How to fix Error: Error creating EC2 Instance: InsufficientInstanceCapacity in Terraform

terraform apply

resource "aws_instance" "example" {
  ami               = "ami-12345678"
  instance_type     = "m5.large"
  availability_zone = "us-east-1a"
}

resource "aws_instance" "example" {
  ami           = "ami-12345678"
  instance_type = "m5.large"
  # availability_zone removed - AWS will choose from available capacity
}

resource "aws_instance" "example" {
  ami               = "ami-12345678"
  instance_type     = "m5.large"
  availability_zone = "us-east-1b"  # Changed from us-east-1a
}

resource "aws_autoscaling_group" "example" {
  availability_zones = ["us-east-1a", "us-east-1b", "us-east-1c"]
  # AWS will launch in any AZ with available capacity
}

resource "aws_instance" "example" {
  ami           = "ami-12345678"
  instance_type = "m6i.large"  # Changed from m5.large
}

resource "aws_instance" "fleet" {
  count         = 10
  ami           = "ami-12345678"
  instance_type = "m5.large"
}

resource "aws_instance" "fleet" {
  count         = 3  # Reduced from 10
  ami           = "ami-12345678"
  instance_type = "m5.large"
}

# Run terraform apply multiple times or in batches

resource "aws_ec2_capacity_reservation" "example" {
  instance_type           = "m5.large"
  instance_platform       = "Linux/UNIX"
  availability_zone       = "us-east-1a"
  instance_count          = 5
}

resource "aws_instance" "example" {
  ami                          = "ami-12345678"
  instance_type                = "m5.large"
  capacity_reservation_id      = aws_ec2_capacity_reservation.example.id
}

resource "aws_instance" "example" {
  ami           = "ami-12345678"
  instance_type = "m5.large"
  instance_interruption_behavior = "stop"
  spot_price    = "0.05"  # Set a bid price
}