gansercom

just another private tech blog

Tag: vmware (Page 20 of 21)

Wrong “Uptime” on guests running Windows 2008 / 2008 R2 / 7 / 8

9. July 2015 / / 0 Comments

Today I’ve found a little failure within our production environment.

We use icinga to monitor our production lan, its guests and services. For our Citrix XenApp servers we check the uptime to get notified if they are running to long without reboot.

After we upgrade several servers to vmx-10 everything works fine. Icinga reports all services and performance charts correctly. Now, two days later, the first uptime alerts came up. But the system boot time was only a few hours ago and not two days…

uptimevmx10000004

If we power off and power up the machine the uptime does reset.
The counter didn’t reset if the machine is only warm rebooted.

Continue reading

Migrate Windows vCenter Server 5.5 to vCenter Server Appliance 5.5

24. June 2015 / / 0 Comments

The VMware Labs engineers created a converter machine to migrate your vCenter Server 5.5 installed on a Microsoft Windows Server to the vCenter Server Appliance.

This guide shows the steps to successful migrate the data.

Attention:

With the experience I’ve made I could not recommend the use of the Fling in production. I’ve tested several times the conversion in Testlab without any errors. But the database of our production seems to have many object which are not upgradeable from vCSA 5.5 to vCSA 6. The Upgrade fails in a vPostgres firstboot error.

VMware Flings are not offical software releases from VMware.
Your support might be obolete by using this Fling.
Read the Technical Preview Agreement

Continue reading

Workaround for migrating W2k12 vCenter Server 5.5 to vCenter Server Appliance 5.5

24. June 2015 / / 0 Comments

The VMware Labs engineers built a fling to migrate a vCenter Server installed on a Windows Server to the vCenter Server Appliance.

For me the greatest limitation is that Windows Server 2012 a higher isn’t supported yet. Because of “winexe-bug” the migration appliance could not get the data from the source machine. William Lam told me that the engineers know about this issue and hopes that it would be fixed soon.

For all of you who could not wait… maybe I’ve a workaround.

Continue reading

ESXi host performance vs. power consumption

23. March 2015 / / 0 Comments

In my last training Fabian Lenz and I discuss pro and con of  power management in ESXi.

We thought DPM is mostly used in VDI-environments. In those environments the savings would be the best, because the virtual desktops didn’t work at night and many of the ESXi hosts could be powered off. But DPM ist not the only thing which affects the power consumption. ESXi could use ACPI C- and P-States from the CPU to control the power of the physical cores. Fabian experiements with a bigger VDI environment and gets interessting informations with activated DPM (watch his blog).

Continue reading

« Older posts Newer posts »

Archives

© 2025 gansercom

Theme by Anders Noren — Up ↑