[Linaro-validation] Switching LAVA Deployment to buildout
abner at collabora.co.uk
Tue Jun 12 14:10:15 UTC 2012
On Tue, 2012-06-12 at 17:07 +1200, Michael Hudson-Doyle wrote:
> Those of you who have been around for a while will know that we used
> to package LAVA as Debian packages. This had its problems and we
> switched over to the world of pip and virtualenv and
> Unfortunately, pip and virtualenv have not really given us the control
> we need to be confident in our deployments, and so I'm proposing to
> change again, this time to zc.buildout. This is less of a change than
> the switch away from debs -- instances of LAVA will still be a concept
> and the lava-deployment-tool script will still be used, at least for now.
> The way buildout works is that there is a config file that specifies
> how -- reproducibly! -- to assemble various pieces into a deployment.
> I have a branch of lava-server at lp:~mwhudson/lava-server/use-buildout
> that contains such a config file (and various other related bits and
> pieces), and a branch of lava-deployment-tool that creates a
> buildout-based deployment.
> An instance on disk in the new world is similar to but not the same as
> an instance is today. In particular it is not a virtual environment
> -- although for compatibility, it looks like one. There is still a
> $LAVA_INSTANCE/bin/activate script that you can source in bash to put
> that instance's scripts at the front of your $PATH. Inside an
> instance, the etc, run, tmp and var directories server the same
> function as they do today. There is also a new directory, code. The
> code directory contains a number of subdirectories, one for each revno
> of lava-server that has been installed into that instance, and a
> symlink 'current' that points to the currently active one.
> There are now two merge proposals on LP:
> I've made an effort to update the documentation in l-d-t's README, and
> I've put an htmlified version of this file online at
> http://people.linaro.org/~mwh/ldt.html so that might be a good place
> to start.
As I never worked with buildout before I was wondering if there was a
discussion around this topic before deciding to adopt this new
deployment approach. I would like to read that and see what was
discussed and what are the main advantages of changing how to deploy
Lava once again. Is it available somewhere?
In case this change really happen, I believe that would be nice to have
some sort of tutorial teaching how to migrate your current setup and
deploy it with buildout, without loosing your database, etc.
Also, I remember to have long conversations on IRC with you guys and
IIRC there was an agreement that Lava would also be released as deb
packages again, so we would have an option to use pip or debs. How is
Please, forgive me if I missed any important discussion.
Thanks in advance.
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Abner José de Faria Silva
Collabora Ltd, Recife - Brazil
PGP: 0x627A4C8C @ wwwkeys.pgp.net
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