Sebastian Mogilowskis Blog

Just another blog about administration, linux and other stuff


Xen FileSystem Performance Test

Testing XenServer filesystem performance on plain hardware and the difference between EXT and LVM. How To Change the Default Storage Repository to EXT3 Hardware IBM Blade HS21 2x Intel(R) Xeon(R) CPU E5540 @ 2.53GHz 16 GB RAM LSI SAS 1064 with 2 SAS Disc with Raid 1 Software XenServer 5.6 SP2 Virtual Machines Ubuntu VMs […]


Enable SNMP on Citrix XenServer 5.6

Open XenServer Console or open a SSH connection to your XenServer for this howto: 1. Firewall Settings Open “/etc/sysconfig/iptables” with “vi” editor and add the following line to allow SNMP connections: -A RH-Firewall-1-INPUT -m state –state NEW -m udp -p udp –dport 161 -j ACCEPT Restart iptables service: service iptables restart 2. Configurate SNMPD Edit […]

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Ubuntu Lucid on XenServer 5.6 FP1

Describes howto install Ubuntu Lucid 10.04 LTS (32-Bit or 64-Bit) on a Citrix XenServer 5.6 FP1 and convert the virtual machine into a template. Note: Click to enlarge a picture. 1. Create a new virtual machine Select template “Ubuntu Lucid Lynx 10.04 (64-bit)” and choose name and description for your virtual machine (or 32-Bit if […]

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Upgrade Debian Lenny to Squeeze on Citrix XenServer

1. Update your Lenny installation Make sure that your current Lenny is up-2-date. aptitude update aptitude upgrade 2. Change sources to Squeeze Open “/etc/apt/sources.list” and replace “Lenny” with “Squeeze” here is an example: # Debian Squeeze deb squeeze main deb-src squeeze main # Debian Squeeze Security deb squeeze/updates main 3. Upgrade your […]

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Adding an additional local storage to an existing XENServer

Add the new physical device “/dev/sdb” as second local storage to an existing Citrix XENServer installation: (Note: I use XENServer 5.6) xe sr-create content-type=”local SR” host-uuid=(uuid of your xenserver host) type=(ext or lvm) device-config:device=/dev/sdb shared=false name-label=”Second local storage” The command returns the UUID of your new storage repository (SR). Example: xe sr-create content-type=”local SR” host-uuid=d06d7c86-08af-4f87-9188-bd287daac20b […]