YurtAppSet

In the previous article we introduced the use of NodePool, mainly the creation and management of NodePool. Further, we developed the ability to deploy applications unitized based on NodePool to improve the efficiency of users' operations.

In this article, we will show how yurt-app-set can help users manage their workload. Assume we already have an OpenYurt cluster built on native kubernetes with at least two nodes.

1) Create YurtAppSet

• Create YurtAppSet by yurtappset_test.yaml to deploy nginx to nodepool np1xxxxxx, np2xxxxxx and any nodepool match label yurtappset.openyurt.io/type: "nginx". Make deployment in nodepool np2xxxxxx has different replicas, image version and labels.

apiVersion: apps.openyurt.io/v1beta1
kind: YurtAppSet
metadata:
  name: example
  namespace: default
spec:
  revisionHistoryLimit: 5
  pools:
    - np1xxxxxx
    - np2xxxxxx
  nodepoolSelector:
    matchLabels:
      yurtappset.openyurt.io/type: "nginx"
  workload:
    workloadTemplate:
      deploymentTemplate:
        metadata:
          labels:
            app: example
        spec:
          replicas: 2
          selector:
            matchLabels:
              app: example
          template:
            metadata:
              labels:
                app: example
            spec:
              containers:
                - image: nginx:1.19.1
                  imagePullPolicy: Always
                  name: nginx
    workloadTweaks:
      - pools:
          - np2xxxxxx
        tweaks:
          replicas: 3
          containerImages:
            - name: nginx
              targetImage: nginx:1.20.1
          patches:
            - path: /metadata/labels
              operation: add
              value: {"foo": "bar"}

• Check YurtAppSet

$ kubectl get yas
NAME      TOTAL   READY   UPDATED   AGE
example   2       2       2         84s

2) Check the deployments created by yurt-app-manager

$ kubectl get deploy
NAME                                               READY   UP-TO-DATE   AVAILABLE   AGE
example-np45a10e0d15114bbfa747ad0f02ede77f-pvpv6   2/2     2            2           3m46s
example-np93d46c5a4aa24702bb1d12b1641d0e43-fr25p   3/3     3            3           3m46s

$ kubectl get pod -l app=example
NAME                                                              READY   STATUS    RESTARTS   AGE
example-np45a10e0d15114bbfa747ad0f02ede77f-pvpv6-6f8fd8669ns9rq   1/1     Running   0          4m24s
example-np45a10e0d15114bbfa747ad0f02ede77f-pvpv6-6f8fd8669sn92q   1/1     Running   0          4m24s
example-np93d46c5a4aa24702bb1d12b1641d0e43-fr25p-6fcf7db4f7c967   1/1     Running   0          4m24s
example-np93d46c5a4aa24702bb1d12b1641d0e43-fr25p-6fcf7db4fgw977   1/1     Running   0          4m24s
example-np93d46c5a4aa24702bb1d12b1641d0e43-fr25p-6fcf7db4fnlvnl   1/1     Running   0          4m24s