As i was following https://www.digitalocean.com/community/tutorials/how-to-migrate-iptables-firewall-rules-to-a-new-server. I have a requirement like suppose i have a ALB contains 2 targets. primary and secondary. Always ALB connected to primary when primary go down ALB routes requests to secondary (acts as stand by).For this i have health check bash script which runs every second as long as primary is healthy ALB routes requests to it. When primary becomes unhealthy ALB routes traffic to secondary. In my health check script i am using iptables to block port on primary when it is unhealthy and unblock port on secondary. i want to swap out all iptables replace with aws cli commands to register and deregister the target. how can write code in bash script to achieve this.
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