Terraform (contd)
- Third way of Authentication & Authorization in AWS using CLI
- Install AWS CLI Refer Here
- Current state of Terraform Template:
- The template create a vpc with fixed cidr range in a fixed region.
- Lets try to make the template generic
- A variable in a terraform template can accept the input from the user
- for input variables Refer Here
- For the changes done Refer Here
- Desigining Varaibles:
- Ensure you have right set of optional variable (Variable with default ) & required variables
- In many cases too many variables is not a good design. If the values can be calculated try calculating them
- To apply above mentioned best practices, lets calculate subnet cidr ranges, for this lets take help from terraform functions Refer Here and expressions Refer Here
- Finding cidrsubnet functions. Refer Here
- Refer Here for the changes
- For AZs lets use format function of string Refer Here
- Each Region in AWS will have different az’s and lets configure this Refer Here for the changes
