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.

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

Filed under: Uncategorized by — aaron @ 7:59 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

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

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

Xen DomU: 4gb seg fixup, process

A common error on a Xen DomU (as well as Dom0) 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
mv /usr/lib/tls /usr/lib/tls.disabled
echo ‘hwcap 0 nosegneg’ > /etc/ld.so.conf.d/libc6-xen.conf
reboot

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

HyperVM: VM creation has failed. Reason: Could not download __path_program_ or no_template_and_could_not_download []

HyperVM with Xen Error when trying to rebuild a VDS, or when trying to setup a new VDS:

VM creation has failed. Reason: Could not download __path_program_

Or

no_template_and_could_not_download []

Solutions:

1.  Ensure firewall is not running on slave, or incoming and outgoing port 8889 is allowed.
2. Set the permissions to 644 to the template (which is creating the error message) on the master server in the /home/hypervm/xen/template directory.
3. Ensure that the FQDN (fully qualified domain name) for the HyperVM master server (Servers -> localhost -> Information) is resolving to the correct IP.

Filed under: Uncategorized by — aaron @ 10:12 pm

HyperVM/Xen nash-hotplug using 100% of resources (Debian)

Some of the default HyperVM templates have an issue with nash-hotplug taking a large amount of resources (usually 99%). If you are having this issue, a quick an easy way to fix this is add the following to /etc/rc.local on the guest VDS:

pkill -9 nash

This is a temporary fix, until a more permanent one is provided by Lxlabs/HyperVM. This problem is supposedly already fixed in CentOS 4, however seems to still appear in Debian 3. For debian, do the following:

Open up /etc/init.d/local and add:

#!/bin/bash
pkill -9 nash

Then run the following:

chmod 755 /etc/init.d/local
update-rc.d local start 98 2 3 4 5 .
mkdir /etc/rc.d/
ln -s /etc/init.d/local /etc/rc.d/rc.local

Filed under: Uncategorized by — aaron @ 5:10 pm

Lxadmin Documentation and Useful Info

Having recently starting offering Virtual Dedicated Servers, and offering Lxadmin for free on all our Virtual Dedicated Server plans – the following details may be useful:

What is Lxadmin?

“LxAdmin is the world’s lightest control panel, using lighttpd and djbdns and only consumes 9MB RSS and 15MB memory usage on bootup on the OpenVZ (or Xen) platform. Lxadmin allows you to run either lighttpd/apache or djbdns/bind and also provides graphical interface to switch between these programs on a live server, without losing any data. Lxadmin Enterprise can transparently move web/mail/dns from one server running apache to another running lighttpd, again transparently and without causing any downtime.”

Useful Links:

1. Login Url: http://demo.lxadmin.com:7778/

2. Default Login Details:
Username: admin
Password: admin

3. Lxadmin Documentation: http://doc.lxlabs.com/lxadmin/admin/

Lxadmin integrates with our VDS control panel, and you can easily access and manage your VDS along with Lxadmin.

Filed under: Uncategorized by — aaron @ 4:22 pm

Where are the Xen log files?

The Xen/Xend/xm log files can be found: /var/log/xen

Filed under: Uncategorized by — aaron @ 10:22 pm

error: xenconsole: Could not open tty `/dev/pts/2′: No such file or directory

Error: xenconsole: Could not open tty `/dev/pts/2′: No such file or directory

If you come across this error when using xm console, then you can do the following:

In that case, make sure that xenconsoled is running.

ps aux |grep xenconsoled

If is not running, just execute

xenconsoled

Now you should be able to login to the VPS using xm console.

What is xenconsoled? xenconsoled is the daemon which enables you to console into each virtual server on a Xen host.

Filed under: Uncategorized by — aaron @ 6:58 pm