fabric8io/kubernetes-client

Java client for Kubernetes & OpenShift 3.x and 4.x

Rohan Kumar

@rohanKanojia

I think we should create a new issue to start this discussion again

Rohan Kumar

@rohanKanojia

the majority of CR/Ds one is going to encounter are not going to be written in java.

I think I see more and more people interested in writing operators in java these days

Red Hat is also investing some resources in java operator sdk

Jakub Cechacek

@jcechace

Yes but we should strive for general usability :)

@rohanKanojia
btw did you ever see this? Without touching my cluster the client starting spitting this at me

Caused by: io.fabric8.kubernetes.client.WatcherException: too old resource version: 48308901 (48321468)

5.2.1 client

Jakub Cechacek

@jcechace

Ok I supsect some micro release update in the cluster broke something. Updating to 5.5 fixed it

Rohan Kumar

@rohanKanojia

Hmm, yes. I have seen this

https://stackoverflow.com/a/61437982/2830116

If you use SharedIndexInformers, client would automatically handle 410

Jakub Cechacek

@jcechace

strangely in. my case this was happening across multiple executions so no watch should have persisted .. nevertheless update fixed and I want to thank you for removing InterruptedException from waits :)

Much cleaner

Rohan Kumar

@rohanKanojia

no need to thank me, @shawkins improved this

Jonathan Block

@blockjon

(newbie question) I'm learning Kotlin and when I use this kubernetes-client in a coroutine, my program hangs and I'm not sure why. I posted some details here fabric8io/kubernetes-client#3382 I wouldn't be surprised if the answer is obvious but this is my 3rd day of Kotlin so I'm currently stumped

Rohan Kumar

@rohanKanojia

is your kotlin coroutine doing something else?

I don't know kotlin but I think it might be okhttp

what happens when you provide your own okhttp client like this: https://github.com/fabric8io/kubernetes-client/blob/master/kubernetes-examples/src/main/java/io/fabric8/kubernetes/examples/ExecuteCommandOnPodExample.java#L44 ?

Jakub Cechacek

@jcechace

Migth want to wrap the call in runBlocking

Jakub Cechacek

@jcechace

@rohanKanojia is there a way to use the client for the equivalent of oc apply -f <folder or file>?

Rohan Kumar

@rohanKanojia

could you please try client.load(getClass().getResourceAsStream("/file.yml")).inNamespace("foo").createOrReplace()

this won't work if there are custom resources present in file

Jakub Cechacek

@jcechace

Will give it a try, it's for future work. I'm just planning some improvements for our project

will it work with multiple resources in the same file?

Rohan Kumar

@rohanKanojia

I think so

Jonathan Block

@blockjon

@rohanKanojia I was able to determine is that the coroutine hangs for exactly 5 minutes when I use this kubernetes-client library. Using a custom config and okHttpClient didnt seem to have an effect.

Jonathan Block

@blockjon

@rohanKanojia Mystery solved "Clear the connection pool with evictAll(). Note that the connection pool’s daemon thread may not exit immediately." - https://square.github.io/okhttp/4.x/okhttp/okhttp3/-ok-http-client/#shutdown-isnt-necessary

Rohan Kumar

@rohanKanojia

cool

Do you think we can add a FAQ regarding this to https://github.com/fabric8io/kubernetes-client/blob/master/doc/FAQ.md ?

Marc Nuri

@manusa

Starting release process for v5.7.0

Rohan Kumar

@rohanKanojia

:+1:

Marc Nuri

@manusa

https://twitter.com/fabric8io/status/1425787710439141383

vamseeds

@vamseeds

Hi Guys!
I see io.fabric8.kubernetes.client.dsl.internal.core.v1.PodTemplateOperationsImpl has been removed in v5.7.0 and I don't see any info relating to this removal in changelog .
is io.fabric8.kubernetes.client.dsl.internal.HasMetadataOperationsImpl replacement for above class ?

my previous usage (v5.4.0):

new PodTemplateOperationsImpl(
                k8sClient.getHttpClient(),
                k8sClient.getConfiguration());

current usage(v5.7.0):

new HasMetadataOperationsImpl<>(
                k8sClient.getHttpClient(),
                k8sClient.getConfiguration(), ResourceDefinitionContext.fromResourceType(PodTemplate.class), PodTemplate.class, PodTemplateList.class);

Kamal khanna

@KamalSinghKhanna

hey! new here

I am trying to run mvn clean install but it is showing the error

[ERROR] Failed to execute goal org.apache.maven.plugins:maven-surefire-plugin:3.0.0-M5:test (default-test) on project kubernetes-client: There are test failures.
[ERROR]
[ERROR] Please refer to /home/kamal/Desktop/Java-project/kubernetes-client/kubernetes-client/target/surefire-reports for the individual test results.
[ERROR] Please refer to dump files (if any exist) [date].dump, [date]-jvmRun[N].dump and [date].dumpstream.
[ERROR] -> [Help 1]
[ERROR]
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR]
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/MojoFailureException
[ERROR]
[ERROR] After correcting the problems, you can resume the build with the command
[ERROR] mvn <args> -rf :kubernetes-client

how to fix it?

Mohd Uzair

@MUzairS15

I think it's related to dependencies, could you tell more at which specific part build fail?

Try again with all needed dependencies, should work I think.

Rohan Kumar

@rohanKanojia

@KamalSinghKhanna : Were you able to resolve your issue?

which tests are failing specifically on your machine?

Marc Nuri

@manusa

Starting release process for v5.7.1

Rohan Kumar

@rohanKanojia

:+1:

Marc Nuri

@manusa

https://repo1.maven.org/maven2/io/fabric8/kubernetes-client/5.7.1/

Marc Nuri

@manusa

Starting release process for v5.7.2

Marc Nuri

@manusa

https://repo1.maven.org/maven2/io/fabric8/kubernetes-client/5.7.2/

Marc Nuri

@manusa

Starting release process for v5.7.3

Marc Nuri

@manusa

https://repo1.maven.org/maven2/io/fabric8/kubernetes-client/5.7.3/

G_Ivo

@GregoryIvo

Hi everyone! I'm getting this error: java.lang.NoClassDefFoundError: Could not initialize class io.fabric8.kubernetes.internal.KubernetesDeserializer when trying to connect to a kubeclient, with a uberjar built with mvn package shade:shade. any ideas? I have also included the optional bouncy castle lib, am using version 5.7.3 of the client and I only get there error when running out of my IDE. Thanks in advance, cheers!

Marc Nuri

@manusa

It appears that the client's kubernetes-model-core dependency jar package is not available in your shaded plugin. Review your shade configuration for package inclusion. Maybe you can use this as a reference: https://github.com/fabric8io/kubernetes-client/blob/1f3e85414a5932cd831e87a7825736bea2126252/uberjar/pom.xml#L241

G_Ivo

@GregoryIvo

Thank you Marc, will give this a shot and report back.

Rohan Kumar

@rohanKanojia

@gparimi1 : Hi, Could you please open an issue on Github regarding certificate handling? We need to actually check whether this actually got fixed or not.

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