableReplicationLagSeconds": 10,"ProblemIgnoreHostnameFilters": [],"VerifyReplicationFilters": false,"ReasonableMaintenanceReplicationLagSeconds": 20,"CandidateInstanceExpireMinutes": 60,"AuditLogFile": "","AuditToSyslog": false,"RemoveTextFromHostnameDisplay": ".mydomain.com:3306","ReadOnly": false,"AuthenticationMethod": "","HTTPAuthUser": "","HTTPAuthPassword": "","AuthUserHeader": "","PowerAuthUsers": ["*"],"ClusterNameToAlias": {"127.0.0.1": "test suite"},"ReplicationLagQuery": "","DetectClusterAliasQuery": "SELECT SUBSTRING_INDEX(@@hostname, '.', 1)","DetectClusterDomainQuery": "","DetectInstanceAliasQuery": "","DetectPromotionRuleQuery": "","DataCenterPattern": "[.]([^.]+)[.][^.]+[.]mydomain[.]com","PhysicalEnvironmentPattern": "[.]([^.]+[.][^.]+)[.]mydomain[.]com","PromotionIgnoreHostnameFilters": [],"DetectSemiSyncEnforcedQuery": "","ServeAgentsHttp": false,"AgentsServerPort": ":3001","AgentsUseSSL": false,"AgentsUseMutualTLS": false,"AgentSSLSkipVerify": false,"AgentSSLPrivateKeyFile": "","AgentSSLCertFile": "","AgentSSLCAFile": "","AgentSSLValidOUs": [],"UseSSL": false,"UseMutualTLS": false,"SSLSkipVerify": false,"SSLPrivateKeyFile": "","SSLCertFile": "","SSLCAFile": "","SSLValidOUs": [],"URLPrefix": "","StatusEndpoint": "/api/status","StatusSimpleHealth": true,"StatusOUVerify": false,"AgentPollMinutes": 60,"UnseenAgentForgetHours": 6,"StaleSeedFailMinutes": 60,"SeedAcceptableBytesDiff": 8192,"PseudoGTIDPattern": "","PseudoGTIDPatternIsFixedSubstring": false,"PseudoGTIDMonotonicHint": "asc:","DetectPseudoGTIDQuery": "","BinlogEventsChunkSize": 10000,"SkipBinlogEventsContaining": [],"ReduceReplicationAnalysisCount": true,"FailureDetectionPeriodBlockMinutes": 60,"FailMasterPromotionOnLagMinutes": 0,"RecoveryPeriodBlockSeconds": 60,"RecoveryIgnoreHostnameFilters": [],"RecoverMasterClusterFilters": ["*"],"RecoverIntermediateMasterClusterFilters": ["*"],"OnFailureDetectionProcesses": ["echo 'Detected {failureType} on {failureCluster}. Affected replicas: {countSlaves}' >> /tmp/recovery.log"],"PreGracefulTakeoverProcesses": ["echo 'Planned takeover about to take place on {failureCluster}. Master will switch to read_only' >> /tmp/recovery.log"],"PreFailoverProcesses": ["echo 'Will recover from {failureType} on {failureCluster}' >> /tmp/recovery.log"],"PostFailoverProcesses": ["echo '(for all types) Recovered from {failureType} on {failureCluster}. Failed: {failedHost}:{failedPort}; Successor: {successorHost}:{successorPort}' >> /tmp/recovery.log"],"PostUnsuccessfulFailoverProcesses": [],"PostMasterFailoverProcesses": ["echo 'Recovered from {failureType} on {failureCluster}. Failed: {failedHost}:{failedPort}; Promoted: {successorHost}:{successorPort}' >> /tmp/recovery.log"],"PostIntermediateMasterFailoverProcesses": ["echo 'Recovered from {failureType} on {failureCluster}. Failed: {failedHost}:{failedPort}; Successor: {successorHost}:{successorPort}' >> /tmp/recovery.log"],"PostGracefulTakeoverProcesses": ["echo 'Planned takeover complete' >> /tmp/recovery.log"],"CoMasterRecoveryMustPromoteOtherCoMaster": true,"DetachLostSlavesAfterMasterFailover": true,"ApplyMySQLPromotionAfterMasterFailover": true,"PreventCrossDataCenterMasterFailover": false,"PreventCrossRegionMasterFailover": false,"MasterFailoverDetachReplicaMasterHost": false,"MasterFailoverLostInstancesDowntimeMinutes": 0,"PostponeReplicaRecoveryOnLagMinutes": 0,"OSCIgnoreHostnameFilters": [],"GraphiteAddr": "","GraphitePath": "","GraphiteConvertHostnameDotsToUnderscores": true,"ConsulAddress": "","ConsulAclToken": "","ConsulKVStoreProvider": "consul"
}

