rconfig

rconfig helps bring configuration, stored remotely on a Consul server, to your application.

Installation

Install the latest version with:

pip3 install -U python-rconfig

For command-line support, use the CLI option during installation:

pip3 install -U "python-rconfig[cli]"

For command-line and yaml support:

pip3 install -U "python-rconfig[cli,yaml]"

Usage

First off all rconfig expects that you have the following key structure on the consul server:

<root-key>
    |____<common-config-key>
    |          |
    |          |___<some-env-key>
    |          |           |_____<key-value>
    |          |           |_____<key-value>
    |          |
    |          |___<another-env-key>
    |                      |_____<key-value>
    |                      |_____<key-value>
    |____<app-config-key>
               |
               |___<some-env-key>
               |           |_____<key-value>
               |           |_____<key-value>
               |
               |___<another-env-key>
                           |_____<key-value>
                           |_____<key-value>

Here root key stands for the name of the project when some have multiple applications that grouped under some kind of common purpose (often when talk about microservices). Under common configuration key, you should store configurations that common to all your applications in the project, in this case, it's much easier to change the config in one place than go to multiple.

Command-line Interface

CLI offers you an ability to load config from Consul (within a few ways) without a need of changing application code.

Usage: rconfig [OPTIONS] COMMAND [ARGS]...

Options:
  -h, --host TEXT     Host of a consul server  [required]
  -a, --access TEXT   Access key for a consul server  [required]
  -p, --port INTEGER  Port of consul server  [default: 8500]
  -k, --key TEXT      Consul key  [required]
  --help              Show this message and exit.

Commands:
  export  Print out bash command export for all found config
  list    Show all config for given keys

Let's look at few examples.

<your-awesome-app>
    |____<prod>
           |___<LOG_LEVEL -> "WARNING">
           |___<LOG_FILE_HANDLER -> 1>

To load prod config of you-awesome-app, issue:

$ rconfig -h localhost -a access-key -k 'your-awesome-app/prod' list

{'LOG_LEVEL': 'WARNING',
 'LOG_FILE_HANDLER': 1}

To export config to different formats, use:

Bash:

$ rconfig -h localhost -a access-key -k 'your-awesome-app/prod' export -f bash

export LOG_LEVEL='WARNING'
export LOG_FILE_HANDLER='1'

$ rconfig -h localhost -a access-key -k 'your-awesome-app/prod' export -f bash:inline

export LOG_LEVEL='WARNING' LOG_FILE_HANDLER='1'

Yaml:

$ rconfig -h localhost -a access-key -k 'your-awesome-app/prod' export -f yaml

LOG_LEVEL: WARNING
LOG_FILE_HANDLER: 1

Json:

$ rconfig -h localhost -a access-key -k 'your-awesome-app/prod' export -f json

{"LOG_LEVEL": "WARNING", "LOG_FILE_HANDLER": 1}

$ rconfig -h localhost -a access-key -k 'your-awesome-app/prod' export -f json:pretty

{
    "LOG_LEVEL": "WARNING",
    "LOG_FILE_HANDLER": 1
}