Update swift proxy example

This commit adds a usage example of creating
a swift proxy with keystone as the auth middleware
and a large number of configured middlewares.

This example encapsulates the latest and greatest
deployment example of swift proxy.

examples/proxy_keystone.pp

@@ -0,0 +1,68 @@
+# Example proxy using more middlewares:
+#  - Keystone: keystone + authtoken
+#  - Amazon S3 compatibility: swift3 + s3token
+#  - Rate limiting: ratelimit
+#  - Catch errors: catch_errors
+#
+# A keystone service user is required for swift, with admin role on thei
+# services tenant.
+# The swift service and endpoint must also be created in keystone.
+#
+
+$keystone_swift_user = 'swift'
+$keystone_swift_pass = 'ChangeMe'
+$keystone_services_tenant = 'services'
+$keystone_host = '127.0.0.1'
+$keystone_auth_port = 35357
+$keystone_auth_protocol = 'http'
+
+class { 'swift::proxy':
+  proxy_local_net_ip => $swift_local_net_ip,
+  pipeline           => [
+    'catch_errors',
+    'healthcheck',
+    'cache',
+    'ratelimit',
+    'swift3',
+    's3token',
+    'authtoken',
+    'keystone',
+    'proxy-server'
+  ],
+  account_autocreate => true,
+  require            => Class['swift::ringbuilder'],
+}
+
+class { [
+  'swift::proxy::catch_errors',
+  'swift::proxy::healthcheck',
+  'swift::proxy::cache',
+  'swift::proxy::swift3',
+]: }
+
+class { 'swift::proxy::ratelimit':
+  clock_accuracy         => 1000,
+  max_sleep_time_seconds => 60,
+  log_sleep_time_seconds => 0,
+  rate_buffer_seconds    => 5,
+  account_ratelimit      => 0
+}
+
+class { 'swift::proxy::s3token':
+  auth_host     => $keystone_host,
+  auth_port     => $keystone_auth_port,
+  auth_protocol => $keystone_auth_protocol,
+}
+
+class { 'swift::proxy::keystone':
+  operator_roles => ['admin', 'SwiftOperator'],
+}
+
+class { 'swift::proxy::authtoken':
+  admin_user        => $keystone_swift_user,
+  admin_tenant_name => $keystone_services_tenant,
+  admin_password    => $keystone_swift_pass,
+  auth_host         => $keystone_host,
+  auth_port         => $keystone_auth_port,
+  auth_protocol     => $keystone_auth_protocol,
+}