OpenNebula

This patch against 3.3.80 (and 3.4.0) adds NIC hot-plug. It allows to dynamically add (and remove) NIC / Network Leases to running VMs.

I've been working on this patch since I initially asked the One-users list back end of March [1].

This patch adds two new call to the OpenNebula API: one.vm.addnic and one.vm.rmnic. Both calls take 3 parameters:

IN String The session string.
IN Int The object ID (the VM ID)
IN String template of the NIC to add (or remove), e.g. "NIC=[NETWORK_ID=1, IP=10.10.10.10]".

The addnic call does:

1- Authorize the operation (requires MANAGE access to the VM)
2- Parse passed template into a NIC description
3- Obtain auth for the requested Virtual network
4- Assign new NIC to VM (mark the IP as used by the VM in the Virtual network pool)
5- Append new NIC to VM template and Update the VM template
6- Trigger a new ADDNIC VMM action (which in turn calls a new ADDNIC VNM script)

The rmnic call does:

1- Authorize the operation (requires MANAGE access to the VM)
2- Parse passed template into a NIC description
3- Search VM template for requested NIC to be removed
4- Release IP address back into the pool
5- Remove NIC from VM template and Update the VM template
6- Trigger a new RMNIC VMM action (which in turn calls a new RMNIC VNM script)

Unfortunately, I am unable to provide any of the ADDNIC or RMNIC scripts for the existing VNMs in OpenNebula. The scripts receive the modified VM template as a base64 encoded parameter (exactly like the others VNM scripts do). One has to parse the current VNM IP addresses and the IP addresses from the template and adjust the VNM accordingly. I'd be happy to provide Xen VNM scripts if someone can provide me access to a Xen hypervisor.

I'd love to see this patch merged into the next 3.5 release. Please let me know your feedbacks / recommendations to get this patch through.

Simon

[1] http://lists.opennebula.org/pipermail/users-opennebula.org/2012-March/008326.html

Hi Simon,

Thanks for your help. This is going to be scheduled for 4.0, that should be out before Christmas. We'll start working on this based on your previous patch (that is a wonderful help :). We'll post here our progress here and any question we may have. We'll probably start working on this in 3 - 4 weeks.

THANKS AGAIN for your great contribution!.

Ruben

Closing this and keep the work on #1691