Ryu dynamic loader allows applications to be dynamically loaded and unloaded from the Ryu SDN framework without restarting the Ryu manager. This improves on the previous approach which required restarting Ryu to update applications, which was time-consuming and resulted in loss of application data. The dynamic loader plugin integrates with Ryu's command line interface to provide commands for listing, installing, and uninstalling applications while the Ryu manager continues running.

1. Ryu dynamic loader
W2CNLab 曾毅

2. About me
• W2CNLab Master student
• SDN
• ryu contributor

3. What is ryu ?
• Ryu is a component-based software defined
networking framework.
• Python(2 -> 3)
• Apache 2.0 license

4. Ryu architecture
ryu manager
ryu apps…. ofp_handler
context

5. Why do I want to create it?
• Update application -> restart ryu
• Restart ryu -> take too much time to restart it
• Restart ryu -> lost current application data

6. Dynamic loading
load app class
create context from class
instantiate app
join

7. Command line interface
ryu
manager
CLI

8. Command line interface
ryu
manager
dynamic
loader plugin
CLI

9. How to use?
• ryu-manager dl_plugin.py ryu.controller.ofp_handler
• ./cli.py

10. Commands
• list
• install
• uninstall

11. Demo