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Jeroen W. Pluimers on .NET, C#, Delphi, databases, and personal interests

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Archive for the ‘ESXi5’ Category

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Many Cores per Socket or Single-Core Socket Mystery | VirtualPharaohs

Posted by jpluimers on 2016/05/30

Interesting:

Summary:

  1. It is for virtual NUMA, and it depends.
  2. It is only helpful if the host can do NUMA.
  3. It is only relevant when you allocate more than 8 effective cores for a VM.

When neither apply: just use “number of cores per socket” as “number of virtual sockets” might be limited in the guest operating system licensing.

–jeroen

Posted in ESXi5, ESXi5.1, ESXi5.5, ESXi6, Power User, Virtualization, VMware, VMware ESXi | Leave a Comment »

“Unable to connect to the MKS”: the port 902 problem.

Posted by jpluimers on 2016/05/23

A message like “Unable to connect to the MKS” usually does not mean you have reached the maximum of 10 connections for a VM.

Usually it means there is some network issue, like a firewall or router misconfiguration.

Port 902 is used (both TCP and UDP) to provide (among others, hence MKS) console connections.

The default MKS port is 902, and you cannot change it.

For vCenter it is even worse as you cannot even go through NAT:

About the only solution is to tunnel through SSH: VMWare vSphere Client Remote Access via SSH Tunnel and redirect ports 443, 902 and 903.

–jeroen

via:

Posted in ESXi5, ESXi5.1, ESXi5.5, ESXi6, Power User, Virtualization, VMware, VMware ESXi | Leave a Comment »

Lantronix SpiderDuo Remote KVM Switch: Affordable KVM Over IP Switches

Posted by jpluimers on 2016/05/02

Lantronix SpiderDuo Remote KVM Switch: Affordable KVM Over IP Switches.

Interesting KVM-over-IP solution.

–jeroen

via: A bunch of stuff broke this month, learned a lot fixing it all | TinkerTry IT @ Home.

Posted in ESXi4, ESXi5, ESXi5.1, ESXi5.5, ESXi6, Network-and-equipment, Power User, Virtualization, VMware, VMware ESXi | Leave a Comment »

SATA controller links for ZFS and ESXi

Posted by jpluimers on 2016/04/08

Some useful links:

M1015 is still used a lot, but there are many choices for SATA/SAS HBAs that are compatible with ESXi and ZFS.

SATA passthrough for many things seem to have stopped with ESXi 5.5 (5.1 and below should work). Some links related to that:

IDE and USB passthrough of CD/DVD devices seem to be fine though:

OEM adapters:

There are many SFF-8088 to SFF-8087 adapters.

–jeroen

via

Posted in ESXi5, ESXi5.1, ESXi5.5, Power User, Virtualization, VMware, VMware ESXi | Leave a Comment »

How too many vCPUs can negatively affect performance | Gabes Virtual World

Posted by jpluimers on 2016/01/03

Interesting:

Think twice before you give VMs extra vCPUs which they don’t really need. You can negatively impact the performance of your environment since the vmkernel has to try and find a time slot in which it can give all vCPUs access to the physical cores.

Source: How too many vCPUs can negatively affect performance | Gabes Virtual World

Related:

–jeroen

Posted in ESXi5, ESXi5.1, ESXi5.5, Power User, Virtualization, VMware, VMware ESXi | Leave a Comment »

ESXi: specifying the ciphers used to serve the vSphere Client

Posted by jpluimers on 2015/08/14

You can specify the ESXi ciphers used to serve the vSphere Client. You can do this both ways: either extend them (make it less secure, but more compatible, for instance to server vSphere Client on Windows Server 2003 / Windows XP), or restrict them to make it more secure.

VMware recommends the cipherList ALL to make it more compatible: VMware KB: vSphere Client and vSphere PowerCLI may fail to connect to vCenter Server 5.0, 5.1 and 5.5 due to a Handshake failure.

