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ansible-collection-hetzner-.../plugins/modules/hcloud_load_balancer_service.py
Jonas L 6844317920
refactor: fix pylint invalid variable name (#312) 
##### SUMMARY

Pylint complains about too short/meaningless variable names. We want to
be explicit when naming variables.
2023-08-25 16:19:15 +02:00

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#!/usr/bin/python
# Copyright: (c) 2020, Hetzner Cloud GmbH <info@hetzner-cloud.de>
# GNU General Public License v3.0+ (see COPYING or https://www.gnu.org/licenses/gpl-3.0.txt)
DOCUMENTATION = """
---
module: hcloud_load_balancer_service
short_description: Create and manage the services of cloud Load Balancers on the Hetzner Cloud.
description:
- Create, update and manage the services of cloud Load Balancers on the Hetzner Cloud.
author:
- Lukas Kaemmerling (@LKaemmerling)
version_added: 0.1.0
options:
load_balancer:
description:
- The Name of the Hetzner Cloud Load Balancer the service belongs to
type: str
required: true
listen_port:
description:
- The port the service listens on, i.e. the port users can connect to.
type: int
required: true
destination_port:
description:
- The port traffic is forwarded to, i.e. the port the targets are listening and accepting connections on.
- Required if services does not exist and protocol is tcp.
type: int
protocol:
description:
- Protocol of the service.
- Required if Load Balancer does not exist.
type: str
choices: [ http, https, tcp ]
proxyprotocol:
description:
- Enable the PROXY protocol.
type: bool
default: False
http:
description:
- Configuration for HTTP and HTTPS services
type: dict
suboptions:
cookie_name:
description:
- Name of the cookie which will be set when you enable sticky sessions
type: str
cookie_lifetime:
description:
- Lifetime of the cookie which will be set when you enable sticky sessions, in seconds
type: int
certificates:
description:
- List of Names or IDs of certificates
type: list
elements: str
sticky_sessions:
description:
- Enable or disable sticky_sessions
type: bool
default: False
redirect_http:
description:
- Redirect Traffic from Port 80 to Port 443, only available if protocol is https
type: bool
default: False
health_check:
description:
- Configuration for health checks
type: dict
suboptions:
protocol:
description:
- Protocol the health checks will be performed over
type: str
choices: [ http, https, tcp ]
port:
description:
- Port the health check will be performed on
type: int
interval:
description:
- Interval of health checks, in seconds
type: int
timeout:
description:
- Timeout of health checks, in seconds
type: int
retries:
description:
- Number of retries until a target is marked as unhealthy
type: int
http:
description:
- Additional Configuration of health checks with protocol http/https
type: dict
suboptions:
domain:
description:
- Domain we will set within the HTTP HOST header
type: str
path:
description:
- Path we will try to access
type: str
response:
description:
- Response we expect, if response is not within the health check response the target is unhealthy
type: str
status_codes:
description:
- List of HTTP status codes we expect to get when we perform the health check.
type: list
elements: str
tls:
description:
- Verify the TLS certificate, only available if health check protocol is https
type: bool
default: False
state:
description:
- State of the Load Balancer.
default: present
choices: [ absent, present ]
type: str
extends_documentation_fragment:
- hetzner.hcloud.hcloud
requirements:
- hcloud-python >= 1.8.1
"""
EXAMPLES = """
- name: Create a basic Load Balancer service with Port 80
hetzner.hcloud.hcloud_load_balancer_service:
load_balancer: my-load-balancer
protocol: http
listen_port: 80
state: present
- name: Ensure the Load Balancer is absent (remove if needed)
hetzner.hcloud.hcloud_load_balancer_service:
load_balancer: my-Load Balancer
protocol: http
listen_port: 80
state: absent
"""
RETURN = """
hcloud_load_balancer_service:
description: The Load Balancer service instance
returned: Always
type: complex
contains:
load_balancer:
description: The name of the Load Balancer where the service belongs to
returned: always
type: str
sample: my-load-balancer
listen_port:
description: The port the service listens on, i.e. the port users can connect to.
