Purpose

AUTOMATE All THE THINGS

Atomic Host

Build Docker Image & Container

Ansible Automation

Cockpit

Remote

Manager

Project Atomic

Light weight Container based OS.
Less number of Packages to maintain.
No more half way upgrade of system.

Docker

Isolated.
Portable.
Lightweight.
Continuous Deployment.

Blah blah blah...................

Ansible

Remote Server Management.
Automate all the things.
Perform the Repetitive task.

COCKPIT

Administrate Linux Server via Web Browser.
Start and Stop services easily.
Manage Containers running on Host.

Show me code !!!

>>>

$ mkdir flask-helloworld
$ cd flask-helloworld
$ mkdir -p ansible flask-helloworld flask-helloworld/static flask-helloworld/templates
$ touch Dockerfile ansible/{main.yml,inventory,ansible,cfg}
$ touch flask-helloworld/hello-world.py flask-helloworld/static/style.css 
$ touch flask-helloworld/templates/{index,master}.html
$ cd ..
$ tree flask-helloworld
flask-helloworld/
├── ansible
│   ├── ansible.cfg
│   ├── inventory
│   └── main.yml
├── Dockerfile
├── flask-helloworld
│   ├── hello_world.py
│   ├── static
│   │   └── style.css
│   └── templates
│       ├── index.html
│       └── master.html

"""
hello-world.py
"""


from flask import Flask, render_template

APP = Flask(__name__)

@APP.route('/')
def index():
    return render_template('index.html')


if __name__ == '__main__':
    APP.run(debug=True, host='0.0.0.0')

<!-- master.html -->

<!doctype html>
<html>
<head>
    {% block head %}
    <title>{% block title %}{% endblock %}</title>
    {% endblock %}
    <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/css/bootstrap.min.css" integrity="sha384-1q8mTJOASx8j1Au+a5WDVnPi2lkFfwwEAa8hDDdjZlpLegxhjVME1fgjWPGmkzs7" crossorigin="anonymous">
    <link href="https://maxcdn.bootstrapcdn.com/font-awesome/4.6.3/css/font-awesome.min.css" rel="stylesheet" integrity="sha384-T8Gy5hrqNKT+hzMclPo118YTQO6cYprQmhrYwIiQ/3axmI1hQomh7Ud2hPOy8SP1" crossorigin="anonymous">
    <link rel="stylesheet" href="{{ url_for('static', filename='style.css') }}">
    <link href='http://fonts.googleapis.com/css?family=Lato:400,700' rel='stylesheet' type='text/css'>
</head>
<body>

  <div id="container">
    {% block content %}
    {% endblock %}
  </div>

</body>
</html>

<!-- index.html -->

{% extends "master.html" %}

{% block title %}Welcome to Flask App{% endblock %}
{% block content %}

    <div class="description">
      <p>Hello World</p>
    </div>
{% endblock %}

/* style.css */



body {
  background: #F8A434;
  font-family: 'Lato', sans-serif;
  color: #FDFCFB;
  text-align: center;
  position: relative;
  bottom: 35px;
  top: 65px;
}
.description {
  position: relative;
  top: 55px;
  font-size: 50px;
  letter-spacing: 1.5px;
  line-height: 1.3em;
  margin: -2px 0 45px;
}

# Dockerfile



FROM fedora
MAINTAINER Trishna Guha<tguha@redhat.com>

RUN dnf -y update && dnf -y install python-flask python-jinja2 && dnf clean all

RUN mkdir -p /app

COPY source/ /app/
WORKDIR /app

ENTRYPOINT ["python"]
CMD ["hello-world.py"]

# ansible/ansible.cfg


[defaults]
inventory=inventory
remote_user=<USER>

# USER = fedora [If you are going to use Fedora Atomic host]

[privilege_escalation]
become_method=sudo
become_user=root



# ansible/inventory


[atomic]
<IP_ADDRESS_OF_HOST> ansible_ssh_private_key_file=<'PRIVATE_KEY_FILE'>

# ansible/main.yml

---
- name: Deploy Flask App
  hosts: atomic
  become: yes

  vars:
    src_dir: [Source Directory]       # /path/to/src_dir of the current host.
    dest_dir: [Destination Directory] # /path/to/dest_dir of the remote atomic host.

    # src_dir = /home/tguha/DevConf2017/flask-helloworld
    # dest_dir = /var/home/fedora/projects/flask-app

  tasks:
    - name: Create Destination Directory
      file:
       path: "{{ dest_dir }}/source"
       state: directory
       recurse: yes

    - name: Copy Dockerfile to host
      copy:
       src: "{{ src_dir }}/Dockerfile"
       dest: "{{ dest_dir }}"

    - name: Copy Application to host:
      copy:
       src: "{{ src_dir }}/flask-helloworld/"
       dest: "{{ dest_dir }}/source/"

    - name: Build Docker Image
      command: docker build --rm -t fedora/flask-app:test -f "{{ dest_dir }}/Dockerfile" "{{ dest_dir }}"

    - name: Run Docker Container
      command: docker run -d --name helloworld -p 5000:5000 fedora/flask-app:test

    - name: Start Cockpit Service
      command: /usr/bin/atomic run fedora/cockpitws