[Engine-devel] ovirt engine and node cannot work when IP address changed

[Tim Hildred]

> In the popup window of adding a new host, I am required to input the name as
> well as address, name is the hostname includes domain name, address is the
> IP address of the host.

Name is just arbitrary value, so you can call it "Host1" for example. 

In the "Address field", you can put either an IP, or a FQDN. If you have DNS in your environment, it may be a good idea to use the FQDN instead of the IP address in the "Address" field. That way, you can just update your DNS with the new IP address of your host, and not have to worry about updating it in the engine. 

In any case, you can remove the hosts from the Hosts tab of the engine, and re-add them using the "New Host" button. You won't have to reinstall anything on the host side, the engine will take each host through all of the installations steps, which should be fast because all of the required packages are installed already. You'll need to put your hosts into maintenance mode before removing them. 
> 
> We can access engine web portal but storage is not work. As to nodes, the
> status is non-responsive. Any solution to fix this and recover our
> environment?

Sounds like the engine still works, and I guess you are accessing the web portal using its IP address. 

What are you trying to get working? 

Did you want to access your engine using something like engine.yournet.com? If so, you'll need some form of DNS for that as well. Like I said before, if you have DNS already, then you can just change the IP address that engine.yournet.com resolves to in your DNS. What did you answer when setup asked you to provide a FQDN for your engine (in /var/log/ovirt-engine/engine-setup-SETUPDATE if you can't remember) ?

If you don't have any DNS, then you won't be able to use hostnames to address your hosts and engine. In this case, DHCP is not the way to go. 

Tim Hildred, RHCE
Content Author II - Engineering Content Services, Red Hat, Inc.
Brisbane, Australia
Email: thildred at redhat.com
Internal: 8588287
Mobile: +61 4 666 25242
IRC: thildred

----- Original Message -----
> From: "Wei D Chen" <wei.d.chen at intel.com>
> To: "Tim Hildred" <thildred at redhat.com>
> Cc: engine-devel at ovirt.org
> Sent: Monday, May 6, 2013 1:06:21 PM
> Subject: RE: [Engine-devel] ovirt engine and node cannot work when IP address	changed
> 
> Thanks Tim.
> 
> In the popup window of adding a new host, I am required to input the name as
> well as address, name is the hostname includes domain name, address is the
> IP address of the host.
> 
> We can access engine web portal but storage is not work. As to nodes, the
> status is non-responsive. Any solution to fix this and recover our
> environment?
> 
> 
> Best Regards,
> Dave Chen
> 
> 
> > -----Original Message-----
> > From: Tim Hildred [mailto:thildred at redhat.com]
> > Sent: Monday, May 06, 2013 9:15 AM
> > To: Chen, Wei D
> > Cc: engine-devel at ovirt.org
> > Subject: Re: [Engine-devel] ovirt engine and node cannot work when IP
> > address
> > changed
> > 
> > > Our engine and node rebooted for some reason, IP address for these
> > > hosts has been changed as we configured IP address with DHCP, the
> > > result is engine and node cannot work anymore.
> > 
> > Does that mean you added the hosts using their IP addresses, and not by
> > FQDN?
> > 
> > And, a can you access the engine at all?
> > 
> > > Any way to let our ovirt environment work again without
> > > reinstallation, any feedback is great appreciated.
> > 
> > Tim Hildred, RHCE
> > Content Author II - Engineering Content Services, Red Hat, Inc.
> > Brisbane, Australia
> > Email: thildred at redhat.com
> > Internal: 8588287
> > Mobile: +61 4 666 25242
> > IRC: thildred
> > 
> > ----- Original Message -----
> > > From: "Wei D Chen" <wei.d.chen at intel.com>
> > > To: engine-devel at ovirt.org
> > > Sent: Sunday, May 5, 2013 9:55:46 PM
> > > Subject: [Engine-devel] ovirt engine and node cannot work when IP address
> > 	changed
> > >
> > > Hi,
> > >
> > 
> > >
> > > Best Regards,
> > > Dave Chen
> > >
> > >
> > > _______________________________________________
> > > Engine-devel mailing list
> > > Engine-devel at ovirt.org
> > > http://lists.ovirt.org/mailman/listinfo/engine-devel
> > >
>