Reconfiguring IP in XenServer via command line

If you need to reconfigure an IP address of XenServer via the command line.

xe pif-reconfigure-ip uuid= mode=static IP= gateway= netmask=

If using DHCP for assigning IPs, then,

#xe pif-reconfigure-ip mode=dhcp uuid=

If using STATIC then,

#xe pif-reconfigure-ip mode=static DNS= gateway=<IP of Gateway> IP= netmask= uuid=

If a server has multiple network cards you can use the following commands to assist in establishing the active link:

xe pif-plug uuid
xe pif-list

Tags: vds, xen, XenServer

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Filed under: Uncategorized by — aaron @ 5:52 pm

HyperVM: remote_authentication_failed / Can’t reset password in HyperVM

Error: HyperVM: remote_authentication_failed

If you are receiving this error, and HyperVM won’t reset the password on the slave server, you can manually do this on the slave server using the following commands:

# cd /usr/local/lxlabs/hypervm/httpdocs
# lphp.exe ../bin/common/resetpassword.php slave ‘password’

You then may need to force delete, and re-add the server with the new password.

Tags: hypervm, linux, xen

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Filed under: Uncategorized by — aaron @ 12:16 am

HyperVM: Kernel image does not exist: /boot/hypervm-xen-vmlinuz

Error: HyperVM: Kernel image does not exist: /boot/hypervm-xen-vmlinuz

To fix this error, login to the HyperVM slave and run the following:

# cd /usr/local/lxlabs/hypervm/httpdocs

# lphp.exe ../bin/misc/fixfc6xen.php

Tags: hypervm, linux, vds, xen

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Filed under: Uncategorized by — aaron @ 7:59 am

Xen: Console Not working Ubuntu 7

We came up with an issue with Xen with Ubuntu 7 would show output on the console, however froze part way through the

# aptitude install xen-tools

Add the following to /etc/sercuretty

xvc0

Create the file /etc/event.d/xvc0 containing:

# xvc0 - getty
#
# This service maintains a getty on xvc0 from the point the system is
# started until it is shut down again.

start on runlevel 2
start on runlevel 3

stop on runlevel 0
stop on runlevel 1
stop on runlevel 4
stop on runlevel 5
stop on runlevel 6

respawn
exec /sbin/getty 38400 xvc0

Reboot

Tags: debian, linux, ubuntu, xen

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Filed under: Uncategorized by — aaron @ 12:02 am

linux-utils: update-rc.d: /etc/init.d/hwclock.sh: file does not exist

When installing software on Ubuntu on a Xen Virtual Server I encountered this error:

update-rc.d: /etc/init.d/hwclock.sh: file does not exist
dpkg: error processing util-linux (–configure):
subprocess post-installation script returned error exit status 1
Errors were encountered while processing:
util-linux
E: Sub-process /usr/bin/dpkg returned an error code (1)
A package failed to install.  Trying to recover:
Setting up util-linux (2.12r-17ubuntu2.1) …
update-rc.d: /etc/init.d/hwclock.sh: file does not exist
dpkg: error processing util-linux (–configure):
subprocess post-installation script returned error exit status 1
Errors were encountered while processing:
util-linux

To fix this I did the following:

# touch /etc/init.d/hwclock.sh

Tags: hypervm, linux, ubuntu, xen

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Filed under: Uncategorized by — aaron @ 11:46 pm

Problems accessing Console on Xen virtual server

If you are having trouble accessing all virtual server’s (DomUs) via their consoles on a Xen server, you can easily resolve this by restarting xenconsoled. For example:

# xenconsoled –log=all –log-dir=/var/log/xen/console/

Tags: vds, virtual dedicated servers, xen

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Filed under: Uncategorized by — aaron @ 3:05 am

What is HVM?

HVM stands for Hardware Virtual Machine, and is usually used in reference to AMD’s and Intel’s Virtualization technology included in their new processors (Intel VT and AMD Pacifica).

The XenSource website has listed some of the processors which are compatible with this technology: http://wiki.xensource.com/xenwiki/HVM_Compatible_Processors

Tags: virtual dedicated servers, virtualization, xen

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Filed under: Uncategorized by — aaron @ 5:46 pm

HyperVM Error: sessionname_not_client []

If you are receive this error, you can check a number of ways to resolve it:

1. rm /usr/local/lxlabs/hypervm/session/*
2. Check / is not full on the server
3. chown lxlabs:lxlabs /usr/local/lxlabs/hypervm/session/

Tags: hypervm, virtual dedicated servers, xen

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Filed under: Uncategorized by — aaron @ 8:07 pm

yum errror: error: install: %pre scriptlet failed (2), skipping …

Problem: If you are getting an error something like this when using yum:

Total download size: 549 k
Is this ok [y/N]: y
Downloading Packages:
Running Transaction Test
Finished Transaction Test
Transaction Test Succeeded
Running Transaction
error: install: %pre scriptlet failed (2), skipping screen-4.0.3-1.el5

Solution: Disable selinux

Tags: server-administration, xen, yum

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Filed under: Uncategorized by — aaron @ 6:02 am

Xen DomU: 4gb seg fixup, process

A common error on a Xen DomU (guess host) in /var/log/messages once the guest/VDS has just been setup is:

4gb seg fixup, process

You can fix this easily by doing the following on the guest/VDS:

mv /lib/tls /lib/tls.disabled
reboot

Tags: hypervm, server-administration, xen

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Filed under: Uncategorized by — aaron @ 2:12 am