returned: always
type: int
sample: 443
protocol:
description: Protocol of the service
returned: always
type: str
sample: http
destination_port:
description:
- The port traffic is forwarded to, i.e. the port the targets are listening and accepting connections on.
returned: always
type: int
sample: 80
proxyprotocol:
description:
- Enable the PROXY protocol.
returned: always
type: bool
sample: false
http:
description: Configuration for HTTP and HTTPS services
returned: always
type: complex
contains:
cookie_name:
description: Name of the cookie which will be set when you enable sticky sessions
returned: always
type: str
sample: HCLBSTICKY
cookie_lifetime:
description: Lifetime of the cookie which will be set when you enable sticky sessions, in seconds
returned: always
type: int
sample: 3600
certificates:
description: List of Names or IDs of certificates
returned: always
type: list
elements: str
sticky_sessions:
description: Enable or disable sticky_sessions
returned: always
type: bool
sample: true
redirect_http:
description: Redirect Traffic from Port 80 to Port 443, only available if protocol is https
returned: always
type: bool
sample: false
health_check:
description: Configuration for health checks
returned: always
type: complex
contains:
protocol:
description: Protocol the health checks will be performed over
returned: always
type: str
sample: http
port:
description: Port the health check will be performed on
returned: always
type: int
sample: 80
interval:
description: Interval of health checks, in seconds
returned: always
type: int
sample: 15
timeout:
description: Timeout of health checks, in seconds
returned: always
type: int
sample: 10
retries:
description: Number of retries until a target is marked as unhealthy
returned: always
type: int
sample: 3
http:
description: Additional Configuration of health checks with protocol http/https
returned: always
type: complex
contains:
domain:
description: Domain we will set within the HTTP HOST header
returned: always
type: str
sample: example.com
path:
description: Path we will try to access
returned: always
type: str
sample: /
response:
description: Response we expect, if response is not within the health check response the target is unhealthy
returned: always
type: str
status_codes:
description: List of HTTP status codes we expect to get when we perform the health check.
returned: always
type: list
elements: str
sample: ["2??","3??"]
tls:
description: Verify the TLS certificate, only available if health check protocol is https
returned: always
type: bool
sample: false
"""
from ansible.module_utils.basic import AnsibleModule
from ansible.module_utils.common.text.converters import to_native
from ..module_utils.hcloud import AnsibleHCloud
from ..module_utils.vendor.hcloud import APIException, HCloudException
from ..module_utils.vendor.hcloud.load_balancers.domain import (
LoadBalancerHealtCheckHttp,
LoadBalancerHealthCheck,
LoadBalancerService,
LoadBalancerServiceHttp,
)
class AnsibleHCloudLoadBalancerService(AnsibleHCloud):
def __init__(self, module):
super().__init__(module, "hcloud_load_balancer_service")
self.hcloud_load_balancer = None
self.hcloud_load_balancer_service = None
def _prepare_result(self):
http = None
if self.hcloud_load_balancer_service.protocol != "tcp":
http = {
"cookie_name": to_native(self.hcloud_load_balancer_service.http.cookie_name),
"cookie_lifetime": self.hcloud_load_balancer_service.http.cookie_name,
"redirect_http": self.hcloud_load_balancer_service.http.redirect_http,
"sticky_sessions": self.hcloud_load_balancer_service.http.sticky_sessions,
"certificates": [
to_native(certificate.name) for certificate in self.hcloud_load_balancer_service.http.certificates
],
}
health_check = {
"protocol": to_native(self.hcloud_load_balancer_service.health_check.protocol),
"port": self.hcloud_load_balancer_service.health_check.port,
"interval": self.hcloud_load_balancer_service.health_check.interval,
"timeout": self.hcloud_load_balancer_service.health_check.timeout,
"retries": self.hcloud_load_balancer_service.health_check.retries,
}
if self.hcloud_load_balancer_service.health_check.protocol != "tcp":
health_check["http"] = {
"domain": to_native(self.hcloud_load_balancer_service.health_check.http.domain),
