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ernel:unregister_netdevice: waiting for eth0 to become free. Usage count = 1

· One min read

: https://access.redhat.com/solutions/3659011

SOLUTION VERIFIED - Updated October 13 2019 at 9:17 PM -

English

Issue​

  • We are trying to prototype kubernetes on top of RHEL and encounter the situation that the device seems to be frozen. There are repeated messages similar to:

Raw

[1331228.795391] unregister_netdevice: waiting for eth0 to become free. Usage count = 1
[1331238.871337] unregister_netdevice: waiting for eth0 to become free. Usage count = 1
[1331248.919329] unregister_netdevice: waiting for eth0 to become free. Usage count = 1
[1331258.964322] unregister_netdevice: waiting for eth0 to become free. Usage count = 1
  • This problem occurs when scaling down pods in kubernetes. A reboot of the node is required to rectify.
  • This has been seen after customers upgraded to a kernel with the fix for https://access.redhat.com/solutions/3105941 But after that the messages appear on ethX instead of lo.

Environment​

  • Red Hat Enterprise Linux 7

    • kernel-3.10.0-862.el7.x86_64
    • kernel-3.10.0-957.el7.x86_64

  • upstream Kubernetes

  • upstream docker

refer:

https://github.com/kubernetes/kubernetes/issues/70427

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