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docs: Document limitation regarding subpaths

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Subpaths are not supported at the moment. Document that fact.

Fixes: #1728

Signed-off-by: Christophe de Dinechin <christophe@dinechin.org>
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Christophe de Dinechin 2021-04-23 11:30:06 +02:00 committed by Christophe de Dinechin
parent fb30c58847
commit 7d5a4252b6
1 changed files with 14 additions and 1 deletions
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docs/Limitations.md
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@ -19,6 +19,8 @@
* [Support for joining an existing VM network](#support-for-joining-an-existing-vm-network) * [Support for joining an existing VM network](#support-for-joining-an-existing-vm-network)
* [docker --net=host](#docker---nethost) * [docker --net=host](#docker---nethost)
* [docker run --link](#docker-run---link) * [docker run --link](#docker-run---link)
* [Storage limitations](#storage-limitations)
* [Kubernetes `volumeMounts.subPaths`](#kubernetes-volumemountssubpaths)
* [Host resource sharing](#host-resource-sharing) * [Host resource sharing](#host-resource-sharing)
* [docker run --privileged](#docker-run---privileged) * [docker run --privileged](#docker-run---privileged)
* [Miscellaneous](#miscellaneous) * [Miscellaneous](#miscellaneous)
@ -216,6 +218,17 @@ Equivalent functionality can be achieved with the newer docker networking comman
See more documentation at See more documentation at
[docs.docker.com](https://docs.docker.com/engine/userguide/networking/default_network/dockerlinks/). [docs.docker.com](https://docs.docker.com/engine/userguide/networking/default_network/dockerlinks/).
## Storage limitations
### Kubernetes `volumeMounts.subPaths`
Kubernetes `volumeMount.subPath` is not supported by Kata Containers at the
moment.
See [this issue](https://github.com/kata-containers/runtime/issues/2812) for more details.
[Another issue](https://github.com/kata-containers/kata-containers/issues/1728) focuses on the case of `emptyDir`.
## Host resource sharing ## Host resource sharing
### docker run --privileged ### docker run --privileged
@ -224,7 +237,7 @@ Privileged support in Kata is essentially different from `runc` containers.
Kata does support `docker run --privileged` command, but in this case full access Kata does support `docker run --privileged` command, but in this case full access
to the guest VM is provided in addition to some host access. to the guest VM is provided in addition to some host access.
The container runs with elevated capabilities within the guest and is granted The container runs with elevated capabilities within the guest and is granted
access to guest devices instead of the host devices. access to guest devices instead of the host devices.
This is also true with using `securityContext privileged=true` with Kubernetes. This is also true with using `securityContext privileged=true` with Kubernetes.