create example repo for ansible/molecule#1646

ansible.cfg

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+[defaults]
+strategy_plugins = plugins/mitogen/ansible_mitogen/plugins/strategy
+stdout_callback=debug
+stderr_callback=debug
+library        = /opt/ansible/modules/library
+remote_tmp     = $HOME/.ansible/tmp
+pattern        = *
+forks          = 15
+poll_interval  = 15
+become_user      = root
+transport      = smart
+remote_port    = 22
+gathering = implicit
+roles_path    = roles
+host_key_checking = False
+timeout = 10
+jinja2_extensions = jinja2.ext.do
+ansible_managed = Ansible managed
+display_skipped_hosts = False
+deprecation_warnings = True
+action_plugins     = /usr/share/ansible_plugins/action_plugins
+connection_plugins = /usr/share/ansible_plugins/connection_plugins
+lookup_plugins     = /usr/share/ansible_plugins/lookup_plugins
+vars_plugins       = /usr/share/ansible_plugins/vars_plugins
+filter_plugins     = ./filter_plugins/filter
+callback_whitelist = profile_tasks
+nocows = 1
+retry_files_enabled = False
+[ssh_connection]
+control_path = %(directory)s/ssh-%%h
+scp_if_ssh = True
+[inventory]
+unparsed_is_failed     = True

requirements.txt

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+molecule == 2.19
+docker
+redis

roles/.yamllint

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+extends: default
+
+rules:
+  braces:
+    max-spaces-inside: 1
+    level: error
+  brackets:
+    max-spaces-inside: 1
+    level: error
+  colons:
+    max-spaces-before: 0
+    max-spaces-after: 1
+  line-length: disable
+  truthy: disable
+  comments:
+    require-starting-space: true
+  comments-indentation: disable
+  hyphens:
+    max-spaces-after: 1
+  indentation:
+    indent-sequences: consistent
+  new-line-at-end-of-file: enable

roles/generic_loadbalancer/.yamllint

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+extends: default
+
+rules:
+  braces:
+    max-spaces-inside: 1
+    level: error
+  brackets:
+    max-spaces-inside: 1
+    level: error
+  colons:
+    max-spaces-before: 0
+    max-spaces-after: 1
+  line-length: disable
+  truthy: disable
+  comments:
+    require-starting-space: true
+  comments-indentation: disable
+  hyphens:
+    max-spaces-after: 1
+  indentation:
+    indent-sequences: consistent
+  new-line-at-end-of-file: enable
+

roles/generic_loadbalancer/defaults/main.yml

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+---
+# defaults file for generic_loadbalancer
+generic_loadbalancer:
+  vip:
+  - 10.10.10.10
+  - 10.10.10.11

roles/generic_loadbalancer/handlers/main.yml

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+---
+# handlers file for generic_loadbalancer
+
+- name: restart keepalived
+  systemd:
+    name: keepalived
+    state: restarted

roles/generic_loadbalancer/meta/main.yml

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+---
+dependencies:
+  - { role: nginx }

roles/generic_loadbalancer/molecule/default/Dockerfile.j2

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+FROM {{ item.image }}
+
+RUN /bin/sh -c 'if [ -x "$(command -v apt-get)" ]; then apt-get update && apt-get upgrade -y && apt-get install -y python sudo bash; fi'
+RUN /bin/sh -c 'if [ -x "$(command -v yum)" ]; then touch /var/lib/rpm/* && yum makecache fast && yum update -y && yum install -y python sudo yum-plugin-ovl bash && sed -i 's/plugins=0/plugins=1/g' /etc/yum.conf; fi'
+RUN /bin/sh -c 'if [ -x "$(command -v zypper)" ]; then zypper refresh && zypper update -y && zypper install -y python sudo bash; fi'
+RUN /bin/sh -c 'if [ -x "$(command -v apk)" ]; then apk update && apk add python sudo bash; fi'
+RUN /bin/sh -c 'if [ -x "$(command -v pacman)" ]; then pacman --sync --noconfirm --refresh python2 bash; fi'
+RUN /bin/sh -c 'if [ -x "$(command -v dnf)" ]; then dnf makecache fast; dnf --assumeyes install python python-devel python2-dnf bash; fi'
+RUN /bin/sh -c 'if [ -x "$(command -v emerge)" ]; then emerge --ask n =dev-lang/python-2\* gentoolkit; fi'

