Add support for DLO configuration.

New class swift::proxy::dlo for DLO configuration.
Add acceptance tests
Add docs to README

Change-Id: Ie209e494d7affd72c3fea3f2cc3459b91d7c6765

Author: adidenko

README.md

@@ -126,6 +126,28 @@ This is the ip that the proxy service will bind to when it starts.
 ####`port`
 The port for which the proxy service will bind to when it starts.
 
+### Class swift::proxy::dlo
+
+Configures [DLO middleware](http://docs.openstack.org/developer/swift/middleware.html#module-swift.common.middleware.dlo) for swift proxy.
+
+```puppet
+class { '::swift::proxy::dlo':
+  rate_limit_after_segment    => '10',
+  rate_limit_segments_per_sec => '1',
+  max_get_time                => '86400'
+}
+```
+
+####`rate_limit_after_segment`
+Start rate-limiting DLO segment serving after the Nth segment of a segmented object.
+
+####`rate_limit_segments_per_sec`
+Once segment rate-limiting kicks in for an object, limit segments served to N per second.
+0 means no rate-limiting.
+
+####`max_get_time`
+Time limit on GET requests (seconds).
+
 ### Class: swift::storage
 
 Class that sets up all of the configuration and dependencies for swift storage server instances.

manifests/proxy/dlo.pp

@@ -0,0 +1,43 @@
+#
+# Configure swift dlo.
+#
+# == Examples
+#
+#  include ::swift::proxy::dlo
+#
+# == Parameters
+#
+# [*rate_limit_after_segment*]
+# Start rate-limiting DLO segment serving after the Nth segment of a segmented object.
+# Default to 10.
+#
+# [*rate_limit_segments_per_sec*]
+# Once segment rate-limiting kicks in for an object, limit segments served to N per second.
+# 0 means no rate-limiting.
+# Default to 1.
+#
+# [*max_get_time*]
+# Time limit on GET requests (seconds).
+# Default to 86400.
+#
+# == Authors
+#
+#   Aleksandr Didenko adidenko@mirantis.com
+#
+# == Copyright
+#
+# Copyright 2015 Mirantis Inc, unless otherwise noted.
+#
+class swift::proxy::dlo (
+  $rate_limit_after_segment    = '10',
+  $rate_limit_segments_per_sec = '1',
+  $max_get_time                = '86400'
+) {
+
+  concat::fragment { 'swift_dlo':
+    target  => '/etc/swift/proxy-server.conf',
+    content => template('swift/proxy/dlo.conf.erb'),
+    order   => '36',
+  }
+
+}

spec/acceptance/basic_swift_spec.rb

@@ -105,14 +105,17 @@ class { '::swift::ringbuilder':
       }
       class { '::swift::proxy':
         proxy_local_net_ip => '127.0.0.1',
-        pipeline           => ['healthcheck', 'cache', 'tempauth', 'proxy-server'],
+        pipeline           => ['healthcheck', 'cache', 'tempauth', 'dlo', 'proxy-server'],
         account_autocreate => true,
         require            => Class['swift::ringbuilder'],
       }
       class { '::swift::proxy::authtoken':
         admin_password => 'a_big_secret',
       }
-      class { ['::swift::proxy::healthcheck', '::swift::proxy::cache', '::swift::proxy::tempauth']: }
+      class {
+        [ '::swift::proxy::healthcheck', '::swift::proxy::cache',
+        '::swift::proxy::tempauth', '::swift::proxy::dlo' ]:
+      }
       EOS
 
 

spec/classes/swift_proxy_dlo_spec.rb

@@ -0,0 +1,48 @@
+require 'spec_helper'
+
+describe 'swift::proxy::dlo' do
+
+  let :facts do
+    {}
+  end
+
+  let :fragment_file do
+    "/var/lib/puppet/concat/_etc_swift_proxy-server.conf/fragments/36_swift_dlo"
+  end
+
+  describe "when using default parameters" do
+    it 'should build the fragment with correct parameters' do
+      verify_contents(catalogue, fragment_file,
+        [
+          '[filter:dlo]',
+          'use = egg:swift#dlo',
+          'rate_limit_after_segment = 10',
+          'rate_limit_segments_per_sec = 1',
+          'max_get_time = 86400',
+        ]
+      )
+    end
+  end
+
+  describe "when overriding default parameters" do
+    let :params do
+      {
+        :rate_limit_after_segment    => '30',
+        :rate_limit_segments_per_sec => '5',
+        :max_get_time                => '6400',
+      }
+    end
+    it 'should build the fragment with correct parameters' do
+      verify_contents(catalogue, fragment_file,
+        [
+          '[filter:dlo]',
+          'use = egg:swift#dlo',
+          'rate_limit_after_segment = 30',
+          'rate_limit_segments_per_sec = 5',
+          'max_get_time = 6400',
+        ]
+      )
+    end
+  end
+
+end

templates/proxy/dlo.conf.erb

@@ -0,0 +1,6 @@
+
+[filter:dlo]
+use = egg:swift#dlo
+rate_limit_after_segment = <%= @rate_limit_after_segment %>
+rate_limit_segments_per_sec = <%= @rate_limit_segments_per_sec %>
+max_get_time = <%= @max_get_time %>