homelab-nomad/scripts/nomad_orphan_services.py

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#! /usr/bin/env python3
from argparse import ArgumentParser
from os import environ
from typing import Any
from typing import cast
import requests
NOMAD_ADDR = environ.get("NOMAD_ADDR", "http://127.0.0.1:4646")
NOMAD_TOKEN = environ.get("NOMAD_TOKEN")
def nomad_req(
*path: str, params: dict[str, Any] | None = None, method="GET"
) -> list[dict[str, Any]] | dict[str, Any] | str:
headers = {}
if NOMAD_TOKEN:
headers["X-Nomad-Token"] = NOMAD_TOKEN
response = requests.request(
method,
f"{NOMAD_ADDR}/v1/{'/'.join(path)}",
params=params,
headers=headers,
)
response.raise_for_status()
try:
return response.json()
except requests.exceptions.JSONDecodeError:
return response.text
exit_code = 0
parser = ArgumentParser(
description="Checks for orphaned services and optionally deletes them.",
)
parser.add_argument("-d", "--delete", action="store_true", help="Delete orphan services")
args = parser.parse_args()
for namespace in nomad_req("services"):
namespace = cast(dict[str, Any], namespace)
for service in namespace["Services"]:
service_name = service["ServiceName"]
for service_instance in nomad_req("service", service_name):
service_instance = cast(dict[str, Any], service_instance)
service_id = service_instance["ID"]
alloc_id = service_instance["AllocID"]
alloc_found = True
try:
alloc = nomad_req("allocation", alloc_id)
continue
except requests.exceptions.HTTPError as e:
if e.response.status_code == 404:
alloc_found = False
message = f"alloc {alloc_id} not found for {service_name}."
if args.delete:
message += f" Deleting {service_id}"
print(message)
else:
raise e
if not alloc_found and args.delete:
nomad_req("service", service_name, service_id, method="DELETE")
exit(exit_code)