Fix runner label issues (#739)

### Description of the change

This addresses 2 bugs regarding configured runner labels:
- `Cannot find: node in PATH` due to a default label that matches the runner host, not the docker-in-docker environment
- After changing the runner config, users have to manually replace the StatefulSet Pod of the runner

### Benefits

- Out-of-the-box functioning node environment
- Auto-updated runner config on changes in values

### Applicable issues

- fixes https://gitea.com/gitea/helm-chart/issues/728
- fixes https://gitea.com/gitea/helm-chart/issues/725

### Additional information

With removing the default labels from `values.yaml`, the act runner defaults will be used for new runners which fixes the "missing node" issue.
I had issues replacing the labels once the Chart defaults were used, so users might have to replace their runner manually if this is an issue.

### Checklist

- [x] Templating unittests are added

Signed-off-by: justusbunsi <sk.bunsenbrenner@gmail.com>

Reviewed-on: https://gitea.com/gitea/helm-chart/pulls/739
Co-authored-by: justusbunsi <sk.bunsenbrenner@gmail.com>
Co-committed-by: justusbunsi <sk.bunsenbrenner@gmail.com>

templates/gitea/act_runner/statefulset.yaml

@@ -21,6 +21,8 @@ spec:
       {{- include "gitea.selectorLabels.actRunner" . | nindent 6 }}
   template:
     metadata:
+      annotations:
+        checksum/config: {{ include (print $.Template.BasePath "/gitea/act_runner/config-act-runner.yaml") . | sha256sum }}
       labels:
         {{- include "gitea.labels.actRunner" . | nindent 8 }}
         {{- with .Values.actions.statefulset.labels }}

unittests/act_runner/statefulset.yaml

@@ -4,6 +4,7 @@ release:
   namespace: testing
 templates:
   - templates/gitea/act_runner/statefulset.yaml
+  - templates/gitea/act_runner/config-act-runner.yaml
 tests:
   - it: doesn't renders a StatefulSet by default
     template: templates/gitea/act_runner/statefulset.yaml
@@ -54,6 +55,24 @@ tests:
               secretKeyRef:
                 name: "gitea-unittests-actions-token"
                 key: "token"
+  - it: renders a StatefulSet (that tracks changes of the runner configuration as annotation)
+    template: templates/gitea/act_runner/statefulset.yaml
+    set:
+      image.tag: "1.22.3" # lock image tag to prevent test failures on future Gitea upgrades
+      actions:
+        enabled: true
+        existingSecret: "my-secret"
+        existingSecretKey: "my-secret-key"
+    asserts:
+      - hasDocuments:
+          count: 1
+      - containsDocument:
+          kind: StatefulSet
+          apiVersion: apps/v1
+          name: gitea-unittests-act-runner
+      - equal:
+          path: spec.template.metadata.annotations["checksum/config"]
+          value: "2a2200e80fc29111d18b675789c265cd3d5f917754850f946f1ce3c55dcd65f8"
   - it: renders a StatefulSet (with correct GITEA_INSTANCE_URL env with default act-runner specific LOCAL_ROOT_URL)
     template: templates/gitea/act_runner/statefulset.yaml
     set:

values.yaml

@@ -397,14 +397,12 @@ actions:
       tag: 0.2.11
       pullPolicy: IfNotPresent
 
+      # See full example here: https://gitea.com/gitea/act_runner/src/branch/main/internal/pkg/config/config.example.yaml
       config: |
         log:
           level: debug
         cache:
           enabled: false
-        runner:
-          labels:
-            - "ubuntu-latest"
 
     dind:
       repository: docker