Add the get_config() method

[tylrd]

Will first check if the env variable exists, and if it doesn't, reads the JSON from a config file.

[alex]

Going to need to think on this, I like the simplicity of only a single configuration method, and an env var is consistent with http://12factor.net/config. OTOH clearly a config file is useful for some folks, though I'm not sure requiring it to be in the same dir as the script is the best.

[stuart-lang]

@alex From my perspective as a newcomer, I was weirded out putting a json object into an environment variable, I actually put a path to a config file, which obviously didn't work, but this was my expectation of how it would/should work.

There is nothing inherently wrong with putting json into a env variable, other than a 2048 char limit, but I would bet that a lot of people would assume this would live in a file, and what to check it into source control.

In the article you reference I think they mean holding individual config values in env vars, not entire structures, which is very common.

By the way, thanks for this project, it's awesome!

[alex]

I'm continuing to think about a way to improve this; the really nice thing
about keeping it self-contained in an env var is it means you can deploy
with the existing Dockerfile on platforms that let you set env vars, but
not touch the file system (think: anything like heroku :-))

On Fri, Mar 18, 2016 at 10:25 AM, stuart-lang notifications@github.com
wrote:

@alex https://github.com/alex From my perspective as a newcomer, I was
weirded out putting a json object into an environment variable, I actually
put a path to a config file, which obviously didn't work, but this was my
expectation of how it would/should work.

There is nothing inherently wrong with putting json into a env variable,
other than a 2048 char limit, but I would bet that a lot of people would
assume this would live in a file, and what to check it into source control.

In the article you reference I think they mean holding individual config
values in env vars, not entire structures, which is very common.

By the way, thanks for this project, it's awesome!

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[kageurufu]

I have an alternative fix for this in my branch, kageurufu/letsencrypt-aws@36a1d18. I haven't made a seperate pull request because it would include changes from my other request at #56

It still allows the current JSON is the environment variable, but also allows placing a file path there, or passing the --config command line argument, and finally if all else fails, defaults to config.json in the same directory as the script.

This should allow for far easier use, while still enabling more complicated deployments.

Personally, I run this script through cron, where passing a large json object in the environment is very messy, whereas now I can simply use

@daily /opt/letsencrypt-aws/venv/bin/python /opt/letsencrypt-aws/letsencrypt-aws.py update-certificates --config /opt/letsencrypt-aws/letsencrypt-aws.json