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base repository: NixOS/nixpkgs
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head repository: NixOS/nixpkgs
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  • 3 commits
  • 3 files changed
  • 2 contributors

Commits on Jul 19, 2018

  1. erlang: Build with systemd support 

    That way 'epmd' can be started by systemd using socket
activation. This is important to have when there is more than one
Erlang system used on the same host.

Support for this exists since 17.0:
erlang/otp@b7c95ea

Configure flag was added in 17.1:
erlang/otp@12cd5e5
    @binarin
    Alexey Lebedeff authored and binarin committed Jul 19, 2018
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  2. epmd: Introduce erlang port mapper daemon service 

    Having socket-activated epmd means that there always be only a single
instance managed centrally. Because Erlang also starts it
automatically if not available, and in worst case scenario 'epmd' can
be started by some Erlang application running under systemd. And then
restarting this application unit will cause complete loss of names in
'epmd' (if other Erlang system are also installed on this host).

E.g. see at which lengths RabbitMQ goes to recover from such
situations:
https://github.com/rabbitmq/rabbitmq-server/blame/7741b37b1efa97ac9b17685cc626bd35ee52ca16/src/rabbit_epmd_monitor.erl#L36

Having the only one socket-activated epmd completely solves this
problem.
    @binarin
    Alexey Lebedeff authored and binarin committed Jul 19, 2018
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Commits on Sep 17, 2018

  1. Merge pull request #43812 from binarin/epmd-systemd-pr 

     epmd: Introduce erlang port mapper daemon service
    @peterhoeg
    peterhoeg committed Sep 17, 2018
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