Strahil Nikolov

On Wed, Jul 21, 2021 at 1:01, Valerio Luccio

<valerio.luccio@nyu.edu> wrote:

Hi list,

I have a hosted engine running on a CentOS 8. The engine and all the VM's are stored on a 4-node gluster. I had some issues with the gluster and then the hosted-engine stopped working (even though the virtualization dashboard showed 4 virtual machines running). I tried to "systemctl restart" the hosted-engine, but it failed. I try to reboot the server and the hosted-engine still will not come up. Note that the server has no issue mounting the gluster:

$ df
hydra1:/MRIData           390664407040 20530130012 370134277028   6% /rhev/data-center/mnt/glusterSD/hydra1:_MRIData
$ ls -l /rhev/data-center/mnt/glusterSD/hydra1\:_MRIData/6547dc22-b89e-4f14-8958-c9e8d27b29a4/
drwxr-xr-x.  2 vdsm kvm 4.0K Mar 29 12:24 dom_md
drwxr-xr-x.  2 vdsm kvm 4.0K Jul 20 17:47 ha_agent
drwxr-xr-x. 12 vdsm kvm 4.0K Apr  1 16:32 images
drwxr-xr-x.  4 vdsm kvm 4.0K Mar 29 12:24 master

Where "hydra1" is one of my gluster nodes and MRIData is the volume name.

Here is the relevant snippet from /var/log/ovirt-hosted-engine-ha/agent.log

MainThread::INFO::2021-07-20 17:29:07,584::agent::67::ovirt_hosted_engine_ha.agent.agent.Agent::(run) ovirt-hosted-engine-ha agent 2.4.6 started
MainThread::INFO::2021-07-20 17:29:07,594::hosted_engine::242::ovirt_hosted_engine_ha.agent.hosted_engine.HostedEngine::(_get_hostname) Certificate common name not found, using hostname to identify host
MainThread::INFO::2021-07-20 17:29:07,635::hosted_engine::548::ovirt_hosted_engine_ha.agent.hosted_engine.HostedEngine::(_initialize_broker) Initializing ha-broker connection
MainThread::INFO::2021-07-20 17:29:07,636::brokerlink::82::ovirt_hosted_engine_ha.lib.brokerlink.BrokerLink::(start_monitor) Starting monitor network, options {'addr': '192.168.39.65', 'network_test': 'dns', 'tcp_t_address': '', 'tcp_t_port': ''}
MainThread::ERROR::2021-07-20 17:29:07,636::hosted_engine::564::ovirt_hosted_engine_ha.agent.hosted_engine.HostedEngine::(_initialize_broker) Failed to start necessary monitors
MainThread::ERROR::2021-07-20 17:29:07,637::agent::143::ovirt_hosted_engine_ha.agent.agent.Agent::(_run_agent) Traceback (most recent call last):
  File "/usr/lib/python3.6/site-packages/ovirt_hosted_engine_ha/lib/brokerlink.py", line 85, in start_monitor
    response = self._proxy.start_monitor(type, options)
  File "/usr/lib64/python3.6/xmlrpc/client.py", line 1112, in __call__
    return self.__send(self.__name, args)
  File "/usr/lib64/python3.6/xmlrpc/client.py", line 1452, in __request
    verbose=self.__verbose
  File "/usr/lib64/python3.6/xmlrpc/client.py", line 1154, in request
    return self.single_request(host, handler, request_body, verbose)
  File "/usr/lib64/python3.6/xmlrpc/client.py", line 1166, in single_request
    http_conn = self.send_request(host, handler, request_body, verbose)
  File "/usr/lib64/python3.6/xmlrpc/client.py", line 1279, in send_request
    self.send_content(connection, request_body)
  File "/usr/lib64/python3.6/xmlrpc/client.py", line 1309, in send_content
    connection.endheaders(request_body)
  File "/usr/lib64/python3.6/http/client.py", line 1249, in endheaders
    self._send_output(message_body, encode_chunked=encode_chunked)
  File "/usr/lib64/python3.6/http/client.py", line 1036, in _send_output
    self.send(msg)
  File "/usr/lib64/python3.6/http/client.py", line 974, in send
    self.connect()
  File "/usr/lib/python3.6/site-packages/ovirt_hosted_engine_ha/lib/unixrpc.py", line 74, in connect
    self.sock.connect(base64.b16decode(self.host))
FileNotFoundError: [Errno 2] No such file or directory

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/usr/lib/python3.6/site-packages/ovirt_hosted_engine_ha/agent/agent.py", line 131, in _run_agent
    return action(he)
  File "/usr/lib/python3.6/site-packages/ovirt_hosted_engine_ha/agent/agent.py", line 55, in action_proper
    return he.start_monitoring()
  File "/usr/lib/python3.6/site-packages/ovirt_hosted_engine_ha/agent/hosted_engine.py", line 437, in start_monitoring
    self._initialize_broker()
  File "/usr/lib/python3.6/site-packages/ovirt_hosted_engine_ha/agent/hosted_engine.py", line 561, in _initialize_broker
    m.get('options', {}))
  File "/usr/lib/python3.6/site-packages/ovirt_hosted_engine_ha/lib/brokerlink.py", line 91, in start_monitor
    ).format(t=type, o=options, e=e)
ovirt_hosted_engine_ha.lib.exceptions.RequestError: brokerlink - failed to start monitor via ovirt-ha-broker: [Errno 2] No such file or directory, [monitor: 'network', options: {'addr': '192.168.39.65', 'network_test': 'dns', 'tcp_t_address': '', 'tcp_t_port': ''}]

MainThread::ERROR::2021-07-20 17:29:07,637::agent::144::ovirt_hosted_engine_ha.agent.agent.Agent::(_run_agent) Trying to restart agent
MainThread::INFO::2021-07-20 17:29:07,637::agent::89::ovirt_hosted_engine_ha.agent.agent.Agent::(run) Agent shutting down

I'm puzzled by that "Certificate common name not found", which I had not seen before. The fqdn of the hosted engine resolves fine on the server, so does the fqdn of the server itself. The ip address it seems to try to use for the network is that of one of the university's gateways.

Any ideas ? Any way to debug this further ?

Thanks in advance,

-- 
Valerio Luccio             (212) 998-8736
Center for Brain Imaging   4 Washington Place, Room 157
New York University        New York, NY 10003

    "In an open world, who needs windows or gates ?"

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