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known-issues.md

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Known Issues

This document summarizes known issues with existing Kubernetes releases.

Please consult this document before filing new bugs.

Release 1.0.1

  • exec liveness/readiness probes leak resources due to Docker exec leaking resources (#10659)
  • docker load sometimes hangs which causes the kube-apiserver not to start. Restarting the Docker daemon should fix the issue (#10868)
  • The kubelet on the master node doesn't register with the kube-apiserver so statistics aren't collected for master daemons (#10891)
  • Heapster and InfluxDB both leak memory (#10653)
  • Wrong node cpu/memory limit metrics from Heapster (kubernetes-retired/heapster#399)
  • Services that set type=LoadBalancer can not use port 10250 because of Google Compute Engine firewall limitations
  • Add-on services can not be created or deleted via kubectl or the Kubernetes API (#11435)
  • If a pod with a GCE PD is created and deleted in rapid succession, it may fail to attach/mount correctly leaving PD data inaccessible (or corrupted in the worst case). (http://issue.k8s.io/11231#issuecomment-122049113)
    • Suggested temporary work around: introduce a 1-2 minute delay between deleting and recreating a pod with a PD on the same node.
  • Explicit errors while detaching GCE PD could prevent PD from ever being detached (#11321)
  • GCE PDs may sometimes fail to attach (#11302)
  • If multiple Pods use the same RBD volume in read-write mode, it is possible data on the RBD volume could get corrupted. This problem has been found in environments where both apiserver and etcd rebooted and Pods were redistributed.
    • A workaround is to ensure there is no other Ceph client using the RBD volume before mapping RBD image in read-write mode. For example, rados -p poolname listwatchers image_name.rbd can list RBD clients that are mapping the image.

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