Support IPv6 in IP pool

[abaughGHW]

Requires #4520

Context

• XO origin: the sources
• Versions:
  • Node: v8.16.1
  • xo-web: 5.48.1
  • xo-server: 5.48.0

Expected behavior

Assign IPv6 addresses via XO's IP pool feature so that IPv6 addresses can be allocated to VMs and managed in XO.

Current behavior

When using an IPv6 address range it displays the message "Please match the requested format."
I tried using both IPv6 short and long form addresses.

Several things to consider:

1. IPv6 global uni-cast type address support similar to current IPv4 address support
2. IPv6 auto configuration link-local address support so that the network locking feature does not block link-local traffic (the alternative if this is too difficult to implement is to use static link-local addresses defined by IP pool and make user/admin manually configure link-local addresses in the VMs).
3. Assigning IPv6 and IPv4 addresses from IP pool to the same VM interface (should be possible already as multiple IPv4 addresses can be assigned to the same interface...haven't actually tested it though).

Link to forum discussion: https://xcp-ng.org/forum/topic/1931/ip-pool-for-ipv6/5

[julien-f]

Might be an UI issue.

[julien-f]

My bad, I don't think this is supported at all at the moment for IP pools.

[abaughGHW]

I did some testing and it is possible to set this via CLI using:
xe vif-param-add uuid="UUID of VIF" param-name=ipv6-allowed param-key="IPv6 IP"

Once this is set via CLI it does show in XO. See below image.

Without this set I was not able to utilize IPv6 within the VM. After setting the option IPv6 began to work. See below image(first ping command option param was not set on the second ping command param was set).

So network locking with ipv4-allowed allows the specified IPv4 address to work. If this option is set and ipv6-allowed is not set then the VM can only communicate via IPv4.

Network locking with ipv6-allowed allows the specified IPv6 address to work. If this option is set and ipv4-allowed is not set then the VM can only communicate via IPv6.

To enable a VM to communicate on both IPv4 and IPv6 both ipv4-allowed and ipv6-allowed is required.