feat(chart): automate helm json schema

.github/workflows/lint-test-chart.yaml

@@ -18,6 +18,25 @@ jobs:
         with:
           fetch-depth: 0
 
+      - name: Install Helm
+        uses: azure/setup-helm@fe7b79cd5ee1e45176fcad797de68ecaf3ca4814 # v4.2.0
+        with:
+          token: ${{ github.token }}
+          version: latest
+
+      - name: Run Helm Schema check
+        working-directory: charts/external-dns
+        run: |
+          set -euo pipefail
+
+          helm plugin install https://github.com/losisin/helm-values-schema-json.git
+          helm schema
+          if [[ -n "$(git status --porcelain --untracked-files=no)" ]]
+          then
+            echo "Schema not up to date. Please run helm schema and commit changes!" >&2
+            exit 1
+          fi
+
       - name: Install Helm Docs
         uses: action-stars/install-tool-from-github-release@ece2623611b240002e0dd73a0d685505733122f6 # v0.2.4
         with:
@@ -52,12 +71,6 @@ jobs:
       - name: Run Artifact Hub lint
         run: ah lint --kind helm || exit 1
 
-      - name: Install Helm
-        uses: azure/setup-helm@fe7b79cd5ee1e45176fcad797de68ecaf3ca4814 # v4.2.0
-        with:
-          token: ${{ github.token }}
-          version: latest
-
       - name: Install Python
         uses: actions/setup-python@42375524e23c412d93fb67b49958b491fce71c38 # v5.4.0
         with:

charts/external-dns/.helmignore

@@ -21,3 +21,6 @@
 .idea/
 *.tmproj
 .vscode/
+ci/
+schema/
+.schema.yaml

charts/external-dns/.schema.yaml

@@ -0,0 +1,11 @@
+# ref: https://github.com/losisin/helm-values-schema-json.git
+input:
+  - schema/values.yaml
+  - values.yaml
+
+draft: 7
+indent: 2
+output: values.schema.json
+
+schemaRoot:
+  additionalProperties: true

charts/external-dns/CHANGELOG.md

@@ -18,6 +18,15 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [UNRELEASED]
 
+### Added
+
+- Added ability to generate schema with `helm plugin schema`. ([#5075](https://github.com/kubernetes-sigs/external-dns/pull/5075)) _@ivankatliarchuk_
+- Added `docs/contributing/dev-guide.md#helm-values` guide. ([#5075](https://github.com/kubernetes-sigs/external-dns/pull/5075)) _@ivankatliarchuk_
+
+### Changed
+
+- Regenerate JSON schema with `helm-values-schema-json' plugin. ([#5075](https://github.com/kubernetes-sigs/external-dns/pull/5075)) _@ivankatliarchuk_
+
 ## [v1.15.2] - 2025-02-14
 
 ### Changed

charts/external-dns/README.md

@@ -151,7 +151,7 @@ If `namespaced` is set to `true`, please ensure that `sources` my only contains
 | secretConfiguration.subPath | string | `nil` | Sub-path for mounting the `Secret`, this can be templated. |
 | securityContext | object | See _values.yaml_ | [Security context](https://kubernetes.io/docs/tasks/configure-pod-container/security-context/#set-the-security-context-for-a-container) for the `external-dns` container. |
 | service.annotations | object | `{}` | Service annotations. |
-| service.ipFamilies | list | `[]` | Service IP families. |
+| service.ipFamilies | list | `[]` | Service IP families (e.g. IPv4 and/or IPv6). |
 | service.ipFamilyPolicy | string | `nil` | Service IP family policy. |
 | service.port | int | `7979` | Service HTTP port. |
 | serviceAccount.annotations | object | `{}` | Annotations to add to the service account. Templates are allowed in both the key and the value. Example: `example.com/annotation/{{ .Values.nameOverride }}: {{ .Values.nameOverride }}` |

charts/external-dns/schema/values.yaml

@@ -0,0 +1,19 @@
+# Custom values for schema creation.
+# This is a YAML-formatted file.
+# Declare variables to be passed into your schema.
+resources:
+  requests:
+    cpu: 200m
+    memory: 128Mi
+  limits:
+    cpu: 200m
+    memory: 128Mi
+
+provider:
+  webhook:
+    requests:
+      cpu: 200m
+      memory: 128Mi
+    limits:
+      cpu: 300m
+      memory: 200Mi