Re: [Rdo-list] Concerning Rabbits

On Tue, Feb 04, 2014 at 12:28:31PM -0500, John Eckersberg wrote: > (In the spirit of "Concerning Hobbits") Thanks for kicking off this thread. > 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. Right now I have a 3-node RabbitMQ cluster with mirrored queues. I also put haproxy in front of this cluster and pointed all relevant OpenStack services at the virtual IP address. This seems to work well so far. Details instructions coming soon. > 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. Awesome. > 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 and I will be putting all of this in a wiki page on the RDO website in the very near future. I'll send email to the list when it is ready to be reviewed. Ryan > 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/ > > _______________________________________________ > Rdo-list mailing list > Rdo-list(a)redhat.com > https://www.redhat.com/mailman/listinfo/rdo-list _______________________________________________ Rdo-list mailing list Rdo-list(a)redhat.com https://www.redhat.com/mailman/listinfo/rdo-list