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Add emptyDir volume support to kube play

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When a kube yaml has a volume set as empty dir, podman
will create an anonymous volume with the empty dir name and
attach it to the containers running in the pod. When the pod
is removed, the empy dir volume created is also removed.

Add tests and docs for this as well.

Signed-off-by: Urvashi Mohnani <umohnani@redhat.com>
This commit is contained in:
Urvashi Mohnani
2022-07-24 19:44:41 -04:00
parent 57441b4c71
commit 98169c20dd
11 changed files with 98 additions and 15 deletions
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2
docs/source/markdown/podman-kube-play.1.md.in
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@ -21,7 +21,7 @@ Currently, the supported Kubernetes kinds are:
`Kubernetes Pods or Deployments`
Only two volume types are supported by kube play, the *hostPath* and *persistentVolumeClaim* volume types. For the *hostPath* volume type, only the *default (empty)*, *DirectoryOrCreate*, *Directory*, *FileOrCreate*, *File*, *Socket*, *CharDevice* and *BlockDevice* subtypes are supported. Podman interprets the value of *hostPath* *path* as a file path when it contains at least one forward slash, otherwise Podman treats the value as the name of a named volume. When using a *persistentVolumeClaim*, the value for *claimName* is the name for the Podman named volume.
Only three volume types are supported by kube play, the *hostPath*, *emptyDir*, and *persistentVolumeClaim* volume types. For the *hostPath* volume type, only the *default (empty)*, *DirectoryOrCreate*, *Directory*, *FileOrCreate*, *File*, *Socket*, *CharDevice* and *BlockDevice* subtypes are supported. Podman interprets the value of *hostPath* *path* as a file path when it contains at least one forward slash, otherwise Podman treats the value as the name of a named volume. When using a *persistentVolumeClaim*, the value for *claimName* is the name for the Podman named volume. When using an *emptyDir* volume, podman creates an anonymous volume that is attached the containers running inside the pod and is deleted once the pod is removed.
Note: When playing a kube YAML with init containers, the init container will be created with init type value `once`. To change the default type, use the `io.podman.annotations.init.container.type` annotation to set the type to `always`.