I was able to fix the connectivity issues between all 3 hosts. It turned out that I hadn't completely deleted the old vlan settings from the host. I re-ran "nmcli connection delete" on the old vlan. After that, I had to edit a network-scripts file and change/fix the bridge to use ifcfg-ovirtmgmt. After I did all that, the problematic host was accessible again. All 3 Gluster peers are now able to see each other and communicate over the management network.
>From the command line, I was then able to successfully run "hosted-engine
>--connect-storage" without errors. I was also able to then run "hosted-engine
>--vm-start".
Unfortunately, the engine itself is still unstable, and when I access the web
UI / oVirt Manager, it shows that all 3 hosts are inaccessible and down.
I don't understand how the web UI is operational at all if the engine thinks
that all 3 hosts are inaccessible. What's going on there?
Although the initial problem was my own doing (I changed the management vlan),
I'm deeply concerned with how unstable everything became - and has continued to
be- ever since I lost connectivity to the 1 host. I thought the point of all of
this was that things would (should) continue to work if 1 of the hosts went
away.
Anyway, at that point, all 3 hosts are able to communicate with each other over
the management network, but the engine still thinks that all 3 hosts are down,
and is unable to manage anything.
Any suggestions on how to proceed would be much appreciated.
Sent with ProtonMail Secure Email.
‐‐‐‐‐‐‐ Original Message ‐‐‐‐‐‐‐
On Wednesday, April 7, 2021 8:28 PM, David White <dmwhite...@protonmail.com>
wrote:
> I still haven't been able to resurrect the 1st host, so I've spent some time
> trying to get the hosted engine stable. I would welcome input on how to fix
> the problematic host so that it can be accessible again.
>
> As per my original email, this all started when I tried to change the
> management vlan. I honestly cannot remember what I did (if anything) to the
> actual hosts when this all started, but my troubleshooting steps today have
> been to try to fiddle with the vlan settings and
> /etc/sysconfig/network-scripts/ files on the problematic host to switch from
> the original vlan (1) to the new vlan (10).
>
> Until then, I'm troubleshooting why the hosted engine isn't really working,
> since the other two hosts are operational.
>
> The hosted engine is "running" -- I can access and navigate around the oVirt
> Manager.
> However, it appears that all of the storage domains are down, and all of the
> hosts are "NonOperational". I was, however, able to put two of the hosts into
> Maintenance Mode, including the problematic 1st host.
>
> This is what I see on the 2nd host:
>
> [root@cha2-storage network-scripts]# gluster peer status
> Number of Peers: 2
>
> Hostname: cha1-storage.mgt.example.com
> Uuid: 348de1f3-5efe-4e0c-b58e-9cf48071e8e1
> State: Peer in Cluster (Disconnected)
>
> Hostname: cha3-storage.mgt.example.com
> Uuid: 0563c3e8-237d-4409-a09a-ec51719b0da6
> State: Peer in Cluster (Connected)
>
> [root@cha2-storage network-scripts]# hosted-engine --vm-status
> The hosted engine configuration has not been retrieved from shared storage.
> Please ensure that ovirt-ha-agent is running and the storage server is
> reachable.
>
> [root@cha2-storage network-scripts]# hosted-engine --connect-storage
> Traceback (most recent call last):
> File "/usr/lib64/python3.6/runpy.py", line 193, in _run_module_as_main
> "__main__", mod_spec)
> File "/usr/lib64/python3.6/runpy.py", line 85, in _run_code
> exec(code, run_globals)
> File
> "/usr/lib/python3.6/site-packages/ovirt_hosted_engine_setup/connect_storage_server.py",
> line 30, in <module>
> timeout=ohostedcons.Const.STORAGE_SERVER_TIMEOUT,
> File
> "/usr/lib/python3.6/site-packages/ovirt_hosted_engine_ha/client/client.py",
> line 312, in connect_storage_server
> sserver.connect_storage_server(timeout=timeout)
> File
> "/usr/lib/python3.6/site-packages/ovirt_hosted_engine_ha/lib/storage_server.py",
> line 394, in connect_storage_server
> 'Connection to storage server failed'
> RuntimeError: Connection to storage server failed
>
> The ovirt-engine-ha service seems to be continuously trying to load /
> activate, but failing:
> [root@cha2-storage network-scripts]# systemctl status -l ovirt-ha-agent
