{"id":6310,"date":"2014-10-08T16:57:00","date_gmt":"2014-10-08T14:57:00","guid":{"rendered":"http:\/\/blog.zhaw.ch\/icclab\/?p=6310"},"modified":"2014-11-05T18:30:13","modified_gmt":"2014-11-05T16:30:13","slug":"comparison-of-ryu-and-opendaylight-northbound-apis","status":"publish","type":"post","link":"https:\/\/blog.zhaw.ch\/icclab\/comparison-of-ryu-and-opendaylight-northbound-apis\/","title":{"rendered":"Comparison of Ryu and OpenDaylight Northbound APIs"},"content":{"rendered":"

For our SDK4SDN work\u00a0we made\u00a0a comparison between two SDN controllers:\u00a0Ryu<\/a> and Opendaylight<\/a>. We focused\u00a0on the Northbound APIs of the controllers and we compared the capabilities and ease of use of their respective REST APIs.<\/p>\n

Both controllers support REST<\/a>, which is based on a mix of HTTP, JSON and XML. In Ryu a WSGI web server is\u00a0used to create the REST APIs, which link with other systems and browsers. In OpenDaylight, the Jersey library provides the REST APIs with both JSON and XML interfaces. Jersey also provides its own API to simplify RESTful services by extending the JAX-RS<\/a> toolkit which is compliant with the Northbound API.<\/p>\n

<\/p>\n

The tables below outline some standard operations and\u00a0Northbound REST APIs where you can find similar REST methods.<\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Table 1- Northbound REST API methods similarities in OpenStack<\/caption>\n
OpenStack<\/b><\/td>\n<\/tr>\n
Operation<\/b><\/td>\nRyu API<\/a><\/b><\/td>\nOpenDaylight API<\/a><\/b><\/td>\n<\/tr>\n<\/thead>\n
Router Configuration<\/td>\n<\/td>\nNeutron Routers Northbound<\/td>\n<\/tr>\n
Firewall Configuration<\/td>\n<\/td>\nNeutron Firewall Northbound
\nNeutron Firewall Policy Northbound
\nNeutron Firewall Rules Northbound<\/td>\n<\/tr>\n
Network Configuration<\/td>\nrest.py<\/td>\nNeutron Networks Northbound<\/td>\n<\/tr>\n
Switch Configuration<\/td>\nrest_conf_switch.py<\/td>\n<\/td>\n<\/tr>\n
Port Configuration<\/td>\nrest.py<\/td>\nNeutron Ports Northbound<\/td>\n<\/tr>\n
Flow Programming<\/td>\n<\/td>\n<\/td>\n<\/tr>\n
Statistics<\/td>\n<\/td>\n<\/td>\n<\/tr>\n
Topology<\/td>\n<\/td>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

 <\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Table 2- Northbound REST API methods similarities in Generic Networks<\/caption>\n
Generic Networks<\/b><\/td>\n<\/tr>\n
Operation<\/b><\/td>\nRyu API<\/b><\/td>\nOpenDaylight API<\/b><\/td>\n<\/tr>\n<\/thead>\n
Router Configuration<\/td>\nrest_router.py<\/td>\nStatic Routing Northbound<\/td>\n<\/tr>\n
Firewall Configuration<\/td>\nrest_firewall.py<\/td>\n<\/td>\n<\/tr>\n
Network Configuration<\/td>\n<\/td>\n<\/td>\n<\/tr>\n
Switch Configuration<\/td>\n<\/td>\nSwitch Northbound<\/td>\n<\/tr>\n
Port Configuration<\/td>\n<\/td>\n<\/td>\n<\/tr>\n
Flow Programming<\/td>\nofctl_rest.py<\/td>\nFlow Programmer Northbound<\/td>\n<\/tr>\n
Statistics<\/td>\nofctl_rest.py<\/td>\nStatistics Northbound<\/td>\n<\/tr>\n
Topology<\/td>\nrest_topology.py<\/td>\nTopology Northbound JAXRS<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

A detailed description of REST APIs methods can be found here : Ryu Northbound APIs<\/a> and OpenDaylight Northbound APIs<\/a>.<\/p>\n

The OpenDaylight controller is built using the Java OSGi framework<\/a>. OSGi adds a modular framework that allows starting, stopping, loading and unloading of Java modules without bringing down the entire running JVM platform. Ryu controller does not offer this comodity. In Ryu we need to stop the controller and run it again with the needed modules for the REST methods we want to execute or we need to build a REST API with all REST modules included in it, which runs once and provides all REST methods without stopping the controller. <\/p>\n

After this analysis, we concluded that there are not so many similarities between Northbound parts of the controllers. To unify communication between controllers we need another layer of APIs. But creating another layer of abstraction on top of the controllers would not be very efficient.<\/p>\n

Schlagw\u00f6rter: comparison<\/a>, JAX-RS<\/a>, Northbound<\/a>, OpenDaylight<\/a>, OSGi<\/a>, REST<\/a>, Ryu<\/a>, SDK4SDN<\/a>, SDN<\/a>, WSGI<\/a>
<\/div>","protected":false},"excerpt":{"rendered":"

For our SDK4SDN work\u00a0we made\u00a0a comparison between two SDN controllers:\u00a0Ryu and Opendaylight. We focused\u00a0on the Northbound APIs of the controllers and we compared the capabilities and ease of use of their respective REST APIs. Both controllers support REST, which is based on a mix of HTTP, JSON and XML. In Ryu a WSGI web server […]<\/p>\n","protected":false},"author":150,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"ngg_post_thumbnail":0,"footnotes":""},"categories":[1],"tags":[473,474,466,465,472,467,464,463,293,471],"features":[],"class_list":["post-6310","post","type-post","status-publish","format-standard","hentry","category-allgemein","tag-comparison","tag-jax-rs","tag-northbound","tag-opendaylight","tag-osgi","tag-rest","tag-ryu","tag-sdk4sdn","tag-sdn","tag-wsgi"],"yoast_head":"\nComparison of Ryu and OpenDaylight Northbound APIs - Service Engineering (ICCLab & SPLab)<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/blog.zhaw.ch\/icclab\/comparison-of-ryu-and-opendaylight-northbound-apis\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Comparison of Ryu and OpenDaylight Northbound APIs\" \/>\n<meta property=\"og:description\" content=\"For our SDK4SDN work\u00a0we made\u00a0a comparison between two SDN controllers:\u00a0Ryu and Opendaylight. 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