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Empower every worker with one intelligent, flexible workspace. Taking a backup state ensures that you can revert a partially complete rolling upgrade to its original state without losing VM data. Ensure that your hosts are not over-provisioned: check that hosts have sufficient memory to carry out the upgrade. As a general guideline, if N equals the total number of hosts in a pool, there must be sufficient memory across N-1 hosts to run all of the live VMs in the pool.
It is best to suspend any non-critical VMs during the upgrade process. Rolling Pool Upgrade wizard checks that the following actions have been taken. Perform these actions before you begin the upgrade process:. Read the Before You Start information, and then click Next to continue. Select the pools and any individual hosts that you want to upgrade, and then click Next.
If you choose Manual Mode , you must run the XenServer installer on each host in turn. Follow the on-screen instructions on the serial console of the host. When the upgrade begins, XenCenter prompts you to insert the XenServer installation media or specify a network boot server for each host that you upgrade. Choose whether you want XenCenter to automatically download and install the minimal set of updates hotfixes after upgrading the servers to a newer version.
The apply updates option is selected by default. However, you must have internet connection to download and install the updates. Follow the recommendations to resolve any upgrade prechecks that have failed.
If you would like XenCenter to automatically resolve all failed prechecks, click Resolve All. If you choose Automatic Mode , enter the installation media details. Do not enter the user name and password associated with your XenServer pool. When the upgrade begins, the Rolling Pool Upgrade wizard guides you through any actions you must take to upgrade each host. Follow the instructions until you have upgraded and updated all hosts in the pools.
If the upgrade or the update process fails for any reason, the Rolling Pool Upgrade wizard halts the process. This allows you to fix the issue and resume the upgrade or update process by clicking the Retry button. Performing a rolling pool upgrade using the xe CLI requires careful planning.
Be sure to read the following section with care before you begin. You can only migrate VMs from XenServer hosts running an older version of XenServer to one running the same version or higher.
For example, from version 7. You cannot migrate VMs from an upgraded host to one running an older version of XenServer. Be sure to allow for space on your XenServer hosts accordingly.
Citrix strongly advises against running a mixed-mode pool one with multiple versions of XenServer co-existing for longer than necessary, as the pool operates in a degraded state during upgrade. Key control operations are not available during upgrade. Do not attempt to perform any control operations. Though VMs continue to function as normal, VM actions other than migrate are not available for example, shut down, copy and export.
In particular, it is not safe to perform storage-related operations such as adding, removing, or resizing virtual disks. Always upgrade the master host first. Do not place the host into maintenance mode using XenCenter before performing the upgrade. If you put the master in maintenance mode, a new master is designated. This allows you to revert a partially complete rolling upgrade back to its original state without losing any VM data.
If you have to revert the rolling upgrade for any reason, you might have to shut down VMs. For details and instructions, see Before you upgrade a single XenServer host. Start with the pool master. An issue can occur when installing the Citrix VM Tools after uninstalling a previous version of the Citrix VM Tools that returns the following error message: "This Device cannot start code 10 Operation failed The requested operation was unsuccessful".
We recommend that you set the automatic reboot registry key before updating to the latest version of the Citrix VM Tools for Windows. Important: Updating to the 9. If you are on XenServer 7. These versions of the Citrix VM Tools are no longer supported. To be in support, upgrade your Citrix VM Tools to the latest available version. Issues in VMs running older versions of the Citrix VM Tools for Windows can be investigated if the tools version was previously supported for the Citrix Hypervisor release, but any resolution or likelihood of VM recovery depends on the nature of the problem.
You might also be requested to update to the latest set of tools and attempt to reproduce the issue. Any fixes will be provided in a later release of the tools. This release contains an update to the xenbus driver that takes advantage of the new Autoreboot registry key. This registry setting specifies the maximum number of reboots that are automatically completed when using Windows Update to update your drivers. We recommend that you set this registry key before updating to the latest version of the Citrix VM Tools for Windows.
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Small business. What is Citrix Workspace?
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