<@ULVA73B9P> how can I capture the logs from a kub...
# ask-marvin
p
@Marvin how can I capture the logs from a kubernetes job pod in prefect?
m
To capture logs from a Kubernetes Job pod in Prefect, you generally would need to ensure that your flow is configured to run on Kubernetes infrastructure. Here's how it works with Prefect: - KubernetesJob Infrastructure: Prefect's
KubernetesJob
infrastructure object allows you to execute flow runs in a Kubernetes Job. It is essential to understand that local storage is not supported, and you must configure remote storage. Additionally, a Prefect server or Prefect Cloud API endpoint must be set in your agent's configuration. - Requirements:
kubectl
must be available in your environment to manage and interact with Kubernetes resources. - Capturing Logs: While the documentation provided does not explicitly mention how to capture logs, in a Kubernetes context, you usually would use
kubectl logs <POD_NAME>
to retrieve logs from a pod. This command can be issued after your job has been submitted and while it's running or after completion, within the job retention period configured by
finished_job_ttl
. Most likely, you would use Kubernetes tools and commands to capture these logs rather than a Prefect-specific feature. If your flow logs are not showing up in the Kubernetes job logs, it could be due to how the logging is configured within your flow or Docker image. Remember to set any necessary environment variables using the
env
attribute of the
KubernetesJob
to ensure that your logging configuration is passed to the container correctly. If you are having trouble capturing logs or need more specific guidance, it would be best to specify your setup details, and I can assist further.
n
hi @Pooyan - are you using the helm chart to run your k8s worker? by default, it should stream logs as long as the bool field on your work pool is on
p
Hi Nate! It is a k8s worker but I am running another k8s job via
run_namespaced_job
off of a k8s job yaml file. so looking to get logs from another container basically. The logs I get from
run_namespaced_job
are the following format but not really the logs from container
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[Completed(message=None, type=COMPLETED, result=PersistedResult(type='reference', artifact_type='result', artifact_description='Result of type `dict` persisted to: `/root/.prefect/storage/e5317eff71814a1bab6af0fdc248b5c8`', serializer_type='pickle', storage_block_id=UUID('cb8cba71-7bdb-43b6-87a4-4a76ac598b72'), storage_key='e5317eff71814a1bab6af0fdc248b5c8'))]
n
ah man, i believe I'm the author of
run_namespaced_job
and it seems that this
dict
here
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'Result of type `dict` persisted to: `/root/.prefect/storage/e5317eff71814a1bab6af0fdc248b5c8`'
are the logs from your job invoked via
run_namespaced_job
🌟 1
so the return value of that flow run should be logs you want, although if you're accessing the results via the API you should setup result storage so that these results are saved somewhere besides
/root/.prefect/storage
on what i imagine is your ephemeral containerized runtime
p
Thanks, yeah that was my feeling. I will check