997785 - Reconfigure of irc1.dmz.phx1.mozilla.com and migration to new ESX Cluster

Status: RESOLVED FIXED

(Infrastructure & Operations :: Virtualization, task)

Description

[Chris Knowles [:cknowles]]

We're moving all VM's out of the old HP based VC, and into the new UCS based VC.  

All VMs successfully made this transition, with the exception of irc1.dmz.phx1.mozilla.com, which due to some configuration oddities needs to have its network redone in vmware.  This will result in a few seconds of network disconnect, which will likely cause IRC interruptions.  

We're aiming to start this work at 7AM Eastern on Friday 4/18/2014 - as promptly as possible.

Comment 1

[Chris Knowles [:cknowles]]

Alright, that went better than anyone expected.

irc1.dmz.phx1.mozilla.com is now using eth1 instead of eth0, and has been migrated to the new cluster.  

As stated elsewhere, there was no noticeable impact, irc seems to have weathered the process very well.

Here's the process we followed - 

* backup ifcfg-eth0
* copy ifcfg-eth0 -> ifcfg-eth1 - changing the device to eth1, and getting ready to change the mac address.
* remove ifcfg-eth0
* Add a new network card to the VM in the same vlan, noting the MAC
* update dhcp with that MAC for irc1's IP.
* updating ifcfg-eth1 with the new mac address
* Wait for DHCP to notice the change.
* service network restart
* ifconfig eth0 down.
* Huh.  That worked.