Add spec.revisionHistoryLimit config possibility for Deployment resource (#122)

* Add spec.revisionHistoryLimit config possibility for Deployment resource

Signed-off-by: Marcel Hoyer <mhoyer@pixelplastic.de>

* Fix order of values in README.md

Signed-off-by: Marcel Hoyer <mhoyer@pixelplastic.de>

---------

Signed-off-by: Marcel Hoyer <mhoyer@pixelplastic.de>

Author: mhoyer

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: 1.1.3
+version: 1.2.0

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: 1.1.3](https://img.shields.io/badge/Version-1.1.3-informational?style=flat-square)
+![Version: 1.2.0](https://img.shields.io/badge/Version-1.2.0-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
@@ -142,6 +142,7 @@ Kubernetes: `>= 1.19.0-0`
 | 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.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.tolerations | Node tolerations for server scheduling to nodes with taints <br /> Ref: https://kubernetes.io/docs/concepts/scheduling-eviction/taint-and-toleration/ | list | `[]` |
 | clusterDomain | Default Kubernetes cluster domain | string | `"cluster.local"` |
 | commonAnnotations | Annotations to add to all deployed objects | object | `{}` |

charts/backstage/templates/backstage-deployment.yaml

@@ -21,6 +21,7 @@ metadata:
     {{- end }}
 spec:
   replicas: {{ .Values.backstage.replicas }}
+  revisionHistoryLimit: {{ .Values.backstage.revisionHistoryLimit }}
   selector:
     matchLabels: {{- include "common.labels.matchLabels" . | nindent 6 }}
       app.kubernetes.io/component: backstage

charts/backstage/values.schema.json

@@ -174,6 +174,12 @@
                     "minimum": 0,
                     "default": 1
                 },
+                "revisionHistoryLimit": {
+                    "title": "The count of deployment revisions",
+                    "type": "integer",
+                    "minimum": 0,
+                    "default": 10
+                },
                 "image": {
                     "title": "Image parameters",
                     "type": "object",

charts/backstage/values.yaml

@@ -83,6 +83,10 @@ backstage:
   # -- Number of deployment replicas
   replicas: 1
 
+  # -- 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.
+  revisionHistoryLimit: 10
+
   image:
 
     # -- Backstage image registry