packer.json

{
    "variables": {
        "platform_name": "CentOS",
        "platform_version": "7"
    },
    "builders": [{
        "type": "amazon-ebs",
        "name": "HVM AMI builder",
        "region": "us-west-2",
        "source_ami": "ami-0c2aba6c",
        "instance_type": "t2.nano",
        "ssh_username": "centos",
        "ami_name": "CentOS 7 - 1703_01 (built on {{isotime \"20060102150405\"}})",
        "tags": {
            "platform_name": "{{user `platform_name`}}",
            "platform_version": "{{user `platform_version`}}"
        }
    }],
    "provisioners": [{
        "type": "file",
        "source": "builder",
        "destination": "/tmp/"
    }, {
        "type": "shell",
        "execute_command": "chmod +x {{ .Path }}; {{ .Vars }}; sudo {{ .Path }}",
        "scripts": [
            "builder/install.sh"
        ]
    }, {
        "type": "ansible-local",
        "playbook_file": "ansible/plays/common.yml",
        "playbook_dir": "ansible/",
        "role_paths": [
            "ansible/roles"
        ]
    }]
}


$ cat builder/install.sh
#!/bin/bash

export PATH=$PATH:/bin:/usr/bin:/usr/local/bin

yum update -y
yum upgrade -y

yum -y install epel-release
yum -y install jq awscli nc tcpdump libselinux-python python-pip bind-utils nmap screen tmux iotop facter rubygem-json python2-virtualenv python3-virtualenv
pip install prettytable ansible>=2.4.1.0
groupadd -g 5000 octane
useradd -g 5000 -s /bin/bash -d /home/octane -m octane -u 5000
# ensure the overlay module is loaded - required for docker
echo overlay > /etc/modules-load.d/overlay.conf