"path": to_native(self.hcloud_load_balancer_service.health_check.http.path),
"response": to_native(self.hcloud_load_balancer_service.health_check.http.response),
"certificates": [
to_native(status_code)
for status_code in self.hcloud_load_balancer_service.health_check.http.status_codes
],
"tls": self.hcloud_load_balancer_service.health_check.http.tls,
}
return {
"load_balancer": to_native(self.hcloud_load_balancer.name),
"protocol": to_native(self.hcloud_load_balancer_service.protocol),
"listen_port": self.hcloud_load_balancer_service.listen_port,
"destination_port": self.hcloud_load_balancer_service.destination_port,
"proxyprotocol": self.hcloud_load_balancer_service.proxyprotocol,
"http": http,
"health_check": health_check,
}
def _get_load_balancer(self):
try:
load_balancer_name = self.module.params.get("load_balancer")
self.hcloud_load_balancer = self.client.load_balancers.get_by_name(load_balancer_name)
if not self.hcloud_load_balancer:
self.module.fail_json(msg=f"Load balancer does not exist: {load_balancer_name}")
self._get_load_balancer_service()
except HCloudException as exception:
self.fail_json_hcloud(exception)
def _create_load_balancer_service(self):
self.module.fail_on_missing_params(required_params=["protocol"])
if self.module.params.get("protocol") == "tcp":
self.module.fail_on_missing_params(required_params=["destination_port"])
params = {
"protocol": self.module.params.get("protocol"),
"listen_port": self.module.params.get("listen_port"),
"proxyprotocol": self.module.params.get("proxyprotocol"),
}
if self.module.params.get("destination_port"):
params["destination_port"] = self.module.params.get("destination_port")
if self.module.params.get("http"):
params["http"] = self.__get_service_http(http_arg=self.module.params.get("http"))
if self.module.params.get("health_check"):
params["health_check"] = self.__get_service_health_checks(
health_check=self.module.params.get("health_check")
)
if not self.module.check_mode:
try:
self.hcloud_load_balancer.add_service(LoadBalancerService(**params)).wait_until_finished(
max_retries=1000
)
except HCloudException as exception:
self.fail_json_hcloud(exception)
self._mark_as_changed()
self._get_load_balancer()
self._get_load_balancer_service()
def __get_service_http(self, http_arg):
service_http = LoadBalancerServiceHttp(certificates=[])
if http_arg.get("cookie_name") is not None:
service_http.cookie_name = http_arg.get("cookie_name")
if http_arg.get("cookie_lifetime") is not None:
service_http.cookie_lifetime = http_arg.get("cookie_lifetime")
if http_arg.get("sticky_sessions") is not None:
service_http.sticky_sessions = http_arg.get("sticky_sessions")
if http_arg.get("redirect_http") is not None:
service_http.redirect_http = http_arg.get("redirect_http")
if http_arg.get("certificates") is not None:
certificates = http_arg.get("certificates")
if certificates is not None:
for certificate in certificates:
hcloud_cert = None
try:
try:
hcloud_cert = self.client.certificates.get_by_name(certificate)
except Exception:
hcloud_cert = self.client.certificates.get_by_id(certificate)
except HCloudException as exception:
self.fail_json_hcloud(exception)
service_http.certificates.append(hcloud_cert)
return service_http
def __get_service_health_checks(self, health_check):
service_health_check = LoadBalancerHealthCheck()
if health_check.get("protocol") is not None:
service_health_check.protocol = health_check.get("protocol")
if health_check.get("port") is not None:
service_health_check.port = health_check.get("port")
if health_check.get("interval") is not None:
service_health_check.interval = health_check.get("interval")
if health_check.get("timeout") is not None:
service_health_check.timeout = health_check.get("timeout")
if health_check.get("retries") is not None:
service_health_check.retries = health_check.get("retries")
if health_check.get("http") is not None:
health_check_http = health_check.get("http")
service_health_check.http = LoadBalancerHealtCheckHttp()
if health_check_http.get("domain") is not None:
service_health_check.http.domain = health_check_http.get("domain")
if health_check_http.get("path") is not None:
service_health_check.http.path = health_check_http.get("path")