roles/generic_loadbalancer/molecule/default/INSTALL.rst

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+*******
+Install
+*******
+
+This set of playbooks have specific dependencies on Ansible due to the modules
+being used.
+
+Requirements
+============
+
+* Ansible 2.2
+* Docker Engine
+* docker-py
+
+Install OS dependencies on CentOS 7
+
+.. code-block:: bash
+
+  $ sudo yum install -y epel-release
+  $ sudo yum install -y gcc python-pip python-devel openssl-devel
+  # If installing Molecule from source.
+  $ sudo yum install libffi-devel git
+
+Install OS dependencies on Ubuntu 16.x
+
+.. code-block:: bash
+
+  $ sudo apt-get update
+  $ sudo apt-get install -y python-pip libssl-dev docker-engine
+  # If installing Molecule from source.
+  $ sudo apt-get install -y libffi-dev git
+
+Install OS dependencies on Mac OS
+
+.. code-block:: bash
+
+  $ brew install python
+  $ brew install git
+
+Install using pip:
+
+.. code-block:: bash
+
+  $ sudo pip install ansible
+  $ sudo pip install docker-py
+  $ sudo pip install molecule --pre

roles/generic_loadbalancer/molecule/default/create.yml

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+---
+- name: Create
+  hosts: localhost
+  connection: local
+  gather_facts: false
+  no_log: "{{ not (lookup('env', 'MOLECULE_DEBUG') | bool or molecule_yml.provisioner.log|default(false) | bool) }}"
+  tasks:
+    - name: Log into a Docker registry
+      docker_login:
+        username: "{{ item.registry.credentials.username }}"
+        password: "{{ item.registry.credentials.password }}"
+        email: "{{ item.registry.credentials.email | default(omit) }}"
+        registry: "{{ item.registry.url }}"
+        docker_host: "{{ item.docker_host | default(lookup('env', 'DOCKER_HOST') or 'unix://var/run/docker.sock') }}"
+      with_items: "{{ molecule_yml.platforms }}"
+      when:
+        - item.registry is defined
+        - item.registry.credentials is defined
+        - item.registry.credentials.username is defined
+
+    - name: Create Dockerfiles from image names
+      template:
+        src: "{{ molecule_scenario_directory }}/Dockerfile.j2"
+        dest: "{{ molecule_ephemeral_directory }}/Dockerfile_{{ item.image | regex_replace('[^a-zA-Z0-9_]', '_') }}"
+      with_items: "{{ molecule_yml.platforms }}"
+      when: not item.pre_build_image | default(false)
+      register: platforms
+
+    - name: Discover local Docker images
+      docker_image_facts:
+        name: "molecule_local/{{ item.item.name }}"
+        docker_host: "{{ item.item.docker_host | default(lookup('env', 'DOCKER_HOST') or 'unix://var/run/docker.sock') }}"
+      with_items: "{{ platforms.results }}"
+      when: not item.pre_build_image | default(false)
+      register: docker_images
+
+    - name: Build an Ansible compatible image
+      docker_image:
+        path: "{{ molecule_ephemeral_directory }}"
+        name: "molecule_local/{{ item.item.image }}"
+        docker_host: "{{ item.item.docker_host | default(lookup('env', 'DOCKER_HOST') or 'unix://var/run/docker.sock') }}"
+        dockerfile: "{{ item.item.dockerfile | default(item.invocation.module_args.dest) }}"
+        force: "{{ item.item.force | default(true) }}"
+        pull: "{{ item.item.pull | default(omit) }}"
+      with_items: "{{ platforms.results }}"
+      when:
+        - platforms.changed or docker_images.results | map(attribute='images') | select('equalto', []) | list | count >= 0
+        - not item.item.pre_build_image | default(false)
+
+    - name: Create docker network(s)
+      docker_network:
+        name: "{{ item }}"
+        docker_host: "{{ item.docker_host | default(lookup('env', 'DOCKER_HOST') or 'unix://var/run/docker.sock') }}"
+        state: present
+      with_items: "{{ molecule_yml.platforms | molecule_get_docker_networks }}"
+
+    - name: Create molecule instance(s)
+      docker_container:
+        name: "{{ item.name }}"
+        docker_host: "{{ item.docker_host | default(lookup('env', 'DOCKER_HOST') or 'unix://var/run/docker.sock') }}"
+        hostname: "{{ item.hostname | default(item.name) }}"
+        image: "{{ item.pre_build_image | default(false) | ternary('', 'molecule_local/') }}{{ item.image }}"
+        state: started
+        recreate: false
+        log_driver: json-file
+        command: "{{ item.command | default('bash -c \"while true; do sleep 10000; done\"') }}"
+        privileged: "{{ item.privileged | default(omit) }}"
+        security_opts: "{{ item.security_opts | default(omit) }}"
+        volumes: "{{ item.volumes | default(omit) }}"
+        tmpfs: "{{ item.tmpfs | default(omit) }}"
+        capabilities: "{{ item.capabilities | default(omit) }}"
+        sysctls: "{{ item.sysctls| default(omit) }}"
+        exposed_ports: "{{ item.exposed_ports | default(omit) }}"
+        published_ports: "{{ item.published_ports | default(omit) }}"
+        ulimits: "{{ item.ulimits | default(omit) }}"
+        networks: "{{ item.networks | default(omit) }}"
+        network_mode: "{{ item.network_mode | default(omit) }}"
+        dns_servers: "{{ item.dns_servers | default(omit) }}"
+        env: "{{ item.env | default(omit) }}"
+        restart_policy: "{{ item.restart_policy | default(omit) }}"
+        restart_retries: "{{ item.restart_retries | default(omit) }}"
+      register: server
+      with_items: "{{ molecule_yml.platforms }}"
+      async: 7200
+      poll: 0
+
+    - name: Wait for instance(s) creation to complete
+      async_status:
+        jid: "{{ item.ansible_job_id }}"
+      register: docker_jobs
+      until: docker_jobs.finished
+      retries: 300
+      with_items: "{{ server.results }}"

