Allow mounting host host directories to kind nodes

[mitar]

It seems there is no way to request some host volumes to be mounted inside the kind container. So then pods cannot access those host volumes through hostPath. This is useful for us to bring testing data in.

[BenTheElder]

definitely, this relates to #28, mostly we need to think about how best to expose this. cc @munnerz

[mitar]

Is there any workaround for now? Any way to hook into argument list being passed when creating a control plane container?

[BenTheElder]

There is not, that sort of thing would create some interesting stability guarantees, eg at some point I think we may want to move to a docker client library instead of execing docker at which point any option to hook it with arbitrary args would no longer work.

I'd like to avoid breaking changes going forward as much as possible, so I'd like to think about how exactly we expose options like this. I think we can provide config for host path mounts specifically, and think a bit about how that relates to multi-node (which is forthcoming...)

The closest work around right now is patching kind itself...

[BenTheElder]

/priority backlog
I definitely intend to support this

[BenTheElder]

/assign
/lifecycle active
I'll file a PR after #77, also going to clean up the node lifecycle stuff a bit along with it.

[BenTheElder]

we'll want to consider customizations like this when we add topology / multi-node @fabriziopandini

I've hesitated back off on PRing this because while the change is fairly simple, the config should be forward thinking with respect to multi-node. 🤔

[fabriziopandini]

+1 noted