DevOps Classroom Series – 02/Mar/2021

Refer Here for the usage of count meta-argument
Use the count for creating subnets, Refer Here for the changes done
Terraform has functions, and now lets use one function to calculate cidr ranges dynamically
Now lets recreate the terraform infra and use the cidrsubnet function Refer Here for the changes
Now lets look at terraform expressions Refer Here
Now lets generalize the az selection Refer Here
Now lets create the infrastructure in mumbai region (ap-south-1) with cidr range of 172.16.0.0/16
Subnet names in the template are actually fixed according to architecture, user should not be change those values
To acheive this lets use local variables, which are used with in template and cannot be set from outside. For the documentation of local variables Refer Here
Refer Here for the changes
Summary:
- We have used count for looping
- Calculated the values of az’s using terraform expressions
- for the values which should not be parameterized, we had used locals.
- Doing this has given us flexibility to use template in any region.