Virtualization

Replaced certificates and get vSphere HA Agent unreachable? I have heard this multiple times in the last couple of weeks. I started looking in to it and it seems that in many of these scenarios the common issue was the thumbprints. The log files typically give a lot of hints that look like this: [29904B90 verbose 'Cluster' opID=SWI-d0de06e1] [ClusterManagerImpl::IsBadIP] is bad ip Also note that the UI will state “vSphere HA agent unreachable” in many of these cases. Yes I know, these error messages can be improved for sure. You can simply solve this by disconnecting and reconnecting the hosts. Yes it really is as simple as that, and you can do this without any downtime. No need to move the VMs off even, just right click the host and disconnect it. Then when the disconnect task is finished reconnect it. "Replaced certificates and get vSphere HA Agent unreachable?" originally appeared on Yellow-Bricks.com. Follow me on twitter - @DuncanYB.

It is going to be very difficult for Microsoft to succeed with Windows 8.1, and that has little to do with whether the official build will include a Start button or boot-to-desktop option. Rather, it's because Microsoft picked a terrible time to release the upcoming follow-on to Windows 8....

Many times in discussions about cloud computing, the hybrid cloud - meaning a service that combines both off-site public cloud and on-premises private cloud computing resources - is thought of as being some nirvana state that will be the dominant architecture at some point in the future....

It's been amusing to watch numerous storage vendors announce that they, and they alone, have the magic feature (derived from unicorn tears) that will allow you to build a VDI environment to satisfy two cranky constituencies: the users, who will break out torches and pitchforks if their thin-client experience is inferior to their old PCs, and the bean counters, who've drunk the Kool-Aid® and think VDI will let them save capexand opex....

This document provides concepts and considerations that complement the XenApp Connector for Configuration Manager 2012 product documentation on Citrix eDocs in the most succinct possible manner, and is intended for organizations conducting evaluations and/or implementations of the product at an Enterprise level....

Two very large clouds have been hanging over Dell for most of the year: the flailing PC market, and CEO Michael Dell's ongoing attempt to take the company private. Despite these distractions, Dell itself has spent 2013 doing exactly what it did at the end of 2012: launching new enterprise products and declaring that its transition from PC maker to end-to-end solution provider has concluded. ...

A regional, 120-year-old bank has played an important role in restoring and preserving the historic landmark buildings in Kansas and provides banking services throughout Eastern Kansas. As with any financial institution, they needed a data backup solution that would protect their customers and provide for off-site disaster recovery if necessary. Their legacy system was unable to provide complete data protection or integrate newer technologies....

This white paper describes best practices in building storage infrastructure for VMware ESX Environments. Topics covered include: The disk partitioning of an ESX host, VMware snapshots and creating/locating virtual disks, as well as monitoring snapshot files....

Looking through a computer parts catalog the other day as I contemplated building a new PC for myself, I was shocked by how affordable solid state drives (SSD) have become. The channel seems to be noticing, too, and not just in the DIY-PC market. SSD is also becoming increasingly popular in the cloud, and providers are working hard to pitch it to cloud users?as SolidFire, for instance, has started doing in discussions around Citrix (CTXS) CloudPlatform powered by Apache CloudStack....

Last week on twitter someone mentioned he received the error that he had less than two vSphere HA heartbeat datastores configured. I wrote an article about this error a while back so I asked him if he had two or more. This was the case, so next thing to do was to “reconfigure for HA” to clear the message hopefully. The number of vSphere HA heartbeat datastores for this host is 1 which is less than required 2 Unfortunately after reconfiguring for HA the error was still there, next suggestion was looking at the “heartbeat datastore” section in HA. For whatever reason HA was configured to “Select only from my preferred datastores” and no datastores were selected just like in the screenshot below. HA does not override this so when configured like this NO heartbeat datastores are used, resulting in this error within vCenter. Luckily the fix is easy, just set it to “Select any of the cluster datastores”. the number of heartbeat datastores for host is 1 "Number of vSphere HA heartbeat datastores less than 2 error, while having more?" originally appeared on Yellow-Bricks.com. Follow me on twitter - @DuncanYB.