fix!: Use builtin probe endpoints

These are `/.backstage/health/v1/readiness` and `/.backstage/health/v1/liveness` and were added in v1.29 Ref: https://backstage.io/docs/releases/v1.29.0#backend-health-service Signed-off-by: Nikolai Røed Kristiansen <[email protected]>
backstage · Oct 18, 2024 · 4da976e · 4da976e
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Showing 5 changed files with 49 additions and 20 deletions.
diff --git a/charts/backstage/Chart.yaml b/charts/backstage/Chart.yaml
@@ -38,4 +38,4 @@ sources:
 # This is the chart version. This version number should be incremented each time you make changes
 # to the chart and its templates, including the app version.
 # Versions are expected to follow Semantic Versioning (https://semver.org/)
-version: 1.11.0
+version: 2.0.0
diff --git a/charts/backstage/README.md b/charts/backstage/README.md
@@ -2,7 +2,7 @@
 # Backstage Helm Chart
 
 [![Artifact Hub](https://img.shields.io/endpoint?url=https://artifacthub.io/badge/repository/backstage)](https://artifacthub.io/packages/search?repo=backstage)
-![Version: 1.11.0](https://img.shields.io/badge/Version-1.11.0-informational?style=flat-square)
+![Version: 2.0.0](https://img.shields.io/badge/Version-2.0.0-informational?style=flat-square)
 ![Type: application](https://img.shields.io/badge/Type-application-informational?style=flat-square)
 
 A Helm chart for deploying a Backstage application
@@ -135,16 +135,15 @@ Kubernetes: `>= 1.19.0-0`
 | backstage.image.tag | Backstage image tag (immutable tags are recommended) | string | `"latest"` |
 | backstage.initContainers | Backstage container init containers | list | `[]` |
 | backstage.installDir | Directory containing the backstage installation | string | `"/app"` |
-| backstage.livenessProbe | Liveness Probe Backstage doesn't provide any health endpoints by default. A simple one can be added like this: https://backstage.io/docs/plugins/observability/#health-checks <br /> Ref: https://kubernetes.io/docs/tasks/configure-pod-container/configure-liveness-readiness-startup-probes <!-- E.g. livenessProbe:   failureThreshold: 3   httpGet:     path: /healthcheck     port: 7007     scheme: HTTP   initialDelaySeconds: 60   periodSeconds: 10   successThreshold: 1   timeoutSeconds: 2 | object | `{}` |
+| backstage.livenessProbe | Liveness Probe Backstage doesn't provide any health endpoints by default. A simple one can be added like this: https://backstage.io/docs/plugins/observability/#health-checks <br /> Ref: https://kubernetes.io/docs/tasks/configure-pod-container/configure-liveness-readiness-startup-probes <!-- E.g. livenessProbe:   failureThreshold: 3   httpGet:     path: /.backstage/health/v1/liveness     port: 7007     scheme: HTTP   initialDelaySeconds: 60   periodSeconds: 10   successThreshold: 1   timeoutSeconds: 2 | object | `{"httpGet":{"path":"/.backstage/health/v1/liveness","port":7007,"scheme":"HTTP"}}` |
 | backstage.nodeSelector | Node labels for pod assignment <br /> Ref: https://kubernetes.io/docs/concepts/scheduling-eviction/assign-pod-node/#nodeselector | object | `{}` |
 | backstage.podAnnotations | Annotations to add to the backend deployment pods | object | `{}` |
