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Merge pull request #654 from amshinde/add-containerd-annotation-config

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annotations: Add config documentation for containerd
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Salvador Fuentes 2020-04-23 10:46:04 -05:00 committed by GitHub
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how-to/how-to-set-sandbox-config-kata.md
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@ -76,6 +76,33 @@ There are several kinds of Kata configurations and they are listed below.
| `io.katacontainers.config.hypervisor.virtio_fs_daemon` | string | virtio-fs `vhost-user` daemon path |
| `io.katacontainers.config.hypervisor.virtio_fs_extra_args` | string | extra options passed to `virtiofs` daemon |
# CRI Configuration
In case of CRI-O, all annotations specified in the pod spec are passed down to Kata.
For containerd, annotations specified in the pod spec are passed down to Kata
starting with version `1.3.0`. Additionally, extra configuration is needed for containerd,
by providing a `pod_annotations` field in the containerd config file. The `pod_annotations`
field is a list of annotations that can be passed down to Kata as OCI annotations.
It supports golang match patterns. Since annotations supported by Kata follow the pattern
`io.katacontainers.*`, the following configuration would work for passing annotations to
Kata from containerd:
```
$ cat /etc/containerd/config
....
[plugins.cri.containerd.runtimes.kata]
runtime_type = "io.containerd.runc.v1"
pod_annotations = ["io.katacontainers.*"]
[plugins.cri.containerd.runtimes.kata.options]
BinaryName = "/usr/bin/kata-runtime"
....
```
Additional documentation on the above configuration can be found in the
[containerd docs](https://github.com/containerd/cri/blob/8d5a8355d07783ba2f8f451209f6bdcc7c412346/docs/config.md).
# Example - Using annotations
As mentioned above, not all containers need the same modules, therefore using