wangyang0918 commented on a change in pull request #11427: [FLINK-15790][k8s]
Make FlinkKubeClient and its implementations asynchronous
URL: https://github.com/apache/flink/pull/11427#discussion_r405429899
##########
File path:
flink-kubernetes/src/main/java/org/apache/flink/kubernetes/kubeclient/Fabric8FlinkKubeClient.java
##########
@@ -61,158 +61,180 @@
private final String clusterId;
private final String nameSpace;
- public Fabric8FlinkKubeClient(Configuration flinkConfig,
KubernetesClient client) {
+ private final ExecutorWrapper executorWrapper;
+
+ public Fabric8FlinkKubeClient(Configuration flinkConfig,
KubernetesClient client, ExecutorWrapper executorWrapper) {
this.flinkConfig = checkNotNull(flinkConfig);
this.internalClient = checkNotNull(client);
this.clusterId =
checkNotNull(flinkConfig.getString(KubernetesConfigOptions.CLUSTER_ID));
this.nameSpace =
flinkConfig.getString(KubernetesConfigOptions.NAMESPACE);
+
+ this.executorWrapper = executorWrapper;
}
@Override
- public void createJobManagerComponent(KubernetesJobManagerSpecification
kubernetesJMSpec) {
+ public CompletableFuture<Void>
createJobManagerComponent(KubernetesJobManagerSpecification kubernetesJMSpec) {
final Deployment deployment = kubernetesJMSpec.getDeployment();
final List<HasMetadata> accompanyingResources =
kubernetesJMSpec.getAccompanyingResources();
// create Deployment
LOG.debug("Start to create deployment with spec {}",
deployment.getSpec().toString());
- final Deployment createdDeployment = this.internalClient
- .apps()
- .deployments()
- .inNamespace(this.nameSpace)
- .create(deployment);
-
- // Note that we should use the uid of the created Deployment
for the OwnerReference.
- setOwnerReference(createdDeployment, accompanyingResources);
- this.internalClient
- .resourceList(accompanyingResources)
- .inNamespace(this.nameSpace)
- .createOrReplace();
+ return CompletableFuture.runAsync(() -> {
+ final Deployment createdDeployment = this.internalClient
+ .apps()
+ .deployments()
+ .inNamespace(this.nameSpace)
+ .create(deployment);
+
+ // Note that we should use the uid of the created
Deployment for the OwnerReference.
+ setOwnerReference(createdDeployment,
accompanyingResources);
+
+ this.internalClient
+ .resourceList(accompanyingResources)
+ .inNamespace(this.nameSpace)
+ .createOrReplace();
+ }, executorWrapper.getExecutor());
}
@Override
public void createTaskManagerPod(KubernetesPod kubernetesPod) {
- final Deployment masterDeployment = this.internalClient
- .apps()
- .deployments()
- .inNamespace(this.nameSpace)
- .withName(KubernetesUtils.getDeploymentName(clusterId))
- .get();
-
- if (masterDeployment == null) {
- throw new RuntimeException(
- "Failed to find Deployment named " + clusterId
+ " in namespace " + this.nameSpace);
- }
+ CompletableFuture.runAsync(() -> {
Review comment:
This is a valid concern. I am afraid `fabric8` and `okHttpClient` could not
cover this situation. Regarding to a follow-up, i tend to fix it in this PR.
I will move the retry logic into the `FlinkKubeClient#createTaskManagerPod`.
In `KubernetesResourceManager kubeClient.createTaskManagerPod#whenComplete`, we
just log the error. This could avoid the infinite retry. So when the K8s
cluster is down with long-time, the slot allocation will timeout in
`JobMaster#SlotPool`, and it will allocate again.
WDYT?
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