Enable the Docker builds via Vagrant.

.gitignore

@@ -1,5 +1,5 @@
 .DS_Store
-builds/*.box
+builds/
 http/
 output-parallels-iso/
 output-virtualbox-iso/

README.md

@@ -45,6 +45,8 @@ You have two choices for installing Packer.
 
 1. Otherwise, you can manually install it from <https://www.packer.io/downloads.html>.
 
+See “[Install Packer](https://www.packer.io/intro/getting-started/setup.html)” for more information.
+
 ## Building Vagrant Boxes
 
 ### Build everything
@@ -72,20 +74,14 @@ packer build --only=parallels-iso template.json
 
 ## Building the Docker Image
 
-1. Boot-up a Vagrant VM.
+1. Boot-up a Vagrant VM. This will automatically kick-off the Packer build for Docker.
 
    ```bash
    vagrant up
    ```
 
-2. Log into the VM.
-
-   ```bash
-   vagrant ssh
-   ```
-
-3. Run Packer from inside the VM to build the Docker image.
+2. Once it's done, terminate the Vagrant environment.
 
    ```bash
-   packer build template-docker.json
+   vagrant destroy
    ```

Vagrantfile

@@ -8,6 +8,7 @@ Vagrant.configure("2") do | config |
 
   # Box
   config.vm.box = "skyzyx/centos7"
+  config.vm.box_url = "file://./builds/centos7-x64-virtualbox.box"
   config.vm.boot_timeout = 120
 
   # Check for vbguest plugin
@@ -52,4 +53,11 @@ Vagrant.configure("2") do | config |
   end
 
   config.vm.provision :shell, inline: "yum -y install docker-engine"
+  config.vm.provision :shell, inline: "systemctl enable docker.service"
+  config.vm.provision :shell, inline: "systemctl start docker.service"
+  config.vm.provision :shell, inline: "wget -O /tmp/packer.zip https://releases.hashicorp.com/packer/0.10.1/packer_0.10.1_linux_amd64.zip"
+  config.vm.provision :shell, inline: "unzip -o -d /usr/local/bin/ /tmp/packer.zip"
+  config.vm.provision :shell, inline: "ln -fs /usr/local/bin/packer /usr/local/bin/packer-io"
+  config.vm.provision :shell, inline: "groupmems -g docker -a vagrant"
+  config.vm.provision :shell, inline: "cd /vagrant && packer-io build template-docker.json"
 end

template-docker.json

@@ -3,13 +3,13 @@
     {
       "type": "docker",
       "image": "centos:7.2.1511",
-      "export_path": "builds/centos7-x64-{{.Provider}}.tar"
+      "export_path": "builds/centos7-x64-docker.tar"
     }
   ],
   "provisioners": [
     {
       "type": "shell",
-      "execute_command": "echo 'vagrant' | sudo -S sh '{{.Path}}'",
+      "execute_command": "echo 'vagrant' | sh '{{.Path}}'",
       "override": {
         "docker": {
           "scripts": [

template.json

@@ -70,23 +70,6 @@
         ["set", "{{.Name}}", "--memsize", "512"],
         ["set", "{{.Name}}", "--cpus", "1"]
       ]
-    },
-    {
-      "type": "qemu",
-      "boot_command": [
-        "<tab> text ks=http://{{ .HTTPIP }}:{{ .HTTPPort }}/ks.cfg<enter><wait>"
-      ],
-      "boot_wait": "10s",
-      "disk_size": 20480,
-      "http_directory": "http",
-      "iso_url": "http://mirrors.kernel.org/centos/7.2.1511/isos/x86_64/CentOS-7-x86_64-Minimal-1511.iso",
-      "iso_checksum": "f90e4d28fa377669b2db16cbcb451fcb9a89d2460e3645993e30e137ac37d284",
-      "iso_checksum_type": "sha256",
-      "ssh_username": "vagrant",
-      "ssh_password": "vagrant",
-      "ssh_port": 22,
-      "ssh_wait_timeout": "10000s",
-      "shutdown_command": "history -c; echo '/sbin/halt -h -p' > /tmp/shutdown.sh; echo 'vagrant' | sudo -S sh '/tmp/shutdown.sh'"
     }
   ],
   "provisioners": [