DevOps: What is Terraform Lifecycle?

1resource "aws_instance" "web" {
2  ami           = "ami-xxx"
3  instance_type = "t3.micro"
4  lifecycle {
5    create_before_destroy = true
6  }
7}

1resource "aws_db_instance" "main" {
2  engine         = "postgres"
3  instance_class = "db.t3.micro"
4  lifecycle {
5    prevent_destroy = true
6  }
7}

1resource "aws_instance" "web" {
2  ami           = "ami-xxx"
3  instance_type = "t3.micro"
4  lifecycle {
5    ignore_changes = [tags["LastModified"]]
6  }
7}

1resource "aws_instance" "web" {
2  ami           = var.ami_id
3  instance_type = "t3.micro"
4  lifecycle {
5    replace_triggered_by = [aws_security_group.web]
6  }
7}