dpzc-hetzner/lab4/webservice-init.py

from hcloud import Client
from hcloud.images.domain import Image
from hcloud.server_types.domain import ServerType
from hcloud.networks.domain import NetworkSubnet
from hcloud.locations.domain import Location
from hcloud.load_balancer_types.domain import LoadBalancerType
from hcloud.load_balancers.domain import LoadBalancerTarget, LoadBalancerService, LoadBalancerHealthCheck, LoadBalancerHealtCheckHttp
from pathlib import Path

with open(f'{str(Path.home())}/.ssh/id_ed25519.pub', 'r') as file:
    ssh_pub = file.readline()

with open("../token.txt", "r") as file:
    api_token = file.read().strip()

client = Client(token=api_token)

PREFIX = "s478839"
NUM_OF_SERVERS = 5

loadbalancer_targets = []

ssh_name = f"{PREFIX}-pzc-ssh-key"
ssh_key = client.ssh_keys.get_by_name(ssh_name) or None
if not ssh_key:
    ssh_key = client.ssh_keys.create(name=f"{PREFIX}-pzc-ssh-key", public_key=ssh_pub)
print(f"Klucz {ssh_key.data_model.name} został dodany: {ssh_key.data_model.public_key}")

vnet_name = f"{PREFIX}-pzc-test-vnet"
vnet = client.networks.get_by_name(vnet_name) or None
if not vnet:
    vnet = client.networks.create(
        name=f"{PREFIX}-pzc-test-vnet", 
        ip_range="10.10.10.0/24", 
        subnets=[
            NetworkSubnet(ip_range="10.10.10.0/24", network_zone="eu-central", type="cloud")
        ]
    )
print(f"Utworzono sieć wirtualną {vnet.data_model.name} ({vnet.data_model.ip_range})")

webservice_init=r'''#cloud-config
packages:
  - apt-transport-https
  - ca-certificates
  - curl
  - gnupg-agent
  - software-properties-common
runcmd:
  - curl -fsSL https://git.wmi.amu.edu.pl/s478839/dpzc-hetzner/raw/branch/master/lab4/webservice > /root/webservice
  - cd /root/
  - chmod +x webservice
  - ./webservice
'''

for i in range(NUM_OF_SERVERS):
    webservice_server = client.servers.create(
        name=f"{PREFIX}-webservice-{i+1}", 
        server_type=ServerType("cx11"), 
        image=Image(name="ubuntu-20.04"), 
        ssh_keys=[ssh_key], 
        networks=[vnet], 
        location=Location("hel1"), 
        user_data=webservice_init
    )

    webservice_server.action.wait_until_finished()
    print(f"Tworzenie serwera webservice {i+1}: {webservice_server.action.complete}")
    loadbalancer_targets.append(LoadBalancerTarget(type="server", server=webservice_server.server, use_private_ip=True))

loadbalancer = client.load_balancers.create(
    name= f"{PREFIX}-loadbalancer",
    load_balancer_type=LoadBalancerType(name="lb11"),
    location=Location("hel1"),
    services=[
        LoadBalancerService(
            protocol="http",
            listen_port=8080,
            destination_port=8080,
            proxyprotocol=False,
            health_check=LoadBalancerHealthCheck(
                protocol="http",
                port="8080",
                interval=15,
                timeout=10,
                retries=3,
                http=LoadBalancerHealtCheckHttp(
                    path="/factors/10",
                    status_codes=["2??", "3??"],
                    tls=False
                )
            ),
        )
    ],
    targets=loadbalancer_targets,
    public_interface=True,
    network=vnet
)

loadbalancer.action.wait_until_finished()
print(f"Tworzenie loadbalancera: {loadbalancer.action.complete}")

load_balancer = client.load_balancers.get_by_name(f"{PREFIX}-loadbalancer")
print(f"Adres webserwisu: http://{load_balancer.data_model.public_net.ipv4.ip}:8080/factors/")