First comit.

.gitignore

+.vagrant
+*.swp
+*.swo
+*~
+~*

Dockerfile

+FROM phusion/baseimage
+RUN apt-get update
+RUN apt-get install -yf vim-nox git python-dev python-pip
+RUN pip install ansible
+RUN rm -f /etc/service/sshd/down
+RUN /etc/my_init.d/00_regen_ssh_host_keys.sh
+COPY ./ /root
+EXPOSE 22
+CMD /sbin/my_init --enable-insecure-key

README.rst

+detect-container
+================
+
+For a while now contaner detection inside Ansible worked only when running on
+bare metal and not inside a VM (like an AWS instance). This repository is a test
+for a tool to detect containerization. However with commit
+https://github.com/ansible/ansible/commit/45f98007540ac9ac1694a8505e2ad763bf135d57
+to Ansible this is no longer an issue, so this repository and tool is no longer
+maitained (the detection works AFAIK, but the testing environment is not
+finished).
+
+License
+-------
+
+This code is under the public domain.

Vagrantfile

+# -*- mode: ruby -*-
+# vi: set ft=ruby :
+Vagrant.configure(2) do |config|
+  config.vm.define "debian" do |debian|
+    debian.vm.box = "debian/jessie64"
+  end
+  config.vm.define "ubuntu" do |ubuntu|
+    ubuntu.vm.box = "ubuntu/trusty64"
+  end
+  config.vm.provision "ansible" do |ansible|
+    ansible.playbook = "playbook.yml"
+    ansible.sudo = true
+  end
+end

ansible.cfg

+[default]
+inventory = inventory

detect-container.py

+#!/usr/bin/env python2
+'''
+Detection if running in a container and if so, which.
+Must run as root.
+'''
+from __future__ import (absolute_import, division,
+                        print_function, unicode_literals)
+import os
+
+
+def detect_nspawn():
+    raise NotImplemented
+
+
+def detect_lxc():
+    try:
+        env = open('/proc/1/environ', 'r').read()
+        return env.find('container=lxc') > -1
+    except:
+        return False
+
+
+def detect_docker():
+    return os.path.isfile('''/.dockerenv''')
+
+
+if __name__ == '__main__':
+    if detect_lxc():
+        print('lxc')
+    elif detect_docker():
+        print('docker')
+#    elif detect_nspawn:
+#        print('nspawn')
+    else:
+        print('None')

insecure_key

+-----BEGIN RSA PRIVATE KEY-----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+-----END RSA PRIVATE KEY-----

inventory

+[localhost]
+localhost ansible_connection=local
+docker ansible_ssh_host=127.0.0.1 ansible_ssh_port=2222 ansible_ssh_private_key_file=insecure_key ansible_ssh_user=root
+lxc ansible_ssh_host=10.0.3.78 ansible_ssh_user=ubuntu ansible_ssh_private_key=~/.ssh/id_rsa ansible_become=True ansible_become_user=root ansibe_become_method=sudo ansible_become_pass=ubuntu

playbook.yml

+---
+- hosts:
+    - all
+  tasks:
+    - name: apt install
+      apt:
+          name: '{{ item }}'
+          state: present
+          update_cache: yes
+          cache_valid_time: 3600
+      with_items:
+          - apt-transport-https
+          - ca-certificates
+          - vim-nox
+          - python-dev
+          - python-pip
+          - git
+          - lxc
+          - build-essential
+    - name: Add Docker repo key
+      apt_key:
+          keyserver: hkp://p80.pool.sks-keyservers.net:80
+          id: 58118E89F3A912897C070ADBF76221572C52609D
+          state: present
+    - name: Add Docker repo
+      apt_repository:
+          repo: 'deb https://apt.dockerproject.org/repo {{ ansible_distribution|lower }}-{{ ansible_distribution_release }} main'
+          state: present
+          update_cache: yes
+    - name: Install Docker
+      apt:
+          name: docker-engine
+          state: present
+          update_cache: yes
+          cache_valid_time: 3600
+    - name: pip install
+      pip:
+          name: '{{ item }}'
+          state: present
+      with_items:
+          - ansible

requirements.txt

+ansible>=1.9.1