azagrebin 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_r408000408
##########
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:
Thanks for the feedback @zhengcanbin
We might want to investigate your experience. Previously, we did not have
the retry discussed in this PR. Therefore, there may be other sources of these
infinite creation requests, e.g. from the #onError callback, depending how the
k8s client works internally.
If there is already an issue for your problem (or you could create one),
could you link to https://issues.apache.org/jira/browse/FLINK-17127 or share
your problem there? We might want to have a back-off also for the #onError
callback depending on the actual problem.
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