Fabric8io K8s java客户端是否支持使用YAML片段的patch（）或rollingupdate（）？

Question

我正在尝试通过将部署片段作为输入来编程k8s应用程序的补丁/滚动升级。我使用patch()方法将片段应用到现有部署上，作为使用Fabric8IO的k8s客户端API的rollingupdate的一部分。fabric8.ioKubernetes-Client版本4.10.1我还使用了Kubernetes-API 3.0.12.中的一些loadYaml帮助器方法

下面是我的示例代码段-adminpatch.yaml文件：

    kind: Deployment   
    spec:
      strategy:
        type: RollingUpdate
        rollingUpdate:
          maxSurge: 1
          maxUnavailable: 0     
      template:
        spec:
          containers:
            - name: ${PATCH_IMAGE_NAME}
              image: ${PATCH_IMAGE_URL}
              imagePullPolicy: Always

我正在将上面的文件内容（替换了所有的占位符）作为字符串发送到patchDeployment（）方法。下面是我对fabric8补丁（）方法的调用：

     public static String patchDeployment(String deploymentName, String namespace, String deploymentYaml) {
    try {
    Deployment deploymentSnippet = (Deployment) getK8sObject(deploymentYaml);
    if(deploymentSnippet instanceof Deployment) {
            logger.debug("Valid deployment object.");
    Deployment deployment = getK8sClient().apps().deployments().inNamespace(namespace).withName(deploymentName)
        .rolling().patch(deploymentSnippet);
    System.out.println(deployment.toString());
    return getLastConfig(deployment.getMetadata(), deployment);
    }
    } catch (Exception Ex) {
      Ex.printStackTrace();
    }
      return "Failed";
  }

它抛出以下异常：

> io.fabric8.kubernetes.client.KubernetesClientException: Failure
> executing: PATCH at:
> https://10.44.4.126:6443/apis/apps/v1/namespaces/default/deployments/patch-demo.
> Message: Deployment.apps "patch-demo" is invalid: spec.selector:
> Invalid value:
> v1.LabelSelector{MatchLabels:map[string]string{"app":"nginx",
> "deployment":"3470574ffdbd6e88d426a77dd951ed45"},
> MatchExpressions:[]v1.LabelSelectorRequirement(nil)}: field is
> immutable. Received status: Status(apiVersion=v1, code=422,
> details=StatusDetails(causes=[StatusCause(field=spec.selector,
> message=Invalid value:
> v1.LabelSelector{MatchLabels:map[string]string{"app":"nginx",
> "deployment":"3470574ffdbd6e88d426a77dd951ed45"},
> MatchExpressions:[]v1.LabelSelectorRequirement(nil)}: field is
> immutable, reason=FieldValueInvalid, additionalProperties={})],
> group=apps, kind=Deployment, name=patch-demo, retryAfterSeconds=null,
> uid=null, additionalProperties={}), kind=Status,
> message=Deployment.apps "patch-demo" is invalid: spec.selector:
> Invalid value:
> v1.LabelSelector{MatchLabels:map[string]string{"app":"nginx",
> "deployment":"3470574ffdbd6e88d426a77dd951ed45"},
> MatchExpressions:[]v1.LabelSelectorRequirement(nil)}: field is
> immutable, metadata=ListMeta(_continue=null, remainingItemCount=null,
> resourceVersion=null, selfLink=null, additionalProperties={}),
> reason=Invalid, status=Failure, additionalProperties={}).

我还使用kubectl patch deployment_name>-n --patch“$(cat adminpatch.yaml) 尝试了原始代码段（带有标签和选择器），这可以很好地应用相同的代码段。

我无法获得关于fabric8io k8s客户端补丁（）java API的大量文档。任何帮助都将不胜感激。

Answer 1

以下是Fabric8io滚动API中的相关bug:https://github.com/Fabric8io/kubernetes-client/issues/1868

到目前为止，我发现的一种使用fabri8io API进行修补的方法是：

1. 获取正在运行的部署对象
2. 用新容器添加/替换其中的容器
3. 使用createorreplace()API重新部署部署对象

但可以理解的是，您的补丁可能不仅仅是对containers字段的更新。在这种情况下，处理每个可编辑字段变得很混乱。

我继续使用正式K8s客户机的patchNamespacedDeployment（）API来实现修补。https://github.com/kubernetes-client/java/blob/356109457499862a581a951a710cd808d0b9c622/examples/src/main/java/io/kubernetes/client/examples/patchexample.java