Extend cached Logical Volume

You cannot do this directly for reasons that I have not tried to understand, but I suspect "it is hard" may have something to do with it.

The process is:

  1. Mark your cached LV as uncached
  2. Extended your LV
  3. Recreate your cache

Simple, except there are some gotchas. The process ...

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Upgrade Openstack from Juno to Kilo

It's a process that strikes fear into the hearts of Sysadmins everywhere. This weekend I finally got round to upgrading the Openstack cluster in my lab to Kilo. As I have no spare machines lying around (Intel NUC/HP Microserver/similar donations welcome) I did it in place.

Did ...

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Install Microsoft TrueType fonts on Fedora

Fedora do not bundle Microsoft's core Truetype fonts for licensing reasons. Normallly I do not care, personally I prefer Liberation fonts anyway. However, today I needed to Verdana.

Traditionally, the way to install these on RPM based distributions has been:

  1. Grab the RPM spec file
  2. Build an RPM from ...
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New Linux Active Directory Integration

This used to be quite complex, but now is astoundingly simple. Now there is a new project call realmd. It is in recent version of Debian (Jessie and Sid) and Ubuntu (since 13.04). For Red Hat types, it is RHEL7 and Fedora (since 18).

If you're on Debian ...

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VMware CLI on Ubuntu Saucy Salamander

The current project (as of this week) has me moving away from Openstack for a while. For the next couple of months I will be immersing myself in monitor, metrics and logging. Naturally, this being a shiney new environment, this involves a significant amount of VMware time.

I have inherited ...

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Openstack Neutron Performance problems

For the last few weeks I have been consulting on a private cloud project for a local company. Unsurprisingly this has been based around the typical Openstack setup.

  • Nova - KVM
  • Neutron - Openvswitch
  • Cinder - LVM
  • Glance - local files

My architecture is nothing out of the ordinary. A pair of hosts each ...

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RHEL and CentOS joining forces

Yesterday saw probably the biggest FLOSS news in recent times. Certainly the biggest news of 2014 so far :-) By some freak of overloaded RSS readers, I missed the announcement, but I did see this:

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Integrating RHEL with Active Directory

I had a request on Reddit to share a document I wrote about connect Red Hat Enterprise Linux with Active Directory. The original document I wrote is confidential, but I said I would write it up.

This works for both Server 2008(R2) and 2012. If I recall correctly it ...

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