XML-RPC Error and DNS lookup failed when adding new Server

bradk

I am seeing a weird problem when trying to add servers to create a new pool.

Current version: 5.74.2

I have a pool created and I go to "New>Server". Add the new host details/creds and click Connect. It connects fine.

Now, I go to the pool add hosts to pool and it adds the host fine. That is all well and good.

Now, I have another 40 hosts to add. So I go to New>Server and enter the details and click connect. And the next host connects fine.
Then, rather than going and adding the host to the pool I continue on adding new hosts. However this is where the error occurs. As I click connect on the second host a triangle pops up and the error is: Invalid XML-RPC message

It doesnt even think about it - it returns the error immediately.

At this point, I have the first host that worked and a second host that failed.
Now, I delete the hosts that failed. go to Home>Pools and select the pool. Add the host that worked to the pool and all is good. Go back to New>Server and attempt to add that host that failed again. It works!

So, essentially, the New>Server section is only allowing me to add one server at a time, then I must add it to a pool and then go back and add a new server - rinse and repeat. I cannot add multiple hosts at once.

syslog shows:

Sep 8 10:41:52 xoa xo-server[39123]: XML-RPC Error: Invalid XML-RPC message (response status 503)
Sep 8 10:41:52 xoa xo-server[39123]: DNS lookup failed

Now.. I added a host, and then while adding the second host(to force the failure) I did a tcpdump on port 53. There was no DNS request sent out as the server failed to be added and errored with XML-RPC Error in the GUI and syslog again reported the above 2 error lines.

I have confirmed the DNS server that is configured is responding correctly - but if its not sending out the DNS request then that point is moot.

I have restarted xo-server, rebooted Xen Orchestra. No joy.

Does anyone have any pointers?

Cheers,
Brad

Danp

@bradk said in XML-RPC Error and DNS lookup failed when adding new Server:

Current version: 5.74.2

That's really old. You should update and then retest.

P.S. You should only be adding the pool masters to XO. How many different pools do you have?

bradk

@Danp really old? Maybe I am not showng the correct thing..

08/09/2022, 12:35:30: Start updating...
08/09/2022, 12:35:31: latest channel selected
08/09/2022, 12:35:31: All up to date

Current version: 5.74.2

node: 16.14.2
npm: 8.12.1
xen-orchestra-upload-ova: 0.1.4
xo-cli-premium: 0.14.1
xo-server: 5.102.1
xo-server-audit-premium: 0.10.0
xo-server-auth-github-premium: 0.2.2
xo-server-auth-google-premium: 0.2.2
xo-server-auth-ldap-premium: 0.10.4
xo-server-auth-saml-premium: 0.10.0
xo-server-backup-reports-premium: 0.17.0
xo-server-load-balancer-premium: 0.7.0
xo-server-netbox-premium: 0.3.3
xo-server-netdata-premium: 0.2.0
xo-server-perf-alert-premium: 0.3.2
xo-server-sdn-controller-premium: 1.0.5
xo-server-telemetry: 0.5.0
xo-server-transport-email-premium: 0.6.0
xo-server-transport-icinga2-premium: 0.1.1
xo-server-transport-nagios-premium: 0.1.1
xo-server-transport-slack-premium: 0.0.0
xo-server-transport-xmpp-premium: 0.1.1
xo-server-usage-report-premium: 0.10.0
xo-server-web-hooks-premium: 0.3.0
xo-server-xoa: 0.15.0
xo-web-premium: 5.103.0
xoa-cli: 0.31.0
xoa-updater: 0.43.1

I have 3 pools. They are not fully populated with hosts yet - hence why I am adding the hosts in XO and then assigning the hosts to the pool. Is there a more preferred way?

bradk

We seem to have found the issue.

This occurs because we have a proxy configured under XOA>Updates>Proxy Settings. When we remove that proxy, everything is working as expected.

Danp

@bradk Sorry for the confusion about the version number.