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I just wanted to add that we started seeing this in mid December. The last patch landed that was passing CentOS 8 CI was 14th of December.


04.02.2021, 12:40, "Jonathan Rosser" <jonathan.rosser at rd.bbc.co.uk>:
> I'm seeing very similar errors on patches we are trying to merge in openstack-ansible. Same sort of trouble with Centos breaking and Ubuntu working. References to logs with errors like yours are in the comments on this patch https://review.opendev.org/c/openstack/openstack-ansible-os_octavia/+/768514
>
> I was trying to find something specific we are doing wrong on Centos in openstack-ansible deployments but feels like there maybe some common Centos related factor here.
> On 04/02/2021 10:11, W Ch wrote:
>> Hi:
>>
>> Recently, we added a CI task[0] for octavia in the kolla project. and we tested octavia based on the ubuntu and centos systems.
>>
>> The ubuntu system worked as expected but Centos did not work.
>>
>> I tried to debug it and result is following:
>>
>> Octavia can not create a load balancer on centos8. because octavia-worker failed to plug a vip port on amphora vm.[1]
>>
>> 2021-01-31 08:20:12.065 22 ERROR octavia.compute.drivers.nova_driver [-] Error attaching network None with ip None and port 26a39187-e95a-4131-91e7-24289e777f36 to amphora (compute_id: a210ec88-b554-487f-a125-30b5c7473060) : novaclient.exceptions.ClientException: Unknown Error (HTTP 504)
>> 2021-01-31 08:20:12.066 22 ERROR octavia.network.drivers.neutron.allowed_address_pairs [-] Error plugging amphora (compute_id: a210ec88-b554-487f-a125-30b5c7473060) into port 26a39187-e95a-4131-91e7-24289e777f36.: octavia.common.exceptions.ComputeUnknownException: Unknown exception from the compute driver: Unknown Error (HTTP 504).
>> 2021-01-31 08:20:12.066 22 ERROR octavia.network.drivers.neutron.allowed_address_pairs Traceback (most recent call last):
>> 2021-01-31 08:20:12.066 22 ERROR octavia.network.drivers.neutron.allowed_address_pairs File "/var/lib/kolla/venv/lib/python3.6/site-packages/octavia/compute/drivers/nova_driver.py", line 318, in attach_network_or_port
>> 2021-01-31 08:20:12.066 22 ERROR octavia.network.drivers.neutron.allowed_address_pairs port_id=port_id)
>> 2021-01-31 08:20:12.066 22 ERROR octavia.network.drivers.neutron.allowed_address_pairs File "/var/lib/kolla/venv/lib/python3.6/site-packages/novaclient/api_versions.py", line 393, in substitution
>> 2021-01-31 08:20:12.066 22 ERROR octavia.network.drivers.neutron.allowed_address_pairs return methods[-1].func(obj, *args, **kwargs)
>> 2021-01-31 08:20:12.066 22 ERROR octavia.network.drivers.neutron.allowed_address_pairs File "/var/lib/kolla/venv/lib/python3.6/site-packages/novaclient/v2/servers.py", line 2063, in interface_attach
>> 2021-01-31 08:20:12.066 22 ERROR octavia.network.drivers.neutron.allowed_address_pairs obj_class=NetworkInterface)
>> 2021-01-31 08:20:12.066 22 ERROR octavia.network.drivers.neutron.allowed_address_pairs File "/var/lib/kolla/venv/lib/python3.6/site-packages/novaclient/base.py", line 363, in _create
>> 2021-01-31 08:20:12.066 22 ERROR octavia.network.drivers.neutron.allowed_address_pairs resp, body = self.api.client.post(url, body=body)
>> 2021-01-31 08:20:12.066 22 ERROR octavia.network.drivers.neutron.allowed_address_pairs File "/var/lib/kolla/venv/lib/python3.6/site-packages/keystoneauth1/adapter.py", line 401, in post
>> 2021-01-31 08:20:12.066 22 ERROR octavia.network.drivers.neutron.allowed_address_pairs return self.request(url, 'POST', **kwargs)
>> 2021-01-31 08:20:12.066 22 ERROR octavia.network.drivers.neutron.allowed_address_pairs File "/var/lib/kolla/venv/lib/python3.6/site-packages/novaclient/client.py", line 78, in request
>> 2021-01-31 08:20:12.066 22 ERROR octavia.network.drivers.neutron.allowed_address_pairs raise exceptions.from_response(resp, body, url, method)
>> 2021-01-31 08:20:12.066 22 ERROR octavia.network.drivers.neutron.allowed_address_pairs novaclient.exceptions.ClientException: Unknown Error (HTTP 504)
>>
>> Octavia-work called Neutron API to create a port. And called nova-api to attach the vip to amphora.
