Difference between revisions of "Cgroups"
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↑ https://kernelnewbies.org/Linux_5.4#More_accurate_cgroup_I.2FO_control_with_blk-iocost
↑ https://www.freedesktop.org/software/systemd/man/systemd-cgtop.html
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| + | ==Packages== | ||
| + | cgroups functionality that was released in [[Linux Kernel]] version [[2.6.24]] | ||
| + | Packages: | ||
| + | * <code>[[cgroup-lite]]</code>: <code>[[cgroups-mount]], [[cgroups-umount]]</code> | ||
| + | * <code>[[cgroup-tools]]</code>: <code>[[cgcreate]]</code>, <code>[[cgexec]]</code>, <code>[[lscgroup]]</code> among others | ||
| + | * <code>[[cgroupfs-mount]]</code> | ||
| + | |||
| + | |||
| + | |||
| + | [[systemd-cgls]] | ||
| + | [[systemd-cgls]] memory | ||
| + | [[systemd-cgtop]] | ||
| + | |||
| + | ==Basic Commands== | ||
| + | *Create a group : <code>[[cgcreate]] -g memory:myGroup</code> | ||
| + | *<code>[[cgexec]] -g memory:myGroup YOUR_PROGRAM_TO_EXEC</code> | ||
| + | |||
| + | |||
| + | * You can use <code>[[cgget]]</code> to view the current limits, usage, & high watermarks of the group: | ||
| + | sudo [[cgget]] -g memory:/myGroup|grep bytes | ||
| + | memory.kmem.tcp.usage_in_bytes: 0 | ||
| + | memory.soft_limit_in_bytes: 9223372036854771712 | ||
| + | memory.kmem.tcp.max_usage_in_bytes: 0 | ||
| + | memory.max_usage_in_bytes: 0 | ||
| + | memory.limit_in_bytes: 9223372036854771712 | ||
| + | memory.kmem.max_usage_in_bytes: 0 | ||
| + | memory.usage_in_bytes: 0 | ||
| + | memory.kmem.limit_in_bytes: 9223372036854771712 | ||
| + | memory.kmem.usage_in_bytes: 0 | ||
| + | memory.kmem.tcp.limit_in_bytes: 9223372036854771712 | ||
| + | |||
| + | [[I/O]] control, more accurate cgroup I/O control with <code>blk-iocost</code><ref>https://kernelnewbies.org/Linux_5.4#More_accurate_cgroup_I.2FO_control_with_blk-iocost</ref> | ||
| + | |||
| + | == Related terms == | ||
| + | * <code>[[ulimit]]</code> | ||
| + | * [[Cgroups: cgroup mountpoint does not exist: unknown]] | ||
| + | * [[Cgroups v2]] | ||
| + | Sep 21 11:23:14 yourhostame dockerd[1850]: time="2023-09-21T11:23:14.096834108Z" level=warning msg="Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without [[swap]]." | ||
| + | |||
| + | == Activities == | ||
| + | * Read https://wiki.archlinux.org/index.php/cgroups | ||
| + | * How to limit to CPU and Memory : [[cgcreate]] | ||
== See also == | == See also == | ||
* <code>[[systemd-cgtop]]</code><ref>https://www.freedesktop.org/software/systemd/man/systemd-cgtop.html</ref>, <code>[[docker stats]]</code> | * <code>[[systemd-cgtop]]</code><ref>https://www.freedesktop.org/software/systemd/man/systemd-cgtop.html</ref>, <code>[[docker stats]]</code> | ||
* <code>[[netdata]]</code> cgroups plugin | * <code>[[netdata]]</code> cgroups plugin | ||
| − | * | + | * {{containers}} |
| − | * {{ | + | * {{cgroups}} |
[[Category:Linux]] | [[Category:Linux]] | ||
Latest revision as of 11:31, 21 September 2023
This article is a Draft. Help us to complete it.
Packages[edit]
cgroups functionality that was released in Linux Kernel version 2.6.24
Packages:
cgroup-lite:cgroups-mount, cgroups-umountcgroup-tools:cgcreate,cgexec,lscgroupamong otherscgroupfs-mount
systemd-cgls systemd-cgls memory systemd-cgtop
Basic Commands[edit]
- You can use
cggetto view the current limits, usage, & high watermarks of the group:
sudo cgget -g memory:/myGroup|grep bytes memory.kmem.tcp.usage_in_bytes: 0 memory.soft_limit_in_bytes: 9223372036854771712 memory.kmem.tcp.max_usage_in_bytes: 0 memory.max_usage_in_bytes: 0 memory.limit_in_bytes: 9223372036854771712 memory.kmem.max_usage_in_bytes: 0 memory.usage_in_bytes: 0 memory.kmem.limit_in_bytes: 9223372036854771712 memory.kmem.usage_in_bytes: 0 memory.kmem.tcp.limit_in_bytes: 9223372036854771712
I/O control, more accurate cgroup I/O control with blk-iocost[1]
Related terms[edit]
Sep 21 11:23:14 yourhostame dockerd[1850]: time="2023-09-21T11:23:14.096834108Z" level=warning msg="Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap."
Activities[edit]
- Read https://wiki.archlinux.org/index.php/cgroups
- How to limit to CPU and Memory : cgcreate
See also[edit]
systemd-cgtop[2],docker statsnetdatacgroups plugin- Containers, OCI: Docker (
dockerd),containerd,runc, Podman, buildah, skopeo, lxd, Container Registry, Service mesh, Windows Server containers, Containerpilot, CoreOS, CAdvisor, Containers networking, Container scanning, cosign, CRI, CRI-O,initContainers, Sidecar container, Container images, latest cgroups:cgcreate, cgroups v2
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