[installer]: config detects shiftfs and containerd values

[mrsimonemms]

Description

This creates two new commands - config cluster shiftfs and config files containerd - designed to autodetect whether ShiftFS is supported and the location of the containerd files.

The ShiftFS command reuses the init container in ws-daemon.

The command config cluster and config files have been designed so that future commands can be written. The config cluster is designed for commands that deploy a Kubernetes resource to get the answer and the config files is designed for commands that are run against the file system, either on the cluster or against a mounted volume in a pod.

This is part of a major refactoring of the configuration so that it's simpler and just config generation. See #12319 for my notepad of how it'll look eventually.

Related Issue(s)

Fixes #12198

How to test

Run the commands. This should be run on an instance that supports ShiftFS (ie, not Azure/k3s) and one that does not. The config files containerd command will need to be run on a cluster - you may test with the following script on your test cluster (this should run without error and set the containerdRuntimeDir and containerdSocket at the bottom:

apiVersion: batch/v1
kind: Job
metadata:
  name: installer
  labels:
    app: gitpod
    component: gitpod-installer
spec:
  backoffLimit: 1
  ttlSecondsAfterFinished: 60
  template:
    metadata:
      labels:
        app: gitpod
        component: gitpod-installer
    spec:
      restartPolicy: OnFailure
      containers:
        - name: installer
          image: "eu.gcr.io/gitpod-core-dev/build/installer:sje-installer-config-detect.4"
          volumeMounts:
            - mountPath: /mnt/node0
              name: node-fs0
              readOnly: true
          env:
            - name: CONFIG_FILE
              value: /tmp/gitpod-config.yaml
            - name: NAMESPACE
              value: gitpod
          command:
            - /bin/sh
            - -c
          args:
            - |
              /app/installer config init
              /app/installer config files containerd --mount-path=/mnt/node0
              cat ${CONFIG_FILE}
      volumes:
        - name: node-fs0
          hostPath:
            path: /
            type: Directory

Release Notes

[installer]: config detects shiftfs and containerd values

Documentation

Werft options:

• /werft with-preview

[nandajavarma]

/werft run with-sh-preview

👍 started the job as gitpod-build-sje-installer-config-detect.5
(with .werft/ from main)

[nandajavarma]

/werft run with-sh-preview cluster=gke

👍 started the job as gitpod-build-sje-installer-config-detect.6
(with .werft/ from main)

[nandajavarma]

LGTM! Can't wait to see it used in KOTS installer config!
Ran self-hosted tests on k3s and GKE to make sure normal installation isn't affected.

[mrsimonemms]

Thanks @nandajavarma, much appreciated