On Thursday, January 8, 2015 at 1:20:39 PM UTC+2, Mike Dewhirst wrote:
>
> Have you seen Mezzanine fab deployment? Ken Bolton has blogged about it
> ...
>
> http://bscientific.org/blog/mezzanine-fabric-git-vagrant-joy/
>
Seems interesting. I have to play with it.
The biggest issues for me are that you use settings file directly to have
your deployment description. Also, at least by default this solution
doesn't work on Docker (though vagrant does seem to have Docker support, so
it might be just a configuration issue).
What I did in django-dockerfile, and what I really like about
django-dockerfile, is that server specific configuration is separated from
settings.py. There is usually a base, secrets and then deployment
environment files. The way this works is that base.env could contain the
following:
{
"DATABASE_HOST": null,
"DATABASE_PASSWORD": null,
"DATABASE_USER": "someuser
}
Here null values denote that these settings must be overridden by other
environment files.
secrets.env could contain:
{
"DATABASE_PASSWORD": "somepassword"
}
and then production.env has:
{
"from": ["base.env", "secrets.env"],
"DATABASE_HOST": "example.com"
}
Now, when using production.env, first variables from base.env are read,
then vars from production.env override the DATABASE_PASSWORD variable, and
finally the production.env overrides the DATABASE_HOST variable.
The project's settings.py uses environment variables always, so that there
is no need for multiple different settings files.
The point is that it is very easy to have production, qa and other needed
environments set up. Just create a qa.env and inherit from base.env. The
code used for different environments is always the same, including the
settings file which makes it easier to see what is actually going on with
settings.
- Anssi
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