Difference between revisions of "COLO - Coarse Grain Lock Stepping SLES"

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This page contaions detailed instractions on how to setup COLO on SLES11-SP3.
 
 
= Host installation =
 
 
On both primary and secondary hosts:
 
* Select "Xen Virtualization Host" when choosing host type.
 
* On package selection, please include build-essential packages like make, gcc and so on.
 
* After install the host OS, edit '/boot/grub/menu.lst', change the default booting option to Xen DOM0 kernel
 
* Uninstall xen-tools package:
 
<pre>yast2 --remove xen-tools</pre>
 
* Edit /etc/modprobe.d/unsupported-modules, add the following line:
 
<pre>allow_unsupported_modules 1</pre>
 
* Add the following package source by using yast2:
 
<pre>http://ftp5.gwdg.de/pub/opensuse/discontinued/distribution/11.3/repo/oss/suse/
 
http://occonnect.dk/repo/$RCE/SLE11-SDK-SP3-Pool/sle-11-x86_64</pre>
 
* Install git
 
<pre>yast2 --install git</pre>
 
* Download files that needed for next steps:
 
<pre>git clone https://github.com/wencongyang/colo-files</pre>
 
* Install RPMs under colo-files/libnl3
 
* compile and install act_mirred module:
 
<pre>#cd colo-files/act_mirred && make
 
#mkdir /lib/modules/3.0.76-0.11-xen/updates/
 
#cp act_mirred.ko /lib/modules/3.0.76-0.11-xen/updates/ && depmod</pre>
 
* Download and [[Compiling_Xen|compile Xen]]
 
<pre>Checkout xen-colo source
 
#git clone https://github.com/wencongyang/xen
 
#cd xen && git checkout colo-v4-noheartbeat
 
Compile
 
#./configure
 
#make dist-xen; make dist-tools
 
Patch qemu and rebuild xen-tools
 
#cd tools/qemu-xen-dir/
 
#git am /path-to/colo-files/patch_for_qemu/0001-Introduce-xen-load-devices-state.patch
 
#cd ../../; make dist-tools
 
Install xen and xen-tools
 
#make install-xen; make install-tools
 
#chkconfig xencommons on
 
#reboot
 
NOTE: There might be some missing dependance, the main missing packages are the following, please install these first:
 
flex,python-devel, gettext-tools, dev86, libuuid-devel, libopenssl-devel, libyajl-devel, glib2-devel, libpixman-1-0-devel</pre>
 
* Compile and install colo agent (only needed on primary host)
 
<pre>#git clone https://github.com/wencongyang/colo-agent
 
#git checkout experimental
 
#make
 
#cp *.ko /lib/modules/3.0.76-0.11-xen/updates/ && depmod</pre>
 
 
= Guest installation =
 
 
Note the following steps should be done on primary host.
 
* Needed settings in Guest config file:
 
<pre>xen_platform_pci=0</pre>
 
* Select 'Physical Machine' when choosing host type.
 
 
= Run COLO =
 
Note the following steps should be done on primary host.
 
* Copy the new installed guest image to secondary host. Note that the image should be put in the same directory as it's in primary host.
 
* Load essential kernel modules:
 
<pre>modprobe ifb numifbs=10
 
modprobe sch_colo
 
modprobe sch_colo_ipv4
 
modprobe sch_colo_arp
 
modprobe sch_colo_icmp
 
modprobe sch_colo_tcp
 
modprobe sch_colo_udp</pre>
 
* Modify the guest config file:
 
** disk
 
<pre>disk = [ 'format=raw,devtype=disk,access=w,vdev=hda,backendtype=tap,filter=colo,filter-params=192.168.3.1:9000,target=/root/images/hvm/hvm_nopv/hvm.img' ]</pre>
 
** nic
 
<pre>vif = [ 'mac=00:16:4f:00:00:11, bridge=br0, model=e1000, forwarddev=eth0' ]</pre>
 
* Start guest
 
* Run COLO
 
<pre>xl remus -c -u <domname> <secondary host IP></pre>
 
 
[[Category:High Availability]]
 
[[Category:Xen 4.5]]
 

Revision as of 03:02, 8 June 2015