 | backstage.podLabels | Labels to add to the backend deployment pods | object | `{}` |
 | backstage.podSecurityContext | Security settings for a Pod.  The security settings that you specify for a Pod apply to all Containers in the Pod. <br /> Ref: https://kubernetes.io/docs/tasks/configure-pod-container/security-context/#set-the-security-context-for-a-pod | object | `{}` |
-| backstage.readinessProbe | Readiness Probe Backstage doesn't provide any health endpoints by default. A simple one can be added like this: https://backstage.io/docs/plugins/observability/#health-checks <br /> Ref: https://kubernetes.io/docs/tasks/configure-pod-container/configure-liveness-readiness-startup-probes <!-- E.g. readinessProbe:   failureThreshold: 3   httpGet:     path: /healthcheck     port: 7007     scheme: HTTP   initialDelaySeconds: 30   periodSeconds: 10   successThreshold: 2   timeoutSeconds: 2 | object | `{}` |
+| backstage.readinessProbe | Readiness Probe Backstage doesn't provide any health endpoints by default. A simple one can be added like this: https://backstage.io/docs/plugins/observability/#health-checks <br /> Ref: https://kubernetes.io/docs/tasks/configure-pod-container/configure-liveness-readiness-startup-probes <!-- E.g. readinessProbe:   failureThreshold: 3   httpGet:     path: /.backstage/health/v1/readiness     port: 7007     scheme: HTTP   initialDelaySeconds: 30   periodSeconds: 10   successThreshold: 2   timeoutSeconds: 2 | object | `{"httpGet":{"path":"/.backstage/health/v1/readiness","port":7007,"scheme":"HTTP"}}` |
 | backstage.replicas | Number of deployment replicas | int | `1` |
 | backstage.resources | Resource requests/limits <br /> Ref: https://kubernetes.io/docs/concepts/configuration/manage-resources-containers/#resource-requests-and-limits-of-pod-and-container <!-- E.g. resources:   limits:     memory: 1Gi     cpu: 1000m   requests:     memory: 250Mi     cpu: 100m --> | object | `{}` |
 | backstage.revisionHistoryLimit | Define the [count of deployment revisions](https://kubernetes.io/docs/concepts/workloads/controllers/deployment/#clean-up-policy) to be kept. May be set to 0 in case of GitOps deployment approach. | int | `10` |
-| backstage.startupProbe | Startup Probe Backstage doesn't provide any health endpoints by default. A simple one can be added like this: https://backstage.io/docs/plugins/observability/#health-checks <br /> Ref: https://kubernetes.io/docs/tasks/configure-pod-container/configure-liveness-readiness-startup-probes <!-- E.g. startupProbe:   failureThreshold: 3   httpGet:     path: /healthcheck     port: 7007     scheme: HTTP   initialDelaySeconds: 60   periodSeconds: 10   successThreshold: 1   timeoutSeconds: 2 | object | `{}` |
 | backstage.tolerations | Node tolerations for server scheduling to nodes with taints <br /> Ref: https://kubernetes.io/docs/concepts/scheduling-eviction/taint-and-toleration/ | list | `[]` |
 | backstage.topologySpreadConstraints | Topology Spread Constraints for pod assignment <br /> Ref: https://kubernetes.io/docs/concepts/scheduling-eviction/assign-pod-node/#pod-topology-spread-constraints | list | `[]` |
 | clusterDomain | Default Kubernetes cluster domain | string | `"cluster.local"` |

