[bitnami/spring-cloud-dataflow] Bump JDK versions for Spring Cloud Dataflow images

[OmegaVVeapon]

Affected images:

• bitnami/spring-cloud-dataflow:2.10.0-debian-11-r14
• bitnami/prometheus-rsocket-proxy:1.5.0-debian-11-r61

What steps will reproduce the bug?

1. Deploy a pod using Kubernetes 1.25 with bitnami/spring-cloud-dataflow:2.10.0-debian-11-r14 and/or bitnami/prometheus-rsocket-proxy:1.5.0-debian-11-r61 with CPU and memory limits.

What is the expected behavior?

The containers should respect the Kubernetes resource limits

What do you see instead?

The containers use more than the allotted memory and are OOMKilled.

Additional information

The SCDF image
https://github.com/bitnami/containers/blob/main/bitnami/spring-cloud-dataflow/2/debian-11/Dockerfile#L26

and the Prometheus Rsocket Proxy image
https://github.com/bitnami/containers/blob/main/bitnami/prometheus-rsocket-proxy/1/debian-11/Dockerfile#L25

both use JDK 8.

In the most recent upgrade of Kubernetes 1.25, cgroups v2 has been activated by default.
https://kubernetes.io/docs/concepts/architecture/cgroups/#cgroup-v2

However, there's an issue in which JDK 8 does NOT respect the resource limits which k8s imposes using cgroups v2.
As a result, the containers push past their allotted CPU and memory and get constantly getting OOMKilled.

See: https://blog.kintone.io/entry/2022/03/08/170206
and Azure/AKS#3443

Due to this, we'd like to request upgrading the JDK version used in these images, ideally to JDK 17 as it's the only LTS version that natively understands cgroups v2.
https://endoflife.date/java

I've run some tests by rebuilding these images using JDK 15 and can confirm that the issues do not occur there.

[javsalgar]

Thank you so much for the insight! I will forward this to the engineering team

[OmegaVVeapon]

SCDF Server was upgraded to JDK 17:
https://github.com/bitnami/containers/blob/main/bitnami/spring-cloud-dataflow/2/debian-11/Dockerfile#L26
and it fixed the cgroups v2 issue as expected.

Thank you!

Now only the Prometheus Rsocket Proxy is missing.
https://github.com/bitnami/containers/blob/main/bitnami/prometheus-rsocket-proxy/1/debian-11/Dockerfile#L25

@javsalgar would you accept a PR for this change if I send one?

[rafariossaa]

Hi,
Sorry for the long delay.
Sure !! We are hesitant to receive PRs fixing or adding features.
Please, feel free to send a PR we will be glad to review and merge it.
Thanks

[github-actions]

This Issue has been automatically marked as "stale" because it has not had recent activity (for 15 days). It will be closed if no further activity occurs. Thanks for the feedback.

[github-actions]

Due to the lack of activity in the last 5 days since it was marked as "stale", we proceed to close this Issue. Do not hesitate to reopen it later if necessary.