How can I get the exit code from pods().exec()?

[stefanbethke]

I've use the example to run a command in a pod, and the command is executing successfully. However, I would like to capture the exit code, and I don't see any API method that allows me to do that.

$ kubectl exec -it mysql-0 -- true; echo $?
0
$ kubectl exec -it mysql-0 -- false; echo $?
command terminated with exit code 1
1

My Java code:

        SimpleExecListener listener = new SimpleExecListener();
        ByteArrayOutputStream out = new ByteArrayOutputStream();
        ByteArrayOutputStream err = new ByteArrayOutputStream();
        getKubernetesClient().pods().inNamespace(getNamespace()).withName(resource)
                .inContainer("solr")
                .readingInput(InputStream.nullInputStream())
                .writingOutput(out)
                .writingError(err)
                .usingListener(listener)
                .exec("/bin/sh", "-c", "echo foo");
        listener.awaitUninterruptable();

My SimpleListener captures the code from the onClose() method, but that is always 1000, and looking at the code in ExecWebSocketListener, it seems to be something from the WebSocket client, not the exit code of the executed process. I would have expected ExecWatch to have a method to retrieve the code, but it doesn't.

[stefanbethke]

This is pretty much what I found in the example: https://github.com/fabric8io/kubernetes-client/blob/master/kubernetes-examples/src/main/java/io/fabric8/kubernetes/examples/ExecExample.java

[stefanbethke]

When I exec false, the flow remains the same; it seems onFailure is called only when the exec fails, not when the command starts and exits with a non-zero exit code (which is fine, btw, just I'd like to get the exit code...)

[shawkins]

#3813 added ExecListener.onExit. And a recent change for 6.0 added ExecWatch.exitCode.

[stefanbethke]

Ah, thanks, I really need to upgrade to 6.

[shawkins]

There isn't a release date set yet unfortunately.

[manusa]

For completeness:

Version 6.x is out and there is an ExecWatch.exitCode() method that returns a CompletableFuture that returns an Integer with the exit code when completed.