Manage oslo_middleware/max_request_body_size

So that we can increase it from the default 114688

Useful in case for example the OS-Federation mapping is too large.

If this limit is breached cinder will return a 413 Entity Too Large
and not log anything to cinder.log.

Change-Id: I4364ef41400ea6c66c843318119f24ef7c47434b
Closes-Bug: #1835161

manifests/api.pp

@@ -90,6 +90,10 @@
 #   middleware should parse the proxy headers or not.(boolean value)
 #   Defaults to $::os_service_default
 #
+# [*max_request_body_size*]
+#   (Optional) Set max request body size
+#   Defaults to $::os_service_default.
+#
 # [*use_ssl*]
 #   (optional) Enable SSL on the API server
 #   Defaults to false
@@ -174,6 +178,7 @@ class cinder::api (
   $osapi_max_limit                = $::os_service_default,
   $service_name                   = $::cinder::params::api_service,
   $enable_proxy_headers_parsing   = $::os_service_default,
+  $max_request_body_size          = $::os_service_default,
   $use_ssl                        = false,
   $cert_file                      = $::os_service_default,
   $key_file                       = $::os_service_default,
@@ -291,6 +296,7 @@ running as a standalone service, or httpd for being run by a httpd server")
 
   oslo::middleware {'cinder_config':
     enable_proxy_headers_parsing => $enable_proxy_headers_parsing,
+    max_request_body_size        => $max_request_body_size,
   }
 
   cinder_config {

releasenotes/notes/max_request_body_size-a199b5c1e0d2f104.yaml

@@ -0,0 +1,5 @@
+---
+features:
+  - |
+    Add support to configure `[oslo_middleware]/max_request_body_size` with
+    `$max_request_body_size`.

spec/classes/cinder_api_spec.rb

@@ -57,6 +57,7 @@ describe 'cinder::api' do
         is_expected.to contain_cinder_config('DEFAULT/osapi_volume_listen_port').with('value' => '<SERVICE DEFAULT>')
         is_expected.to contain_oslo__middleware('cinder_config').with(
           :enable_proxy_headers_parsing => '<SERVICE DEFAULT>',
+          :max_request_body_size        => '<SERVICE DEFAULT>',
         )
       end
     end