Comments (6)
Yep I'll pull this through Serf and Consul - /cc @dadgar for Nomad.
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@sean- any thoughts on this one?
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This is the express reason why hashicorp/go-sockaddr
sorts its addresses before making an address selection. Jiggling the sort order of utils.go
's privateBlocks
is suboptimal, but pragmatic in a pinch (
Lines 25 to 34 in 9800c50
From a correctness perspective, there are a few possible solutions, some more correct than others, but all solutions involve the use of hashicorp/go-sockaddr
(mostly because that's the bestest hammer available, imnsho! 😁 ).
- Sort the addresses returned from the host by their mask length. Something like: https://github.com/hashicorp/go-sockaddr/blob/c403ce7245ed06f545550eb6b80e0f2b1bd7566f/ipaddrs_test.go#L163
- Expose a template that can be evaluated and use a sane default that filters out
127.0.0.1
or uses one of the template helper functions: https://github.com/hashicorp/go-sockaddr/blob/a99c57b5a5f48c51607e63089075fe7434fe219a/template/template.go#L29-L53 - Use
sockaddr.GetPrivateIP()
and remove most of the code inutils.go
: https://github.com/hashicorp/go-sockaddr/blob/a99c57b5a5f48c51607e63089075fe7434fe219a/ifaddr.go#L11-L31 . @slackpad, now that we've just cut a release of both Serf and Consul, I think now would be a good time to do this so any breakage can marinate inmaster
for a while.
@woodsaj , can you run the following few commands and see if they're correct for your environment:
$ go get -u github.com/hashicorp/go-sockaddr/cmd/sockaddr
$ sockaddr eval GetPrivateIP
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$ sockaddr eval GetPrivateIP
192.168.0.102
looks to work correctly. :)
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Ha!, excellent. Thank you for that point of validation.
@slackpad, your call now. :) I'm game for PRing this at some point unless you beat me to it. As far as impact, Consul already has a vendor dependency on go-sockaddr
so that's a no op there. As far as other public projects, Serf and Nomad will need love because there will be a new library dependency. It's not that high on my list to tackle atm, but I can squeeze it in if needed.... or I'll do it on the train this morning (#108).
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Should be fixed at this level by #108.
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