Docker und Docker-Compose

Squashed commit of the following:

commit ce55b800
Author: Benedikt Wegmann <benedikt.wegmann@gwdg.de>
Date:   Thu Jun 23 10:56:26 2016 +0200

    docker: FIX

commit 422cfc9f
Author: Benedikt Wegmann <benedikt.wegmann@gwdg.de>
Date:   Thu Jun 23 10:55:41 2016 +0200

    docker: FIX

commit a42c828f
Author: Benedikt Wegmann <benedikt.wegmann@gwdg.de>
Date:   Thu Jun 23 10:53:42 2016 +0200

    docker: FIX

commit eb00a72b
Author: Benedikt Wegmann <benedikt.wegmann@gwdg.de>
Date:   Thu Jun 23 10:51:47 2016 +0200

    docker: FIX

commit 210c0972
Author: Benedikt Wegmann <benedikt.wegmann@gwdg.de>
Date:   Thu Jun 23 10:46:22 2016 +0200

    docker

manifests/docker.pp

+class ubuntu_server::docker {
+    File{
+        owner => 'root',
+        group => 'root',
+        mode => 644,
+    }
+
+    Exec{
+        path => $path,
+    }
+
+    exec{'docker-apt-repo':
+        command => "apt-key adv --keyserver hkp://p80.pool.sks-keyservers.net:80 --recv-keys 58118E89F3A912897C070ADBF76221572C52609D",
+        unless => "apt-key list | grep -q 2C52609D",
+        notify => Exec['apt-get-update'],
+    }
+
+    exec{'apt-get-update':
+        command => 'apt-get update',
+    }
+
+    file{'/etc/apt/sources.list.d/docker.list':
+        ensure => present,
+        content => "deb http://apt.dockerproject.org/repo ubuntu-trusty main",
+        notify => Exec['apt-get-update'],
+    }
+
+    package{'lxc-docker':
+        ensure => purged,
+        before => Package['docker-engine'],
+    }
+
+    package{'docker-engine':
+        ensure => present,
+        require => [Exec['docker-apt-repo'],File['/etc/apt/sources.list.d/docker.list'],Exec['apt-get-update']],
+    }
+
+    service{'docker':
+        ensure => running,
+        require => Package['docker-engine'],
+    }
+
+    exec{'docker-compose':
+        command => 'curl -L https://github.com/docker/compose/releases/download/1.6.2/docker-compose-$(uname -s)-$(uname -m) > /usr/local/bin/docker-compose',
+        creates => '/usr/local/bin/docker-compose',
+    }
+
+    file{'/usr/local/bin/docker-compose':
+        mode => 750,
+        require => Exec['docker-compose'],
+    }
+
+}