>>
>> Neutron created port successfully, but nova failed to attach the port to instance.[2]
>>
>> 2021-01-31 08:20:23.945 8 ERROR nova.virt.libvirt.driver [req-ab0e8d9b-664b-430f-8006-cad713b0c826 401ba22da5f8427fbda5fce24600041b 8ce8b97f710f43d7af2b8f9b1e0463c8 - default default] [instance: a210ec88-b554-487f-a125-30b5c7473060] attaching network adapter failed.: libvirt.libvirtError: Unable to read from monitor: Connection reset by peer
>> 2021-01-31 08:20:23.945 8 ERROR nova.virt.libvirt.driver [instance: a210ec88-b554-487f-a125-30b5c7473060] Traceback (most recent call last):
>> 2021-01-31 08:20:23.945 8 ERROR nova.virt.libvirt.driver [instance: a210ec88-b554-487f-a125-30b5c7473060] File "/var/lib/kolla/venv/lib/python3.6/site-packages/nova/virt/libvirt/driver.py", line 2149, in attach_interface
>> 2021-01-31 08:20:23.945 8 ERROR nova.virt.libvirt.driver [instance: a210ec88-b554-487f-a125-30b5c7473060] guest.attach_device(cfg, persistent=True, live=live)
>> 2021-01-31 08:20:23.945 8 ERROR nova.virt.libvirt.driver [instance: a210ec88-b554-487f-a125-30b5c7473060] File "/var/lib/kolla/venv/lib/python3.6/site-packages/nova/virt/libvirt/guest.py", line 304, in attach_device
>> 2021-01-31 08:20:23.945 8 ERROR nova.virt.libvirt.driver [instance: a210ec88-b554-487f-a125-30b5c7473060] self._domain.attachDeviceFlags(device_xml, flags=flags)
>> 2021-01-31 08:20:23.945 8 ERROR nova.virt.libvirt.driver [instance: a210ec88-b554-487f-a125-30b5c7473060] File "/var/lib/kolla/venv/lib/python3.6/site-packages/eventlet/tpool.py", line 190, in doit
>> 2021-01-31 08:20:23.945 8 ERROR nova.virt.libvirt.driver [instance: a210ec88-b554-487f-a125-30b5c7473060] result = proxy_call(self._autowrap, f, *args, **kwargs)
>> 2021-01-31 08:20:23.945 8 ERROR nova.virt.libvirt.driver [instance: a210ec88-b554-487f-a125-30b5c7473060] File "/var/lib/kolla/venv/lib/python3.6/site-packages/eventlet/tpool.py", line 148, in proxy_call
>> 2021-01-31 08:20:23.945 8 ERROR nova.virt.libvirt.driver [instance: a210ec88-b554-487f-a125-30b5c7473060] rv = execute(f, *args, **kwargs)
>> 2021-01-31 08:20:23.945 8 ERROR nova.virt.libvirt.driver [instance: a210ec88-b554-487f-a125-30b5c7473060] File "/var/lib/kolla/venv/lib/python3.6/site-packages/eventlet/tpool.py", line 129, in execute
>> 2021-01-31 08:20:23.945 8 ERROR nova.virt.libvirt.driver [instance: a210ec88-b554-487f-a125-30b5c7473060] six.reraise(c, e, tb)
>> 2021-01-31 08:20:23.945 8 ERROR nova.virt.libvirt.driver [instance: a210ec88-b554-487f-a125-30b5c7473060] File "/usr/lib/python3.6/site-packages/six.py", line 703, in reraise
>> 2021-01-31 08:20:23.945 8 ERROR nova.virt.libvirt.driver [instance: a210ec88-b554-487f-a125-30b5c7473060] raise value
