[kots]: automatically enable shiftfs support if cluster supports it

Author: Simon Emms

install/kots/manifests/gitpod-installer-job.yaml

@@ -77,6 +77,16 @@ spec:
               echo "Gitpod: Generate the base Installer config"
               /app/installer init > "${CONFIG_FILE}"
 
+              echo "Gitpod: auto-detecting ShiftFS support on host machine"
+              kubectl wait job -n {{repl Namespace }} --for=condition=complete -l component=shiftfs-module-loader --timeout=30s || true
+              ENABLE_SHIFTFS=$(kubectl get jobs.batch -n {{repl Namespace }} -l component=shiftfs-module-loader -o jsonpath='{.items[0].status.succeeded}')
+
+              if [ "${ENABLE_SHIFTFS}" = "1" ]; then
+                echo "Gitpod: enabling ShiftFS support"
+
+                yq e -i '.workspace.runtime.fsShiftMethod = "shiftfs"' "${CONFIG_FILE}"
+              fi
+
               echo "Gitpod: auto-detecting containerd location on host machine"
               if [ -d "/mnt/node0${CONTAINERD_DIR_K3S}" ]; then
                 echo "Gitpod: containerd dir detected as k3s"

install/kots/manifests/gitpod-shiftfs-module-loader.yaml

@@ -0,0 +1,39 @@
+# Copyright (c) 2022 Gitpod GmbH. All rights reserved.
+# Licensed under the MIT License. See License-MIT.txt in the project root for license information.
+
+# This job is allowed to fail as will default to fuse
+apiVersion: batch/v1
+kind: Job
+metadata:
+  name: shiftfs-module-loader-{{repl Cursor }}
+  labels:
+    app: gitpod
+    component: shiftfs-module-loader
+spec:
+  ttlSecondsAfterFinished: 60
+  activeDeadlineSeconds: 30
+  backoffLimit: 1
+  parallelism: 1
+  template:
+    metadata:
+      labels:
+        app: gitpod
+        component: shiftfs-module-loader
+    spec:
+      serviceAccountName: installer
+      restartPolicy: Never
+      containers:
+        - name: shiftfs-module-loader
+          # This is the current valid tag. This will be auto-updated by the Werft job
+          image: eu.gcr.io/gitpod-core-dev/build/shiftfs-module-loader:commit-ab235e8bc00f2c1ac70232cea17e5df9a9d262fa
+          securityContext:
+            privileged: true
+          volumeMounts:
+            - mountPath: /usr/src_node
+              name: node-linux-src
+              readOnly: true
+      volumes:
+        - name: node-linux-src
+          hostPath:
+            path: /usr/src
+            type: Directory