2.1.1. Lab 1 - Create an iRule that Parses the URI to Route Traffic

Creating your first HTTP iRule that routes traffic based upon the value of the Host name

The goal of this lab is to route incoming HTTP requests to a specific pool based on the incoming http host name.

Please create an iRule that will route traffic based on the following table:

Host Name	Pool Name
dvwa.f5lab.com	dvwa_pool_http
peruggia.f5lab.com	peruggia_http_pool
wackopicko.f5lab.com	wackopicko_http_pool

Important

• Estimated completion time: 10 minutes

1. Open Chrome Browser

2. Enter https://bigip1 into the address bar and hit Enter

   

3. Login with username: admin

   password: admin.F5demo.com

4. Click Local Traffic -> iRules -> iRules List

5. Click Create button

   

6. Enter Name of URI_Routing_iRule

7. Enter your code

8. Click Finished

9. Click Local Traffic -> Virtual Servers -> Virtual Server List

10. Click on http_irules_vip

    

11. Click on the Resources tab

12. Click Manage button for the iRules section

    

13. Click on URI_Routing_iRule from the Available box and click the << button, thus moving it to the Enabled box.

    

14. Click the Finished button

15. Open a new tab in Chrome

16. Enter http://dvwa.f5lab.com/ and ensure you get there

17. Now enter http://peruggia.f5lab.com/ and ensure you get to the app

18. Finally, enter http://wackopicko.f5lab.com/ and ensure you can get to that app

    

19. If you see this image below - it means your iRule did not work.

    

Hint

If you need a basic hint here is some example code:

Here is a link to DevCentral: https://clouddocs.f5.com/api/irules/HTTP__host.html

If you are really stuck, here is what we are looking for:

1. When HTTP_Request comes in
2. Evaluate the HTTP_host name
3. If it matches send it to the correct pool.
4. Loop through all the host names you want to match on and continue to direct to the correct pools.
5. Now you should have enough to understand and the majority of code needed to create the iRule. If not here is the complete iRule.