yum upgrade error (openvz) on Lxlab’s HyperVM

When I try and do a yum upgrade on an HyperVM openvz node, I’m getting the following error:

Total download size: 220 M
Is this ok [y/N]: y
Downloading Packages:
http://download.lxlabs.com/download/update/centos-5/x86_64/t emp/x86_64/php-5.2.6-5.x86_64.rpm: [Errno 14] HTTP Error 404: Not Found
Trying other mirror.
http://download.lxlabs.com/download/update/centos-5/x86_64/t emp/x86_64/php-cli-5.2.6-5.x86_64.rpm: [Errno 14] HTTP Error 404: Not Found
Trying other mirror.
http://download.lxlabs.com/download/update/centos-5/x86_64/t emp/x86_64/php-common-5.2.6-5.x86_64.rpm: [Errno 14] HTTP Error 404: Not Found
Trying other mirror.

Error Downloading Packages:
php - 5.2.6-5.x86_64: failure: temp/x86_64/php-5.2.6-5.x86_64.rpm from lxlabsupdate: [Errno 256] No more mirrors to try.
php-cli - 5.2.6-5.x86_64: failure: temp/x86_64/php-cli-5.2.6-5.x86_64.rpm from lxlabsupdate: [Errno 256] No more mirrors to try.
php-common - 5.2.6-5.x86_64: failure: temp/x86_64/php-common-5.2.6-5.x86_64.rpm from lxlabsupdate: [Errno 256] No more mirrors to try.

To fix this, you can run the following:

yum clean all

yum upgrade

Related posts

• CentOS 5 yum error: Error: None (0)
• Reset lxadmin password (0)
• Reset Default Lxadmin Password via commandline/backend (0)
• lxadmin Error: sh: vgdisplay: command not found (0)
• linux-utils: update-rc.d: /etc/init.d/hwclock.sh: file does not exist (0)

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

Reset Default Lxadmin Password via commandline/backend

Sometimes when you intially setup Lxadmin, you can have problems resetting it from default.  To get around this can you can do the following:

1. Login via SSH to your VPS.

2. Run:

cd /usr/local/lxlabs/lxadmin/httpdocs

3. Then run:

/usr/bin/lphp.exe  ../bin/common/resetpassword.php master <your-new-password>

Related posts

• Reset lxadmin password (0)
• lxadmin Error: sh: vgdisplay: command not found (0)
• yum upgrade error (openvz) on Lxlab’s HyperVM (0)
• lxadmin password not applying in HyperVM (0)
• Lxadmin Documentation and Useful Info (0)

Filed under: Uncategorized by — aaron @ 2:39 am

lxadmin Error: sh: vgdisplay: command not found

Lxadmin Error:

sh: vgdisplay: command not found

If you are receiving this, its probably due to the hostname being set to something which is causing a problem, so do the following to fix:

hostname temp.domain.com
cd /usr/local/lxlabs/lxadmin/httpdocs/
lphp.exe ../bin/update.php

Related posts

• Reset lxadmin password (0)
• Reset Default Lxadmin Password via commandline/backend (0)
• yum upgrade error (openvz) on Lxlab’s HyperVM (0)
• lxadmin password not applying in HyperVM (0)
• Lxadmin Documentation and Useful Info (0)

Filed under: Uncategorized by — aaron @ 2:07 am

Reset lxadmin password

To reset the LXADMIN password, do the following steps:

1. First you want to restart lxadmin service from the back end.

/etc/init.d/lxadmin restart

2. Now go to the password reset page, and give the new password. Click update all.

If LXADMIN is not restarted before changing the password, it won’t get reset.

Related posts

• Reset Default Lxadmin Password via commandline/backend (0)
• lxadmin Error: sh: vgdisplay: command not found (0)
• yum upgrade error (openvz) on Lxlab’s HyperVM (0)
• Xen: How to check if Intel VT is enabled? (0)
• Xen DomU: 4gb seg fixup, process (0)

Filed under: Uncategorized by — aaron @ 8:59 pm

Xen Bug: xen_net: Memory squeeze in netback driver (32bit PAE)

If you are receiving the following error in your logs while running a 32bit PAE Xen Kernel:

xen_net: Memory squeeze in netback driver

Then you need to do the following:

1. In your grub.conf (or other bootloader) set the Dom0 to a fixed size: dom0_mem=1024.

2. In /etc/xen/xend-config.sxp set dom0-min-mem to the same size as above.

3. Reboot

Basically what you are doing is ensuring that Dom0 will not be decreased in size, as when this happens it causes problems the the xen_net driver which can in turn cause network connectivity problems with your DomUs.

