Custom drain command

[sebastiangaiser]

Hey, when doing upgrades talosctl is used to drain nodes before doing the actual upgrade.

Unfortunately talosctl is ignoring e.g. PodDisruptionBudget blocking drains: siderolabs/talos#9882
To mitigate this, an extension to the CRD like

spec:
  drain:
    image:
    command:
    args:

Would be interesting to specify own ways of draining the node before talosctl would start. This could e.g. be implemented as an optional additional init container.

What do you think about this? Thanks in advance 👋🏻

[onedr0p]

I think this would add a lot of complexity to the project but I can see the need for a normal kubernetes drain that takes into account PDBs so I will keep this open.

[sebastiangaiser]

What do you think about adding a

spec:
  initContainer: []

section and leave the rest to the user for now? This would probably be a bit more pragmatic for now.