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design: update host-cgroups documentation according to the new changes

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update host-cgroups documentation according to the new changes in the runtime

fixes #588

Signed-off-by: Julio Montes <julio.montes@intel.com>
This commit is contained in:
Julio Montes
2020-01-24 15:09:55 +00:00
parent a51efa9ada
commit 1fa12cf5a2
1 changed files with 6 additions and 6 deletions
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12
design/host-cgroups.md
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@@ -67,7 +67,7 @@ into account. This will be feasible in the 1.16 Kubernetes release through the `
| | | | kata-shimv2, VMM and threads: | | | |
| | | | (VMM, IO-threads, vCPU threads, etc)| | | |
| | | | | | | |
| | | | kata-sandbox-<id> | | | |
| | | | kata_<sandbox-id> | | | |
| | | +--------------------------------------+ | | |
| | | | | |
| | |Pod 1 | | |
@@ -78,8 +78,8 @@ into account. This will be feasible in the 1.16 Kubernetes release through the `
| | | | kata-shimv2, VMM and threads: | | | |
| | | | (VMM, IO-threads, vCPU threads, etc)| | | |
| | | | | | | |
| | | | kata-sandbox-<id> | | | |
| | | +--------------------------------------+ | | |
| | | | kata_<sandbox-id> | | | |
| | | +--------------------------------------+ | | |
| | |Pod 2 | | |
| | +---------------------------------------------+ | |
| |kubepods | |
@@ -94,7 +94,7 @@ into account. This will be feasible in the 1.16 Kubernetes release through the `
```
podCgroup=Parent(container.CgroupsPath)
KataSandboxCgroup=<podCgroup>/kata-sandbox-<PodSandboxID>
KataSandboxCgroup=<podCgroup>/kata_<PodSandboxID>
```
2. Create the cgroup, `KataSandboxCgroup`
@@ -102,8 +102,8 @@ into account. This will be feasible in the 1.16 Kubernetes release through the `
3. Join the `KataSandboxCgroup`
Any process created by the runtime will be created in `KataSandboxCgroup`.
The runtime will not limit the cgroup in the host, but the caller is free
to set the proper limits for the `podCgroup`.
The runtime will limit the cgroup in the host only if the sandbox doesn't have a
container type annotation, but the caller is free to set the proper limits for the `podCgroup`.
In the example above the pod cgroups are `/kubepods/pod1` and `/kubepods/pod2`.
Kata creates the unrestricted sandbox cgroup under the pod cgroup.