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使用 dmctl 运维 TiDB Data Migration 集群
了解如何使用 dmctl 运维 DM 集群。
/docs-cn/tidb-data-migration/dev/dmctl-introduction/
/docs-cn/tidb-data-migration/dev/manage-replication-tasks/

使用 dmctl 运维 TiDB Data Migration 集群

注意：

对于用 TiUP 部署的 DM 集群，推荐直接使用 tiup dmctl 命令。

dmctl 是用来运维 DM 集群的命令行工具，支持交互模式和命令模式。

dmctl 交互模式

进入交互模式，与 DM-master 进行交互：

注意：

交互模式下不具有 bash 的特性，比如不需要通过引号传递字符串参数而应当直接传递。

{{< copyable "shell-regular" >}}

./dmctl --master-addr 172.16.30.14:8261
Welcome to dmctl
Release Version: ${version}
Git Commit Hash: xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
Git Branch: release-x.x
UTC Build Time: yyyy-mm-dd hh:mm:ss
Go Version: go version gox.xx linux/amd64

» help
DM control

Usage:
  dmctl [command]

Available Commands:
  binlog          manage or show binlog operations
  binlog-schema   manage or show table schema in schema tracker
  check-task      Checks the configuration file of the task
  config          manage config operations
  decrypt         Decrypts cipher text to plain text
  encrypt         Encrypts plain text to cipher text
  help            Gets help about any command
  list-member     Lists member information
  offline-member  Offlines member which has been closed
  operate-leader  `evict`/`cancel-evict` the leader
  operate-source  `create`/`stop`/`show` upstream MySQL/MariaDB source
  pause-relay     Pauses DM-worker's relay unit
  pause-task      Pauses a specified running task or all (sub)tasks bound to a source
  purge-relay     Purges relay log files of the DM-worker according to the specified filename
  query-status    Queries task status
  resume-relay    Resumes DM-worker's relay unit
  resume-task     Resumes a specified paused task or all (sub)tasks bound to a source
  shard-ddl-lock  maintain or show shard-ddl locks information
  start-relay     Starts workers pulling relay log for a source
  start-task      Starts a task as defined in the configuration file
  stop-relay      Stops workers pulling relay log for a source
  stop-task       Stops a specified task or all (sub)tasks bound to a source
  transfer-source Transfers a upstream MySQL/MariaDB source to a free worker

Flags:
  -h, --help             help for dmctl
  -s, --source strings   MySQL Source ID.

Use "dmctl [command] --help" for more information about a command.

dmctl 命令模式

命令模式跟交互模式的区别是，执行命令时只需要在 dmctl 命令后紧接着执行任务操作，任务操作同交互模式的参数一致。

注意：

  • 一条 dmctl 命令只能跟一个任务操作
  • 从 v2.0.4 版本开始，支持从环境变量 (DM_MASTER_ADDR) 里读取 -master-addr 参数

{{< copyable "shell-regular" >}}

./dmctl --master-addr 172.16.30.14:8261 start-task task.yaml
./dmctl --master-addr 172.16.30.14:8261 stop-task task
./dmctl --master-addr 172.16.30.14:8261 query-status

export DM_MASTER_ADDR="172.16.30.14:8261"
./dmctl query-status
Available Commands:
  binlog          manage or show binlog operations
  binlog-schema   manage or show table schema in schema tracker
  check-task      Checks the configuration file of the task
  config          manage config operations
  decrypt         Decrypts cipher text to plain text
  encrypt         Encrypts plain text to cipher text
  help            Gets help about any command
  list-member     Lists member information
  offline-member  Offlines member which has been closed
  operate-leader  `evict`/`cancel-evict` the leader
  operate-source  `create`/`stop`/`show` upstream MySQL/MariaDB source
  pause-relay     Pauses DM-worker's relay unit
  pause-task      Pauses a specified running task or all (sub)tasks bound to a source
  purge-relay     Purges relay log files of the DM-worker according to the specified filename
  query-status    Queries task status
  resume-relay    Resumes DM-worker's relay unit
  resume-task     Resumes a specified paused task or all (sub)tasks bound to a source
  shard-ddl-lock  maintain or show shard-ddl locks information
  start-relay     Starts workers pulling relay log for a source
  start-task      Starts a task as defined in the configuration file
  stop-relay      Stops workers pulling relay log for a source
  stop-task       Stops a specified task or all (sub)tasks bound to a source
  transfer-source Transfers a upstream MySQL/MariaDB source to a free worker

Flags:
      --config string        Path to config file.
  -h, --help                 help for dmctl
      --master-addr string   Master API server address, this parameter is required when interacting with the dm-master
      --rpc-timeout string   RPC timeout, default is 10m. (default "10m")
  -s, --source strings       MySQL Source ID.
      --ssl-ca string        Path of file that contains list of trusted SSL CAs for connection.
      --ssl-cert string      Path of file that contains X509 certificate in PEM format for connection.
      --ssl-key string       Path of file that contains X509 key in PEM format for connection.
  -V, --version              Prints version and exit.

Use "dmctl [command] --help" for more information about a command.