>> 2021-01-31 08:20:23.945 8 ERROR nova.virt.libvirt.driver [instance: a210ec88-b554-487f-a125-30b5c7473060] File "/var/lib/kolla/venv/lib/python3.6/site-packages/eventlet/tpool.py", line 83, in tworker
>> 2021-01-31 08:20:23.945 8 ERROR nova.virt.libvirt.driver [instance: a210ec88-b554-487f-a125-30b5c7473060] rv = meth(*args, **kwargs)
>> 2021-01-31 08:20:23.945 8 ERROR nova.virt.libvirt.driver [instance: a210ec88-b554-487f-a125-30b5c7473060] File "/usr/lib64/python3.6/site-packages/libvirt.py", line 630, in attachDeviceFlags
>> 2021-01-31 08:20:23.945 8 ERROR nova.virt.libvirt.driver [instance: a210ec88-b554-487f-a125-30b5c7473060] if ret == -1: raise libvirtError ('virDomainAttachDeviceFlags() failed', dom=self)
>> 2021-01-31 08:20:23.945 8 ERROR nova.virt.libvirt.driver [instance: a210ec88-b554-487f-a125-30b5c7473060] libvirt.libvirtError: Unable to read from monitor: Connection reset by peer
>> 2021-01-31 08:20:23.945 8 ERROR nova.virt.libvirt.driver [instance: a210ec88-b554-487f-a125-30b5c7473060]
>>
>> Nova-compute called libvirt to attach the device. And libvirt also failed to attach the device[3]
>>
>> 2021-01-31 08:20:23.884+0000: 86663: error : qemuMonitorIORead:491 : Unable to read from monitor: Connection reset by peer
>> 2021-01-31 08:20:23.884+0000: 86663: debug : qemuMonitorIO:618 : Error on monitor Unable to read from monitor: Connection reset by peer
>> 2021-01-31 08:20:23.884+0000: 86663: info : virObjectRef:402 : OBJECT_REF: obj=0x7f004c00b610
>> 2021-01-31 08:20:23.884+0000: 86663: debug : qemuMonitorIO:649 : Triggering error callback
>> 2021-01-31 08:20:23.884+0000: 86663: debug : qemuProcessHandleMonitorError:346 : Received error on 0x7f004c0095b0 'instance-00000001'
>> 2021-01-31 08:20:23.884+0000: 64768: debug : qemuMonitorSend:958 : Send command resulted in error Unable to read from monitor: Connection reset by peer
>>
>> I also tried to use kolla/ubuntu-source-nova-libvirt instead of kolla/centos-source-nova-libvirt. and it worked as expected.
>>
>> I think the root cause is that libvirt failed to attach a network device. but i don't know how to resolve this problem.
>>
>> could anyone help me?
>>
>> Thanks
>>
>> Wuchunyang
>>
>> [0]: https://review.opendev.org/c/openstack/kolla-ansible/+/754285
>> [1]: https://zuul.opendev.org/t/openstack/build/e4b8c62c44a64b96bc287ba2ba2315f0/log/primary/logs/kolla/octavia/octavia-worker.txt#1116
>> [2]: https://zuul.opendev.org/t/openstack/build/e4b8c62c44a64b96bc287ba2ba2315f0/log/primary/logs/kolla/nova/nova-compute.txt#2546
>> [3]: https://zuul.opendev.org/t/openstack/build/e4b8c62c44a64b96bc287ba2ba2315f0/log/primary/logs/kolla/libvirt/libvirtd.txt#194472


-- 
Kind Regards,
Dmitriy Rabotyagov