chore(test): add selfhosted runner for e2e tests

Author: aardbol

.github/workflows/_reusable-e2e.yaml

@@ -16,7 +16,7 @@ env:
 
 jobs:
   deploy:
-    runs-on: ubuntu-24.04
+    runs-on: [self-hosted, linux, upcloud-csi]
     steps:
       - uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0
 

deploy/github-runner/values.yaml

@@ -0,0 +1,54 @@
+---
+# GitHub Actions Runner Controller — Runner Scale Set configuration
+#
+# Prerequisites:
+#   1. Install the controller (one-time per cluster):
+#        helm upgrade --install arc \
+#          oci://ghcr.io/actions/actions-runner-controller-charts/gha-runner-scale-set-controller \
+#          --namespace arc-system --create-namespace
+#
+#   2. Install the runner scale set (per repository):
+#        helm upgrade --install upcloud-csi-runner \
+#          oci://ghcr.io/actions/actions-runner-controller-charts/gha-runner-scale-set \
+#          --namespace arc-runners --create-namespace \
+#          --values deploy/github-runner/values.yaml \
+#          --set githubConfigSecret.github_token=$GITHUB_PAT
+#
+# Requires a PAT with repo scope, or a GitHub App installation.
+# See: https://docs.github.com/en/actions/hosting-your-own-runners/managing-self-hosted-runners-with-actions-runner-controller
+
+# Repository-level runner (change to org-level URL if preferred)
+githubConfigUrl: "https://github.com/upcloud-tools/upcloud-csi"
+
+# Runner labels for workflow targeting
+scaleSetLabels:
+  - self-hosted
+  - linux
+  - upcloud-csi
+
+# Authentication via GitHub PAT (alternative: GitHub App)
+# githubConfigSecret:
+#   github_token: ""
+
+# Reference the controller service account explicitly to avoid discovery issues
+controllerServiceAccount:
+  namespace: arc-system
+  name: arc-gha-rs-controller
+
+# Autoscaling limits
+maxRunners: 10
+minRunners: 1
+
+# Runner pod configuration
+template:
+  spec:
+    containers:
+      - name: runner
+        image: ghcr.io/actions/actions-runner:latest
+        command: ["/home/runner/run.sh"]
+        resources:
+          requests:
+            cpu: "1"
+            memory: "2Gi"
+          limits:
+            memory: "4Gi"