537 matches found
XenServer Host become responsive In Reboot/Shutdown
XenServer hangs on reboot with following message in serial logs Sending all processes the TERM signal... Sending all processes the KILL signal... Saving random seed: Syncing hardware clock to system time Turning off swap: Unmounting pipe file systems: Unmounting file systems: Please stand by whil...
How to find the hotfix applied on XenServer ?
Get a list of hotfixapplied on XenServer and when it was applied on the Host both from XenCenter or from the command line...
How to troubleshoot / Useful command around openVswitch in XenServer
This article provides information about ovs and command that can be used to troubleshoot ovs related issues...
How to create a raw VDI on XenServer ?
Sometimes when performance is important over other functionalities like snapshot fast clone which are provided by the VHD layer, we need to create raw VDI...
Capturing a continuous network trace( tcpdump ) on XenServer without filling the dom0
In certain situation, we are not sure when will the issue be reproduced and need to keep the network capture running. If the capture is run directly, it may fill up the dom0 filesystem and can crash the XenServer Host...
How to find the disk associated to a VM from XenServer CLI
While troubleshooting storage issues, we might need to get the VM's disk and its associated Virtual block devices . This article will help to get the desired details from the VM...
Generated troubleshooting for NFS related issues on XenServer
This article will give you guidelines for troubleshooting NFS SR related issues on XenServer...
XenMotion Compatibility Requirements
When migrating a VM with XenMotion or Storage XenMotion, the new VM host must meet the followingcompatibility requirements in order for the migration to proceed: • XenServer Tools must be installed on each VM that you wish to migrate. • The target host must have the same or a more recent version ...
How to take a XenServer toolstack (XAPI) database dump and view it
XenServer stores the vital information related to objects such asVM, VIF, VDI, PBD in an XMLformat file under /var/xapi/state.db.Thisfile is synced between pool membersat regular intervals to maintain aconsistent view of the XenServer pool. We recommend that you back up this XAPIdatabase file. Th...
How to connect to a console of a Linux VM from XenServer Host Console
Sometimes it might be necessary to connect to the console of VM via command line when SSH and XenCenter console is not working. This article describe the process for it...
How to capture network trace for a XenServer VM while booting up ?
In order to troubleshoot issues related to TFTP or DHCP, we may need to capture network traces during initial VM bootup. As Virtual interface is not loaded during initial bootup phase of VM, we need to capture trace on the tap device...
Upgrading to Ubuntu 14.04, RHEL 7 and CentOS 7 Guests
Customers who wish to upgrade existing Linux guests to versions which now operate in HVM mode that is, RHEL7, CentOS 7, and Ubuntu 14.04 should perform an in-guest upgrade. At this point, the upgraded Guest will only run in PV mode - which is not supported and has known issues. Customers should r...
All paths in multipath are not visible in XenServer after a reboot
After a XenServer Host reboot, some of the paths are not visible when typing the command multipath -ll...
Measure storage performance on XenServer using dd ?
dd is a native linux command also available on XenServer that can be used to measure the performance of a block device like /dev/sda at a block level. We can use this command to troubleshoot storage performance issues within the Host as well as the guest while clubbing it with other tools like...
Error when trying to disable HA on XenServer
When trying to disable HA for the pool, we are getting the following error xe pool-ha-disableThe uuid you supplied was invalid.type: VDIuuid: 87ca6afc-b0ad-4e54-bb5e-313dddd77ea2...
vhd-util tool to inspect the VHD headers of a VHD
vhd-util is a native utility of a XenServer used to inspect the VHD headers of a VHD. This will be useful to inspect the parent child relationship in VHD files...
How to confirm the status of HBA inserted into XenServer Host
Inorder for Storage repositories like LVMOBHA to connect properly, first step is to confirm if the HBA are connected properly to the Host. This article will help in confirming that...
Error: "xenopsd internal error: Unix.Unix_error(Unix.ENODEV, "write", "") importing VM on XenServer
After exporting a VM into an xva format and trying to import the VM, VM import is successful, but when trying to start the VM, it fails with the following error in the /var/log/xensource.log xenopsd internal error: Unix.UnixerrorUnix.ENODEV, "write", ""...
How to Capture a Network Trace from a XenServer Physical Interface, Virtual Bridge, and VM Virtual Interface
This article describes how to capture a network trace from a XenServer physical interface, Virtual Bridge, and Virtual Machine Virtual Interface...