Difference between revisions of "Setting up a xen server"

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i've configured and played with xen on laze.
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oh, have fun.
  
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== to set create the parent server (out of date?) ==
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== to create the parent server ==
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as long as you don't read the documentation(at least, i found it very confusing and intimidating), it's actually not much more difficult than vserver.
 
  
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apt-get install xen-linux-system-2.6.18-3-xen-vserver-686 xen-tools libc6-xen
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install the freegeek-xen-server which includes some custom hooks for xen at
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freegeek.
  
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(alternately, you could install xen-linux-system-2.6.18-3-xen-686, or xen-linux-system-2.6.18-3-xen-vserver-686)
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apt-get install freegeek-xen-server
  
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martin noticed that you likely will need to edit
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edit /etc/xen-tools/xen-tools.conf:
  
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  /etc/xen-tools/xen-tools.conf:
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  kernel = /boot/vmlinuz-xen
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initrd = /boot/initrd.img-xen
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debootstrap = 1
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lvm = vg
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dist = etch
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passwd = 1
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mirror = http://apt.freegeek.org:9999/debian/
  
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kernel = /boot/vmlinuz-2.6.18-3-xen-vserver-686
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modify /etc/xen/xend-config.sxp:
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initrd = /boot/initrd.img-2.6.18-3-xen-vserver-686
 
  
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to match the kernel you have installed
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(network-script freegeek-network-script)
  
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[http://bugs.debian.org/405223]
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;Controlling the amount of memory dom0 uses
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* In /boot/grub/menu.lst add to the line # xenhopt=dom0_mem=256M then run update-grub
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i've been unable to verify if this helps at all, but:
 
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[http://lists.xensource.com/archives/html/xen-users/2006-11/msg00034.html]
 
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echo 'hwcap 0 nosegneg' > /etc/ld.so.conf.d/libc6-xen.conf
 
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appears to not help at all, at least on laze.
 
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When it's all finished, review values in /etc/xen-tools/xen-tools.conf ???
 
  
 
== to create an instance on the parent server ==
 
== to create an instance on the parent server ==
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you create new xen instances with:
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Create new xen instances with:
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sudo xen-create-image --hostname NAME --debootstrap --mirror http://mirrors.kernel.org/debian --dist etch --ip IP_ADDRESS
 
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Prepare to wait awhile while this all installs. Kill your time by editing the appropriate dns files and the purpose file in the ass svn project, check your work, and then commit the changes. Then ssh into dns1 and:
 
  
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  cd /var/cache/bind
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  xen-create-image --hostname SERVERNAME --ip 192.168.?.? --netmask 255.255.255.0 --gateway 192.168.?.1
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svn update
 
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/etc/init.d/bind9 reload
 
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sudo /etc/init.d/bind9 reload
 
  
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Continue waiting for your install to happen. Go help out at the Front Desk or something.
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Make sure SERVERNAME and the chosen ip address don't exist already.
  
 
It will ask for a root password. Have one prepared and ready to go.
 
It will ask for a root password. Have one prepared and ready to go.
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Check to see that it is there.
 
Check to see that it is there.
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To have it start automatically:
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ln -s /etc/xen/NAME.cfg /etc/xen/auto/
  
 
To start the xen instance:
 
To start the xen instance:
  
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  xm create /etc/xen/NAME.cfg
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  xm create NAME.cfg
  
 
To list the running xen instances and how much resources they're using:
 
To list the running xen instances and how much resources they're using:
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  xm list
 
  xm list
  
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To get networking to work, i had to uncomment in /etc/xen/xend-config.sxp:
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To get to a login screen on the vm, either ssh in, or:
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(network-script network-bridge)
 
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and restart xend:
 
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invoke-rc.d xend restart
 
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reclaim memory for the host machine stolen by stopped xen instances:
 
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xm mem-set Domain-0 700
 
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(for 700MB of ram)
 
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to get to a login screen on the vm, either ssh in, or:
 
  
 
  xm console NAME
 
  xm console NAME
  
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there's some mechanism to start instances at boot time i haven't yet explored, but it doesn't sound difficult.
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To get out of the instance, the secret keystroke is ''Ctrl-]''.
  
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log into the xen instance (either with ssh or xm console), and ensure the
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freegeek-xen-instance package is installed:
  
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apt-get install freegeek-xen-instance
  
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[[Category:ASS]]
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[[Category:Technocrats]]

Latest revision as of 17:12, 28 January 2012

oh, have fun.

to create the parent server

install the freegeek-xen-server which includes some custom hooks for xen at freegeek. 

apt-get install freegeek-xen-server

edit /etc/xen-tools/xen-tools.conf: 

kernel = /boot/vmlinuz-xen
initrd = /boot/initrd.img-xen
debootstrap = 1
lvm = vg
dist = etch
passwd = 1
mirror = http://apt.freegeek.org:9999/debian/

modify /etc/xen/xend-config.sxp: 

(network-script freegeek-network-script)
Controlling the amount of memory dom0 uses
  • In /boot/grub/menu.lst add to the line # xenhopt=dom0_mem=256M then run update-grub

to create an instance on the parent server

Create new xen instances with: 

xen-create-image --hostname SERVERNAME --ip 192.168.?.? --netmask 255.255.255.0 --gateway 192.168.?.1

Make sure SERVERNAME and the chosen ip address don't exist already.

It will ask for a root password. Have one prepared and ready to go.

Your configuration file will be in: 

/etc/xen/NAME.cfg

Check to see that it is there.

To have it start automatically: 

ln -s /etc/xen/NAME.cfg /etc/xen/auto/

To start the xen instance: 

xm create NAME.cfg

To list the running xen instances and how much resources they're using: 

xm list

To get to a login screen on the vm, either ssh in, or: 

xm console NAME

To get out of the instance, the secret keystroke is Ctrl-].

log into the xen instance (either with ssh or xm console), and ensure the freegeek-xen-instance package is installed: 

apt-get install freegeek-xen-instance
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