diff --git a/charts/backstage/ci/probes-values.yaml b/charts/backstage/ci/probes-values.yaml
@@ -15,7 +15,7 @@ backstage:
   readinessProbe:
     failureThreshold: 3
     httpGet:
-      path: /healthcheck
+      path: /.backstage/health/v1/readiness
       port: 7007
       scheme: HTTP
     initialDelaySeconds: 30
@@ -25,7 +25,7 @@ backstage:
   livenessProbe:
     failureThreshold: 3
     httpGet:
-      path: /healthcheck
+      path: /.backstage/health/v1/liveness
       port: 7007
       scheme: HTTP
     initialDelaySeconds: 60
@@ -35,7 +35,7 @@ backstage:
   startupProbe:
     failureThreshold: 3
     httpGet:
-      path: /healthcheck
+      path: /.backstage/health/v1/liveness
       port: 7007
       scheme: HTTP
     initialDelaySeconds: 60

diff --git a/charts/backstage/values.schema.tmpl.json b/charts/backstage/values.schema.tmpl.json
@@ -455,12 +455,18 @@
                     "title": "Readiness probe",
                     "description": "Ref: https://kubernetes.io/docs/tasks/configure-pod-container/configure-liveness-readiness-startup-probes/",
                     "$ref": "https://raw.githubusercontent.com/yannh/kubernetes-json-schema/master/master/_definitions.json#/definitions/io.k8s.api.core.v1.Probe",
-                    "default": {},
+                    "default": {
+                        "httpGet": {
+                                "path": "/.backstage/health/v1/readiness",
+                                "port": 7007,
+                                "scheme": "HTTP"
+                            }
+                    },
                     "examples": [
                         {
                             "failureThreshold": 3,
                             "httpGet": {
-                                "path": "/healthcheck",
+                                "path": "/.backstage/health/v1/readiness",
                                 "port": 7007,
                                 "scheme": "HTTP"
                             },
@@ -475,12 +481,18 @@
                     "title": "Liveness probe",
                     "description": "Ref: https://kubernetes.io/docs/tasks/configure-pod-container/configure-liveness-readiness-startup-probes/",
                     "$ref": "https://raw.githubusercontent.com/yannh/kubernetes-json-schema/master/master/_definitions.json#/definitions/io.k8s.api.core.v1.Probe",
-                    "default": {},
+                    "default": {
+                        "httpGet": {
+                            "path": "/.backstage/health/v1/liveness",
+                            "port": 7007,
+                            "scheme": "HTTP"
+                        }
+                    },
                     "examples": [
                         {
                             "failureThreshold": 3,
                             "httpGet": {
-                                "path": "/healthcheck",
+                                "path": "/.backstage/health/v1/liveness",
                                 "port": 7007,
                                 "scheme": "HTTP"
                             },
@@ -495,12 +507,18 @@
                     "title": "Startup probe",
                     "description": "Ref: https://kubernetes.io/docs/tasks/configure-pod-container/configure-liveness-readiness-startup-probes/",
                     "$ref": "https://raw.githubusercontent.com/yannh/kubernetes-json-schema/master/master/_definitions.json#/definitions/io.k8s.api.core.v1.Probe",
-                    "default": {},
+                    "default": {
+                        "httpGet": {
+                            "path": "/.backstage/health/v1/liveness",
+                            "port": 7007,
+                            "scheme": "HTTP"
+                        }
+                    },
                     "examples": [
                         {
                             "failureThreshold": 3,
                             "httpGet": {
-                                "path": "/healthcheck",
+                                "path": "/.backstage/health/v1/liveness",
                                 "port": 7007,
                                 "scheme": "HTTP"
                             },

diff --git a/charts/backstage/values.yaml b/charts/backstage/values.yaml
@@ -189,14 +189,18 @@ backstage:
   # readinessProbe:
   #   failureThreshold: 3
   #   httpGet:
-  #     path: /healthcheck
+  #     path: /.backstage/health/v1/readiness
   #     port: 7007
   #     scheme: HTTP
   #   initialDelaySeconds: 30
   #   periodSeconds: 10
   #   successThreshold: 2
   #   timeoutSeconds: 2
-  readinessProbe: {}
+  readinessProbe:
+    httpGet:
+      path: /.backstage/health/v1/readiness
+      port: 7007
+      scheme: HTTP
 
   # -- Liveness Probe
   # Backstage doesn't provide any health endpoints by default. A simple one can be added like this: https://backstage.io/docs/plugins/observability/#health-checks
@@ -205,14 +209,18 @@ backstage:
   # livenessProbe:
   #   failureThreshold: 3
   #   httpGet:
-  #     path: /healthcheck
+  #     path: /.backstage/health/v1/liveness
   #     port: 7007
   #     scheme: HTTP
   #   initialDelaySeconds: 60
   #   periodSeconds: 10
   #   successThreshold: 1
   #   timeoutSeconds: 2
-  livenessProbe: {}
+  livenessProbe:
+    httpGet:
+      path: /.backstage/health/v1/liveness
+      port: 7007
+      scheme: HTTP
 
     # -- Startup Probe
   # Backstage doesn't provide any health endpoints by default. A simple one can be added like this: https://backstage.io/docs/plugins/observability/#health-checks
@@ -221,14 +229,18 @@ backstage:
   # startupProbe:
   #   failureThreshold: 3
   #   httpGet:
-  #     path: /healthcheck
+  #     path: /.backstage/health/v1/liveness
   #     port: 7007
   #     scheme: HTTP
   #   initialDelaySeconds: 60
   #   periodSeconds: 10
   #   successThreshold: 1
   #   timeoutSeconds: 2
-  startupProbe: {}
+  startupProbe:
+    httpGet:
+      path: /.backstage/health/v1/liveness
+      port: 7007
+      scheme: HTTP
 
   # -- Security settings for a Pod.
   #  The security settings that you specify for a Pod apply to all Containers in the Pod.