Removing XenServer and KVM Hosts

12.4.1. Removing XenServer and KVM Hosts

A node cannot be removed from a cluster until it has been placed in maintenance mode. This will ensure that all of the VMs on it have been migrated to other Hosts. To remove a Host from the cloud:

1.Place the node in maintenance mode.

See Section 12.2, “Scheduled Maintenance and Maintenance Mode for Hosts”.

2.For KVM, stop the cloud-agent service.

3.Use the UI option to remove the node.

Then you may power down the Host, re-use its IP address, re-install it, etc

12.4.2. Removing vSphere Hosts

To remove this type of host, first place it in maintenance mode, as described in Section 12.2, “Scheduled Maintenance and Maintenance Mode for Hosts”. Then use CloudPlatform to remove the host. CloudPlatform will not direct commands to a host that has been removed using CloudPlatform. However, the host may still exist in the vCenter cluster.

12.5. Re-Installing Hosts

You can re-install a host after placing it in maintenance mode and then removing it. If a host is down and cannot be placed in maintenance mode, it should still be removed before the re-install.

12.6. Maintaining Hypervisors on Hosts

When running hypervisor software on hosts, be sure all the hotfixes provided by the hypervisor vendor are applied. Track the release of hypervisor patches through your hypervisor vendor’s support channel, and apply patches as soon as possible after they are released. CloudPlatform will not track or notify you of required hypervisor patches. It is essential that your hosts are completely up to date with the provided hypervisor patches. The hypervisor vendor is likely to refuse to support any system that is not up to date with patches.

Note

The lack of up-do-date hotfixes can lead to data corruption and lost VMs.

(XenServer) For more information, see Highly Recommended Hotfixes for XenServer in the CloudPlatform Knowledge Base1.

12.7. Using Cisco UCS as Bare Metal Host CloudPlatform

(Supported only for use in CloudPlatform zones with basic networking.)

You can provision Cisco UCS server blades into CloudPlatform for use as bare metal hosts. The goal is to enable easy expansion of the cloud by leveraging the programmability of the UCS converged infrastructure and CloudPlatform’s knowledge of the cloud architecture and ability to

1http://support.citrix.com/article/CTX133467

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Citrix Systems 4.2 Re-Installing Hosts, Maintaining Hypervisors on Hosts, Using Cisco UCS as Bare Metal Host CloudPlatform
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4.2 specifications

Citrix Systems, a leading provider of virtualization solutions and cloud computing technologies, released version 4.2 of its popular software, Citrix XenApp, which was previously known as Presentation Server. This version marked a significant evolution in providing users with remote access to applications and desktops, emphasizing simplicity, performance, and security.

One of the standout features of Citrix XenApp 4.2 is its improved application streaming capabilities. This technology allows applications to be delivered to users in real-time, reducing the need for extensive local installations and enhancing the user experience. With application streaming, administrators can efficiently manage applications on a central server while ensuring that users have immediate access to the necessary tools.

Another highlight of this version is the enhanced security measures put in place to protect sensitive data. Citrix XenApp 4.2 includes support for SSL encryption, providing a secure communication channel for data transmitted between the server and clients. This is particularly crucial for businesses that need to comply with strict data protection regulations. Additionally, the integration of endpoint security features ensures that unauthorized access to applications is minimized.

Performance enhancements are also a critical focus in this release. Citrix optimized the delivery of applications over various network conditions, ensuring that users experience minimal latency regardless of their location. This was achieved through the incorporation of SmartAccess and SmartControl technologies, which allow administrators to set policies based on user roles, device types, and network conditions. This level of granularity enables organization-wide security without compromising on usability.

The user experience was further improved with a revamped interface, making it easier for end-users to access their applications and data. Simplified menus, clear navigation paths, and the ability to customize user settings contributed to a more efficient workflow, allowing users to focus on their tasks rather than struggling with the software.

Finally, Citrix XenApp 4.2 was designed to be highly scalable. Organizations of all sizes could deploy this solution to deliver applications efficiently, adapting to their specific needs as their user base grows or changes. This flexibility is crucial for businesses looking to future-proof their IT investments while maintaining optimal performance.

In summary, Citrix XenApp 4.2 stands out with its enhanced application streaming, robust security features, improved performance under varying conditions, user-friendly interface, and scalability, making it an ideal choice for organizations seeking to leverage virtualization for remote access to applications and desktops.
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