Install cgconfig in Ubuntu 16.04
I want to create some control groups using cgroup.
So far I have done the following:
-
I installed some packages:
sudo apt-get install cgroup-bin cgroup-lite cgroup-tools cgroupfs-mount libcgroup1 -
Then I created the
/etc/cgconfig.conffile with the following content:mount { cpuset = /cgroup/cpuset; cpu = /cgroup/cpu; cpuacct = /cgroup/cpuacct; memory = /cgroup/memory; devices = /cgroup/devices; freezer = /cgroup/freezer; net_cls = /cgroup/net_cls; ns = /cgroup/ns; blkio = /cgroup/blkio; } group limitcpu{ cpu { cpu.shares = 400; } } group limitmem{ memory { memory.limit_in_bytes = 512m; } } group limitio{ blkio { blkio.throttle.read_bps_device = "252:0 2097152"; } } group browsers{ cpu { cpu.shares = 200; } memory { memory.limit_in_bytes = 128m; } }according to the guide here, assuming, that the config file resides at the same location and uses the same syntax on Ubuntu, as it uses on CentOS.
-
Then according to that guide I need to start the
cgconfig service. I tried with:sudo service cgconfig restartBut, oh no! A file is missing!:
Failed to restart cgconfig.service: Unit cgconfig.service not found. -
After some wondering and searching around, I tried:
● cgconfig.service Loaded: not-found (Reason: No such file or directory) Active: inactive (dead)
So it seems I am simply not having any cgconfig service on my system!
I searched for it using:
sudo aptitude search cgconfig
However, no cgconfig is to be found.
How can I install cgconfig on my Ubuntu 16.04?
OK, I managed myself to do the same you did, but with some changes:
1) I installed the same utilities:
sudo apt-get install cgroup-bin cgroup-lite cgroup-tools cgroupfs-mount libcgroup1
2) I edited conf files like this:
/etc/init/cgroup-lite.conf
description "mount available cgroup filesystems"
author "Serge Hallyn <[email protected]>"
start on mounted MOUNTPOINT=/sys/fs/cgroup
pre-start script
test -x /bin/cgroups-mount || { stop; exit 0; }
test -d /sys/fs/cgroup || { stop; exit 0; }
/bin/cgroups-mount
cgconfigparser -l /etc/cgconfig.conf
end script
post-stop script
if [ -x /bin/cgroups-umount ]
then
/bin/cgroups-umount
fi
end script
/etc/cgconfig.conf
# Since systemd is working well, this section may not be necessary.
# Uncomment if you need it
#
# mount {
# cpuacct = /cgroup/cpuacct;
# memory = /cgroup/memory;
# devices = /cgroup/devices;
# freezer = /cgroup/freezer;
# net_cls = /cgroup/net_cls;
# blkio = /cgroup/blkio;
# cpuset = /cgroup/cpuset;
# cpu = /cgroup/cpu;
# }
group limitcpu{
cpu {
cpu.shares = 400;
}
}
group limitmem{
memory {
memory.limit_in_bytes = 512m;
}
}
group limitio{
blkio {
blkio.throttle.read_bps_device = "252:0 2097152";
}
}
group browsers {
cpu {
# Set the relative share of CPU resources equal to 25%
cpu.shares = "256";
}
memory {
# Allocate at most 512M of memory to tasks
memory.limit_in_bytes = "512m";
# Apply a soft limit of 512 MB to tasks
memory.soft_limit_in_bytes = "384m";
}
}
group media-players {
cpu {
# Set the relative share of CPU resources equal to 25%
cpu.shares = "256";
}
memory {
# Allocate at most 256M of memory to tasks
memory.limit_in_bytes = "256m";
# Apply a soft limit of 196 MB to tasks
memory.soft_limit_in_bytes = "128m";
}
}
cgconfigparser -l /etc/cgconfig.conf
And /etc/cgrules.conf
user:process subsystems group
[user]:/usr/lib/chromium-browser/chromium-browser cpu,memory browsers
[user]:/usr/bin/clementine cpu,memory media-players
That is an example, use your username instead of [user]. You can add the applications you need to limit and define whether you want them to be CPU-, memory- or both limited.
I edited the GRUB_CMDLINE_LINUX_DEFAULT line in /etc/default/grub:
GRUB_CMDLINE_LINUX_DEFAULT="cgroup_enable=memory swapaccount=1"
Updating it:
sudo update-grub
3) And finally rebooting to apply changes.
And that is how I've got this working. Before this I was having frequent OOMs with multitasking - with chromium-browser, clementine, sublime-text and other applications using a lot of resources -, now they are running smoothly and I can multitask better.
I really hope this may help others.
Currently using Ubuntu 16.04 LTS with Intel Dual Core 2.6 Ghz and 4 Gb. RAM.
I faced the same issue. It looks like there is no built-in service in current Ubuntu distributions to load cgroup config files.
You will find some (broken?) example init scripts at /usr/share/doc/cgroup-tools/examples/cgconfig and /usr/share/doc/cgroup-tools/examples/cgred.
To manually load the config files you can use
# Loads /etc/cgconfig.conf
cgconfigparser -l /etc/cgconfig.conf
# Loads /etc/cgrules.conf
cgrulesengd -vvv --logfile=/var/log/cgrulesengd.log
As a poor man's solution I wrote myself an init script that loads both files on system startup.
#!/bin/sh
### BEGIN INIT INFO
# Provides: cgconf
# Required-Start: $remote_fs $syslog
# Required-Stop: $remote_fs $syslog
# Should-Start:
# Should-Stop:
# Default-Start: 2 3 4 5
# Default-Stop: 0 1 6
# Short-Description: Configures CGroups
### END INIT INFO
start_service() {
if is_running; then
echo "cgrulesengd is running already!"
return 1
else
echo "Processing /etc/cgconfig.conf..."
cgconfigparser -l /etc/cgconfig.conf
echo "Processing /etc/cgrules.conf..."
cgrulesengd -vvv --logfile=/var/log/cgrulesengd.log
return 0
fi
}
stop_service() {
if is_running; then
echo "Stopping cgrulesengd..."
pkill cgrulesengd
else
echo "cgrulesengd is not running!"
return 1
fi
}
status() {
if pgrep cgrulesengd > /dev/null; then
echo "cgrulesengd is running"
return 0
else
echo "cgrulesengd is not running!"
return 3
fi
}
is_running() {
status >/dev/null 2>&1
}
case "${1:-}" in
start)
start_service
;;
stop)
stop_service
;;
status)
status
;;
*)
echo "Usage: /etc/init.d/cgconf {start|stop|restart|status}"
exit 2
;;
esac
exit $?
Save this file at /etc/init.d/cgconf and install it using
# make the script executable
chmod 755 /etc/init.d/cgconf
# register the service
update-rc.d cgconf defaults
# start the service
service cgconf start
# check the status
service cgconf status