[Wolves] Shooting yourself in the foot
andy.wootton at wyrley.demon.co.uk
Tue Mar 6 21:10:48 GMT 2007
I went to do a 'rolling upgrade' on a two-node cluster in a
master/standby configuration. The plan was to upgrade the slave, fail
over to the other node then upgrade the remaining machine. The nodes
were side by side with a console terminal on top of each. I checked
which was the live machine, checked the machine labels twice and ran the
shutdown. routine on the slave. Once it was down and I'd made some
necessary adjustments to the remaining node, I loaded the install media
and pressed the reboot button. The phone rang.
The left hand terminal was the console for the right hand system because
one of the power cables wasn't long enough. I'd rebooted the running system.
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