Thanks, Ask! amqplib versions after and including 1.0 enables SO_KEEPALIVE by default, > and Kombu versions after and including 1.2.1 depends on amqplib >= 1.0, > so maybe you should update your package dependencies?
devstack requied amqplib 0.6.1. I will research the best solution more detailed. 2011/12/29 Ask Solem <a...@rabbitmq.com> > > On 28 Dec 2011, at 14:38, Roman Sokolkov wrote: > > > Hi! > > > > I tried to make Rabbit HA for Openstack. > > > > My first e-mail was little innacurate. > > > > I use two nodes with active/active rabbits with mirrored queues. > Additionally I use Virtual IP. And all it managed by Pacemaker. Openstack > uses this remote rabbitmq via VIP. > > > > I hardly reboot node with VIP and VIP moves to other node. In this case, > connections on Openstack host staying forever in ESTABLISHED state(in > py-amqlib 0.6.1 no tcp keepalive options). > > Openstack think that all good and doesn't try to reconnect. But I if > correctly stop RabbitMQ, connections closed correctly and Openstack will > try to reconnect. > > > > I solve this issue by adding tcp_keepalive options in > py-amqlib(transport.py). > > amqplib versions after and including 1.0 enables SO_KEEPALIVE by default, > and Kombu versions after and including 1.2.1 depends on amqplib >= 1.0, > so maybe you should update your package dependencies? > > > > > > > > > It's very interesting what implemented in KAMQP. And how heartbeats work? > > Heartbeats is functionality part of the amqp 0-8 spec. > Heartbeats are enabled by specifying a heartbeat frequency, the broker > will then > send heartbeat frames at that suggested frequency, and the client will > also have > to send heartbeat frames back. If heartbeats are missed by either the > broker or client > the connection shall be disconnected. > > It's a very simple concept, but the problem with amqplib is that it is > non-threaded, > so it can be for the client to miss sending a heartbeat if it is blocking > elsewhere. This is not a problem when using eventlet/gevent (that is > unless the process is blocking, but that should never happen when using > greenlets). -- Regards, Roman Sokolkov
_______________________________________________ Mailing list: https://launchpad.net/~openstack Post to : openstack@lists.launchpad.net Unsubscribe : https://launchpad.net/~openstack More help : https://help.launchpad.net/ListHelp
