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 manila will return a 413 Entity Too Large
and not log anything to manila.log.

Change-Id: I69a790df4774fa4010c356033b8a8167569321c1
Closes-Bug: #1835161

manifests/api.pp

@@ -55,6 +55,10 @@
 #   HTTPProxyToWSGI middleware.
 #   Defaults to $::os_service_default.
 #
+# [*max_request_body_size*]
+#   (Optional) Set max request body size
+#   Defaults to $::os_service_default.
+#
 # [*enabled_share_protocols*]
 #   (optional) Defines the enabled share protocols provided by Manila.
 #   Defaults to $::os_service_default
@@ -87,6 +91,7 @@ class manila::api (
   $ratelimits                   = undef,
   $ratelimits_factory           = 'manila.api.v1.limits:RateLimitingMiddleware.factory',
   $enable_proxy_headers_parsing = $::os_service_default,
+  $max_request_body_size        = $::os_service_default,
   $enabled_share_protocols      = $::os_service_default,
   $service_workers              = $::os_workers,
   # Deprecated
@@ -165,6 +170,7 @@ server.")
 
   oslo::middleware { 'manila_config':
     enable_proxy_headers_parsing => $enable_proxy_headers_parsing,
+    max_request_body_size        => $max_request_body_size,
   }
 
   if $auth_strategy == 'keystone' {

releasenotes/notes/max_request_body_size-b3b7e87591bd6711.yaml

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

spec/classes/manila_api_spec.rb

@@ -32,6 +32,7 @@ describe 'manila::api' do
         is_expected.to contain_manila_config('DEFAULT/enabled_share_protocols').with(:value => '<SERVICE DEFAULT>')
         is_expected.to contain_oslo__middleware('manila_config').with(
           :enable_proxy_headers_parsing => '<SERVICE DEFAULT>',
+          :max_request_body_size        => '<SERVICE DEFAULT>',
         )
         is_expected.to contain_manila_config('DEFAULT/default_share_type').with(:value => '<SERVICE DEFAULT>')
         is_expected.to contain_manila_config('DEFAULT/osapi_share_workers').with(:value => '2')
@@ -90,6 +91,18 @@ describe 'manila::api' do
       end
     end
 
+    context 'with only required params' do
+      let :params do
+        req_params.merge({'max_request_body_size' => '102400'})
+      end
+      it { is_expected.to contain_class('manila::policy') }
+      it 'should configure manila api correctly' do
+        is_expected.to contain_oslo__middleware('manila_config').with(
+          :max_request_body_size => '102400',
+        )
+      end
+    end
+
     context 'with enabled false' do
       let :params do
         req_params.merge({'enabled' => false})