Open Stack

I've created a heat stack and installed Openstack Train to test the Centos7->8 upgrade following the document here:

https://docs.openstack.org/kolla-ansible/train/user/centos8.html#migrating-from-centos-7-to-centos-8

I used the instructions here to successfully remove and replace control0 with a Centos8 box

https://docs.openstack.org/kolla-ansible/train/user/adding-and-removing-hosts.html#removing-existing-controllers

After this my RMQ admin page shows all 3 nodes up, including the new control0. The name of the cluster is rabbit at chrnc-void-testupgrade-control-0.dev.chtrse.com<mailto:rabbit at chrnc-void-testupgrade-control-0.dev.chtrse.com>

(rabbitmq)[root at chrnc-void-testupgrade-control-2 /]# rabbitmqctl cluster_status
Cluster status of node rabbit at chrnc-void-testupgrade-control-2 ...
[{nodes,[{disc,['rabbit at chrnc-void-testupgrade-control-0',
                'rabbit at chrnc-void-testupgrade-control-0-replace',
                'rabbit at chrnc-void-testupgrade-control-1',
                'rabbit at chrnc-void-testupgrade-control-2']}]},
{running_nodes,['rabbit at chrnc-void-testupgrade-control-0-replace',
                 'rabbit at chrnc-void-testupgrade-control-1',
                 'rabbit at chrnc-void-testupgrade-control-2']},
{cluster_name,<<"rabbit at chrnc-void-testupgrade-control-0.dev.chtrse.com">>},
{partitions,[]},
{alarms,[{'rabbit at chrnc-void-testupgrade-control-0-replace',[]},
          {'rabbit at chrnc-void-testupgrade-control-1',[]},
          {'rabbit at chrnc-void-testupgrade-control-2',[]}]}]

After that I create a new VM to verify that the cluster is still working, and then perform the same procedure on control1. When I shut down services on control1, the ansible playbook finishes successfully:

kolla-ansible -i ../multinode stop --yes-i-really-really-mean-it --limit control1
...
control1                   : ok=45   changed=22   unreachable=0    failed=0    skipped=105  rescued=0    ignored=0

After this my RMQ admin page stops responding. When I check RMQ on the new control0 and the existing control2, the container is still up but RMQ is not running:

(rabbitmq)[root at chrnc-void-testupgrade-control-0-replace /]# rabbitmqctl cluster_status
Error: this command requires the 'rabbit' app to be running on the target node. Start it with 'rabbitmqctl start_app'.

If I start it on control0 and control2, then the cluster seems normal and the admin page starts working again, and cluster status looks normal:

(rabbitmq)[root at chrnc-void-testupgrade-control-0-replace /]# rabbitmqctl cluster_status
Cluster status of node rabbit at chrnc-void-testupgrade-control-0-replace ...
[{nodes,[{disc,['rabbit at chrnc-void-testupgrade-control-0',
                'rabbit at chrnc-void-testupgrade-control-0-replace',
                'rabbit at chrnc-void-testupgrade-control-1',
                'rabbit at chrnc-void-testupgrade-control-2']}]},
{running_nodes,['rabbit at chrnc-void-testupgrade-control-2',
                 'rabbit at chrnc-void-testupgrade-control-0-replace']},
{cluster_name,<<"rabbit at chrnc-void-testupgrade-control-0.dev.chtrse.com">>},
{partitions,[]},
{alarms,[{'rabbit at chrnc-void-testupgrade-control-2',[]},
          {'rabbit at chrnc-void-testupgrade-control-0-replace',[]}]}]

But my hypervisors are down:

