Instance

# Compute Engine 인스턴스 생성
gcloud compute instances create web-server-01 \
    --project=my-project \
    --zone=asia-northeast3-a \
    --machine-type=e2-medium \
    --network-interface=network-tier=PREMIUM,subnet=default \
    --maintenance-policy=MIGRATE \
    --service-account=123456789-compute@developer.gserviceaccount.com \
    --scopes=https://www.googleapis.com/auth/cloud-platform \
    --tags=http-server,https-server \
    --create-disk=auto-delete=yes,boot=yes,device-name=web-server-01,image=projects/debian-cloud/global/images/debian-11-bullseye-v20240213,mode=rw,size=50,type=projects/my-project/zones/asia-northeast3-a/diskTypes/pd-balanced \
    --labels=env=production,team=backend \
    --metadata-from-file=startup-script=setup-web.sh

# 프리엠터블 인스턴스 (최대 80% 할인, 24시간 제한)
gcloud compute instances create batch-worker \
    --zone=asia-northeast3-a \
    --machine-type=n2-standard-4 \
    --preemptible \
    --no-restart-on-failure \
    --maintenance-policy=TERMINATE

# 인스턴스 목록 및 상태 확인
gcloud compute instances list \
    --filter="zone:asia-northeast3-a" \
    --format="table(name,zone,machineType,status,networkInterfaces[0].accessConfigs[0].natIP)"

# 머신 타입 변경
gcloud compute instances stop web-server-01 --zone=asia-northeast3-a
gcloud compute instances set-machine-type web-server-01 \
    --zone=asia-northeast3-a \
    --machine-type=e2-standard-4
gcloud compute instances start web-server-01 --zone=asia-northeast3-a

# 스냅샷 생성 (백업)
gcloud compute disks snapshot web-server-01 \
    --zone=asia-northeast3-a \
    --snapshot-names=web-server-backup-$(date +%Y%m%d)

# AWS EC2 인스턴스 + Auto Scaling 구성
# variables.tf
variable "environment" {
  default = "production"
}

variable "instance_type" {
  default = "t3.medium"
}

# main.tf - Launch Template
resource "aws_launch_template" "web" {
  name_prefix   = "web-server-"
  image_id      = data.aws_ami.amazon_linux.id
  instance_type = var.instance_type

  iam_instance_profile {
    name = aws_iam_instance_profile.web.name
  }

  network_interfaces {
    associate_public_ip_address = true
    security_groups             = [aws_security_group.web.id]
  }

  monitoring {
    enabled = true
  }

  user_data = base64encode(templatefile("${path.module}/user-data.sh", {
    environment = var.environment
  }))

  tag_specifications {
    resource_type = "instance"
    tags = {
      Name        = "web-server"
      Environment = var.environment
    }
  }

  # 스팟 인스턴스 옵션 (비용 최적화)
  instance_market_options {
    market_type = "spot"
    spot_options {
      max_price                      = "0.05"
      spot_instance_type             = "one-time"
      instance_interruption_behavior = "terminate"
    }
  }
}

# Auto Scaling Group
resource "aws_autoscaling_group" "web" {
  name                = "web-asg"
  vpc_zone_identifier = data.aws_subnets.private.ids
  target_group_arns   = [aws_lb_target_group.web.arn]
  health_check_type   = "ELB"

  min_size         = 2
  max_size         = 10
  desired_capacity = 3

  mixed_instances_policy {
    launch_template {
      launch_template_specification {
        launch_template_id = aws_launch_template.web.id
        version            = "$Latest"
      }

      # 온디맨드 + 스팟 혼합 (비용 70% 절감)
      override {
        instance_type     = "t3.medium"
        weighted_capacity = "1"
      }
      override {
        instance_type     = "t3.large"
        weighted_capacity = "2"
      }
    }

    instances_distribution {
      on_demand_base_capacity                  = 1
      on_demand_percentage_above_base_capacity = 25
      spot_allocation_strategy                 = "capacity-optimized"
    }
  }

  instance_refresh {
    strategy = "Rolling"
    preferences {
      min_healthy_percentage = 75
    }
  }
}