gs_ssh

Background

gs_ssh, provided by MogDB, helps users run the same command on multiple nodes in MogDB.

Precautions

• gs_ssh can only run the command which the OS user omm has permission
• The command to be run will not affect the current session where gs_ssh is executed. For example, the command such as cd or source will not affect the current session as it will only be run in the environment within the process of gs_ssh itself

Prerequisites

• The trust relationship among the hosts is normal.
• MogDB has been correctly installed and deployed.
• The command to be run can be found by the which command, and the current user has the required execution permission.
• Log in to the OS as the OS user omm to run the gs_ssh command.

Syntax

• Run commands synchronously.

  gs_ssh -c cmd

• Display help information.

  gs_ssh -? | --help

• Display version information.

  gs_ssh -V | --version

Parameter Description

• -c

  Specifies the command name of Linux shell on the hosts of MogDB.

• -?, -help

  Displays help information.

• -V, -version

  Displays version information.

Example

Run the same command on each host of MogDB. Take the hostname command as an example.

gs_ssh -c "hostname"
Successfully execute command on all nodes.
Output:
[SUCCESS] plat1:
plat1
[SUCCESS] plat2:
plat2
[SUCCESS] plat3:
plat3
[SUCCESS] plat4:
plat4