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Quickstart: Propagate resources from an Azure Kubernetes Fleet Manager (Fleet) hub cluster to member clusters

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In this quickstart, you learn how to propagate resources from an Azure Kubernetes Fleet Manager (Fleet) hub cluster to member clusters.

Prerequisites

If you don't have an Azure subscription, create an Azure free account before you begin.

Use the ClusterResourcePlacement API to propagate resources to member clusters

The ClusterResourcePlacement API object is used to propagate resources from a hub cluster to member clusters. The ClusterResourcePlacement API object specifies the resources to propagate and the placement policy to use when selecting member clusters. The ClusterResourcePlacement API object is created in the hub cluster and is used to propagate resources to member clusters. This example demonstrates how to propagate a namespace to member clusters using the ClusterResourcePlacement API object with a PickAll placement policy.

For more information, see Kubernetes resource propagation from hub cluster to member clusters (Preview) and the upstream Fleet documentation.

  1. Create a namespace to place onto the member clusters using the kubectl create namespace command. The following example creates a namespace named my-namespace:

    kubectl create namespace my-namespace

  2. Create a ClusterResourcePlacement API object in the hub cluster to propagate the namespace to the member clusters and deploy it using the kubectl apply -f command. The following example ClusterResourcePlacement creates an object named crp and uses the my-namespace namespace with a PickAll placement policy to propagate the namespace to all member clusters:

    kubectl apply -f - <<EOF
apiVersion: placement.kubernetes-fleet.io/v1beta1
kind: ClusterResourcePlacement
metadata:
  name: crp
spec:
  resourceSelectors:
    - group: ""
      kind: Namespace
      version: v1          
      name: my-namespace
  policy:
    placementType: PickAll
EOF

  3. Check the progress of the resource propagation using the kubectl get clusterresourceplacement command. The following example checks the status of the ClusterResourcePlacement object named crp:

    kubectl get clusterresourceplacement crp

    Your output should look similar to the following example output:

    NAME   GEN   SCHEDULED   SCHEDULEDGEN   APPLIED   APPLIEDGEN   AGE
crp    2     True        2              True      2            10s

  4. View the details of the crp object using the kubectl describe crp command. The following example describes the ClusterResourcePlacement object named crp:

    kubectl describe clusterresourceplacement crp

    Your output should look similar to the following example output:

    Name:         crp
Namespace:    
Labels:       <none>
Annotations:  <none>
API Version:  placement.kubernetes-fleet.io/v1beta1
Kind:         ClusterResourcePlacement
Metadata:
  Creation Timestamp:  2024-04-01T18:55:31Z
  Finalizers:
    kubernetes-fleet.io/crp-cleanup
    kubernetes-fleet.io/scheduler-cleanup
  Generation:        2
  Resource Version:  6949
  UID:               815b1d81-61ae-4fb1-a2b1-06794be3f986
Spec:
  Policy:
    Placement Type:  PickAll
  Resource Selectors:
    Group:                 
    Kind:                  Namespace
    Name:                  my-namespace
    Version:               v1
  Revision History Limit:  10
  Strategy:
    Type:  RollingUpdate
Status:
  Conditions:
    Last Transition Time:   2024-04-01T18:55:31Z
    Message:                found all the clusters needed as specified by the scheduling policy
    Observed Generation:    2
    Reason:                 SchedulingPolicyFulfilled
    Status:                 True
    Type:                   ClusterResourcePlacementScheduled
    Last Transition Time:   2024-04-01T18:55:36Z
    Message:                All 3 cluster(s) are synchronized to the latest resources on the hub cluster
    Observed Generation:    2
    Reason:                 SynchronizeSucceeded
    Status:                 True
    Type:                   ClusterResourcePlacementSynchronized
    Last Transition Time:   2024-04-01T18:55:36Z
    Message:                Successfully applied resources to 3 member clusters
    Observed Generation:    2
    Reason:                 ApplySucceeded
    Status:                 True
    Type:                   ClusterResourcePlacementApplied
  Observed Resource Index:  0
  Placement Statuses:
    Cluster Name:  membercluster1
    Conditions:
      Last Transition Time:  2024-04-01T18:55:31Z
      Message:               Successfully scheduled resources for placement in membercluster1 (affinity score: 0, topology spread score: 0): picked by scheduling policy
      Observed Generation:   2
      Reason:                ScheduleSucceeded
      Status:                True
      Type:                  ResourceScheduled
      Last Transition Time:  2024-04-01T18:55:36Z
      Message:               Successfully Synchronized work(s) for placement
      Observed Generation:   2
      Reason:                WorkSynchronizeSucceeded
      Status:                True
      Type:                  WorkSynchronized
      Last Transition Time:  2024-04-01T18:55:36Z
      Message:               Successfully applied resources
      Observed Generation:   2
      Reason:                ApplySucceeded
      Status:                True
      Type:                  ResourceApplied
    Cluster Name:            membercluster2
    Conditions:
      Last Transition Time:  2024-04-01T18:55:31Z
      Message:               Successfully scheduled resources for placement in membercluster2 (affinity score: 0, topology spread score: 0): picked by scheduling policy
      Observed Generation:   2
      Reason:                ScheduleSucceeded
      Status:                True
      Type:                  ResourceScheduled
      Last Transition Time:  2024-04-01T18:55:36Z
      Message:               Successfully Synchronized work(s) for placement
      Observed Generation:   2
      Reason:                WorkSynchronizeSucceeded
      Status:                True
      Type:                  WorkSynchronized
      Last Transition Time:  2024-04-01T18:55:36Z
      Message:               Successfully applied resources
      Observed Generation:   2
      Reason:                ApplySucceeded
      Status:                True
      Type:                  ResourceApplied
    Cluster Name:            membercluster3
    Conditions:
      Last Transition Time:  2024-04-01T18:55:31Z
      Message:               Successfully scheduled resources for placement in membercluster3 (affinity score: 0, topology spread score: 0): picked by scheduling policy
      Observed Generation:   2
      Reason:                ScheduleSucceeded
      Status:                True
      Type:                  ResourceScheduled
      Last Transition Time:  2024-04-01T18:55:36Z
      Message:               Successfully Synchronized work(s) for placement
      Observed Generation:   2
      Reason:                WorkSynchronizeSucceeded
      Status:                True
      Type:                  WorkSynchronized
      Last Transition Time:  2024-04-01T18:55:36Z
      Message:               Successfully applied resources
      Observed Generation:   2
      Reason:                ApplySucceeded
      Status:                True
      Type:                  ResourceApplied
  Selected Resources:
    Kind:     Namespace
    Name:     my-namespace
    Version:  v1
Events:
  Type    Reason                     Age   From                                   Message
  ----    ------                     ----  ----                                   -------
  Normal  PlacementScheduleSuccess   108s  cluster-resource-placement-controller  Successfully scheduled the placement
  Normal  PlacementSyncSuccess       103s  cluster-resource-placement-controller  Successfully synchronized the placement
  Normal  PlacementRolloutCompleted  103s  cluster-resource-placement-controller  Resources have been applied to the selected clusters

Clean up resources

If you no longer wish to use the ClusterResourcePlacement object, you can delete it using the kubectl delete command. The following example deletes the ClusterResourcePlacement object named crp:

kubectl delete clusterresourceplacement crp

Next steps

To learn more about resource propagation, see the following resources: