VMs created on OSP 13 and rt-kernel apparently hang.

Solution Verified - Updated -

Issue

  • VMs created on OSP 13 and rt-kernel apparently hang.

  • VM comes up fine; NOVA reports it as ACTIVE, and libvirt also says as Running but the VM hangs permanently without really running anything.

  • Means, there is no log that can be obtained from libvirt and VNC console will just hang with "VNC handshaking".

Environment

  • Observed in the following environment :

    • Red Hat OpenStack Platform 13
    • RT-kernels :
      • kernel-rt-3.10.0-957.3.1.rt56.914.el7.x86_64
      • kernel-rt-3.10.0-957.5.1.rt56.916.el7.x86_64
  • The issue has NOT been observed on a non-RT kernel.

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