Modify control groups for a single node¶

If you want to change the control group settings on a single node, you must edit the control groups configuration file /etc/cgconfig.conf, as well as create, if needed, and configure the /etc/cgrules.conf file. You can modify control groups before or after you deploy an OpenStack environment.

To modify control groups for a single node:

1. Log in to the CLI of corresponding node.

2. Open the /etc/cgconfig.conf file for editing.

3. Apply the required changes.

4. Save and exit.

5. Add the corresponding parameters to the /etc/cgrules.conf file.

   Example:

   * :keystone-api   cpu   keystone-api
   * :mysqld   cpu   mysqld
   

6. Restart cgconfigparser:

   service cgconfigparser restart
   

7. For each running process, type:

   cgclassify 'pidof -x <name_of_process>'
   

8. Restart cgrulesengd:

   service cgrulesengd restart