Add docker module

docker/manifests/init.pp

@@ -0,0 +1,46 @@
+# Install Docker.
+#
+class docker {
+
+  if ! ($::operatingsystem in ["CentOS","RedHat"] and versioncmp($::operatingsystemrelease, "7") > 0) {
+    fail('Docker is supported only on EL 7')
+  }
+
+  package { 'docker':
+    ensure => installed,
+  } ->
+  service { 'docker':
+    ensure  => running,
+    enable  => true,
+  }
+
+  python::pip::install { 'docker-compose':
+    ensure => '1.8.1',
+  }
+
+}
+
+
+# Load docker image.
+#
+define docker::image($source) {
+
+  require docker
+  require gnu::tar
+
+  file { "/usr/local/src/${name}":
+    ensure => present,
+    mode   => '0644',
+    owner  => 'root',
+    group  => 'wheel',
+    source => $source,
+  }
+
+  exec { "docker-load-${name}":
+    refreshonly => true,
+    path        => '/bin:/usr/bin:/usr/local/bin:/sbin:/usr/sbin:/usr/local/sbin',
+    command     => "/bin/sh -c 'umask 022; docker load --input /usr/local/src/${name}'",
+    subscribe   => File["/usr/local/src/${name}"],
+  }
+
+}