4.3 Hetzner solution

.gitignore

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+__pycache__
+ssh_key.txt

README.md

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-# 434708-PZC-4.3
+## Wymagania
+1. Python3
+2. pip3
+## Instrukcja krok po kroku
+1. Instalacja wymaganych pakietów.
+```
+pip3 install -r requirements.txt
+```
+2. Utworzyć plik 'ssh_key.txt' i umieścić w nim klucz, który zostanie użyty do dostępu do maszyny.
+3. Uruchomienie skryptu tworzącego maszyny oraz load balancer, jako argument podać klucz API Hetzner.
+```
+python3 deploy.py <api-key>
+```
+4. Usunięcie utworzonej zasobów (opcjonalne).
+```
+python3 remove.py <api-key>
+```
 

cloud-init

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+#cloud-config
+
+runcmd:
+  - wget https://git.wmi.amu.edu.pl/s470611/DPZC-aws/raw/branch/master/webservice
+  - chmod +x webservice
+  - ./webservice

constants.py

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+SSH_KEY_FNAME = "ssh_key.txt"
+CLOUD_INIT_FNAME = "cloud-init"
+
+SSH_KEY_NAME = "434708-4.3"
+
+IP_RANGE = "10.10.10.0/24"
+NETWORK_ZONE = "eu-central"
+NETWORK_TYPE = "cloud"
+VNET_NAME = "434708-4.3-vnet"
+
+SERVER_NAME_1 = "434708-4.3-1"
+SERVER_NAME_2 = "434708-4.3-2"
+
+MACHINE_TYPE = "cpx11"
+MACHINE_OS = "ubuntu-20.04"
+
+LOAD_BALANCER_NAME = "434708-4.3-lb"
+LOAD_BALANCER_ALG = "least_connections"
+LB_TYPE = "lb11"
+
+LOCATION = "hel1"

