Packer docker builder with ansible provisioner demo

Packer docker builder with ansible provisioner demo playbook.yml

---
- hosts: all
  sudo: true
  tasks:

    - name: install nginx for ubuntu
      apt: name=nginx state=latest
      when: ansible_distribution == 'Debian' or ansible_distribution == 'Ubuntu'

    - name: install nginx for centos
      dnf: name=nginx state=latest 
      when: ansible_distribution == 'CentOS' or ansible_distribution == 'Red Hat Enterprise Linux'

    - name: create sites-available directory ubuntu
      file:
        path: /etc/nginx/sites-available
        state: directory
      when: ansible_distribution == 'Debian' or ansible_distribution == 'Ubuntu'

    - name: create sites-enabled directory ubuntu
      file:
        path: /etc/nginx/sites-enabled
        state: directory
      when: ansible_distribution == 'Debian' or ansible_distribution == 'Ubuntu'

    - name: create the nginx config file ubuntu
      copy:
        dest: /etc/nginx/sites-available/default.cfg
        content: |
          server {
                 listen 80 default_server;
                 listen [::]:80 default_server;
                 root /html;
                 server_name _;
                 location / {
                         try_files $uri $uri/ =404;
                 }
          }
      when: ansible_distribution == 'Debian' or ansible_distribution == 'Ubuntu'

    - name: create symlink ubuntu
      file:
        src: /etc/nginx/sites-available/default.cfg
        dest: /etc/nginx/sites-enabled/default
        state: link
      when: ansible_distribution == 'Debian' or ansible_distribution == 'Ubuntu'

    - name: create the nginx site config file centos
      copy:
        dest: /etc/nginx/conf.d/default.conf
        content: |
          server {
                 listen 80 default_server;
                 listen [::]:80 default_server;
                 root /html;
                 server_name _;
                 location / {
                         try_files $uri $uri/ =404;
                 }
          }
      when: ansible_distribution == 'CentOS' or ansible_distribution == 'Red Hat Enterprise Linux'

    - name: create the nginx config file centos
      copy:
        dest: /etc/nginx/nginx.conf
        content: |
          user nginx;
          worker_processes auto;
          error_log /var/log/nginx/error.log;
          pid /run/nginx.pid;
          include /usr/share/nginx/modules/*.conf;
          events {
                 worker_connections 1024;
                  }
          http {
          log_format  main  '$remote_addr - $remote_user [$time_local] "$request" '
                      '$status $body_bytes_sent "$http_referer" '
                      '"$http_user_agent" "$http_x_forwarded_for"';
          access_log  /var/log/nginx/access.log  main;
          sendfile            on;
          tcp_nopush          on;
          tcp_nodelay         on;
          keepalive_timeout   65;
          types_hash_max_size 2048;
          include             /etc/nginx/mime.types;
          default_type        application/octet-stream;
          include /etc/nginx/conf.d/*.conf;
          } 
      when: ansible_distribution == 'CentOS' or ansible_distribution == 'Red Hat Enterprise Linux'

    - name: restart nginx ubuntu
      service:
        name: nginx
        state: restarted
      when: ansible_distribution == 'Debian' or ansible_distribution == 'Ubuntu'

    - name: restart nginx centos
      systemd:
        name: nginx
        state: restarted
      when: ansible_distribution == 'CentOS' or ansible_distribution == 'Red Hat Enterprise Linux'

    - name: enable and start nginx on ubuntu
      service: 
          name: nginx
          enabled: yes
          state: started
      when: ansible_distribution == 'Debian' or ansible_distribution == 'Ubuntu'

    - name: enable and start nginx on centos
      systemd:
          name: nginx
          enabled: yes
          state: started
      when: ansible_distribution == 'CentOS' or ansible_distribution == 'Red Hat Enterprise Linux'

Packer docker builder with ansible provisioner demo ubuntu_or_centos_nginx.json

{
  "variables": {
    "ansible_host": "default",
    "ansible_connection": "docker"
  },
  "builders": [{
    "type": "docker",
    "name": "ubuntu",
    "image": "ubuntu:latest",
    "commit": "true",
    "run_command": [
    "-d",
    "-i",
    "-t",
    "--name",
    "{{user `ansible_host`}}",
    "{{.Image}}",
    "/bin/bash"
    ],
    "changes": [
      "CMD [\"nginx\", \"-g\", \"daemon off;\"]"
    ]
  },{
    "type": "docker",
    "name": "centos",
    "image": "centos:latest",
    "commit": "true",
    "run_command": [
    "-d",
    "-i",
    "-t",
    "--name",
    "{{user `ansible_host`}}",
    "{{.Image}}",
    "/bin/bash"
    ],
    "changes": [
      "CMD [\"nginx\", \"-g\", \"daemon off;\"]"
    ]
  }],
  "provisioners": [
    {
      "type": "shell",
      "only": ["ubuntu"],
      "inline": [
        "apt-get update",
        "apt-get install python -yq"
      ]
    },
    {
      "type": "shell",
      "only": ["centos"],
      "inline": [
        "yum update -y",
        "yum install python36 -y",
        "ln -s /usr/bin/python3 /usr/bin/python",
        "curl https://raw.githubusercontent.com/gdraheim/docker-systemctl-replacement/master/files/docker/systemctl.py > /usr/bin/systemctl",
        "chmod +x /usr/bin/systemctl"
      ]
    },
    {
      "type": "ansible",
      "user": "root",
      "playbook_file": "./playbook.yml",
      "extra_arguments": [
        "--extra-vars",
        "ansible_host={{user `ansible_host`}} ansible_connection={{user `ansible_connection`}}"
      ]
    }
  ],
  "post-processors": [
    [
      {
        "type": "docker-tag",
        "repository": "csiens/nginx-ubuntu",
        "tag": "latest",
        "only": ["ubuntu"]
      },
      {
        "type": "docker-tag",
        "repository": "csiens/nginx-centos",
        "tag": "latest",
        "only": ["centos"]
      },
      {
        "type": "docker-push",
        "login": "true",
        "login_username": "csiens",
        "login_password": ""
      }
    ]
  ]
}