[openstack-dev] [openstack-ansible] [nova] Compute node failing to come up in hypervisor list after first reboot

Andy McCrae andy.mccrae at gmail.com
Mon Mar 6 15:14:03 UTC 2017

Hey Lawrence,

The nc -z is checking that you can connect to the port, but the error
itself looks to be related to the handshake when using SSL certificates in

"getrandom() initialization failed. (_ssl.c:590)" being the important bit
there. You'll probably find more if you start searching around that area
rather than the connection failure itself.

On a side note - this sounds like it may well be a bug with SSL certs in
rabbitmq in OpenStack-Ansible, I'd love to get that fixed if that is the

Hope that helps though.


On 6 March 2017 at 15:38, Lawrence J. Albinson <lawrence at ljalbinson.com>

> I've been chasing a problems with a build for some days now and would
> greatly appreciate any pointers the community can offer.
> The build is built of three nodes (infra+storage+compute) each of which is
> a KVM virtual machine.
> After installation everything seems fine. However, after rebooting the
> compute node the hypervisor list reports it as being down.
> The /var/log/nova/nova-compute.log is filling up with messages of the form:
>      2017-03-06 14:13:11.209 4380 ERROR oslo.messaging._drivers.impl_rabbit
> [req-7fa52faa-c21f-4a1c-8413-fddad9e52c2e - - - - -]
> [fd4c494d-1ef5-4502-991f-521f0a8a2bc3] AMQP server on
> is unreachable: getrandom() initialization failed. (_ssl.c:590). Trying
> again in 32 seconds. Client port: None
> I can confirm that is in fact reachable from compute1.
> Furthermore,  'nc -z -v -w5 5671' reports:
>     Connection to 5671 port [tcp/amqps] succeeded!
> Any pointers would be greatly appreciated.
> Kind regards, Lawrence
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