How to migrate from libcgroup resource control setting to systemd unit setting.

Bertha 。 2022-08-28 05:52 111阅读 0赞

### **Environment** ###

SUSE Linux Enterprise Server 12 Service Pack 1 (SLES 12 SP1)  
SUSE Linux Enterprise Server 12 Service Pack 2 (SLES 12 SP2)

### **Situation** ###

Systemd overwrites *libcgroup* settings from **/etc/cgconfig.conf**.

### **Resolution** ###

The*libcgroup* resource control configuration file is in **/etc/cgconfig.conf**, however libcgroup is obsolete and it may conflict with systemd's own cgroup handling. The settings can be moved from **/etc/cgconfig.conf** to *systemd* unit configuration files.  
  
If the program that requires cgroup settings does not have a systemd unit file yet, creating a new one, for example **/etc/systemd/system/example.service**, that includes the appropriate resource control statements is necessary.  
  
For example, if the settings in **/etc/cgconfig.conf** are looking like this:

group cpu-grp \{

cpu \{

cpu.cfs\_quota\_us=40000;

cpu.cfs\_period\_us=100000;

the new or editied unit file **/etc/systemd/system/example.service**to start a program **/opt/bin/quota40-app** with quotas might look like this:

\[Unit\]

Description=Starting quota40-app with a CPU quota of 40%

\[Service\]

Type=simple

ExecStart=/opt/bin/quota40-app

CPUQuota=40%

The statement CPUQuota=40% sets the cpu quota to 40% (cfs\_quota\_us divided by cf\_period\_us multiplied by 100). The program can then be started by running systemctl start example.service.  
  
If a program already has a service file, instead of editing the existing one drop-ins can be used for additional settings such as quotas. For drop-ins, a subdirectory for the service needs to be created, for example **/etc/systemd/system/example.service.d/**, and a files with names ending on .conf, for example **10-resource-control.conf** can be created in it to set the additional directives for the service. Implementing above settings, **/etc/systemd/system/example.service.d/10-resource-control.conf** would look simply like this:  
  
\[Service\]  
CPUQuota=40%

### **Cause** ###

Resource control specification is different between *systemd* and *libcgroup*, and there can be only one of them interacting with cgroup controllers.

### **Additional Information** ###

The man page systemd.resource-control provides documentation for the various possible resource control settings in *systemd* to help transitioning from *libcgroup*.

### **Disclaimer** ###

This Support Knowledgebase provides a valuable tool for SUSE customers and parties interested in our products and solutions to acquire information, ideas and learn from one another. Materials are provided for informational, personal or non-commercial use within your organization and are presented "AS IS" WITHOUT WARRANTY OF ANY KIND.

转载至[How to migrate from libcgroup resource control setting to systemd unit setting. | Support | SUSE][How to migrate from libcgroup resource control setting to systemd unit setting. _ Support _ SUSE]

[How to migrate from libcgroup resource control setting to systemd unit setting. _ Support _ SUSE]: https://www.suse.com/zh-cn/support/kb/doc/?id=000018890