libvirtd override

[admin0]

Currently, the file

/etc/libvirt/libvirtd.conf is # Ansible managed

However, there is no override present that allows an operator to make changes to this file.

A real need for this is to enable live migration without using shared storage. This will allow an operator to migrate instances off the compute node without downtime.

Currently the file defaults are:

# Ansible managed

listen_tls = 1
listen_tcp = 0
unix_sock_group = "libvirt"
unix_sock_ro_perms = "0777"
unix_sock_rw_perms = "0770"
auth_unix_ro = "none"
auth_unix_rw = "none"
auth_tcp = "sasl"

Changes needed for live migration

# Ansible managed

listen_tls = 0
listen_tcp = 1
unix_sock_group = "libvirt"
unix_sock_ro_perms = "0777"
unix_sock_rw_perms = "0770"
auth_unix_ro = "none"
auth_unix_rw = "none"
auth_tcp = "none"

+ libvirt to listen on 0.0.0.0

--
The current defaults can stay, or we can enable the new defaults so that live-migration works out of the box.

Or this can also be toggled via

enable_live_migrations = true/false [I double who doesn't want this feature]

Thanks,
Shashi

[Jean-Philippe Evrard (jean-philippe-evrard)]

https://github.com/openstack/openstack-ansible-os_nova/blob/master/templates/libvirtd.conf.j2#L9-L10
and
https://github.com/openstack/openstack-ansible-os_nova/blob/master/templates/libvirtd.conf.j2#L16

shows there are overrides possible.

We'll discuss in the triage about the live_migration.

[Jean-Philippe Evrard (jean-philippe-evrard)]

Please also see our bug triage conversation.