[Rdo-list] Concerning Rabbits

(In the spirit of "Concerning Hobbits") Ryan O'Hara and I have been investigating RabbitMQ as it pertains to RDO recently. There has been a lot of discussion on several disparate threads, so I wanted to try and capture it on the list for the benefit of everyone. Ryan has been working on getting RabbitMQ running in a multi-node HA configuration. I won't steal his thunder, and he can speak to it better than I can, so I'll defer to him on the details. As for me, I've been working on el7 support and bug squashing along the way. The first bug[1] causes the daemon to load incredibly slow, or outright fail by timing out. This is due to the SELinux policy disallowing name_bind on ports lower than 32768. RabbitMQ tries to name_bind to a port starting at 10000, and increments if it fails. So if you have SELinux in enforcing mode, you'll get 22768 AVC denials in the log before it finally starts. The second bug[2] causes the daemon to intermittently fail to start due to a race condition in the creation of the erlang cookie file. This happens only the first time the service starts. Really this is an Erlang bug, but there's a workaround for the RabbitMQ case. I've submitted patches for both issues. Until those get merged in, I've rebuilt[3] RabbitMQ for F20 which includes the fixes. Beyond bugs, I've also built out RabbitMQ and all the build/runtime dependencies for el7. I have a yum repo[4] on my fedorapeople page containing all the bits. This is all the stuff that is presently missing from EPEL7. In time, I would hope the maintainers build all this stuff, but for now it'll work for testing. You will also need the EPEL 7 Beta repository[5] enabled. As a side note, I built everything using mock with a local override repo on my workstation. I've not used copr before but it seems relevant to this sort of thing, so if it's any benefit I'll look to rebuilt the el7 stack there for easier consumption. Hopefully this helps get the discussion into one place, and provide a baseline for further investigation by everyone interested in RabbitMQ. John. --- [1] Is really two bugzillas, but the same bug: [1a] https://bugzilla.redhat.com/show_bug.cgi?id=998682 [1b] https://bugzilla.redhat.com/show_bug.cgi?id=1032595 [2] https://bugzilla.redhat.com/show_bug.cgi?id=1059913 [3] http://jeckersb.fedorapeople.org/rabbitmq-server-3.1.5-3.fc20.noarch.rpm [4] http://jeckersb.fedorapeople.org/rabbitmq-el7/ [5] http://dl.fedoraproject.org/pub/epel/beta/7/x86_64/