多个orchestrator.conf.json需要修改的地方如下：

"MySQLTopologyUser": "orc_client_user","MySQLTopologyPassword": "test123456",......"MySQLOrchestratorHost": "172.22.0.102","MySQLOrchestratorPort": 3306,"MySQLOrchestratorDatabase": "orcdb","MySQLOrchestratorUser": "orc1","MySQLOrchestratorPassword": "orc123456",......"AuthenticationMethod": "basic","HTTPAuthUser": "admin","HTTPAuthPassword": "uq81sgca1da",  "RaftEnabled":true,"RaftDataDir":"/usr/local/orchestrator/raftdata","RaftBind": "172.22.0.91",	"DefaultRaftPort": 10008,"RaftNodes": ["172.22.0.91","172.22.0.92","172.22.0.93"], ......"RecoveryPeriodBlockSeconds": 60,"RecoveryIgnoreHostnameFilters": [],"RecoverMasterClusterFilters": ["*"],"RecoverIntermediateMasterClusterFilters": ["*"],......

MySQLTopologyUser是orchestrator监听mysql主从数据库时使用的用户

MySQLOrchestratorUser是orchestrator自身需要的数据库

在主库和从库执行以下sql，创建MySQLTopologyUser：

create user 'orc_client_user'@'%' identified by 'test123456'; 
GRANT ALL PRIVILEGES ON *.* TO 'orc_client_user'@'%';

在orchestrator自身的数据库（这个数据库是独立的，不在三个mysql主从库之中）执行以下sql，创建MySQLOrchestratorUser：

CREATE USER 'orc1'@'%' IDENTIFIED BY 'orc123456';
GRANT ALL PRIVILEGES ON *.* TO 'orc1'@'%';

成功启动后，如下图：

4.完整的docker-compose.yml文件

version: "3"services:# orchestrator 监控orchestrator-test1:container_name: orchestrator-test1image: openarkcode/orchestrator:latestrestart: alwaysports:- "3000:3000"networks:mysql-network:ipv4_address: 172.22.0.91volumes:- ./orchestrator.conf.json:/etc/orchestrator.conf.jsonorchestrator-test2:container_name: orchestrator-test2image: openarkcode/orchestrator:latestrestart: alwaysports:- "3002:3000"networks:mysql-network:ipv4_address: 172.22.0.92volumes:- ./orchestrator2.conf.json:/etc/orchestrator.conf.jsonorchestrator-test3:container_name: orchestrator-test3image: openarkcode/orchestrator:latestrestart: alwaysports:- "3003:3000"networks:mysql-network:ipv4_address: 172.22.0.93volumes:- ./orchestrator3.conf.json:/etc/orchestrator.conf.json# orc 使用的数据库orc-mysql:container_name: orc-mysqlimage: mysql:5.7.30restart: alwaysenvironment:MYSQL_ROOT_PASSWORD: test123456MYSQL_PASSWORD: orc123456MYSQL_USER: orc1MYSQL_DATABASE: orcdbports:- "3306:3306"networks:mysql-network:ipv4_address: 172.22.0.102volumes:- ./mysql:/var/lib/mysqlmysql-master:container_name: mysql-masterhostname: mysql-masterimage: mysql:5.7.30restart: alwaysenvironment:MYSQL_ROOT_PASSWORD: test123456ports:- "3307:3306"networks:mysql-network:ipv4_address: 172.22.0.103volumes:- ./mysql1/conf/my.cnf:/etc/my.cnf- ./mysql1/data:/var/lib/mysqlmysql-slave:container_name: mysql-slavehostname: mysql-slaveimage: mysql:5.7.30restart: alwaysenvironment:MYSQL_ROOT_PASSWORD: test123456ports:- "3308:3306"networks:mysql-network:ipv4_address: 172.22.0.104volumes:- ./mysql2/conf/my.cnf:/etc/my.cnf- ./mysql2/data:/var/lib/mysqlmysql-slave2:container_name: mysql-slave2hostname: mysql-slave2image: mysql:5.7.30restart: alwaysenvironment:MYSQL_ROOT_PASSWORD: test123456ports:- "3309:3306"networks:mysql-network:ipv4_address: 172.22.0.105volumes:- ./mysql3/conf/my.cnf:/etc/my.cnf- ./mysql3/data:/var/lib/mysql
networks:mysql-network:driver: bridgeipam:config:- subnet: 172.22.0.0/16