How do I capture a vmcore from a KVM or RHV guest?

Solution Verified - Updated -

Issue

  • How do I capture a vmcore from a KVM guest?
  • How do I capture a vmcore from a RHV guest?
  • Is there any special panic dump facility for KVM and RHV guests?
  • Can I use the guests vmcore to diagnose issues like:
    • vm was hung state
    • KVM host and guest servers are down

Environment

  • Red Hat Enterprise Linux 5
  • Red Hat Enterprise Linux 6
  • Red Hat Enterprise Linux 7
  • Red Hat Enterprise Virtualization all versions
  • Red Hat Virtualization all versions
  • Red Hat Openstack all versions

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