Migrations Xen, Wheezy, Postgres and Python3
The last couple of days I have been busy migrating my vserver.
It all started out when I had the glorious idea to upgrade Debian squeeze to wheezy in order to be able to use python2.7. As it turned out that wasn’t as easy as expected. Wheezy requires a kernel of at least 2.6.26. My vserver was running on a host using 2.6.18.
My hoster told me that a kernel upgrade wasn’t possible. I would have to switch to a Xen based virtual machine instead. I glanced at the Xen offering. Better hardware, more features, same price. So why not? Copying some files from A to B can’t be too hard.
As it turns out, such a migration can take quite some time. Especially if you don’t simply copy one-to-one but actually improve change your setup.
So what changed along the way?
- Cleaned up the nginx configuration. The most noticeable change is that the blog now redirects to https.
- It’s running on python2.7 python3.2.
- Everything runs on postgres instead of mysql. Not that mysql isn’t good enough. But I want to get some experience with postgres.
- Postfix runs together with dovecot instead of courier. Damn, configuring that thing can be hard, especially if you read the wrong documentation.
- The whole setup is a little bit more secure.
- Piwik is gone as it doesn’t support postgres (yet).
I still have some more things to move. But most of the work is done. In the next couple of days I might pick up some of the pitfalls I run into and write about them.