yc config files

app.py

import os
import time
import psutil
from flask import Flask

app = Flask(__name__)

STALE = 12345678910111213

@app.route('/')
def hello_world():
    t_end = time.time() + 2
    while time.time() < t_end:
        STALE*STALE
    return "Request finished. CPU load at the end of request: %s \n" % psutil.cpu_percent()
    
@app.route('/health')
def healthcheck():
    return "OK"

bootstrap.sh

#!/bin/bash

apt update
apt install -fy python-pip build-essential python-dev

pip install flask psutil

wget https://gist.githubusercontent.com/AlPervakov/9341674a2b904177266a9bcc592799a5/raw/38bed527b1aad744126633afcbf2de54e3349fbf/app.py -O app.py
FLASK_APP=app.py flask run --host=0.0.0.0 --port=80

metadata.yaml

#cloud-config
disable_root: true
timezone: Europe/Moscow
repo_update: true
repo_upgrade: true
apt:
  preserve_sources_list: true
  
users:
    - default
    - name: ubuntu
      sudo: ALL=(ALL) NOPASSWD:ALL
      shell: /bin/bash
      ssh-authorized-keys:
        - "ssh-rsa <ssh-key>"

packages:
  - nginx

runcmd:
  - [ systemctl, nginx-reload ]
  - [ systemctl, enable, nginx.service ]
  - [ systemctl, start, --no-block, nginx.service ]

specification.yaml

name: test-group
service_account_id: <id>
description: "This instance group was created from YAML config"
instance_template:
  description: "My instance template"
  platform_id: standard-v1
  resources_spec:
    memory: 2g
    cores: 1
  boot_disk_spec:
    mode: READ_WRITE
    disk_spec:
      type_id: network-hdd
      size: 10g
      image_id: fd83bj827tp2slnpp7f0
  network_interface_specs:
  - network_id: enpcp9vv401rtaf668do
    subnet_ids:
    - e9be7u6fv4hqfmauv8rk
    primary_v4_address_spec:
      one_to_one_nat_spec:
        ip_version: IPV4
  metadata:
    user-data: |-
      #cloud-config
      runcmd:
      - wget https://gist.githubusercontent.com/AlPervakov/9341674a2b904177266a9bcc592799a5/raw/bd25f596e0b5552083bb824af3cb31b4c127037a/bootstrap.sh
      - bash bootstrap.sh
scale_policy:
  auto_scale:
    min_zone_size: 1
    max_size: 6
    measurement_duration: 60s
    warmup_duration: 20s
    stabilization_duration: 100s
    initial_size: 1
    cpu_utilization_rule:
      utilization_target: 80
deploy_policy:
  max_unavailable: 2
  max_expansion: 2
  max_deleting: 1
  max_creating: 1
  startup_duration: 0s
allocation_policy:
  zones:
  - zone_id: ru-central1-a
load_balancer_spec:
  target_group_spec:
    name: my-target-group
    description: "example target group"
health_checks_spec:
  health_check_specs:
  - interval: 2s
    timeout: 1s
    unhealthy_threshold: 2
    healthy_threshold: 2
    http_options:
      port: 80
      path: /health