ClusterProfile dependsOn field

Introduction to dependsOn

ClusterProfile instances can leverage other ClusterProfiles to establish a deployment order for add-ons and applications. The dependsOn fields enables the definition of prerequisite ClusterProfiles. Within any managed cluster that matches the current ClusterProfile, the deployment of different add-ons and applications will start once all add-ons and applications in the specified dependency ClusterProfiles have been successfully deployed.

Example: Kyverno ClusterProfiles

The below examaple displays a ClusterProfile which encapsulates all Kyverno policies for a cluster and declares a ClusterProfile dependency named kyverno, which is responsible for installing the Kyverno Helm chart.

  apiVersion: config.projectsveltos.io/v1alpha1
  kind: ClusterProfile
  metadata:
    name: kyverno-policies
  spec:
    clusterSelector: env=fv
    dependsOn:
    - kyverno
    policyRefs:
    - deploymentType: Remote
      kind: ConfigMap
      name: disallow-latest-tag
      namespace: default
      kind: ConfigMap
      name: restrict-wildcard-verbs
      namespace: default

¹

  apiVersion: config.projectsveltos.io/v1alpha1
  kind: ClusterProfile
  metadata:
    name: kyverno
  spec:
    clusterSelector: env=fv
    helmCharts:
    - chartName: kyverno/kyverno
      chartVersion: v3.0.1
      helmChartAction: Install
      releaseName: kyverno-latest
      releaseNamespace: kyverno
      repositoryName: kyverno
      repositoryURL: https://kyverno.github.io/kyverno/

Example: Kyverno and Kubevela ClusterProfile

In the below YAML definitions, the ClusterProfile instance cp-kubevela relies on the ClusterProfile instance cp-kyverno. That means that the cp-kyverno ClusterProfile add-ons will get deployed to clusters matching the label set to env=prod and afterwards, the ClusterProfile cp-kubevela will take place.

apiVersion: config.projectsveltos.io/v1alpha1
kind: ClusterProfile 
metadata: 
  name: cp-kubevela
spec:
  dependsOn:
  - cp-kyverno
  clusterSelector: env=production
  syncMode: Continuous
  helmCharts:
  - repositoryURL: https://kubevela.github.io/charts
    repositoryName: kubevela
    chartName: kubevela/vela-core
    chartVersion: 1.9.6
    releaseName: kubevela-core-latest
    releaseNamespace: vela-system
    helmChartAction: Install

apiVersion: config.projectsveltos.io/v1alpha1
kind: ClusterProfile
metadata:
  name: cp-kyverno
spec:
  clusterSelector: env=prod
  helmCharts:
  - repositoryURL:    https://kyverno.github.io/kyverno/
    repositoryName:   kyverno
    chartName:        kyverno/kyverno
    chartVersion:     v3.0.1
    releaseName:      kyverno-latest
    releaseNamespace: kyverno
    helmChartAction:  Install

The above example is equivalent of creating a single ClusterProfile.

apiVersion: config.projectsveltos.io/v1alpha1
kind: ClusterProfile
metadata:
  name: cp-kyverno
spec:
  clusterSelector: env=prod
  helmCharts:
  - repositoryURL:    https://kyverno.github.io/kyverno/
    repositoryName:   kyverno
    chartName:        kyverno/kyverno
    chartVersion:     v3.0.1
    releaseName:      kyverno-latest
    releaseNamespace: kyverno
    helmChartAction:  Install
  - repositoryURL: https://kubevela.github.io/charts
    repositoryName: kubevela
    chartName: kubevela/vela-core
    chartVersion: 1.9.6
    releaseName: kubevela-core-latest
    releaseNamespace: vela-system
    helmChartAction: Install

Note: Separate ClusterProfiles promote better organization and maintainability, especially when different teams or individuals manage different ClusterProfiles.

---

1. To create the ConfigMaps with Kyverno policies used in this example

   $ wget https://raw.githubusercontent.com/kyverno/policies/main/best-practices/disallow-latest-tag/disallow-latest-tag.yaml
   
   $ kubectl create configmap disallow-latest-tag --from-file disallow-latest-tag.yaml
   
   $ wget https://raw.githubusercontent.com/kyverno/policies/main/other/res/restrict-wildcard-verbs/restrict-wildcard-verbs.yaml
   
   $ kubectl create configmap restrict-wildcard-verbs --from-file restrict-wildcard-verbs.yaml
   

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