Posts Tagged ‘ESXi’

list MAC addresses of guest VMs

September 9th, 2009 Comments off

I noticed an IP conflict today on a windows box hosted on the ESXi. In the events viewer under system I checked the MAC address of the system trying to hijack my IP address. I wanted to find a quick way and check if this mac address is in my existing ESXi Virtual Machines or it’s outside somewhere..
I wanted to find a quick and dirty way to check this since there is number of machines on the ESXi host.
Here is what I did…

I opened VMWare VI-TOOLKIT. After I connected I decided to try some commands that I regularly use such as get-vm and get-vmguest. After I found nothing interesting I checked out the CI Toolkit Cmdlets Reference Document.

And there it was… the perfect command for what I wanted..

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Categories: ESX, ESXi, VI, VMware Tags: , , , ,

Use vm-support to stop stalled Virtual Machines

July 30th, 2009 Comments off

In some rare cases you can notice resource allocated to virtual machines that don’t appear to be running.

esxtop can help you find this out.

Using vm-support you can identify the world id of the virtual machine and then using the same command you can generate some support logs and abort the virtual machine.

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Categories: ESX, ESXi, VI, VMware Tags: , , ,

List IP Addresses used in WMWare ESX

April 22nd, 2009 Comments off

How to extract the IP addresses in use by the Guests in our VMware ESX host?
This was the question that I asked myself yesterday, when I had to go over a long list of IPs and check if any of the listed IPs was in use by any Guest Operating system on our ESX server. I immediately thought of the VMware VI Toolkit and all the nice commands that I have seen there, but none of those came to me immediately. A colleague was swifter and used python to get any matches after he copied all IPs manually using the Infrastructure Client, but since I had few spare minutes today, I decided to solve this one and post the answer. Here it is:

[VI Toolkit] C:\Program Files\VMware\Infrastructure\VIToolkitForWindows> get-vmg
uest -vm (get-vm *) |select IPAddress


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Categories: ESX, ESXi, VI, VMware Tags: , , ,

Extending VMDK file and resizing the partition – SLES 10 Linux

April 7th, 2009 Comments off

1. ESXi 3.5 Extending the VMDK file [Virtual Machine Hard Disk]

The main reason behind this is the fact that I needed more space for 2 more Oracle databases on a SLES10 Linux system. The partition mounted on /u01 was initially created as 21GB but I quickly depleted the space with 3 oracle 10g databases that took more than 17GB and the space left was not sufficient for the 2 new databases that I had to create.

Before I advanced with the extension of the VMDK file I connected to each separate instance and performed “shutdown immediate” command as sysdba.
Then I stopped the listener, dbconsole, isqlplus and once I confirmed that no oracle related processes were present on the system I performed a shutdown “shutdown -h now”.

In order to extend an existing hard drive attached to a virtual machine you have to make sure no snapshots of the virtual machine are present. I know that this is quite uncomfortable considering the risky operation that you are about to perform but there is a work around. (The work around is not in this post, so please let me know if you are interested or simply search for it. There is a good chance that I will have an article concerning that topic)

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Oracle 10g RAC on ESXi3 using SLES9 SP5 – Part 10

February 20th, 2009 3 comments

When I finished the clusterware install in the lab environment I have continued with the database software itself but it appears that I needed a VMware ESXi Update 3 required! The kernel version of SLES failed verification and upon an upgrade of the kernel through YAST both machines were unusable since they would not boot.

This is an obstacle until completed since I can’t continue with the How-to until this is done.

In Part 9 of the Oracle RAC How-to we have completed successfully the installation of the Oracle Clusterware services on the shared storage for the two Suse Linux Enterprise Server 9 SP5 nodes.

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VMware VI toolkit

February 18th, 2009 Comments off

VMware VI toolkit (for Windows)

1. Overview and download

The VMware VI toolkit for windows allows you to script administer and manage you virtual infrastructure in command line from your Windows Operating system machine. VMware VI Toolkit requires Microsoft PowerShell to run. If you didn’t have a chance to download those two applications, here are the download links:

Download and install Microsoft PowerShell

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Categories: ESX, ESXi, VMware Tags: , , ,

Oracle 10g RAC on ESXi3 using SLES9 SP5 – Part 9

February 16th, 2009 Comments off

Verify the Oralce Clusterware Installation

With the introduction of Oracle RAC 10g, cluster management is controller by the evmd, ocssd and crsd processes.
Run the ps command on both nodes to make sure that the processes are running.

rac01:/u01/clusterware/cluvfy # ps -ef |grep d.bin
root 4694 1 0 Feb13 ? 00:00:00 /u01/crs1020/bin/crsd.bin reboot
oracle 5242 4692 0 Feb13 ? 00:00:00 /u01/crs1020/bin/evmd.bin
oracle 5344 5326 0 Feb13 ? 00:00:00 /u01/crs1020/bin/ocssd.bin
root 20078 10946 0 09:44 pts/1 00:00:00 grep d.bin

Next you should check the /etc/inittab file, which is processed whenever the runlevel changes:

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Oracle 10g RAC on ESXi3 using SLES9 SP5 – Part 8

February 16th, 2009 3 comments

Oracle Clusterware Installation

Install the xntpd service and configure it.
You can use the Yast management console to do so.
It is extremely important that both nodes are configured to use ntp server and that they are regularly being updated.
If there is any difference at all within the date of all nodes this could result into inoperable cluster.

1. Copy the cpio.gz file to the first node and unzip the contents of the cpio file

#gunzip 10201_clusterware_linux_x86_64.cpio.gz
#cpio -idmv < 10201_clusterware_linux_x86_64.cpio

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Oracle 10g RAC on ESXi3 using SLES9 SP5 – Part 7

February 15th, 2009 2 comments

Configuring and Using Raw Partitions for the Oracle Shared Storage

For the purpose of my cluster I will use raw partitions that are shared disks on the ESXi host.
First I will identify my needs for shared disks and them will create them and format them accordingly.

After some high level overview of my requirements I have created the following list of required files:

asm01.vmdk = 6GB [ ORADATA ]
asm02.vmdk = 2GB [Application data]
asm03.vmdk = 4GB [FLASH]
ocr.vmdk = 256MB [Cluster Registry]
voting.vmdk = 40MB [Voting disk]
spfile.vmdk = 16MB [Parameter configuration]

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Oracle 10g RAC on ESXi3 using SLES9 SP5 – Part 6

February 14th, 2009 Comments off

Linux OS Parameters

Here is the list of the required parameters for clusterware and oracle database 10g

Parameter Value File
semmsl semmns semopm semmni 25 032 000 100 128 /proc/sys/kernel/sem
shmmax The minimum of the following (4 GB – 1 byte), or half the size of physical memory (in bytes), whichever is lower. /proc/sys/kernel/shmmax
shmmni 4096 /proc/sys/kernel/shmmni
shmall 2097152 /proc/sys/kernel/shmall
file-max 65536 /proc/sys/fs/file-max
ip_local_port_range Minimum: 1024 Maximum: 65000 /proc/sys/net/ipv4/ip_local_port_range
rmem_default 262144 /proc/sys/net/core/rmem_default
rmem_max 4194304 /proc/sys/net/core/rmem_max
wmem_default 262144 /proc/sys/net/core/wmem_default
wmem_max 4194304 /proc/sys/net/core/wmem_max

In order to check the values in your system use the sysctl command.
You will probably get the following results from the default kernel configuration:

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