FSF France machines management - Cookbook: recipe #320, Howto clone a Ganeti node

recipe #320, HowTo: Howto clone a Ganeti node

Warning : during disc copy (~1.5TB) the "source" node will be offline !

• failover the vm of source node to avoid long downtime (failover ip if needed).
• reboot the source node in rescue mode
• reboot the new node in rescue mode
• use dd to sync disk from source to new node :

sourcenode:~# dd if=/dev/sda | ssh newnode "dd of=/dev/sda" sourcenode:~# dd if=/dev/sdb | ssh newnode "dd of=/dev/sdb"

• after dd are done, restart source node, and put the vm back on it (with dedicated failover ips).

• when both sync are done, on the new node :

fsck -f /dev/sda1 mkdir /mnt/sda mount /dev/sda1 /mnt/sda vi /mnt/sda/etc/network/interfaces #Update main IP / failover IP / local (lo:1) IP

openvpn

Then, be sure all failover IPs are available as z2-X1.pokersource.info :

• on new node :

chroot /mnt/sda hostname z2-X1.pokersource.info /usr/local/bin/buildconf.sh z2-X.host.gnt echo z2-X.host.gnt > /etc/hostname

• on ganeti master :

Ganeti config

Remove ganeti config :
#if still in chroot rm /var/lib/ganeti/*

Zebra & OSPF

cd /etc/quagga vi opsfd.conf #update z2-X name and 10.10.1.X IP vi zebra.conf #update z2-X name

Boot

• exit chroot
• umount /mnt/sda
• reboot on system

When you have rebooted, it still has some things to do :

LVM

Remove all existing lv :

newnode:~# lvs #For each lv : newnode:~# lvremove LV_NAME

Add the node

On ganeti master :

 

 

 

 

 

Audience and Context

Audience:
   All Project Members
Feature:
   Project Main Pages

(As there is at least one of the Audience/Feature/Action context information not set, this recipe will not show up in related recipes links)