Add nerdctl to kind

[jonyhy96]

What would you like to be added:

Add nerdctl to kind because it is very friendly to people who are familiar with docker-cli rather than ctr.

Why is this needed:

And add nerdctl to kind will make it more easy to use on testing purposes.

[jonyhy96]

/cc @aojea
If this is accepted, i would like to help with it.

[aojea]

per the comment

Supporting containerd via nerdctl (https://github.com/containerd/nerdctl) would be quite straight forward. Almost just alias docker=nerdctl.

doesn't seem KIND needs to add anything

[jonyhy96]

per the comment

Supporting containerd via nerdctl (https://github.com/containerd/nerdctl) would be quite straight forward. Almost just alias docker=nerdctl.

doesn't seem KIND needs to add anything

Yes, it is actualy saying use nerdctl instead docker-cli to create kind container when backend by containerd. My bad.

BTW, what do u think about add nerdctl inside kind's image (/usr/local/bin) for use?

[BenTheElder]

this is perhaps a bit clearer, but essentially a dupe of #2317?

[BenTheElder]

BTW, what do u think about add nerdctl inside kind's image (/usr/local/bin) for use?

We already provide ctr (which we currently use internally) and crictl (which is a standard tool portable across kubernetes clusters), which add a fair bit to the image size. As big as the images are we do everything we can to keep them lighter.

User workloads really shouldn't be talking to the node runtime directly. You should use the Kubernetes APIs .. 🤔

[jonyhy96]

BTW, what do u think about add nerdctl inside kind's image (/usr/local/bin) for use?

We already provide ctr (which we currently use internally) and crictl (which is a standard tool portable across kubernetes clusters), which add a fair bit to the image size. As big as the images are we do everything we can to keep them lighter.

User workloads really shouldn't be talking to the node runtime directly. You should use the Kubernetes APIs .. 🤔

Thanks for reply! I was trying to lean how node runtime works in KIND and i found that nerdctl is more easy to use(for me). So I guess someone should have the same needs as me. It is ok if we don't add it to the base image for keep it lighter.Just a suggestion 😄

[BenTheElder]

I think probably we should be considering adding support for nerdctl/lima (especially if someone wants to outline the approach and take it on themselves), but currently even the podman support is a bit lacking (see e.g. #2038).

Within the nodes I think we should not add this additional tool, preferring the Kubernetes API instead (and we do also provide ctr since we depend on it internally, and probably others do now).

[BenTheElder]

#3445, #3429