Manage high availability components-PolarDB(PolarDB)-阿里云帮助中心

Use pdbcli cm to manage the status of the high availability (HA) component, Cluster Manager, on a target node.

The config.yaml file specifies the hosts where the HA component is installed. You can use pdbcli cm to perform operations on the HA component on a target node, such as starting, stopping, restarting, and querying its status.

To start the HA component on a target node:
```
pdbcli cm --start --targets='HOSTNAME'
```
To stop the HA component on a target node:
```
pdbcli cm --stop --targets='HOSTNAME'
```
To restart the HA component on a target node:
```
pdbcli cm --restart --targets='HOSTNAME'
```
To view the status of the HA component on a target node:
```
pdbcli cm --status --targets='HOSTNAME'
```

Note

HOSTNAME is the hostname of the target host. You can find it in the configuration file.
To specify multiple target hosts, separate the hostnames with a comma. For example: pdbcli cm --restart --targets='host01,host02'.

Run pdbcli help cm or pdbcli cm --help to view the descriptions of the HA component commands:

Using config file: ./config.yaml
Control PolarDB Cluster Manager operation.
    
    For example:

    pdbcli cm --restart --targets='host01,host02'

Usage:
 pdbcli cm [flags]

Flags:
 -h, --help       help for cm  # Get help for the cm command.
   --restart     Restart PolarDB Cluster Manager Service, this operation will
                perform rolling restart operation.
   --start      Start PolarDB Cluster Manager Service.
   --status      Show PolarDB Cluster Manager Service status.
   --stop       Stop PolarDB Cluster Manager Service.
   --targets string  Specify operation target host(s) (HOSTNAME with comma(,) separated with NO SPACE). # Specify the target host(s) for the cm command. For multiple hosts, separate the HOSTNAMEs with a comma.

Global Flags:
   --config string  Specify Config file. (default "./config.yaml") # Specify the configuration file. The default is ./config.yaml.
   --debug      Enable additional output for debugging. # Show additional output for debugging.