- Variable helps in centralize and manage values in the configuration.
- The variable block consist of
- Type
- Description
- Default values.
- We can create a file variable.tf or default file name terraform.tfvars. We can also specify flag for variable files.
- For any other file name used to define variable, use the command flag, –var-file. You can specify more than one file, but they will be executed in sequence.
- All environment variables are defined using prefix TF_VAR_<variable name>
- Terraform as a built in variable called as PATH it’s basically used in modules.
- We can have below variable types in Terraform
- String – Can be Boolean True or False or simple string
- Map – A collection type (Associate array or Hash Table, similar to dictonary of Python)
- List – A collection type (List of item, starting with index Zero).
- We can call variables four ways,Through command prompt
- Environment variables
- Default variables
- Variable defined in files
- Variables have name and optional parameters,
- Type – if type is omitted then terraform consider it as by default string.
- Default
- Description
- Variables definition,
- To call the variable in terraform main file. We need to use the keyword var as prefix
- Syntax : var.<variable_name>
- Calling the variables in main terraform file,
