At 11pm GMT last night, we put our new Windows Server 2008 R2 cluster into production. We use Virtual Machine Manager (VMM) 2008 R2 to migrate the first machines from our W2008 cluster to the W2008 R2 cluster. We’re a hosting company so we had to do this at times that suited the customers and we had to do some other steps so their “sites” were not unresponsive.
The VMM moves ran pretty well. One of the machines failed to install the updated IC’s in the job so I reran the IC upgrade by itself. Once each machine moved over to the new cluster (on the CSV) I tested live migration. These were all web servers so the tests were simple – RDP into the machines via VPN, run a continuous ping from them to their respective default gateways and refresh websites from a browser while the migration was running. RDP didn’t have a disconnect or a hitch, ping didn’t miss a packet and none of the IE refreshes failed. All worked well.
The real test would be what would happen over night. As usual, the phone stayed close by. My real dread was seeing my inbox when I would come down in the morning. Would it be full of alerts from OpsMgr? We use OpsMgr 2007 R2 to monitor server hardware, virtualisation, operating systems, services, applications and to do some client side perspective monitoring of websites. One of the migrated customers is a web developer/hoster with a lot of sites. They’ve identified a decent number of critical sites for client perspective monitoring. Any problems at all over night and Outlook would be a scary proposition.
I might have only gotten to sleep at 02:00 but I was awake at 07:30. I came downstairs and powered up my work laptop. Outlook had … no new mails. Phew, what a relief! I was very confident after a rigorous test program but you never know when you make a big change. I fell good now about completing this migration, hopefully next week.