Verify IPv6 support

[tgross]

This came up in discussion in https://github.com/joyent/containerbuddy/pull/51, and we decided to split this problem out for later work.

This enhancement includes:

• support IPv6 addresses on interfaces that we're advertising to the discovery service
• support IPv6 connections to the discovery service
• anything else we can think of?

[misterbisson]

Not directly related, but IPv6 support in Triton is discussed in https://github.com/joyent/rfd/blob/master/rfd/0011/README.md

[bahamat]

+1

[justenwalker]

support IPv6 addresses on interfaces that we're advertising to the discovery service

Should be taken care of in #58

support IPv6 connections to the discovery service

The only discovery service is Consul so far. It takes a URI, which inherently has support for v6 either in the URI or via DNS. However, I haven't tested it.

anything else we can think of?

I didn't notice anything IPv4 related besides the IP discovery.

[tgross]

I think we're in good shape on this but we'll do a complete audit post-1.0 release.

[misterbisson]

I'm adding the help wanted tag here. If nothing else, we'd love to get more feedback from people about IPv6 environments that they're running in.