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cgrules.conf: libcgroup configuration file


cgrules.conf - libcgroup configuration file


cgrules.conf configuration file is used by libcgroups to define control groups to which a process belongs. The file contains a list of rules which assign to a defined group/user a control group in a subsystem (or control groups in subsystems). Rules have two formats: <user> <controllers> <destination> <user>:<process name> <controllers> <destination> Where: user can be: - a user name - a group name with @group syntax - the wildcard '*', for any user or group - '%', which is equivalent to "ditto" (useful for multi-line rules where different cgroups need to be specified for various hierarchies for a single user) process name is optional and it can be: - a process name - a full command path of a process controllers can be: - comma separated controller names (no spaces) or - * (for all mounted controllers) destination can be: - path relative to the controller hierarchy (ex. pgrp1/gid1/uid1) - following strings will get expanded %u username, uid if name resolving fails %U uid %g group name, gid if name resolving fails %G gid %p process name, pid if name not available %P pid '\' can be used to escape '%' First rule which matches the criteria will be executed. Any text starting with '#' is considered as a start of comment line and is ignored.


student devices /usergroup/students Student's processes in the 'devices' subsystem belong to the control group /usergroup/students. student:cp devices /usergroup/students/cp When student executes 'cp' command, the processes in the 'devices' subsystem belong to the control group /usergroup/students/cp. @admin * admingroup/ Processes started by anybody from admin group no matter in what subsystem belong to the control group admingroup/. peter cpu test1/ % memory test2/ The first line says Peter's task for cpu controller belongs to test1 control group. The second one says Peter's tasks for memory controller belong to test2/ control group. * * default/ All processes in any subsystem belong to the control group default/. Since the earliest matched rule is applied, it makes sense to have this line at the end of the list. It will put a task which was not mentioned in the previous rules to default/ control group.
/etc/cgrules.conf default libcgroup configuration file
cgconfig.conf (5), cgclassify (1), cgred.conf (5)



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