ubuntu – Made by Mikal

Openstack compute node cleanup

Post author:mikal
Post published:December 20, 2011
Post category:OpenStack

I've never used openstack before, which I imagine is similar to many other people out there. Its actually pretty cool, although I encountered a problem the other day that I think is worthy of some more documentation. Openstack runs virtual machines for users, in much the same manner as Amazon's EC2 system. These instances are started with a base image, and then copy on write is used to write differences for the instance as it changes stuff. This makes sense in a world where a given machine might be running more than one copy of the instance. However, I encountered a compute node which was running low on disk. This is because there is currently nothing which cleans up these base images, so even if none of the instances on a machine require that image, and even if the machine is experiencing disk stress, the images still hang around. There are a few blog posts out there about this, but nothing really definitive that I could find. I've filed a bug asking for the Ubuntu package to include some sort of cleanup script, and interestingly that led me to learn that there are plans for a pretty comprehensive image management…

I got MythBurn working!

Post author:mikal
Post published:July 24, 2006
Post category:Mythtv

It took a few hours, but I have MythBurn (a web interface for creating DVDs with MythTV) finally working. The problem was that the mjpegtools shipped with Ubuntu Dapper crashes with an invalid free(). Compiling from source fixed that. Update: I might have lied. I now have troubles getting Xine to playback the DVD when I mount the ISO image through a loop back. I don't have any DVD media handy, so I will have to wait a couple of days until I can do more testing. The symptom I see is that the intro MythTV screen plays, and then Xine freezes before displaying the menu.

MySQL Workbench

Post author:mikal
Post published:April 26, 2006
Post category:Mysql

Was just introduced in the keynote and looks kinda cool. It isn't packaged in Ubuntu yet, which is a shame...

MySQL Workbench

Post author:mikal
Post published:April 26, 2006
Post category:Mysql

Was just introduced in the keynote and looks kinda cool. It isn't packaged in Ubuntu yet, which is a shame...

Compiling MythTV 0.19 for Ubuntu Dapper

Post author:mikal
Post published:March 27, 2006
Post category:Mythtv

I've been finding that MythTV is really unreliable after dist-upgrading from Breezy to Dapper. In fact, it's been crashing six or seven times a day, which has been really annoying. I figured I though therefore bight the bullet and upgrade to the latest stable version of MythTV. I was previously running a SVN snapshot because it fixed a couple of bugs I was having when I first installed Myth. Installation was pretty easy. First, grab the one or two libraries you're missing and that the configure script doesn't necessarily detect the dependency for properly: sudo apt-get install mesa-common-dev libgl1-mesa-dev libglu1-mesa-dev \ libqt3-mt-dev libqt4-dev mesa-common-dev qt3-apps-dev libglu1-mesa fftw3 \ fftw3-dev libsdl1.2-dev festival festival-dev libdvdread3 libdvdread3-dev And then the usual configure, make, make install in the mythtv and mythplugins directories.