Restart Libvirt if it crashes

[OpenNebulaSupport]

Enhancement Request

Description

OpenNebula should be proactive in restarting libvirt when it crashes.

Use case

When a host reaches ERROR state, OpenNebula should offer the possibility of immediate libvirt restart by means of a hook.

Interface Changes

• New hook script (and added to install.sh)
• Add the snippet commented out in oned.conf.

Progress Status

• Branch created
• Code committed to development branch
• Testing - QA
• Documentation
• Release notes - resolved issues, compatibility, known issues
• Code committed to upstream release/hotfix branches
• Documentation committed to upstream release/hotfix branches

[vholer]

For now, we have added the libvirt reconfiguration not to use the PolicyKit, as this should be a common source of crashes on EL7. The change is part of OpenNebula's KVM node package.