[ovirt-users] Change ovirtmgmt ip from dhcp to static in a

Tue Mar 20 22:08:49 UTC 2018

Is this a safe procedure? I mean i only have this host in my cluster, what will happen at the vm's that are assigned to the host?

Thanks again

________________________________
From: Michael Burman <mburman at redhat.com>
Sent: Tuesday, March 20, 2018 4:10 PM
To: zois roupas
Cc: Ales Musil; users
Subject: Re: [ovirt-users] Change ovirtmgmt ip from dhcp to static in a

Then you need to remove the host from engine, change the IP manually on the host, via ifcfg-file, restart network service and install the host again via the new IP address.

On Tue, Mar 20, 2018 at 2:50 PM, zois roupas <roupas_zois at hotmail.com<mailto:roupas_zois at hotmail.com>> wrote:

Hi again all,

 "Unless i miss understood you here, do you use a different IP address when switching to static or the same IP that you got from dhcp? if yes, then this is another flow.."

To answer your question Michael , i'm trying to configure a different ip outside of my dhcp pool. The dhcp ip is 10.0.0.245 from the range 10.0.0.245-10.0.0.250 and i want to configure the ip 10.0.0.9 as the hosts ip

"One thing to note if you are changing the IP to different one that was assigned by DHCP you should uncheck "Verify connectivity between Host and Engine""

Ales, i also tried to follow your advise and uncheck the "Verify connectivity between Host and Engine" as proposed. Again the same results, it keeps reverting to previous dhcp ip
I will extract the vdsm log and i'll get back to you, in the meanwhile this is the error that i see after the assignment of the static ip in the log

2018-03-20 14:16:57,576+0200 ERROR (monitor/38f4464) [storage.Monitor] Error checking domain 38f4464b-74b9-4468-891b-03cd65d72fec (monitor:424)
Traceback (most recent call last):
  File "/usr/lib/python2.7/site-packages/vdsm/storage/monitor.py", line 405, in _checkDomainStatus
    self.domain.selftest()
  File "/usr/lib/python2.7/site-packages/vdsm/storage/fileSD.py", line 688, in selftest
    self.oop.os.statvfs(self.domaindir)
  File "/usr/lib/python2.7/site-packages/vdsm/storage/outOfProcess.py", line 243, in statvfs
    return self._iop.statvfs(path)
  File "/usr/lib/python2.7/site-packages/ioprocess/__init__.py", line 488, in statvfs
    resdict = self._sendCommand("statvfs", {"path": path}, self.timeout)
  File "/usr/lib/python2.7/site-packages/ioprocess/__init__.py", line 455, in _sendCommand
    raise Timeout(os.strerror(errno.ETIMEDOUT))
Timeout: Connection timed out

Best Regards
Zois

________________________________
From: Ales Musil <amusil at redhat.com<mailto:amusil at redhat.com>>
Sent: Tuesday, March 20, 2018 11:28 AM
To: Michael Burman
Cc: zois roupas; users

Subject: Re: [ovirt-users] Change ovirtmgmt ip from dhcp to static in a

One thing to note if you are changing the IP to different one that was assigned by DHCP you should uncheck "Verify connectivity between Host and Engine". This makes sure that the engine won't lost connectivity and in case of switching IP it happens.

On Tue, Mar 20, 2018 at 10:15 AM, Michael Burman <mburman at redhat.com<mailto:mburman at redhat.com>> wrote:
Indeed very odd, this shouldn't  behave this way, just tested it my self and it is working as expected. Unless i miss understood you here, do you use a different IP address when switching to static or the same IP that you got from dhcp? if yes, then this is another flow..

Can you please share the vdsm version and vdsm log with us?

Edy, any idea what can cause this?

On Tue, Mar 20, 2018 at 11:10 AM, zois roupas <roupas_zois at hotmail.com<mailto:roupas_zois at hotmail.com>> wrote:

Hi Michael and thanks a lot for the time

Great step by step instructions but something strange is happening while trying to change to static ip. I tried to do the change while the host was in maintenance mode and in activate mode but again after some minutes the system reverts to the ip that dhcp is serving!

What am i missing here? Do you have any ideas?

Best Regards
Zois
________________________________
From: Michael Burman <mburman at redhat.com<mailto:mburman at redhat.com>>
Sent: Tuesday, March 20, 2018 8:46 AM
To: zois roupas
Cc: users at ovirt.org<mailto:users at ovirt.org>
Subject: Re: [ovirt-users] Change ovirtmgmt ip from dhcp to static in a

Hello Zois,

It pretty easy to do, via the webadmin UI , go to Hosts main tab > Choose host > go to 'Network Interfaces' sub tab > Press the 'Setup Host Networks' button > press the pencil icon on your management network > and  choose Static IP > press OK and OK to approve the operation.

- Note that in some cases, specially if this is a SPM host you will loose connectivity to host for few seconds and host may go to non-responsive state, on a non-SPM host usually this woks without any specific issues.

- If the spoken host is a SPM host, I recommend to set it first to maintenance mode, do the switch and then activate. For non-SPM host this will work fine as well when the host is UP.

Cheers)

On Mon, Mar 19, 2018 at 12:15 PM, zois roupas <roupas_zois at hotmail.com<mailto:roupas_zois at hotmail.com>> wrote:

Hello everyone

I've made a rookie mistake by installing ovirt 4.2 in centos 7 with dhcp instead of a static ip configuration. Both engine and host are in the same machine cause of limited resources and i was so happy that everything worked so well that i kept configuring and installing vm's ,adding local and nfs storage and setting up the backup!

As you understand i must change the configuration to static ip and i can't find any guide describing the correct procedure. Is there an official guide to change configuration without causing any trouble?

I've found this thread http://lists.ovirt.org/pipermail/users/2014-May/024432.html but this is for a hosted engine and doesn't help when both engine and host are in the same machine

Thanx in advance

Best Regards

Zois

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Michael Burman

Senior Quality engineer - rhv network - redhat israel

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