config-ninja 1.0.0b2

Use special ninja powers to manage system configurations 🥷

Config Ninja 🥷

Similar to confd, manage your system configuration files by populating Jinja2 templates with data from a remote provider.

Installation

To install using pip:

pip install config-ninja

Quick Start

To demonstrate the mechanics locally:

1. create a settings file for config-ninja:

   cat <<EOF >config-ninja-settings.yaml
   CONFIG_NINJA_OBJECTS:
     example-0:
       dest:
         format: json
         path: ./.local/config.json
       source:
         backend: local
         format: toml
         init:
           kwargs:
             path: ./.local/config.toml
   EOF
   

2. start config-ninja in monitor mode:

   config-ninja monitor
   

3. in a separate shell, create the config.toml:

   cat <<EOF >./.local/config.toml
   [example-0]
   a = "first value"
   b = "second value
   EOF
   

4. inspect the generated settings.json:

   cat settings.json
   

   {
     "example-0": {
       "a": "first value",
       "b": "second value"
     }
   }
   

Chances are, you'll want to update the config-ninja-settings.yaml file to use a remote backend (instead of local). See config_ninja.contrib for a list of supported config providers.

Configuration Architecture

The config-ninja agent monitors the backend source for changes. When the source data is changed, the agent updates the local configuration file with the new data:

sequenceDiagram
    loop polling
       config-ninja->>backend: query for changes
    end

    backend->>+config-ninja: [backend changed] fetch config
    config-ninja->>-filesystem: write updated configuration file