Related posts

• HyperVM: VM creation has failed. Reason: Could not download __path_program_ or no_template_and_could_not_download [] (0)
• Xen DomU: 4gb seg fixup, process (0)
• Where are the Xen log files? (0)
• Upgrading DomU Kernel HyperVM/Xen (0)
• HyperVM: Kernel image does not exist: /boot/hypervm-xen-vmlinuz (0)

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

Upgrading DomU Kernel HyperVM/Xen

First install both the Dom0 and DomU kernel by doing a yum upgrade.  Once you have done this, reboot the server into the new Dom0 kernel and run the following command (before you start each VPS on the server):

cd /usr/local/lxlabs/hypervm/httpdocs/; lphp.exe ../bin/misc/fixcentos5xen.php

Related posts

• Xen Bug: xen_net: Memory squeeze in netback driver (32bit PAE) (4)
• Where are the Xen log files? (0)
• HyperVM: Kernel image does not exist: /boot/hypervm-xen-vmlinuz (0)
• HyperVM/Xen nash-hotplug using 100% of resources (Debian) (0)
• error: xenconsole: Could not open tty `/dev/pts/2′: No such file or directory (0)

Filed under: Uncategorized by — aaron @ 9:42 pm

lxadmin password not applying in HyperVM

If you get the following error in lxadmin when running HyperVM run the the command “/script/upcp” , reboot the VPS and try once again

“lxadmin  Your password is now set as a generic password which constitutes a grave security threat. Please change it immediately by  clicking here.”

Related posts

• Reset lxadmin password (0)
• Reset Default Lxadmin Password via commandline/backend (0)
• lxadmin Error: sh: vgdisplay: command not found (0)
• Lxadmin Documentation and Useful Info (0)
• yum upgrade error (openvz) on Lxlab’s HyperVM (0)

Filed under: Uncategorized by — ijan @ 8:56 pm

Custom Kernel per VPS in HyperVM

To use a customer kernel per VPS in HyperVM, copy (or link) the kernel to  /boot/hypervm-xen-vmlinuz-vps.vm where vps is the name of the VPS.

Related posts

• XenServer VM/VPS Will Not Reboot/How to force a shutdown (0)
• Xen: Dom0 and DomU can ping, but no other network connectivity - checksum problems (3)
• Xen DomU: 4gb seg fixup, process (0)
• Xen Bug: xen_net: Memory squeeze in netback driver (32bit PAE) (4)
• Where are the Xen log files? (0)

Filed under: Uncategorized by — aaron @ 8:21 pm

HyperVM: cannot restore segment prot after reloc: Permission denied

Error:

Failed loading /usr/local/lxlabs/ext/lib/Zend/lib/Optimizer-2.5.7/php-5.2.x/ZendOptimizer.so:  /usr/local/lxlabs/ext/lib/Zend/lib/Optimizer-2.5.7/php-5.2.x/ZendOptimizer.so: cannot restore segment prot after reloc: Permission denied
Zend
2004072203214624464xù

Solution:

If you are receiving this error while installing HyperVM, then you need to disable selinux.  This can be done by changing it to disabled in /etc/selinux

Related posts

• yum upgrade error (openvz) on Lxlab’s HyperVM (0)
• Why don’t we use mod_python in a shared (cPanel) environment? (0)
• Where did netconfig go? (CentOS/RHEL) (0)
• What is xfs? (0)
• What is the pcscd? (0)

Filed under: Uncategorized by — aaron @ 1:53 am

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.

Related posts

• linux-utils: update-rc.d: /etc/init.d/hwclock.sh: file does not exist (0)
• HyperVM: Kernel image does not exist: /boot/hypervm-xen-vmlinuz (0)
• yum upgrade error (openvz) on Lxlab’s HyperVM (0)
• Xen: How to check if Intel VT is enabled? (0)
• Xen: Console Not working Ubuntu 7 (0)

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