Questions about "erl -epmd_start false"

[Shunichi Shinohara]

Maybe there are anyone interested, discussion continues in github PR:
  Document the -no_epmd option by JeromeDeBretagne · Pull Request #2945 ·
erlang/otp
  https://github.com/erlang/otp/pull/2945

Thanks for the PR, Jérôme!

-----
Shino

2020年12月21日(月) 10:11 Shunichi Shinohara <shino.shun@REDACTED>:

> Hi Jérôme,
>
> Thanks a lot for the useful information, it works like a charm!
>
> Thanks again,
> Shino
>
>
> 2020年12月18日(金) 17:50 Jérôme de Bretagne <jerome.debretagne@REDACTED>:
>
>> Hi Shino,
>>
>> This behavior is indeed expected.
>>
>> To avoir all registrations to epmd, you can pass the -no_epmd option
>> instead.
>>
>> It is mentioned in the following documentation:
>> https://erlang.org/doc/apps/erts/alt_dist.html
>>
>> Cheers,
>> Jérôme
>>
>> Le ven. 18 déc. 2020 à 03:40, Shunichi Shinohara <shino.shun@REDACTED>
>> a écrit :
>>
>>> Hi List,
>>>
>>> I try "epmdlessless" configuration described in:
>>>   Running Erlang Releases without EPMD on OTP 23.1+ · Erlware Blog
>>>   https://blog.erlware.org/epmdlessless/
>>>
>>> It works as described, thanks to people who contributed to the feature!
>>> However, it behaves in an unexpected way (to me) under epmd daemon
>>> running case.
>>>
>>> Expected behavior is the case without running epmd daemon. After
>>> launching a node as:
>>>
>>> % erl -sname foo -start_epmd false -erl_epmd_port 14693
>>> Erlang/OTP 23 [erts-11.1.4] [source] [64-bit] [smp:16:16] [ds:16:16:10]
>>> [async-threads:1]
>>>
>>> epmd daemon does *NOT* start, as expected:
>>>
>>> % epmd -names
>>> epmd: Cannot connect to local epmd
>>>
>>> On the other hand, after epmd daemon started as epmd -daemon,
>>> by executing the same erl command above, the node is registered to epmd
>>> daemon:
>>>
>>> % epmd -names
>>> epmd: up and running on port 4369 with data:
>>> name foo at port 14693
>>>
>>> The questions are:
>>> - Is this behavior expected (to other than me)?
>>> - Is there any option(s) of erl command to avoid registration to epmd?
>>>   # I guess it's possible by using
>>> https://github.com/tsloughter/epmdless
>>>
>>> Thanks,
>>> Shino
>>>
>>
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