Hashicorp Terraform Associate

Notes on the course from Udemy.

General

Use terraform show to get a full overview of the state, or terraform state list to only list resources
Use terraform providers to get a list of required providers
Use data blocks to fetch data from provider resources
Use locals to define variables for expressions
Terraform supports multi-line comments using /* ... */
Provisioners (local-exec, remote-exec, file) are considered a last resort, use configuration management tools like Ansible instead
Use terraform taint <RESOURCE_NAME> to mark a resource for recreation without changing source code
Use terraform import <RESOURCE_NAME> <RESOURCE_ID> to import existing resources
Workspaces can be used to manage different environments, but as state is stored in a single state file, they should be used with caution. Consider using dedicated state files for each environment instead.
Set the environment variable TF_LOG to DEBUG or TRACE to get more detailed logs. Set TF_LOG_PATH to a file to save logs to a file.