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Archive for the Virtualization category

What HMC is managing an LPAR?

Posted on Tue, Oct 25, 2022 at 11:41 by Hubertus A. Haniel

Trying to work out what HMC is managing an LPAR? - Simple command that I always forget!

This is to work out what the HMC is that is managing an LPAR from AIX on the actual LPAR.

The command you are looking for is "lsrsrc IBM.MCP".

- Note the above command is lsrsrc NOT lssrc!

This will return a bunch of information - The bits you are looking for is "KeyToken" which is the HMC hostname and "HMCIPAddr" which is the public IP address of the HMC. "HMCAddIPs" is the private IP that is talking to the pSeries frame.

There may more than one resource listing these if there are two HMC's that are connected.

Edited on: Wed, Jun 04, 2025 11:42

Posted in System - AIX (RSS), Virtualization (RSS)

LXC - Linux Containers on OpenSuSE/SLES

Posted on Wed, Oct 05, 2011 at 9:27 by Hubertus A. Haniel

Recently somebody pointed me at LXC so I thought I give it a try.

As I mainly work on SuSE/SLES - I attempted this following the documentation at http://en.opensuse.org/LXC with a little extra help from http://lxc.teegra.net unsing OpenSuSE 11.4

At the time of me writing this the OpenSuSE guide did work pretty well but I had to make a few adjustments to get the container running properly:

• To get the network to start up properly I had to comment out the paragraph that sets the mode to "onboot" in /etc/init.d/network so during boot it is just called with start. - This is a bit of a hack and may break things if the networking setup is a little more complex then a single interface. I also adjusted my config slightly to use DHCP rather then static addresses as that is a little easier to handle in my test environment.
• This is not mentioned in the documentation I found but autofs has problems within a container. - My homedirectory gets mounted from a NFS server and autofs just seemed to hang while a hard nfs mount in fstab would work just fine.
• Booting the environment came up with lots of errors about udev so I re-enabled that even though the documentation mentions that it should be taken out.

I have the advantage that I have puppet in my environment to adjust the configuration of systems to suit my test environment but a few things to make LXC on SuSE viable in a proper environment would be:

• LXC/YaST intigration so AutoYaST templates could be fed into a container creation.
• Currently there are no LXC templates for OpenSuSE or only the frameworks so one would have to create proper templates to use the lxc-create/lxc-destroy commands to create and destroy containers on the fly.
• LXC is part of the SLES11 distribution but there does not seem to be any documentation what Novell would support inside a container in a production environment especially since I had to hack startup scripts in /etc/init.d so I think the startup scripts would need to be properly adjusted to be aware to do the right things if they are running inside a container. Hacking the start up scripts is not really an option as those changes may get reversed out during patching.

Other then the above concerns and gotchas LXC is a very interesting project and has the potential of Solaris Zones and offers for Linux a full compliment of Virtualisation technologies alongside UML (Not realy used any more), Xen and KVM.

Posted in HowTo (RSS), System - Linux (RSS), Virtualization (RSS)

Welcome - Notes from a Linux/Unix Engineer

Posted on Tue, Jun 01, 2010 at 11:11 by Hubertus A. Haniel

I used to collect notes documents and HOWTO's at http://www.rootunix.org  which are now archived at http://www.unixcook.com/old-unix-docs/  as it was difficult to maintain and I got lazy with it. I have come across a cross-platform blog software called Thingamablog   which is written in Java so it works on Windows and Unix and I am hoping that it will enable me to publish useful notes at a quicker pace with not a lot of messing around.

We will see how successful that will be....

Posted in Automation (RSS), HowTo (RSS), Packaging (RPM) (RSS), Shell Scripting (RSS), System - AIX (RSS), System - Apple / OSX (RSS), System - Linux (RSS), System - Solaris (RSS), System - Windows (RSS), Virtualization (RSS)