Tag: xen

xenserver 7.0 based on centos 7.2

https://docs.citrix.com/content/dam/docs/en-us/xenserver/xenserver-7-0/downloads/xenserver-7-0-installation-guide.pdf states: 

 The Control Domain: Also known as 'Domain0', or 'dom0', the Control Domain is a secure, privileged Linux VM (based on a CentOS 7.2 distribution) that runs the XenServer management toolstack. Besides providing XenServer management functions, the Control Domain also runs the driver stack that provides user created Virtual Machines (VMs) access to physical devices.

apply xen server patches in bulk

download a bunch of the buggers


for file in XS*.zip;do foo=`basename -s .zip $file`; unzip $file; bar=`xe patch-upload file-name=${foo}.xsupdate`;xe patch-apply uuid=$bar host-uuid=YOUR_HOST_UUID;done

you’ll probably want to add an rm of the zip file and an rm of the xsupdate file (exercise for the reader)

This won’t work for XS70E002 and XS70E003 until you apply XS70E004 (read the release notes).

para – virtualize to install from iso

http://www.xenlens.com/boot-a-guest-vm-from-cd-or-dvd-in-xenserver/ copied for posterity

In order to boot from cd or dvd you need to change the guest virtualization type from HVM (fully virtualized) to PV (paravirtualized).

xe vm-param-set HVM-boot-policy="BIOS order" uuid=[uuid of your vm]

After you have booted from dvd, change back to fully virtualized mode:

xe vm-param-set HVM-boot-policy="" uuid=[uuid of your vm]

xen xcp xapi change from eth0 to eth1 (after you delete eth0 eth1 becomes eth0 orn reboot)

#get the uuid of the box you want to add the eth1 to
xe vm-list

#list the interfaces that are associated with that box
xe vif-list | grep

#get list of network-uuids to pick from (in my case there are only 2)
xe vif-list |grep network-uuid| sort -u

# make the eth1 interface
vif-create device=1 vm-uuid= network-uuid=

# plug in the eth1 interface (uuid from prior step)
xe vif-plug uuid=

# unplug the eth0 interface (uuid from step 2)
xe vif-unplug uuid=

#delete the eth0 interface (after a reboot your new eth1 will be eth0)
xe vif-destroy uuid=

xcp add disk

xe sr-list #gives you a list of sr’s from which to pick a sr-uuid

xe vdi-create sr-uuid= name-label= type=user virtual-size=
#the above vdi-create outputs a vdi-uuid

xe vm-list # gives you a list of vm’s from which to pick a vm-uuid

xe vbd-create vm-uuid= vdi-uuid= bootable=false mode=RW type=Disk device= #pick an unused device name (my box had “disks” up to xvdc so I used xvdd)
# the above vbd-create outputs the vbd’s uuid

xe vbd-plug uuid=
#your new devices should now be visible from your domU

grub2 help for kernel upgrade on Ubuntu 12.04 domU on XCP

I wouldn’t be posting if this wasn’t yet another corner case, where things don’t work as they should… I likely built my xcp-xapi box at a bad time for xcp-xapi and grub2, hopefully this helps others…

Situation: installing new virtual kernel on Ubuntu 12.04 domU kernel upgrade crashes royally:

Error: Starting VM – Using to parse /boot/grub/grub.cfg – WARNING:root:Unknown directive load_video – WARNING:root:Unknown directive terminal_output – WARNING:root:Unknown directive else – WARNING:root:Unknown directive else – WARNING:root:Unknown directive else – WARNING:root:Unknown directive else – WARNING:root:Unknown directive else – WARNING:root:Unknown directive export – WARNING:root:Unknown image directive recordfail – WARNING:root:Unknown image directive gfxmode – WARNING:root:Unknown image directive recordfail – WARNING:root:Unknown directive submenu – WARNING:root:Unknown image directive recordfail – WARNING:root:Unknown image directive gfxmode – WARNING:root:Unknown image directive recordfail – Traceback (most recent call last): – File “/usr/lib/xcp/lib/pygrub.xcp”, line 853, in – raise RuntimeError, “Unable to find partition containing kernel” – RuntimeError: Unable to find partition containing kernel

Background: Ubuntu 12.04 dom0 running xcp

Work around (http://blog.403labs.com/post/1546501840/paravirtulization-with-citrix-xenserver-5-5-and-ubuntu):

 xe vm-param-set uuid=<VM-UUID> PV-bootloader-args="--kernel=/boot/vmlinuz-3.2.0-29-virtual --ramdisk=/boot/initrd.img-3.2.0-29-virtual"
xe vm-param-set uuid=<VM-UUID> PV-args="root=UUID=<disk-UUID> ro -- console=hvc0"