use OPTIONS /api/providers

app/controllers/api/providers_controller.rb

@@ -85,6 +85,20 @@ def import_vm_resource(type, id = nil, data = {})
       end
     end
 
+    def options
+      if params[:ems_type].blank?
+        all_options = Hash[ExtManagementSystem.descendants.collect do |ems|
+            [ems.ems_type, ems.respond_to?(:provider_settings) ? ems.provider_settings : {}]
+          end
+        ]
+        all_options.delete(nil)
+        render_options(:providers, all_options)
+      else
+        ems_class = ExtManagementSystem.descendants.find { |ems| ems.ems_type == params[:ems_type] }
+        render_options(:providers, ems_class.respond_to?(:provider_settings) ? ems_class.provider_settings : {})
+      end
+    end
+
     private
 
     def format_provider_custom_attributes(attribute)

spec/requests/api/providers_spec.rb

@@ -1116,4 +1116,28 @@ def gen_import_request
       end
     end
   end
+
+  context "OPTIONS /api/providers" do
+    it "returns options for all providers when no query" do
+      api_basic_authorize
+      run_options(providers_url)
+      expect(response.parsed_body["data"].keys.count).to eq(
+        ExtManagementSystem.descendants.select { |ems| !ems.ems_type.blank?}.count)
+      expect(response.parsed_body["data"]["kubernetes"]["proxy_settings"]["settings"]["http_proxy"]["label"]).to eq(N_('HTTP Proxy'))
+    end
+
+    it "returns options for all queried provider class" do
+      api_basic_authorize
+      ExtManagementSystem.descendants.select { |ems| ems.respond_to?(:provider_settings) }.each do |ems_type|
+        run_options("#{providers_url}?ems_type=#{ems_type.ems_type}")
+        expect_options_results(:providers, JSON.parse(ems_type.provider_settings.to_json))
+      end
+    end
+
+    it "returns proxy settings options for kubernetes provider" do
+      api_basic_authorize
+      run_options(providers_url + "?ems_type=kubernetes")
+      expect(response.parsed_body["data"]["proxy_settings"]["settings"]["http_proxy"]["label"]).to eq(N_('HTTP Proxy'))
+    end
+  end
 end