107 lines
2.6 KiB
Python
107 lines
2.6 KiB
Python
from typing import NamedTuple
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import re
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import sys
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import tomllib
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from pathlib import Path
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from typing import TypedDict
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from collections import defaultdict
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from urllib.request import urlopen
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import json
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TRAEFIK_HOST_RE = re.compile(r"Host\(`([a-z0-9\.-]+)`\)")
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CONFIG_FILE = Path.cwd() / "config.toml"
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OUTPUT_FILE = Path.cwd() / "map.txt"
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class Route(NamedTuple):
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name: str
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destination: str
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hostname: str
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class Source(TypedDict):
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type: str
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url: str
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destination: str
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class Config(TypedDict):
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source: list[Source]
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def parse_traefik_rule(rule: str) -> list[str]:
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if "Host(" not in rule:
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return []
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return TRAEFIK_HOST_RE.findall(rule)
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def get_traefik_routes(traefik_host: str, traefik_route: str):
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with urlopen(f"{traefik_host}/api/http/routers") as response:
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api_response = json.load(response)
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routes = set()
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for router in api_response:
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hosts = parse_traefik_rule(router["rule"])
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if not hosts:
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print(f"Failed to find host for {router['rule']}", file=sys.stderr)
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continue
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if len(hosts) > 1:
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print(f"WARNING: Found multiple hosts for rule: {router['rule']}", file=sys.stderr)
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routes.add(Route(
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router["service"],
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traefik_route,
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hosts[0]
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))
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return routes
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def get_dokku_routes(dokku_exporter_url: str, dokku_route: str):
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with urlopen(dokku_exporter_url) as response:
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api_response = json.load(response)
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routes = set()
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for app in api_response:
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for vhost in app["vhosts"]:
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routes.add(Route(
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app["app"],
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dokku_route,
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vhost
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))
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return routes
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def main():
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config: Config = tomllib.loads(CONFIG_FILE.read_text())
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routes = []
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for source in config["source"]:
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match source["type"]:
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case "traefik":
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routes.extend(get_traefik_routes(source["url"], source["destination"]))
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case "dokku":
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routes.extend(get_dokku_routes(source["url"], source["destination"]))
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if len(routes) != len(set(routes)):
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raise ValueError("Conflict found!")
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grouped_routes = defaultdict(set)
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for route in routes:
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grouped_routes[route.hostname, route.destination].add(route.name)
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with OUTPUT_FILE.open("w", buffering=1024 * 1024) as f:
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for (hostname, destination), names in sorted(grouped_routes.items()):
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print(f"{hostname}\t{destination}; # {', '.join(names)}", file=f)
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print("Found", len(routes), "routes, grouped into", len(grouped_routes), "groups")
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if __name__ == "__main__":
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main()
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