Please backport rabbitmq-server 3.8.2-0ubuntu1 (main) from focal

[Eric Desrochers]

Please backport rabbitmq-server 3.8.2-0ubuntu1 (main) from focal to bionic.

Reason for the backport:
========================
3.6 is EOL since 31 May 2018, which only leave us with 3.8 as supported

For more details:
https://www.rabbitmq.com/versions.html

Note:
rabbitmq-server (3.8.2) depends on erlang (21.3 -> which is the minimum required) which depends on elixir (1.6.6)

None of theses depends are found in Bionic at the moment:
erlang | 1:20.2.2+dfsg-1ubuntu2 | bionic/universe | all
elixir | 1.3.3-2 | bionic/universe | all

A backport of the erlang and elixir will also be needed.

[Compatibility between Elixir and Erlang/OTP]
https://github.com/elixir-lang/elixir/blob/master/lib/elixir/pages/Compatibility%20and%20Deprecations.md

[RabbitMQ and Erlang/OTP Compatibility Matrix]
https://www.rabbitmq.com/which-erlang.html

Testing:
========
Mark off items in the checklist [X] as you test them, but please leave the checklist so that backporters can quickly evaluate the state of testing.

You can test-build the backport in your PPA with backportpackage:
$ backportpackage -u ppa:<lp username>/<ppa name> -s focal -d bionic rabbitmq-server

* bionic:
[-] Package builds without modification
Package requires erlang (21.3) and elixir (1.6.6) as build-dep[0]
Very minor changes related to debhelper (debhelper-compat vs debhelper).
Otherwise the builder try to default to compat 5[1]

[0]
----
Build status:
----
Dependency wait on lcy01-amd64-021 Retry this build

Missing build dependencies: elixir (>= 1.6.6), erlang-base (>= 1:21.3), erlang-crypto (>= 1:21.3), erlang-dev (>= 1:21.3), erlang-edoc (>= 1:21.3), erlang-eldap (>= 1:21.3), erlang-erl-docgen (>= 1:21.3), erlang-eunit (>= 1:21.3), erlang-inets (>= 1:21.3), erlang-mnesia (>= 1:21.3), erlang-nox (>= 1:21.3), erlang-os-mon (>= 1:21.3), erlang-parsetools (>= 1:21.3), erlang-public-key (>= 1:21.3), erlang-runtime-tools (>= 1:21.3), erlang-src (>= 1:21.3), erlang-ssl (>= 1:21.3), erlang-syntax-tools (>= 1:21.3), erlang-tools (>= 1:21.3), erlang-xmerl (>= 1:21.3)
----

[1]
----
debian/rules:67: warning: overriding recipe for target 'override_dh_auto_clean'
debian/rules:14: warning: ignoring old recipe for target 'override_dh_auto_clean'
dh clean --with python3,systemd
dh: Compatibility levels before 5 are no longer supported (level 1 requested)
debian/rules:11: recipe for target 'clean' failed
make: *** [clean] Error 255
dpkg-buildpackage: error: fakeroot debian/rules clean subprocess returned exit status 2
----

[X] rabbitmq-server installs cleanly and runs
# lsb_release -cs
bionic

# dpkg -l rabbitmq-server
ii rabbitmq-server 3.8.2-0ubuntu1+test20200220 all AMQP server written in Erlang

Reverse dependencies:
=====================
The following reverse-dependencies need to be tested against the new version of rabbitmq-server. For reverse-build-dependencies (-Indep), please test that the package still builds against the new rabbitmq-server. For reverse-dependencies, please test that the version of the package currently in the release still works with the new rabbitmq-server installed. Reverse- Recommends, Suggests, and Enhances don't need to be tested, and are listed for completeness-sake.

rabbitmq-server
---------------
* debci-collector
  [-] bionic (Reverse-Recommends)
* pybit-web
  [-] bionic (Reverse-Suggests)
* syslog-ng-mod-amqp
  [-] bionic (Reverse-Suggests)
* nagios-plugins-rabbitmq
  [-] bionic (Reverse-Suggests)
* neutron
  [] bionic (Reverse-Testsuite-Triggers)
* ceilometer
  [] bionic (Reverse-Testsuite-Triggers)
* aodh
  [] bionic (Reverse-Testsuite-Triggers)
* debci
  [] bionic (Reverse-Testsuite-Triggers)
  [X] bionic (Reverse-Build-Depends)
* nova
  [] bionic (Reverse-Testsuite-Triggers)
* ruby-bunny
  [X] bionic (Reverse-Build-Depends)

[David A. Desrosiers (setuid)]

We've extensively tested rabbitmq-server 3.8.2 from Eric's PPA on an existing, cleanly-built Bionic/Rocky OpenStack cluster and hammered it with multiple concurrent VM builds, deletes and live-migrations between compute hosts.

We also ran a full Rally suite against it with no errors or failures related to anything in the messaging workflow.

The customer pushing for this backport is satisfied with the testing they've done, and wants to push forward with the SRU into -backports, so they can consume it organically from their internal, daily aptly mirror ASAP, to mitigate some fatal issues they've seen with their 3.6.10 version on Rocky.

Thanks!

[Iain Lane (laney)]

I've uploaded erlang elixir-lang rabbitmq-server for bionic and rabbitmq-server for eoan.

Please test and report back!