Overlay size, as alternative to --storage-opt size=30G

[lukasmrtvy]

Description

Would be superb to support limiting disk space similar to the Docker's --storage-opt size=30G
Thanks

Is this feature related to a specific bug?

No response

Do you have a specific solution in mind?

No response

[manojks1999]

/assign

[ayushr2]

IIUC Docker's --storage-opt should be working correctly with gVisor too. Are you experiencing a bug with that? Or is this a feature request to "limit disk space" akin to that option?

Limiting disk space depends on the underlying filesystem driver. I think higher-level container runtimes like Docker are the right places to implement this feature.

You can easily limit disk space on tmpfs BTW using the size mount option; see mount(5). gVisor supports this mount option.

[lukasmrtvy]

@ayushr2 Hi, thanks. The use case would be with Docker + containerd ( https://docs.docker.com/desktop/features/containerd/ ). I have tried a storage-opt size= arg, but it's not working. Maybe this has to be supported directly in containerd snapshotter?

[ayushr2]

I have tried a storage-opt size= arg, but it's not working.

Is it only not working with gVisor? Or is this not working without gVisor as well?

Maybe this has to be supported directly in containerd snapshotter?

I believe so... the component configuring the host container filesystem has to set disk limits using filesystem driver specific primitives.