Step-00: Pre-requisites
- Create a EC2 Key pain with name
terraform-key and copy the terraform-key.pem file in the folder private-key in terraform-manifest folder
- Connection Block for provisioners uses this to connect to newly created EC2 instance to copy files using
file provisioner, execute scripts using remote-exec provisioner
Step-01: Introduction
- Understand about local-exec Provisioner
- The
local-exec provisioner invokes a local executable after a resource is created.
- This invokes a process on the machine running Terraform, not on the resource.
Step-02: Review local-exec provisioner code
- We will create one provisioner during creation-time. It will output private ip of the instance in to a file named
creation-time-private-ip.txt
- We will create one more provisioner during destroy time. It will output destroy time with date in to a file named
destroy-time.txt
- C3-ec2-instance.tf
# local-exec provisioner (Creation-Time Provisioner - Triggered during Create Resource)
provisioner "local-exec" {
command = "echo ${aws_instance.my-ec2-vm.private_ip} >> creation-time-private-ip.txt"
working_dir = "local-exec-output-files/"
#on_failure = continue
}
# local-exec provisioner - (Destroy-Time Provisioner - Triggered during Destroy Resource)
provisioner "local-exec" {
when = destroy
command = "echo Destroy-time provisioner Instanace Destroyed at `date` >> destroy-time.txt"
working_dir = "local-exec-output-files/"
}
# Terraform Initialize
terraform init
# Terraform Validate
terraform validate
# Terraform Format
terraform fmt
# Terraform Plan
terraform plan
# Terraform Apply
terraform apply -auto-approve
# Verify
Verify the file in folder "local-exe-output-files/creation-time-private-ip.txt"
Step-04: Clean-Up Resources & local working directory
# Terraform Destroy
terraform destroy -auto-approve
# Verify
Verify the file in folder "local-exe-output-files/destroy-time.txt"
# Delete Terraform files
rm -rf .terraform*
rm -rf terraform.tfstate*