AliKhadivi/$Cgroupfs.md

## $Cgroupfs.md

      
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              $Cgroupfs.md
            
          
    Install and config cgroup with cgroupfs in Ubuntu

Install

Install required packages
apt update && apt install cgroup-tools cgroup-lite libcgroup1  cgroupfs-mount

Configure

copy cgred.conf from examples
cp /usr/share/doc/cgroup-tools/examples/cgred.conf /etc/

/etc/cgconfig.conf
group web2 {
     cpu {
         cpu.cfs_quota_us=10000;
     }
     memory {
         memory.limit_in_bytes = 1024m;
     }
}

cpu.cfs_quota_us = 10000 equals to 10% cpu usage
memory.limit_in_bytes = 1024 equals to 1G of system memory
/etc/cgrules.conf
#<user>    <controllers>           <destination>
web2       cpu,memory              web2

This will limit every process of the user web2 to 10% CPU and 1G of memory.
For testing use this commands:
/usr/sbin/cgconfigparser -l /etc/cgconfig.conf
/usr/sbin/cgrulesengd -vvv

check if cgroup’s are working properly
cat /sys/fs/cgroup/cpu/web2/tasks
cat /sys/fs/cgroup/memory/web2/tasks

Create Service

Here my systemd service files, install them the usual systemd way
‍‍cgconfigparser.service
[Unit]
Description=cgroup config parser
After=network.target
[Service]
User=root
Group=root
ExecStart=/usr/sbin/cgconfigparser -l /etc/cgconfig.conf
Type=oneshot
[Install]
WantedBy=multi-user.target

cgrulesgend.service
[Unit]
Description=cgroup rules generator
After=network.target cgconfigparser.service
[Service]
User=root
Group=root
Type=forking
EnvironmentFile=-/etc/cgred.conf
ExecStart=/usr/sbin/cgrulesengd
Restart=on-failure
[Install]
WantedBy=multi-user.target

reload systemd and start services
systemctl daemon-reload
systemctl enable cgconfigparser
systemctl enable cgrulesgend
systemctl start cgconfigparser
systemctl start cgrulesgend

Have fun!
Source: paranoids.at

  
## cgconfig.conf
group web2 {
     cpu {
         cpu.cfs_quota_us=10000;
     }
     memory {
         memory.limit_in_bytes = 1024m;
     }
}

## cgrules.conf
#<user>    <controllers>           <destination>
web2       cpu,memory              web2

## cgrulesgend.service
[Unit]
Description=cgroup rules generator
After=network.target cgconfigparser.service
[Service]
User=root
Group=root
Type=forking
EnvironmentFile=-/etc/cgred.conf
ExecStart=/usr/sbin/cgrulesengd
Restart=on-failure
[Install]
WantedBy=multi-user.target

## ‍‍cgconfigparser.service
[Unit]
Description=cgroup config parser
After=network.target
[Service]
User=root
Group=root
ExecStart=/usr/sbin/cgconfigparser -l /etc/cgconfig.conf
Type=oneshot
[Install]
WantedBy=multi-user.target
	group web2 {
	cpu {
	cpu.cfs_quota_us=10000;
	}
	memory {
	memory.limit_in_bytes = 1024m;
	}
	}
	[Unit]
	Description=cgroup rules generator
	After=network.target cgconfigparser.service
	[Service]
	User=root
	Group=root
	Type=forking
	EnvironmentFile=-/etc/cgred.conf
	ExecStart=/usr/sbin/cgrulesengd
	Restart=on-failure
	[Install]
	WantedBy=multi-user.target
	[Unit]
	Description=cgroup config parser
	After=network.target
	[Service]
	User=root
	Group=root
	ExecStart=/usr/sbin/cgconfigparser -l /etc/cgconfig.conf
	Type=oneshot
	[Install]
	WantedBy=multi-user.target