> ● ovirt-ha-agent.service - oVirt Hosted Engine High Availability Monitoring
> Agent
> Loaded: loaded (/usr/lib/systemd/system/ovirt-ha-agent.service; enabled;
> vendor preset: disabled)
> Active: activating (auto-restart) (Result: exit-code) since Wed 2021-04-07
> 20:24:46 EDT; 60ms ago
> Process: 124306 ExecStart=/usr/share/ovirt-hosted-engine-ha/ovirt-ha-agent
> (code=exited, status=157)
> Main PID: 124306 (code=exited, status=157)
>
> Some recent entries in /var/log/ovirt-hosted-engine-ha/agent.log
> MainThread::ERROR::2021-04-07
> 20:22:59,115::agent::144::ovirt_hosted_engine_ha.agent.agent.Agent::(_run_agent)
> Trying to restart agent
> MainThread::INFO::2021-04-07
> 20:22:59,115::agent::89::ovirt_hosted_engine_ha.agent.agent.Agent::(run)
> Agent shutting down
> MainThread::INFO::2021-04-07
> 20:23:09,717::agent::67::ovirt_hosted_engine_ha.agent.agent.Agent::(run)
> ovirt-hosted-engine-ha agent 2.4.6 started
> MainThread::INFO::2021-04-07
> 20:23:09,742::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::2021-04-07
> 20:23:09,837::hosted_engine::548::ovirt_hosted_engine_ha.agent.hosted_engine.HostedEngine::(_initialize_broker)
> Initializing ha-broker connection
> MainThread::INFO::2021-04-07
> 20:23:09,838::brokerlink::82::ovirt_hosted_engine_ha.lib.brokerlink.BrokerLink::(start_monitor)
> Starting monitor network, options {'addr': '10.1.0.1', 'network_test':
> 'dns', 'tcp_t_address': '', 'tcp_t_port': ''}
> MainThread::ERROR::2021-04-07
> 20:23:09,839::hosted_engine::564::ovirt_hosted_engine_ha.agent.hosted_engine.HostedEngine::(_initialize_broker)
> Failed to start necessary monitors
> MainThread::ERROR::2021-04-07
> 20:23:09,842::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': '10.1.0.1', 'network_test': 'dns',
> 'tcp_t_address': '', 'tcp_t_port': ''}]
>
> MainThread::ERROR::2021-04-07
> 20:23:09,842::agent::144::ovirt_hosted_engine_ha.agent.agent.Agent::(_run_agent)
> Trying to restart agent
> MainThread::INFO::2021-04-07
> 20:23:09,842::agent::89::ovirt_hosted_engine_ha.agent.agent.Agent::(run)
> Agent shutting down
>
> Sent with ProtonMail Secure Email.
>
> ‐‐‐‐‐‐‐ Original Message ‐‐‐‐‐‐‐
> On Wednesday, April 7, 2021 5:36 PM, David White via Users <users@ovirt.org>
> wrote:
>
> > I'm working on setting up my environment prior to production, and have run
> > into an issue.
> >
> > I got most things configured, but due to a limitation on one of my
> > switches, I decided to change the management vlan that the hosts
> > communicate on. Over the course of changing that vlan, I wound up resetting
> > my router to default settings.
> >
> > I have the router operational again, and I also have 1 of my switches
> > operational.
> > Now, I'm trying to bring the oVirt cluster back online.
> > This is oVirt 4.5 running on RHEL 8.3.
> >
> > The old vlan is 1, and the new vlan is 10.
> >
> > Currently, hosts 2 & 3 are accessible over the new vlan, and can ping each
> > other.
> > I'm able to ssh to both hosts, and when I run "gluster peer status", I see
> > that they are connected to each other.
> >
> > However, host 1 is not accessible from anything. I can't ping it, and it
> > cannot get out.
> >
> > As part of my troubleshooting, I've done the following:
> > From the host console, I ran `nmcli connection delete` to delete the old
> > vlan (VLAN 1).
> > I moved the /etc/sysconfig/network-scripts/interface.1 file to
> > interface.10, and edited the file accordingly to make sure the vlan and
> > device settings are set to 10 instead of 1, and I rebooted the host.
> >
> > The engine seems to be running, but I don't understand why.
> > From each of the hosts that are working (host 2 and host 3), I ran
> > "hosted-engine --check-liveliness" and both hosts indicate that the engine
> > is NOT running.
> >
> > Yet the engine loads in a web browser, and I'm able to log into
> > /ovirt-engine/webadmin/.
> > The engine thinks that all 3 hosts is nonresponsive. See screenshot below:
> >
> > [Screenshot from 2021-04-07 17-33-48.png]
> >
> > What I'm really looking for help with is to get the first host back online.
> > Once it is healthy and gluster is healthy, I feel confident I can get the
> > engine operational again.
> >
> > What else should I look for on this host?
> >
> > Sent with ProtonMail Secure Email.
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