terraform plan -out plan.out
Output the deployment plan to plan.out
terraform apply plan.out
Use the plan.out plan file to deploy infrastructure
terraform apply --auto-approve
Apply changes without being prompted to enter “yes”
terraform plan -destroy
Outputs a destroy plan
terraform apply -target=aws_instance.my_ec2
Only apply/deploy changes to the targeted resource
terraform apply -var my_region_variable=us-east-1
Pass a variable via command-line while applying a configuration
terraform apply -lock=true
Lock the state file so it can’t be modified by any other Terraform apply or modification action
terraform apply refresh=false
Do not reconcile state file with real-world resources
terraform apply --parallelism=5
Number of simultaneous resource operations
terraform refresh
Reconcile the state in Terraform state file with real-world resources
terraform providers
Get information about providers used in current configuration
State
terraform state show aws_instance.my_ec2
Show details stored in Terraform state for the resource
terraform state pull > terraform.tfstate
Download and output terraform state to a file
terraform state mv aws_iam_role.my_ssm_role module.custom_module
Move a resource tracked via state to different module
terraform state replace-provider hashicorp/aws registry.custom.com/aws
Replace an existing provider with another
terraform state list
List out all the resources tracked via the current state file
terraform state rm aws_instance.myinstace
Unmanage a resource, delete it from Terraform state file
Import & Outputs
terraform import aws_instance.new_ec2_instance i-abcd1234
Import EC2 instance with id i-abcd1234 into the Terraform resource named “new_ec2_instance” of type “aws_instance”
terraform output
List all outputs as stated in code
terraform output instance_public_ip
List out a specific declared output
terraform output -json
List all outputs in JSON format
Other
terraform -install-autocomplete
Set cli auto completion
terraform version
Display Terraform binary version
terraform get -update=true
Download and update modules in the “root” module
terraform graph | dot -Tpng > graph.png
Produce a PNG diagrams showing relationship and dependencies between Terraform resource in your configuration/code
terraform taint aws_instance.my_ec2
Taints resource to be recreated on next apply
terraform untaint aws_instance.my_ec2
Remove taint from a resource
terraform force-unlock LOCK_ID
Forcefully unlock a locked state file, LOCK_ID provided when locking the State file beforehand
