Error in handleInterruptedCoalesceLeaf when trying to scan the Storage on XenServer

Error in XenCenter - SR failed to complete the operation Error in /var/log/SMlog -25840 2012-12-14 10:52:35.402274 lock: released /var/lock/sm/lvm-579fdc35-f120-398e-397e-b12179c9531c/83b6fcfd-e9ed-432b-b662-d8d28f9ccca525840 2012-12-14 10:52:35.402380 lock: closed...

XenServer Syslog Rotation and Tuning

Disk space on XenServer's root partition is almost at or is at capacity perdf -h There are numerous compressed "gz" files in /var/log/ from Syslog rotation...

How to attach USB drive as a local Storage on XenServer

To attach a USB drive as a local storage on XenServer Host...

How to reset root password of NetScaler SDX

This article describes how to reset the root password of NetScaler SDX running on XenServer. Note: If you are a XenServer user, do not refer to this article. Instead, see the XenServer documentation. Background For the XenServer component of a NetScaler SDX, a lost root password can be overwritte...

Error "The tools ISO must be ejected from all running VMs in the pool" While installing XenServer hotfix.

When attempting to install XenServer hotfix the following error message is displayed: Note that there are no ISO's attached to any of the VM's running in the pool. Also executed the 'xe vm-cd-eject --multiple' command to ensure this is the case: xe vm-cd-eject --multiple operation failed on...

Ovs-vswitchd daemon showing high CPU usage

XenServer 6.5 SP1 heavy IO traffic/ CPU utilization with open vswitch technology. Ovs-vswitchd daemon running on the XS was showing high CPU usage and performance tab shows heavy CPU usage...

XenServer 6.5 - VM IP configuration switches back to DHCP

XenServer 6.5 - VM IP configuration switches back to DHCP...

How to introduce a new SMB SR path to a already existing SR with same SR-UUID in xenserver

Sometimes we may need to change the IP of the SMB share where VHD files are stored. This article will help in changing the SR parameters without changing the UUID of the Storage repository...

Citrix XenServer Multiple Vulnerabilities (CTX216071)

The version of Citrix XenServer running on the remote host is missing a security hotfix. It is, therefore, affected by multiple vulnerabilities : - A flaw exists due to improper handling of pagetable walks that contain recursive L3 pagetable entries. An attacker on the guest can exploit this to...

Citrix XenServer Multiple Security Updates (CTX216071)

A number of security vulnerabilities have been identified in Citrix XenServer that may allow malicious privileged code running within a guest VM to compromise the host. SPDX-FileCopyrightText: 2016 Greenbone AG Some text descriptions might be excerpted from a referenced sources, and are Copyright...

How to take Pool Metadata backup on XenServer 8.2 CU1

What is Pool Metadata ? XenServer hosts use a database on each host to store metadata about VMs and associated resources such as storage and networking. When combined with storage repositories, this database forms the complete view of all VMs available across the pool. Therefore, it is important ...

Error: "Server Still Booting" and XenServer not exiting maintenance mode after unexpected shutdown

After an unexpected shutdown or restart, your XenServer host might experience of the following issues: Hostswith more than 100 days uptime and local storage attached when rebooted can't connect to the local storage. The host doesnot come out ofmaintenance mode. When you try to exit the server fro...

How to change the XenServer Pool master role from XenServer Console

In certain situation like Master server becoming unresponsive, we may need to changethe XenServer Pool master role. This article illustrates how to perform that from XenServer Console...

How to Find dom-id or Domain ID of Virtual Machines Running On XenServer

Note : Domain ID or domid is only for Running VMs or Booting VMs. A VM which is powered off will not have a domid of its own Run the following command to obtain the domain ID of a particular VM running on XenServer. xllist | grep -i "VMNAME" OR listdomains | grep -i VMUUID In the above case , the...

Citrix XenServer Multiple Vulnerabilities (CTX214954) (Bunker Buster)

The version of Citrix XenServer running on the remote host is missing a security hotfix. It is, therefore, affected by multiple vulnerabilities : - A privilege escalation vulnerability known as 'Bunker Buster' exists in the paravirtualization PV pagetable implementation due to incorrect usage of...

Citrix XenServer Multiple Security Updates (CTX214954)

A number of security vulnerabilities have been identified in Citrix XenServer that may allow a malicious administrator of a PV guest VM to compromise or crash the host. SPDX-FileCopyrightText: 2016 Greenbone AG Some text descriptions might be excerpted from a referenced sources, and are Copyright...

PVS Targets Displays Blue Screen With Error Code 7B On Xenserver 6.1 and Later

PVS targets give a blue screen error code 7B when on Xenserver 6.1 or later hypervisor...

Connecting XenServer to XenCenter with AD User credentials fails with incorrect username/password

When trying to add a new host to XenCenter console, the process fails with the message "XenCenter has encountered a problem connecting to this server" and "Incorrect username and/or password". A second XenServer pool using the same AD authentication configuration same domain, same AD groups can...

Citrix XenServer Active Directory Authentication Incorrect Host Management Security Bypass (CTX213549, CTX213769)

The version of Citrix XenServer running on the remote host is 7.x prior to 7.0 hotfix XS70E003. It is, therefore, affected by a security bypass vulnerability due to incorrect handling of Active Directory AD credentials. An unauthenticated, remote attacker on the management network with AD...

Citrix XenServer Insecure Host Management AD Authentication Vulnerability

The Citrix XenServer product line is an enterprise-class platform that manages server virtualization in the data center by flexibly aggregating compute and storage resources. A security vulnerability in XenServer Hotfix XS70E003 prior to version 7.0 could allow a user with Active Directory...