if health_check_http.get("response") is not None:
service_health_check.http.response = health_check_http.get("response")
if health_check_http.get("status_codes") is not None:
service_health_check.http.status_codes = health_check_http.get("status_codes")
if health_check_http.get("tls") is not None:
service_health_check.http.tls = health_check_http.get("tls")
return service_health_check
def _update_load_balancer_service(self):
changed = False
try:
params = {
"listen_port": self.module.params.get("listen_port"),
}
if self.module.params.get("destination_port") is not None:
if self.hcloud_load_balancer_service.destination_port != self.module.params.get("destination_port"):
params["destination_port"] = self.module.params.get("destination_port")
changed = True
if self.module.params.get("protocol") is not None:
if self.hcloud_load_balancer_service.protocol != self.module.params.get("protocol"):
params["protocol"] = self.module.params.get("protocol")
changed = True
if self.module.params.get("proxyprotocol") is not None:
if self.hcloud_load_balancer_service.proxyprotocol != self.module.params.get("proxyprotocol"):
params["proxyprotocol"] = self.module.params.get("proxyprotocol")
changed = True
if self.module.params.get("http") is not None:
params["http"] = self.__get_service_http(http_arg=self.module.params.get("http"))
changed = True
if self.module.params.get("health_check") is not None:
params["health_check"] = self.__get_service_health_checks(
health_check=self.module.params.get("health_check")
)
changed = True
if not self.module.check_mode:
self.hcloud_load_balancer.update_service(LoadBalancerService(**params)).wait_until_finished(
max_retries=1000
)
except HCloudException as exception:
self.fail_json_hcloud(exception)
self._get_load_balancer()
if changed:
self._mark_as_changed()
def _get_load_balancer_service(self):
for service in self.hcloud_load_balancer.services:
if self.module.params.get("listen_port") == service.listen_port:
self.hcloud_load_balancer_service = service
def present_load_balancer_service(self):
self._get_load_balancer()
if self.hcloud_load_balancer_service is None:
self._create_load_balancer_service()
else:
self._update_load_balancer_service()
def delete_load_balancer_service(self):
try:
self._get_load_balancer()
if self.hcloud_load_balancer_service is not None:
if not self.module.check_mode:
try:
self.hcloud_load_balancer.delete_service(self.hcloud_load_balancer_service).wait_until_finished(
max_retries=1000
)
except HCloudException as exception:
self.fail_json_hcloud(exception)
self._mark_as_changed()
self.hcloud_load_balancer_service = None
except APIException as exception:
self.fail_json_hcloud(exception)
@classmethod
def define_module(cls):
return AnsibleModule(
argument_spec=dict(
load_balancer={"type": "str", "required": True},
listen_port={"type": "int", "required": True},
destination_port={"type": "int"},
protocol={
"type": "str",
"choices": ["http", "https", "tcp"],
},
proxyprotocol={"type": "bool", "default": False},
http={
"type": "dict",
"options": dict(
cookie_name={"type": "str"},
cookie_lifetime={"type": "int"},
sticky_sessions={"type": "bool", "default": False},
redirect_http={"type": "bool", "default": False},
certificates={"type": "list", "elements": "str"},
),
},
health_check={
"type": "dict",
"options": dict(
protocol={
"type": "str",
"choices": ["http", "https", "tcp"],
},
port={"type": "int"},
interval={"type": "int"},
timeout={"type": "int"},
retries={"type": "int"},
http={
"type": "dict",
"options": dict(
domain={"type": "str"},
path={"type": "str"},
response={"type": "str"},
status_codes={"type": "list", "elements": "str"},
tls={"type": "bool", "default": False},
),
},
),
},
state={
"choices": ["absent", "present"],
"default": "present",
},
**super().base_module_arguments(),
),
supports_check_mode=True,
)
def main():
module = AnsibleHCloudLoadBalancerService.define_module()
hcloud = AnsibleHCloudLoadBalancerService(module)
state = module.params.get("state")
if state == "absent":
hcloud.delete_load_balancer_service()
elif state == "present":
hcloud.present_load_balancer_service()
module.exit_json(**hcloud.get_result())
if __name__ == "__main__":
main()
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