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More than 2 nodes don't connect

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ktanev

ktanev

More than 2 nodes don't connect

I’m still learning Elixir, Phoenix and Mnesia, so probably it is a newbie question.

What I am trying to achieve is running 3 nodes on different IPs and connect them. I am executing on three terminals
PORT=4001 iex --name n1@127.0.0.1 --cookie secret_cookie -S mix phx.server
PORT=4002 iex --name n2@127.0.0.5 --cookie secret_cookie -S mix phx.server
PORT=4003 iex --name n3@127.0.0.8 --cookie secret_cookie -S mix phx.server.

The problem is that the second and third node do not connect to each other and giving me a warning
[warn] global: :"n2@127.0.0.5" failed to connect to :"n3@127.0.0.8". Running Node.ping returns :pang on both, the second and third one.

I have tried running it on the same IPs and it works, so I suppose there should be something more to do in order for them to connect to each other.

6 comments
#node
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Marked As Solved

hauleth

hauleth

On macOS all other addresses in 127.0.0.0/8 are unbound and you need to manually bound them to the lo0.

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benwilson512

benwilson512

Author of Craft GraphQL APIs in Elixir with Absinthe

I’m on OS X so perhaps it’s an OS X thing? Regardless, the OP should make sure that the IPs they’re using are addressable in the general sense. If they are not, that’s probably the issue. If they are, then we know to look elsewhere for a solution to their problem.

5
Post #6
benwilson512

benwilson512

Author of Craft GraphQL APIs in Elixir with Absinthe

Unless regular ping 127.0.0.5 works and routes to your local computer, you probably want all of those nodes to be on 127.0.0.1.

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