However, ALL  is far too wide to be secure. Since cipherList uses the standard cipher list format documented at ciphers – SSL cipher display and cipher list tool.

You can use the cipher lists from Strong SSL Security on nginx – Raymii.org:

Read the rest of this entry »

Posted in ESXi5, ESXi5.1, ESXi5.5, ESXi6, Power User, PowerCLI, Virtualization, VMware, VMware ESXi | Leave a Comment »

ESXi Embedded Host Client – VMware Labs

Posted by jpluimers on 2015/08/14

Interesting: ESXi Embedded Host Client – VMware Labs.

Posted in ESXi5, ESXi5.1, ESXi5.5, ESXi6, Power User, Virtualization, VMware, VMware ESXi | Leave a Comment »

Accessing the ESXi Direct Console User Interface DCUI via SSH – Wahl Network

Posted by jpluimers on 2014/11/05

I just learned (thanks Chris Wahl!) about the dcui command: often easier to configure basic parameters than the other UIs.

The DCUI is normally available from the console after you login, for instance to enable SSH.

This was new to me:

DCUI is available over SSH.

Even more embarrassing: duic has been actually there since ESXi 4.1 (:

–jeroen

via: Accessing the ESXi Direct Console User Interface DCUI via SSH – Wahl Network.

Posted in *nix, ESXi4, ESXi5, ESXi5.1, ESXi5.5, Power User, Virtualization, VMware, VMware ESXi | Leave a Comment »

Windows 8.1 on VMware ESXi 5.1: Minimize/Maximize/Close buttons are invisible but functional

Posted by jpluimers on 2014/04/25

(Another one in the missed schedule list: this post was scheduled for this morning 06:00)

When you run a Windows 8.1 guest on VMware ESXi 5.1 with the VMware tools that belong to ESXi 5.1, the Minimize/Maximize/Close buttons are invisible but functional.

It doesn’t matter how you access that VM:

  • Through an RDP session (from either the MS RDP client on Mac OS X or MSTSC on a Windows machine).
  • Through a Console Window from vSphere Client connected to the ESXi host (if that client does not run on Windows XP).
  • Through a Console Window from VMware Workstation connected to the ESXi host.

It is good to know that this is just a visual artefact, the Minimize/Maximixe/Close buttons still work:

I was having the same exact problem with my Windows 8.1 VM.  If you click the location where the buttons should be, it still works like they are there.

But he uses a solution that is not really the kind I like:

I opened Device Manager on the VM and then uninstalled the VMware Display Adaptor, including the software for the driver.  After doing that, I scanned for hardware changes and it reinstalled the display adaptor using a windows driver.

The youngest VMware Tools version it fails with on my system is this one: 9.6.1.1378637.

Uninstalling the driver from the device manager indeed solves the issue, but:   Read the rest of this entry »

Posted in ESXi4, ESXi5, ESXi5.1, ESXi5.5, Power User, VMware, VMware ESXi, VMware Workstation | Leave a Comment »

7zip on ESXi through p7zip

Posted by jpluimers on 2014/04/13

A while ago, I wrote about getting rsync on ESXi: ESXi 5.1 and rsync – damiendebin.net.

Now I needed [WayBack] 7zip on ESXi to make sure I could test unpack some 7zip archives.

This turned out much easier than I thought, thanks to [WayBack] 7Zip for ESXI | Vladimir Lukianov: Заметки who pointed me to the [WayBack] P7ZIP project. P7ZIP actually created three things:

  • p7zip (a POSIX 7zip),
  • J7ZIP (a Java port of 7zip)
  • java_lzma (the Java port of the [WayBack] 7zip lzma SDK which had the first implementation of [WayBack] lzma).

Here are the full steps to get 7zip on ESXi 5.x:

Read the rest of this entry »

Posted in *nix, *nix-tools, ESXi4, ESXi5, ESXi5.1, ESXi5.5, Linux, Power User, SuSE Linux, VMware, VMware ESXi | Tagged: , | 3 Comments »

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