roles/generic_loadbalancer/molecule/default/molecule.yml

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+---
+dependency:
+  name: gilt
+driver:
+  name: docker
+lint:
+  name: yamllint
+  options:
+    config-file: ../.yamllint
+platforms:
+  - name: glb-001.example.com
+    image: centos:latest
+    command: /sbin/init
+    privileged: true
+    volumes:
+      - /sys/fs/cgroup:/sys/fs/cgroup:ro
+    capabilities:
+      - SYS_ADMIN
+      - NET_ADMIN
+      - NET_BIND_SERVICE
+    sysctls:
+      net.ipv4.ip_nonlocal_bind: 1
+    groups:
+      - generic_loadbalancer
+  - name: glb-002.example.com
+    image: centos:latest
+    command: /sbin/init
+    privileged: true
+    volumes:
+      - /sys/fs/cgroup:/sys/fs/cgroup:ro
+    capabilities:
+      - SYS_ADMIN
+      - NET_ADMIN
+      - NET_BIND_SERVICE
+    sysctls:
+      net.ipv4.ip_nonlocal_bind: 1
+    groups:
+      - generic_loadbalancer
+provisioner:
+  name: ansible
+  config_options:
+    defaults:
+      jinja2_extensions: jinja2.ext.do
+      callback_whitelist: profile_tasks
+  lint:
+    name: ansible-lint
+  playbooks:
+    side_effect: side_effect.yml
+scenario:
+  name: default
+verifier:
+  name: goss
+  lint:
+    name: yamllint
+    options:
+      config-file: ../.yamllint

roles/generic_loadbalancer/molecule/default/playbook.yml

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+---
+- name: Converge
+  hosts: generic_loadbalancer
+  roles:
+    - role: generic_loadbalancer

roles/generic_loadbalancer/molecule/default/prepare.yml

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+---
+- name: Prepare
+  hosts: generic_loadbalancer
+  gather_facts: False
+  tasks:
+    - name: install dependencies
+      yum:
+        name: "{{ item }}"
+        state: present
+      with_items:
+        - iproute
+        - sysvinit-tools
+        - epel-release
+
+    - name: create facts dir
+      file:
+        path: /etc/ansible/facts.d
+        state: directory
+
+    - name: set fact
+      copy:
+        content: |
+          [run]
+          true = 1
+        dest: /etc/ansible/facts.d/molecule.fact

roles/generic_loadbalancer/molecule/default/side_effect.yml

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+---
+- name: kill nginx on glb-001
+  gather_facts: false
+  hosts:
+    - glb-001.example.com
+  become: true
+  tasks:
+    - name: stop nginx
+      service:
+        name: nginx
+        state: stopped
+    - name: wait for keepalived to move IP
+      shell: sleep 5

roles/generic_loadbalancer/molecule/default/tests/test_default.yml

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+---
+package:
+  nginx:
+    installed: true
+  keepalived:
+    installed: true
+user:
+  nginx:
+    exists: true
+    groups:
+    - nginx
+    home: /var/lib/nginx
+    shell: /sbin/nologin
+group:
+  nginx:
+    exists: true

roles/generic_loadbalancer/molecule/default/tests/test_host_glb-001.example.com.yml

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+---
+service:
+  nginx:
+    enabled: true
+    running: false
+port:
+  tcp:80:
+    listening: false
+
+eth0:
+  exists: true
+  addrs: []