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buildkite / agent-stack-k8s

Spin up an autoscaling stack of Buildkite Agents on Kubernetes
MIT License
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Canceled jobs in the UI #229

Open scalapaymdacrema opened 10 months ago

scalapaymdacrema commented 10 months ago

While running a lot of parallel jobs I have some jobs that doesn't start at all showing up in the UI as "Canceled". I managed to reduce the number of canceled jobs by:

  1. Increasing registry QPS on the kubelet
  2. Moving the docker image to a private registry
  3. Pulling the image at the kubernetes nodes startup ( managed by karpenter on EKS )

Sometimes I still get Canceled jobs in the UI and the pods logs this:

2023-12-14 11:30:14 DEBUG  Loaded config agent_version=3.52.0 agent_build=6806
2023-12-14 11:30:14 DEBUG  Enabled experiment "kubernetes-exec" agent_version=3.52.0 agent_build=6806
# Using experimental Kubernetes support
🚨 Error: Failed to start kubernetes client: error connecting to kubernetes runner: dial unix /workspace/buildkite.sock: connect: no such file or directory

Describing the job it says:

Events:
  Type     Reason            Age    From            Message
  ----     ------            ----   ----            -------
  Normal   SuccessfulCreate  7m53s  job-controller  Created pod: buildkite-018c6813-a298-4984-8707-ad9a72dd306e-6mfjh
  Normal   SuccessfulDelete  3m28s  job-controller  Deleted pod: buildkite-018c6813-a298-4984-8707-ad9a72dd306e-6mfjh
  Warning  DeadlineExceeded  3m28s  job-controller  Job was active longer than specified deadline

I noticed that activeDeadlineSeconds is 1 and backoffLimit is 0. These settings should be configurable to allow the Pod to retry in case of image pull issues etc but I'm not sure if it's relevant for this problem.

DrJosh9000 commented 10 months ago

Thanks for this @scalapaymdacrema! We'll look into making those configurable.