的配置.....11 3.5.7 Master 和 backup 的 realserver 的配置.....15 3.5.8 Master 和 backup 的启动.....16 4 Heartbeat 高可用 Mysql 主主同步方案.....16 4.1 方案简介.....16 4.2 方案优缺点.....16 4.3 方案架构图.....17 4.4 适用场景.....17 的主主同步配置.....17 4.5.4 Heardbeat 的安装.....17 4.5.5 Heartbeat 的配置.....18 4.5.6 Heartbeat 的启动.....19 4.5.7 方案测试.....19 4.5.8 监控方案.....19 5 Heartbeat+DRBD+mysql 高可用方案.....20 5.1 方案简介.....20 5.4 DRBD 的管理维护.....21 5.5.5 Heartbeat 的安装.....23 5.5.6 Heartbeat 的配置.....23 5.5.7 Heartbeat 的管理.....25 5.5.8 Heartbeat+DRBD 测试.....25 5.5.9 Heartbeat+DRBD 监控.....25 6 MMM 高可用 mysql

|discover yHeartbeats (+)|Map<String, Databases eDiscoveryHeartbeatConfiguration>|Detect heartbeat configuration| |dis coveryTypes (+)|Map<String, Shar dingSphereAlgorithmConfiguration>|Database ds\_1|.| |disc overyHear tbeat-Name (+)|String|Detect heartbeat name|.| |discover yTypeName (+)|String|Database discovery type name|.| ## Detect Heartbeat Configuration Class name: org.apache.shardingsphere |Name|Dat aType|Description|D def au lt Va lu e| |---|---|---|---| |props (+)|Prop erties|Detect heartbeat attribute configuration, keep-alive-cron configuration, cron expression. Such as: '0/5\*\*\*\*

configuration| |discover yHeartbeats (+)|Map<String, Database DiscoveryBeatConfiguration>|Detect heartbeat configuration| |dis coveryTypes (+)|Map<String, Shard ingSphereAlgorithmConfiguration>|Database ds\_1|.| |disc overyHear tbeat-Name (+)|String|Detect heartbeat name|.| |discover yTypeName (+)|String|Database discovery type name|.| ## Detect Heartbeat Configuration Class name: org.apache.shardingsphere : |Name|Data Type|Description|Default Value| |---|---|---|---| |props (+)|Properrties|Detect heartbeat attribute configuration, keep-alive-cron configuration, cron expression. Such as: '0/5\*\*\*\*

discoveryHeartbeatName: # 检测心跳名称 discoveryTypeName: # 数据库发现类型名称 - 心跳检测配置 discoveryHeartbeat: heartbeat-name> (+)：# 心跳名称 props: keep-alive-cron: # cron 表达式，如：'0/5 * * * * ?' - 数据库发现类型配置 discoveryTypes: discoveryTypes: (+)：# 数据库发现类型名称heartbeat-name> type: # 数据库发现类型，如：MySQL.MGR props (?) : group-name: autoAwareDataSourceName: readwrite_ds - !DB_DISCOVERY dataSources: 批量读数据 来源: mgr-heartbeat Source Name: mgr-heartbeat discovery Type Name: mgr discovery Heartbeats: Prop: keep-alive-cron:

method)|handler\_types (socketio.handler.SocketIOHandler attribute)| |---|---| |handle\_bad\_request()|heartbeat()\_(socketio.virtsocket.Socket method)| |(socketio.handler.SocketIOHandler method)|handle\_disconnect\_request() self.server.get_socket() data = "%s:%s:%s:%s" % (socket.sessid, self.config['heartbeat_timeout'] or "", self.config['close_timeout'] or "", join(self.transports)) socket.connection_established = True socket.state = socket.STATE_CONNECTED socket._spawn_heartbeat() socket._spawn_watcher() try: # We'll run the WSGI app if it wasn't already done

# Detect heartbeat name discoveryTypeName: # Database discovery type name # Heartbeat Configuration discoveryHeartbeat: heartbeat-name> (+): (+): # heartbeat name props: keep-alive-cron: # This is cron expression, such as: '0/5 * * * * ?' # Database Discovery Configuration discoveryTypes: (+): # Database discovery serverTimezone=UTC&useSSL=false username: root password:heartbeat-name> connectionTimeoutMilliseconds: 3000 idleTimeoutMilliseconds: 60000 maxLifetimeMilliseconds:

discoveryHeartbeatName: # Detect heartbeat name discoveryTypeName: # Database discovery type name # Heartbeat Configuration discoveryHeartbeat: heartbeat-name> (+): # heartbeat name props: discoveryTypes: (+): # Database discovery type nameheartbeat-name> type: # Database discovery type, such as: MySQL name list - ds_0 - ds_1 - ds_2 discoveryHeartbeatName: # Detect heartbeat name discoveryTypeName: # Database discovery type name : dataSourceNames:

Cancel||✓| |H|Heartbeat||| ## Reading DataConn enum class message_type { unknown, request, cancel, acknowledge_request, reject_request, intermediate_chunk, final_chunk, error, acknowledge_cancel, heartbeat } templateheartbeat_reason { wait, write }; struct async_heartbeat_statistics { std::size_t bytes_transferred; std::size_t messages; std::size_t waits; async_heartbeat_reason reason; void(std::error_code, async_heartbeat_statistics); template decltype(auto) async_heartbeat(AsyncWriteStream&

o connect_timeout Timeout in seconds (int/float) for establishing a new connection. heartbeat Current heartbeat value (set by client). ○ hostname Node name of the remote broker. ○ insist No longer task-failed task-rejected task-revoked task-retried Worker Events worker-online worker-heartbeat worker-offline ## I ntroduction There are several tools available to monitor and inspect Celery ## Note The wakeup argument to capture sends a signal to all workers to force them to send a heartbeat. This way you can immediately see workers when the monitor starts. You can listen to specific events

o connect_timeout Timeout in seconds (int/float) for establishing a new connection. heartbeat Current heartbeat value (set by client). ○ hostname Node name of the remote broker. ○ insist No longer task-failed task-rejected task-revoked task-retried Worker Events worker-online worker-heartbeat worker-offline ## I ntroduction There are several tools available to monitor and inspect Celery ## Note The wakeup argument to capture sends a signal to all workers to force them to send a heartbeat. This way you can immediately see workers when the monitor starts. You can listen to specific events