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VMWare

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Building vmware-tools in your Oracle Linux UEK3 VM

This is a quick writeup of an oddity I found while trying to install the vmwareware tools in an Oracle Linux host with the UEK3 kernel enabled (which is by default).

This is what is encountered during the vmware tools installation dialog when running vmwaretools.pl:

Searching for a valid kernel header path...
The path "" is not a valid path to the 3.8.13-16.2.2.el6uek.x86_64 kernel 
headers.
Would you like to change it? [yes]

The building of vmware tools fail because the kernel headers can not be found: the installer doesn’t see the kernel headers, whilst you probably installed it (it’s the kernel-uek-devel package belonging to the running kernel).

WebLogic 11g, Forms, ADF, Oracle Linux and VMware

Following on from my recent batch of “what I’m doing at the moment” style posts, I just thought I would mention some of the infrastructure I’ve been installing and configuring recently…

We are still part way through a migration from Oracle Application Server to WebLogic 11g. There are many applications to migrate and test, fortunately not by me, but they fit into two main categories.

Tomcat, Oracle Linux and VMware

Following from yesterday’s post about Cloud Control 12cR3, Oracle Linux and VMware, I thought I would just mention something I put live yesterday evening.

We have a 3rd party Java-based application that runs on Tomcat 7 and Java 7 that until recently was running on RHEL5 on physical hardware. It runs against an Oracle database, but that is not housed on this server. This application is not that big, but it is *very* high profile as it is what we use to process our REF submissions. If you know anything about higher education in the UK, you’ll know that REF is a very big deal, especially as we are within a couple of months of the next submission.

Cloud Control 12cR3, Oracle Linux and VMware

I mentioned some time ago that I was pushing my current company to move much of their gear on to VMware, mostly because of poor resource utilization on many of the servers. That process is still under way.

One thing I wanted to mention specifically was our use of Cloud Control 12cR3. Up until recently, we were using physical kit for this. We had an 11.2 database on HP-UX, With HA provided by HP Service Guard. We had two management servers on physical kit running RHEL5 pointing at this Service Guard package to give us some resiliency in of the OMS. It worked, but it was over complicated and I was never really happy with it for a number of reasons:

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How to improve VMware performance on your PC

I found very interesting post here - VMware Performance Enhancing Tweaks (Over-the-Counter Solutions). I used it on my VMware Player and Workstation and when I disabled vmem file my laptop it stopped blinking HDD led for 5 - 10 min every time it wake up from sleep mode.

regards,
Marcin

How to improve VMware performance on your PC

I found very interesting post here - VMware Performance Enhancing Tweaks (Over-the-Counter Solutions). I used it on my VMware Player and Workstation and when I disabled vmem file my laptop it stopped blinking HDD led for 5 - 10 min every time it wake up from sleep mode.

regards,
Marcin

All change. Virtualization, here we come!

Followers of the blog will know I dig virtualization. I first ran Oracle in virtualized environments over a decade ago.

In my current company there is a strong virtualization presence in the Windows space. Pretty much all Windows servers, including those running MS SQL Server, are actually VMs running on a VMware farm. The UNIX/Linux side is a little different. Most stuff is still done on physical boxes and what little virtualization is done, uses CentOS and KVM for freebie open source solutions.

There are a lot of architectural changes going on at the moment and I’ve been pushing *very hard* for a switch to the virtual infrastructure (VI) for all our middle tier servers and a few of our databases. It is looking very likely (but not guaranteed) that this will happen.

Adding disks to VMware Workstation 8 on the fly on RHEL 6

Although this post is primarily written for users of VMware Workstation 8 it is applicable for any RedHat 6 clone and adding disks with single path on the fly. Multipathing requires additional setup in dm-multipath or the vendor multipathing software which I won’t cover here. A quick hint though: you need to set disk.EnableUUID = “TRUE” in your VM’s config file for scsi_id to return a value.

The situation is common: you created a virtual machine and need more storage. Hopefully you created it using LVM which would allow you to add the new disk to an existing volume group followed by a resize operation of the logical volume which is short on space. But before you can do this you have to add a new LUN to your setup-here is how you can do this without rebooting the VM.

First I recommend you install lsscsi (for convenience, not really necessary) and the sg3_utils:

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