Process orchestrator for docker
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README.md

pups

Simple yaml based bootstrapper

Installation

Add this line to your application's Gemfile:

gem 'pups'

And then execute:

$ bundle

Or install it yourself as:

$ gem install pups

Usage

pups is a small library that allows you to automate the process of creating Unix images.

Example:

# somefile.yaml
params:
  hello: hello world

run:
  exec: /bin/bash -c 'echo $hello >>> hello'

Running: pups somefile.yaml will exectue the shell script resulting in a file called "hello" with the "hello world" contents

Features:

Execution

Run multiple commands in one path:

run:
  exec:
    cd: some/path
    cmd:
      - echo 1
      - echo 2

Run commands in the background (for services etc)

run:
  exec:
    cmd: /usr/bin/sshd
    background: true

Suppress exceptions on certain commands

run:
   exec:
     cmd: /test
     raise_on_faile: false

Replacements:

run:
  replace:
    filename: "/etc/redis/redis.conf"
    from: /^pidfile.*$/
    to: ""

Will substitued the regex with blank, removing the pidfile line

run:
  - replace:
      filename: "/etc/nginx/conf.d/discourse.conf"
      from: /upstream[^\}]+\}/m
      to: "upstream discourse {
        server 127.0.0.1:3000;
      }"

Multiline replace using regex

Merge yaml files:

home: /var/www/my_app
params:
  database_yml:
    production:
      username: discourse
      password: foo

run:
  - merge: $home/config/database.yml $database_yml

Will merge the yaml file with the inline contents

A common environment

env:
   MY_ENV: 1

All executions will get this environment set up

Contributing

  1. Fork it
  2. Create your feature branch (git checkout -b my-new-feature)
  3. Commit your changes (git commit -am 'Add some feature')
  4. Push to the branch (git push origin my-new-feature)
  5. Create new Pull Request