Hi Giorgio,
Can you please attach vdsm.log from both hosts, and engine.log?
Try maybe moving both hosts to maintenance, "confirm host had been rebooted",
and activate again. See if it helps.
----- Original Message -----
> From: "Giorgio Bersano" <giorgio.bers...@gmail.com>
> To: "users@ovirt.org" <Users@ovirt.org>
> Sent: Tuesday, March 4, 2014 12:34:49 PM
> Subject: [Users] Data Center Non Responsive / Contending
>
> Hi everyone,
> I'm asking for help again as testing my setup I put myself in a
> situation in which I can't get out.
>
> Layout: two hosts, an iSCSI storage, the engine installed as a
> "regular" KVM guest on another host (external to the oVirt setup). All
> CentOS 6.5, oVirt 3.4.0beta3.
> One DC ("Default"), one Cluster ("Default"), default storage type iSCSI.
> Moreover, ISO domain is another "external" KVM guest exposing an NFS
> share; Export Domain is in fact a VM in this Cluster.
>
> This is a preproduction setup.
> Yesterday all was running fine until I needed to do some hardware
> maintenance.
> So I decided to put the two hosts in maintenance from the webadmin
> then shutdown them in the usual way. Engine was left operational.
> Later i booted again one host, waited some time then tried to activate
> it (from the webadmin) without success. Even switching on the second
> host didn't change anything.
> Now the Data Center status toggles between "Contending" and "Non Responsive".
>
> None of the hosts is SPM and if I choose "Select as SPM" in the
> webadmin the result is this popup:
> ----------
> Operation Canceled
> ----------
> Error while executing action: Cannot force select SPM: Storage Domain
> cannot be accessed.
> -Please check that at least one Host is operational and Data Center state is
> up.
> ----------
>
> The two hosts are operational but the DC isn't up (downpointing red
> arrow - "Non Responsive", hourglass - "Contending").
>
> Storage domains are in "Unknown" state and if I try to "Activate" the
> Master Data Domain its status becomes "Locked" and then it fails with
> these events:
> . Invalid status on Data Center Default. Setting status to Non Responsive
> . Failed to activate Storage Domain dt02clu6070 (Data Center Default) by
> admin
>
> Connectivity seems OK. iSCSI connectivity seems OK.
>
> I'm almost certain that if I had left one host active I would have had
> zero problems.
> But I also think shutting down the full system should not be a problem.
>
> In the end I restarted the ovirt-engine service without results (as
> expected).
>
> Any thought? Logs needed?
>
> TIA,
> Giorgio.
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