How do change the hostname of a livebook runtime?

Elixir Framework Forums Livebook Forum
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I wanna connect to an elixir runtime running on a separate node with livebook, but I cannot get it to work. I can connect to the other node through an iex session just fine but not through livebook.

I want to change the hostname of the nodes spawned by livebook but I cannot figure out how to do that… any ideas?

Skärmavbild 2023-03-18 kl. 13.19.30
Skärmavbild 2023-03-18 kl. 13.19.301200×839 35.6 KB

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I figured it out… :slight_smile:

I’m running livebook like this iex -S mix phx.server in a checkout of the livebook repo.

If I give my livebook server node a name like this iex --name livebook@eve.local -S mix phx.server the spawned runtimes will copy that hostname instead and connections to my external node works.

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You can configure the various distributed node settings with environment variables set when starting Livebook. I use a small script to do it, which you can find here: Tiny helper script to start Livebook connected to production (fly.io) or development - #2 by zachallaun

I believe the LIVEBOOK_NODE, LIVEBOOK_DISTRIBUTION, and LIVEBOOK_DEFAULT_RUNTIME variables will be most relevant to you. If you’re connecting to a node via IPv6, you will also need the ERL_AFLAGS.