IP(v6) alias(es) support #911
Description
Author Name: Stefan Kooman (Stefan Kooman)
Original Redmine Issue: 3784, https://dev.opennebula.org/issues/3784
Original Date: 2015-04-30
This feature has been discussed before but somehow never made it to a feature request: http://lists.opennebula.org/pipermail/users-opennebula.org/2014-January/026313.html. The idea is to have the possibility to add IP(v6) alias(es) to a TEMPLATE and / or a running VM. This way it's possible to (still) have all addresses / leases managed by OpenNebula. Normally a "true" IP alias would get a subnet mask of "/32" (IPv4) or "/128" (IPv6). If the IP(v6) alias inherits the properties from the VNET / AR this subnet mask will not be correct. Ideally there would be an option to override the properties of the VNET / AR. To make this IP(v6) alias(es) work when "IP address hijack prevention" is active (openvswitch) a new OpenFlow rule needs to be added for every IP(v6) alias added (related issue #3181). If an alias would be added to a running VM a driver should be executed on the host the VM is running on to add this OpenFlow rule. Context scripts could be enhanced to automatically add the IP(v6) alias(es) (ip (-6) addr add ip/subnetmask dev interface). If it would be possible to override the mac-address in an AR reservation this could also solve the (virtual) ip-address / MAC (VRRP / CARP) problem.