Presentation on how to integrate Big IP F5 with autoscale, Cloudformation, SNS using Python Flask framework in AWS

1. Autoscale-with-BIG-IP-F5-SNS-CF
By Kamal Maiti
Sr. Subject Matter Expert
Linux System Engineer
Amdocs Development Center, India
Agenda :
• Autoscaling CF [aws-autoscale-with-f5-cf-v2.json]
• Http Endpoint [aws-sns-http-endpoint.json]
• Endpoint subscription confirmation [aws-sns-http-subscriptionconfirmation.py]
• Python app for processing SNS events [aws-autoscaling-with-f5-app.py]

2. Autoscale-with-BIG-IP-F5-SNS-CF
 Autoscaling CF [aws-autoscale-with-f5-cf-v2.json]
NB: Only Important part is mentioned below
How many instances during launch of CF and max limit?
Which instance will be terminated?
SNS Topic ARN
Autoscaling Events

3. Autoscale-with-BIG-IP-F5-SNS-CF
 Endpoint [aws-sns-http-endpoint.json]
 SNS
HTTP Endpoint URL
HTTP Endpoint mapping
At AWS SNS Console

4. Autoscale-with-BIG-IP-F5-SNS-CF
 Endpoint subscription confirmation [aws-sns-http-subscriptionconfirmation.py
Python Modules imported
A session is created that can be used for
any aws res
A client needs to be created calls desired
method

5. Autoscale-with-BIG-IP-F5-SNS-CF
 Python app for processing SNS events [aws-autoscaling-with-f5-app.py]
Function used:
scale("/scale", methods=['POST','GET']))
_does_node_exist(ip_address)
_get_node_list():
_is_node_in_a_pool(ip_address)
_delete_member_from_pool(ip_address,pool_names)
_delete_node(ip_address)
_add_node(ip_address, as_group_name, instance_id)
_add_member_to_pool(ip_address, as_group_name, instance_id)

6. Autoscale-with-BIG-IP-F5-SNS-CF
Module and logging :
 Python app for processing SNS events [aws-autoscaling-with-f5-app.py]
Logger object File handler
Log formatting
Log Level
Logger.addHandler
Logger.debug()
Flask micro framework for webserver
For tracking activity

7. Autoscale-with-BIG-IP-F5-SNS-CF
 Python app for processing SNS events [aws-autoscaling-with-f5-app.py]
 Process Post Data :
 Dictionary & instance of Flask :
Python list var for keeping instance ID and IP address
Flask framework object

8. Autoscale-with-BIG-IP-F5-SNS-CF
Instance Launch Event
Instance Terminate Event
Unknown Event

9. Autoscale-with-BIG-IP-F5-SNS-CF
 Python app for processing SNS events [aws-autoscaling-with-f5-app.py]
 _does_node_exist(ip_address)
 _get_node_list():

10. Autoscale-with-BIG-IP-F5-SNS-CF
 Add & Delete IP:

11. Autoscale-with-BIG-IP-F5-SNS-CF
 Sample Log Messages:

12. Autoscale-with-BIG-IP-F5-SNS-CF
Q/A