Fix Terraform Error: Context Deadline Exceeded (API Timeout)

# Usually succeeds on retry
terraform apply
 
# If it keeps failing, reduce parallelism
terraform apply -parallelism=5

Error: creating EC2 Instance: Post "https://ec2.us-east-1.amazonaws.com/": 
context deadline exceeded
 
Error: waiting for RDS Instance (mydb) create: context deadline exceeded

Error: Provider "aws" produced an unexpected error: 
Post https://sts.amazonaws.com/: context deadline exceeded (Client.Timeout exceeded)

terraform apply

# Reduce to 5 concurrent operations
terraform apply -parallelism=5
 
# Very aggressive — useful for debugging
terraform apply -parallelism=1

resource "aws_db_instance" "main" {
  engine         = "postgres"
  instance_class = "db.r6g.xlarge"
  # ...
 
  timeouts {
    create = "60m"   # Default is 40m
    update = "80m"
    delete = "60m"
  }
}
 
resource "aws_eks_cluster" "main" {
  name     = "my-cluster"
  role_arn = aws_iam_role.eks.arn
  # ...
 
  timeouts {
    create = "30m"
    update = "60m"
    delete = "15m"
  }
}

# Test connectivity to AWS API
curl -v https://ec2.us-east-1.amazonaws.com/
 
# Check DNS resolution
nslookup ec2.us-east-1.amazonaws.com
 
# Enable Terraform debug logging
export TF_LOG=DEBUG
terraform apply 2>&1 | tee terraform-debug.log
 
# Check for proxy issues
echo $HTTPS_PROXY $HTTP_PROXY $NO_PROXY

# Deploy in stages
terraform apply -target=module.networking
terraform apply -target=module.database
terraform apply -target=module.application
terraform apply  # Final pass for remaining resources

provider "aws" {
  region = "us-east-1"
 
  # Increase HTTP client timeout
  max_retries = 10
 
  default_tags {
    tags = {
      ManagedBy = "terraform"
    }
  }
}