XenServer with software RAID1 upgrade (6.1 to 6.2)

Warning: all operations are carried out only with the first two RAID partitions, the third partition is not changed

Due to the fact that the standard update is a XenServer installation of the new XenServer with virtual machines preservation, with the loss of all the changes that were made manually on the server (installed software, changing / adding settings through the console, etc.), the update is the new XenServer installation and connection of the old virtual machines.

Based on: http://support.citrix.com/article/CTX120962

1. Backup all VM, manually:

   xe vm-export vm=vm_name filename=backup_fiule_name compress=true
   ...
   xe pool-dump-database file-name=dump_name.dump
   

   or with XENBack

2. VM metadata export

   xe vm-export metadata=true --multiple filename=VMEXPORT

   Warning: store all files VMEXPORT… to another computer/data store/etc

3. Local storage info:

   xe sr-list name-label="Local Storage"

   should return something like the following:

   uuid ( RO) : 94093206-3d5e-c95c-9b7e-edbf55dbf3c2
    name-label ( RW): Local Storage
    name-description ( RW):
    host ( RO): vmhost-02
    type ( RO): lvm
    content-type ( RO): user
   

4. Install XenServer to the first drive, but without local storage
   Note: Do not configure a local repository, if during installation for the local repository is selected a disk, remove selection – the window “Virtual Machine Storage”

   Format the RAID root disk, mount it at /mnt and copy all to it

   mkfs.ext3 /dev/md0
   mount /dev/md0 /mnt
   cp -vxpR / /mnt
   

   Modify /mnt/etc/fstab and change root filesystem to /dev/md0. (Do NOT include the LABEL=)

   sed -i 's/LABEL=[a-zA-Z\-]*\s\(.*\)/\/dev\/md0 \1/' /mnt/etc/fstab

   Create a new boot image and uncompress it:

   mkdir /mnt/root/initrd-raid
   mkinitrd -v --fstab=/mnt/etc/fstab /mnt/root/initrd-raid/initrd-`uname -r`-raid.img `uname -r`
   cd /mnt/root/initrd-raid
   zcat initrd-`uname -r`-raid.img | cpio -i
   

   Edit ‘init’ and insert ‘raidautorun …’:

   sed -i 's/raidautorun \/dev\/md0/raidautorun \/dev\/md0\nraidautorun \/dev\/md1\nraidautorun \/dev\/md2/' init
   

   Copy the new ramdisk to the /mnt/boot folder and modify boot menu

   find . -print | cpio -o -Hnewc | gzip -c > /mnt/boot/initrd-`uname -r`-raid.img
   rm /mnt/boot/initrd-2.6-xen.img
   cd /mnt/boot/
   ln -s initrd-`uname -r`-raid.img initrd-2.6-xen.img
   

   Replace in /mnt/boot/extlinux.conf string “root=LABEL=root-…” to “root=/dev/md0″ in all menu entries

   sed -i 's/LABEL=[a-zA-Z\-]*/\/dev\/md0/' extlinux.conf

   Set up MBR for GPT on /dev/sdb

   cat /mnt/usr/share/syslinux/gptmbr.bin > /dev/sdb
   cd /mnt
   extlinux  --raid -i boot/
   

   Reboot (IMPORTANT: Set your server to boot from the SECONDARY HDD before booting!)
   When XenServer is up again, include /dev/sda in the array with the following commands:

   sgdisk --new=3:16779264:DISK_SIZE-34 /dev/sda
   sgdisk --attributes=1:set:2 /dev/sda
   sgdisk --typecode=1:fd00 /dev/sda
   sgdisk --typecode=2:fd00 /dev/sda
   sgdisk --typecode=3:fd00 /dev/sda
   mdadm -a /dev/md0 /dev/sda1
   mdadm -a /dev/md1 /dev/sda2
   mdadm -a /dev/md2 /dev/sda3
   

   The array needs to complete its synchronisation. That is gonna take a while. Follow its progress with:

   watch -n 1 cat /proc/mdstat

   When it’s done on all three arrays, copy the RAID setup to /etc/mdadm.conf

   mdadm --detail --scan >> /etc/mdadm.conf

5. After installed XenServer and all arrays synchronized, enable local storage

   xe sr-introduce uuid=UUID_from_section_3 type=type_from_section_3 name-label=”Local storage” content-type=user
   xe pbd-create sr-uuid=UUID_from_section_3 device-config:device=/dev/md2 host-uuid=[TAB]
   xe pbd-plug uuid=previous_returned_UUID
   

   If need, upgrade local storage in GUI: right mouse click on Local storage->Upgrade

   After enabling local storage, make it a default (via GUI)

6. Import the metadata for all the virtual machines files (files from section 2)

   xe vm-import metadata=true filename=VMEXPORT...