Pulsar Shell: native image with GraalVM

[nicoloboschi]

Search before asking

• I searched in the issues and found nothing similar.

Motivation

Currently pulsar-shell is just a simple java application.
Nowadays GraalVM native image is a great way to package java CLI application into a optimized native binary.
Additionaly it removes the need to having a JDK installed

This might be a starting point here but it's not complete
but currently there are some issues about reflection because Pulsar/Netty uses the reflections a lot.

Solution

No response

Alternatives

No response

Anything else?

No response

Are you willing to submit a PR?

• I'm willing to submit a PR!

[github-actions[bot]]

The issue had no activity for 30 days, mark with Stale label.

[tisonkun]

Moved to the general discussion topic. This is hard to do because GraalVM requires developer to help marking all reflections and resources, as well as some subtle runtime issues.

Ref -

• https://www.graalvm.org/latest/reference-manual/native-image/dynamic-features/Reflection/
• https://www.graalvm.org/latest/reference-manual/native-image/guides/configure-with-tracing-agent/

I ever made a native image Java application at http://github.com/korandoru/hawkeye but it's far more simple than Pulsar Shell case.

[hpvd]

could Quarkus provide some help moving in this direction?

see

Quarkus tailors your application for GraalVM and HotSpot. Amazingly fast boot time, incredibly low RSS memory (not just heap size!) offering near instant scale up and high density memory utilization in container orchestration platforms like Kubernetes. We use a technique we call compile time boot.

https://quarkus.io/

[hpvd]

maybe this is not only interesting for Pulsar Shell, but also for other components of pulsar?

example from the other side:
Kafka broker (and Zookeeper) compiled to native using Quarkus and GraalVM
https://github.com/ozangunalp/kafka-native

[hpvd]

and if this "native" approach is thinkable, it may have a strong relationship to addressing the targets from
Build distroless package for better security, smaller size, speed and more #20253

[hpvd]

@tisonkun when making a discussion from an issue, comments in discussion seem not to remove the stale label automatically set before in the issue

[tisonkun]

Never mind. I manually remove it.

[hpvd]

perfect. thanks!