Rollback from "Pool partially upgraded ..."

[salvatore monforte]

Hi,

we have a pool of 4 XenServer v6.2 hosts. Today I trying to upgrade (using rolling pool upgrade) to 7.1

 

Unfortunately I discovered that the brocade-bfautil (CNA support) has been removed and there is apparently no way to connect to the HBA SRs where all productions servers are stored. 

 

The pool is currectly in a partially upgraded state: it is no possible to switch to a new master and start a VM before completing the upgrade. 

 

I've a backup of the pool-state db before running the pool upgrade process.

 

The question is what is the correct sequence of action to perform in order to revert the pool to the previous version ?

 

1) start from cd and restore the previous version than restore the pool db state ?

 

xe-patch list returns:

 

 xe patch-list 

uuid ( RO)                    : 591d0209-531e-4ed8-9ed2-98df2a1a445c

              name-label ( RO): RPU001

        name-description ( RO): Install Xapi plugin to allow host upgrade from HTTP, FTP or NFS install media.

                    size ( RO): 1004090

                   hosts (SRO): e44be627-35b2-4d8d-a9b4-d7892d4a10b9, fbeaf16d-1946-43b2-addd-8d9570426d62, b1d50741-8420-4aa6-bd95-d63c497b0bff, d305126f-265d-40fd-9b8d-873ae26a1ac1

    after-apply-guidance (SRO): 

 

 

would it be safe removing the patching state by issuing a xe patch-pool-clean before restoring the partially upgraded pool master and then proceed with the restore from cd and pool db state ?

 

 

Please help me ...

 

 

[salvatore monforte]

Hi,

for the record... I followed Alan suggestion to power-off the partial upgraded master (7.1) and issued the pool-emergency-transition-to-master and pool-recovery-slaves commands on one of the remaining servers (6.2).

 

It seems that the pool is recovered.

 

Now it time to recover the first server, but this shouldn't be a problem ...

 

Thanx again for you support.

[Alan Lantz]

Being in an inconsistent state is where you don't want to be. But if I understand you have a 4 host pool, the master is upgraded and the other 3 slaves are still 6.2. What I would probably do is hopefully master has no VM's on it so I could shut it down completely and elect one of the slaves as the new master. Then reinstall 6.2 on that failed master and reintroduce it back into the pool.

 

--Alan--

[beck chin]

If the master server is the only one in upgrade process.

You can reboot the master server with install cd, then select restore to the previous version.

When the master server restored and connected by center the upgrade process will stop.

[Alan Lantz]

If you use the rollback to previous version mention be sure and use the 7.1 installation CD/DVD. I've never tried reverting a 7.1 back to 6.2, but I don't see why it wouldn't work and I understand that if you have to new partitioning scheme it will revert back to the old layout. But its all theory for me, I've never done it.

 

--Alan--

[Alan Lantz]

awesome, good to hear you are on the mend.

 

--Alan--

[DIVINO PASSOS]

I need download again the RPU001 (591d0209-531e-4ed8-9ed2-98df2a1a445c ) for xenserver 6.2, someone know where i can get it ?

[Alan Lantz]

Ouch. XenServer 6.2 is so ancient. I'm not sure what to suggest. If you have an existing host with it installed 

it may have it somewhere in /var/patch.  You are in serious need of upgrade. I wish I could be of more help,

but I am almost all VMWare at this point.

 

--Alan--