hrval-action

This GitHub action validates a Flux Helm Release Kubernetes custom resources with kubeval.

Steps:

• installs kubectl, yq, kubeval, helm v2 and v3
• extracts the chart source with yq
• downloads the chart from the Helm or Git repository
• extracts the Helm Release values with yq
• runs helm template for the extracted values
• validates the YAMLs using kubeval strict mode

Usage

Validate Helm release custom resources:

name: CI

on: [push, pull_request]

jobs:
  hrval:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v1
      - name: Validate Helm Releases in test dir
        uses: stefanprodan/[email protected]
        with:
          helmRelease: test/
      - name: Validate Helm Release from Helm Repo
        uses: stefanprodan/[email protected]
        with:
          helmRelease: test/flagger.yaml
          helmVersion: v2
          kubernetesVersion: 1.16.0
      - name: Validate Helm Release from Git Repo
        uses: stefanprodan/[email protected]
        with:
          helmRelease: test/podinfo.yaml
          helmVersion: v3
          kubernetesVersion: master
          ignoreValues: true

Output:

Processing test/flagger.yaml
Downloading to /tmp/tmp.TuA4QzCOG7
Extracting values to /tmp/tmp.TuA4QzCOG7/flagger.values.yaml
Writing Helm release to /tmp/tmp.TuA4QzCOG7/flagger.release.yaml
Validating Helm release flagger.flagger-system against Kubernetes 1.16.0
WARN - Set to ignore missing schemas
PASS - flagger/templates/psp.yaml contains a valid PodSecurityPolicy
PASS - flagger/templates/psp.yaml contains a valid ClusterRole
PASS - flagger/templates/psp.yaml contains a valid RoleBinding
PASS - flagger/templates/account.yaml contains a valid ServiceAccount
WARN - flagger/templates/crd.yaml containing a CustomResourceDefinition was not validated against a schema
PASS - flagger/templates/prometheus.yaml contains a valid ClusterRole
PASS - flagger/templates/prometheus.yaml contains a valid ClusterRoleBinding
PASS - flagger/templates/prometheus.yaml contains a valid ServiceAccount
PASS - flagger/templates/prometheus.yaml contains a valid ConfigMap
PASS - flagger/templates/prometheus.yaml contains a valid Deployment
PASS - flagger/templates/prometheus.yaml contains a valid Service
PASS - flagger/templates/rbac.yaml contains a valid ClusterRole
PASS - flagger/templates/rbac.yaml contains a valid ClusterRoleBinding
PASS - flagger/templates/deployment.yaml contains a valid Deployment

Usage with private charts repositories

To allow the action to be able to clone private charts repositories, you must create a GitHub private access token and add it as a secret to the target repository. NOTE: secret names cannot start with GITHUB_ as these are reserved.

You can then pass the secret (in this case, GH_TOKEN) into the action like so:

name: CI

on: [push, pull_request]

jobs:
  hrval:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v1
      - name: Validate Helm Releases in test dir
        uses: stefanprodan/[email protected]
        with:
          helmRelease: test/
        env:
          GITHUB_TOKEN: ${{ secrets.GH_TOKEN }}

CI alternatives

The validation scripts can be used in any CI system.

CircleCI example:

version: 2.1
jobs:
  hrval:
    docker:
      - image: stefanprodan/hrval
    steps:
      - checkout
      - run:
          name: Validate Helm Releases in test dir
          command: |
            IGNORE_VALUES=false
            KUBE_VER=master
            HELM_VER=v2

            hrval test/ $IGNORE_VALUES $KUBE_VER $HELM_VER