(openstack) [root at chrnc-void-testupgrade-build kolla-ansible]# ohll
+----+-------------------------------------------------+-----------------+--------------+-------+------------+-------+----------------+-----------+
| ID | Hypervisor Hostname                             | Hypervisor Type | Host IP      | State | vCPUs Used | vCPUs | Memory MB Used | Memory MB |
+----+-------------------------------------------------+-----------------+--------------+-------+------------+-------+----------------+-----------+
|  3 | chrnc-void-testupgrade-compute-2.dev.chtrse.com | QEMU            | 172.16.2.106 | down  |          5 |     8 |           2560 |     30719 |
|  6 | chrnc-void-testupgrade-compute-0.dev.chtrse.com | QEMU            | 172.16.2.31  | down  |          5 |     8 |           2560 |     30719 |
|  9 | chrnc-void-testupgrade-compute-1.dev.chtrse.com | QEMU            | 172.16.0.30  | down  |          5 |     8 |           2560 |     30719 |
+----+-------------------------------------------------+-----------------+--------------+-------+------------+-------+----------------+-----------+

When I look at the nova-compute.log on a compute node, I see RMQ failures every 10 seconds:

172.16.2.31 compute0
2021-03-30 03:07:54.893 7 ERROR oslo.messaging._drivers.impl_rabbit [req-70d69b45-c3a7-4fbc-b709-4d7d757e09e7 - - - - -] [aeb317a8-873f-49be-a2a0-c6d6e0891a3e] AMQP server on 172.16.1.132:5672 is unreachable: timed out. Trying again in 1 seconds.: timeout: timed out
2021-03-30 03:07:55.905 7 INFO oslo.messaging._drivers.impl_rabbit [req-70d69b45-c3a7-4fbc-b709-4d7d757e09e7 - - - - -] [aeb317a8-873f-49be-a2a0-c6d6e0891a3e] Reconnected to AMQP server on 172.16.1.132:5672 via [amqp] client with port 56422.
2021-03-30 03:08:05.915 7 ERROR oslo.messaging._drivers.impl_rabbit [req-70d69b45-c3a7-4fbc-b709-4d7d757e09e7 - - - - -] [aeb317a8-873f-49be-a2a0-c6d6e0891a3e] AMQP server on 172.16.1.132:5672 is unreachable: timed out. Trying again in 1 seconds.: timeout: timed out

In the RMQ logs I see this every 10 seconds:

172.16.1.132 control2
[root at chrnc-void-testupgrade-control-2 ~]# tail -f /var/log/kolla/rabbitmq/rabbit\@chrnc-void-testupgrade-control-2.log |grep 172.16.2.31
2021-03-30 03:07:54.895 [warning] <0.13247.35> closing AMQP connection <0.13247.35> (172.16.2.31:56420 -> 172.16.1.132:5672 - nova-compute:7:aeb317a8-873f-49be-a2a0-c6d6e0891a3e, vhost: '/', user: 'openstack'):
client unexpectedly closed TCP connection
2021-03-30 03:07:55.901 [info] <0.15288.35> accepting AMQP connection <0.15288.35> (172.16.2.31:56422 -> 172.16.1.132:5672)
2021-03-30 03:07:55.903 [info] <0.15288.35> Connection <0.15288.35> (172.16.2.31:56422 -> 172.16.1.132:5672) has a client-provided name: nova-compute:7:aeb317a8-873f-49be-a2a0-c6d6e0891a3e
2021-03-30 03:07:55.904 [info] <0.15288.35> connection <0.15288.35> (172.16.2.31:56422 -> 172.16.1.132:5672 - nova-compute:7:aeb317a8-873f-49be-a2a0-c6d6e0891a3e): user 'openstack' authenticated and granted access to vhost '/'
2021-03-30 03:08:05.916 [warning] <0.15288.35> closing AMQP connection <0.15288.35> (172.16.2.31:56422 -> 172.16.1.132:5672 - nova-compute:7:aeb317a8-873f-49be-a2a0-c6d6e0891a3e, vhost: '/', user: 'openstack'):

Why does RMQ fail when I shut down the 2nd controller after successfully replacing the first one?

I apologize for the nonsense below. I have not been able to stop it from being attached to my external emails.

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