deploy.py

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+import sys
+from constants import *
+from hcloud import Client
+from hcloud.locations.domain import Location
+from hcloud.networks.domain import NetworkSubnet
+from hcloud.images.domain import Image
+from hcloud.server_types.domain import ServerType
+from hcloud.load_balancer_types.domain import LoadBalancerType
+from hcloud.load_balancers.domain import LoadBalancerAlgorithm
+from hcloud.load_balancers.domain import LoadBalancerService
+from hcloud.load_balancers.domain import LoadBalancerServiceHttp
+from hcloud.load_balancers.domain import LoadBalancerHealthCheck
+from hcloud.load_balancers.domain import LoadBalancerHealtCheckHttp
+from hcloud.load_balancers.domain import LoadBalancerTarget
+
+with open(SSH_KEY_FNAME, "r") as file:
+    ssh_key_text = file.read()
+    
+with open(CLOUD_INIT_FNAME, "r") as file:
+    cloud_init = file.read()
+
+if len(sys.argv) < 2:
+    raise ValueError("API key must be provided as an argument!")
+
+client = Client(
+    token=str(sys.argv[1])
+)
+
+# ssh key
+if client.ssh_keys.get_by_name(SSH_KEY_NAME):
+    ssh_key = client.ssh_keys.get_by_name(SSH_KEY_NAME)
+else:
+    ssh_key = client.ssh_keys.create(name=SSH_KEY_NAME, public_key=ssh_key_text)
+
+print(f"Klucz {ssh_key.data_model.name} został utworzony.")
+
+# network
+if client.networks.get_by_name(VNET_NAME):
+    vnet = client.networks.get_by_name(VNET_NAME)
+else:
+    vnet = client.networks.create(
+        name=VNET_NAME, 
+        ip_range=IP_RANGE, 
+        subnets=[
+            NetworkSubnet(ip_range=IP_RANGE, network_zone=NETWORK_ZONE, type=NETWORK_TYPE)
+        ]
+    )
+
+print(f"Utworzono sieć wirtualną: {vnet.data_model.name} ({vnet.data_model.ip_range})")
+    
+# webservice_1
+if(client.servers.get_by_name(SERVER_NAME_1)):
+    webservice_1 = client.servers.get_by_name(SERVER_NAME_1)
+else:
+    webservice_1_response = client.servers.create(
+        name=SERVER_NAME_1, 
+        server_type=ServerType(MACHINE_TYPE), 
+        image=Image(name=MACHINE_OS), 
+        ssh_keys=[ssh_key], 
+        networks=[vnet], 
+        location=Location(LOCATION), 
+        user_data=cloud_init
+    )
+    webservice_1_response.action.wait_until_finished()
+    webservice_1 = webservice_1_response.server
+
+print(f"Utworzono webservice 1: {webservice_1.data_model.name} ({webservice_1.data_model.public_net.ipv4.ip})")
+    
+# webservice_2
+if(client.servers.get_by_name(SERVER_NAME_2)):
+    webservice_2 = client.servers.get_by_name(SERVER_NAME_2)
+else:
+    webservice_2_response = client.servers.create(
+        name=SERVER_NAME_2, 
+        server_type=ServerType(MACHINE_TYPE), 
+        image=Image(name=MACHINE_OS), 
+        ssh_keys=[ssh_key], 
+        networks=[vnet], 
+        location=Location(LOCATION), 
+        user_data=cloud_init
+    )
+    webservice_2_response.action.wait_until_finished()
+    webservice_2 = webservice_2_response.server
+
+print(f"Utworzono webservice 2: {webservice_2.data_model.name} ({webservice_2.data_model.public_net.ipv4.ip})")
+
+# load balance service health check http
+lb_health_check_http = LoadBalancerHealtCheckHttp(
+    path="/factors/10",
+    status_codes=["2??", "3??"],
+    tls=False,
+)
+
+# load balance service health check
+lb_health_check = LoadBalancerHealthCheck(
+    protocol="http",
+    port="8080",
+    interval=10,
+    timeout=6,
+    retries=3,
+    http=lb_health_check_http
+)
+
+# load balance http
+lb_service_http = LoadBalancerServiceHttp(
+    cookie_name="HCLBSTICKY",
+    cookie_lifetime="300",
+    certificates=[],
+    redirect_http=False,
+    sticky_sessions=False,
+)
+
+# load balancer service
+lb_service = LoadBalancerService(
+    protocol="http",
+    listen_port="8080",
+    destination_port="8080",
+    proxyprotocol=False,
+    health_check=lb_health_check,
+    http=lb_service_http
+)
+
+# webservice_1 target
+webservice_1_target = LoadBalancerTarget(
+    type="server",
+    server=webservice_1,
+    use_private_ip=True
+)
+
+# webservice_2 target
+webservice_2_target = LoadBalancerTarget(
+    type="server",
+    server=webservice_2,
+    use_private_ip=True
+)
+
+# load balancer
+if(client.load_balancers.get_by_name(LOAD_BALANCER_NAME)):
+    load_balancer = client.load_balancers.get_by_name(LOAD_BALANCER_NAME)
+else:
+    load_balancer_response = client.load_balancers.create(
+        name=LOAD_BALANCER_NAME, 
+        load_balancer_type=LoadBalancerType(name=LB_TYPE),
+        location=Location(LOCATION),
+        algorithm=LoadBalancerAlgorithm(LOAD_BALANCER_ALG),
+        services=[lb_service],
+        targets=[webservice_1_target, webservice_2_target],
+        public_interface=True,
+        network=vnet 
+    )
+    load_balancer_response.action.wait_until_finished()
+    load_balancer = client.load_balancers.get_by_name(LOAD_BALANCER_NAME)
+
+print(f"Utworzono load balancer: {load_balancer.data_model.name} ({load_balancer.data_model.public_net.ipv4.ip}:8080)")
+

remove.py

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+import sys
+from constants import *
+from hcloud import Client
+
+if len(sys.argv) < 2:
+    raise ValueError("API key must be provided as an argument!")
+
+client = Client(
+    token=str(sys.argv[1])
+)
+
+ssh_key = client.ssh_keys.get_by_name(SSH_KEY_NAME)
+vnet = client.networks.get_by_name(VNET_NAME)
+webservice_1 = client.servers.get_by_name(SERVER_NAME_1)
+webservice_2 = client.servers.get_by_name(SERVER_NAME_2)
+load_balancer = client.load_balancers.get_by_name(LOAD_BALANCER_NAME)
+
+if load_balancer:
+   load_balancer.delete()
+if webservice_1:
+    webservice_1.delete()
+if webservice_2:
+    webservice_2.delete()
+if vnet:
+    vnet.delete()
+if ssh_key:
+    ssh_key.delete()

requirements.txt

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+hcloud==1.16.0