hetzner-webservice/deploy.py

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

import sys

prefix = "444380"
ssh_key_name = prefix+"-webservice-ssh-key"
subnet_name = prefix+"-webservice-subnet"
server_name = prefix+"-webservice-server"
load_balancer_name = prefix+"-webservice-loadbalancer"

public_key = sys.argv[2]
token = sys.argv[1]

server_count = 5

CLOUD_INIT = """#cloud-config
runcmd:
  - git clone https://git.wmi.amu.edu.pl/s444380/hetzner-webservice
  - cd hetzner-webservice
  - chmod +x webservice
  - ./webservice
"""

client = Client(
    token=token
)

print("Adding ssh-key...")
try:
    ssh_key = client.ssh_keys.create(name=ssh_key_name, public_key=public_key)
except:
    ssh_key = client.ssh_keys.get_by_name(name=ssh_key_name)
print(f"Added ssh-key {ssh_key.data_model.name} ||| {ssh_key.data_model.public_key} ")

print("Creating subnet...")
subnet = client.networks.create(
        name=subnet_name, 
        ip_range="10.10.10.0/24", 
        subnets=[
            NetworkSubnet(ip_range="10.10.10.0/24", network_zone="eu-central", type="cloud")
        ]
    )
print(f"Created network: {subnet.data_model.name} ({subnet.data_model.ip_range})")

targets = []

print("Creating servers...")
for i in range(server_count):
    server = client.servers.create(
        name=f"{server_name}-{i+1}", 
        server_type=ServerType("cx11"), 
        image=Image(name="ubuntu-20.04"), 
        ssh_keys=[ssh_key], 
        networks=[subnet], 
        location=Location("hel1"), 
        user_data=CLOUD_INIT
    )
    server.action.wait_until_finished()
    if server.action.complete:
        print(f"Created server: {server.server.name}")
    targets.append(LoadBalancerTarget(type="server", server=server.server, use_private_ip=True))
                   
load_balancer = client.load_balancers.create(
    name=load_balancer_name,
    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=targets,
    public_interface=True,
    network=subnet
)

load_balancer.action.wait_until_finished()
if load_balancer.action.complete:
    load_balancer = client.load_balancers.get_by_name(load_balancer_name)
    print(f"Load balancer is up. http://{load_balancer.data_model.public_net.ipv4.ip}:8080")