forked from bortzmeyer/check_expire
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Stephane Bortzmeyer
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README.md
31
README.md
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# check_expire
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A Nagios (and compatible) plugin to check the impending expiration of a domain name. It relies on RDAP exclusively (no whois) and works with every top-level domain with RDAP (which includes all the ICANN ones).
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A Nagios (and compatible) plugin to check the impending expiration of a domain name. It relies on RDAP exclusively (no whois) and works with every top-level domain with RDAP (which includes all the ICANN ones).
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## Usage
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check_expire follows the usual Nagios rules. The options are:
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* -H: domain name to monitor
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* -c: critical threshold in days
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* -w: warning threshold in days
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* -v: verbose details in output
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## Installation
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You need Python 3 and [Requests](http://python-requests.org/). You can install Requests, for instance, with pip `pip3 install requests`.
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Then, copy the script `check_expire` and the file `ianardap.py`to the directory of local plugins.
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## License
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GPL. See LICENSE.
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## Authors
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Stéphane Bortzmeyer <stephane+chapril@bortzmeyer.org>.
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## Reference site
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https://forge.chapril.org/bortzmeyer/check_expire Use the Gitea issue tracker to report bugs or wishes.
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#!/usr/bin/env python3
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"""Monitoring plugin (Nagios-compatible) to check the impeding
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expiration of a domain name, through RDAP.
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The monitoring plugin API is documented at
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<https://www.monitoring-plugins.org/doc/guidelines.html>.
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"""
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import sys
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import json
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import datetime
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import getopt
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import re
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# http://python-requests.org/ for easier HTTPS retrieval
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import requests
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# Local module
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import ianardap
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VERSION = "0.0"
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# Funny diversity in RDAP servers' output...
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RFC3339 = "%Y-%m-%dT%H:%M:%SZ%z"
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RFC3339TZ = "%Y-%m-%dT%H:%M:%S%z" # We cannot use it directly, Python uses HHMM as offset, not HH:MM as RFC 3339 does :-(
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RFC3339LONG = "%Y-%m-%dT%H:%M:%S.%fZ%z" # Microseconds support (%f) does not seem documented
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UTCINFO = datetime.timezone(offset=datetime.timedelta(seconds=0))
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# Do not touch
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# https://www.monitoring-plugins.org/doc/guidelines.html#AEN78
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STATE_OK = 0
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STATE_WARNING = 1
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STATE_CRITICAL = 2
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STATE_UNKNOWN = 3
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STATE_DEPENDENT = 4
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# Can be changed on the command-line
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verbose = False
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domain = None
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critical_t = datetime.timedelta(days=2)
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warning_t = datetime.timedelta(days=7)
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# TODO implement timeout for HTTPS requests. -t option. Does Requests allow it?
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def usage(msg=None):
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print("Usage: %s -H domain-name [-c critical -w warning]" % sys.argv[0], end="")
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if msg is not None and msg != "":
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print(" (%s)" % msg)
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else:
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print("")
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def details():
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if verbose:
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print(" RDAP database \"%s\", version %s published on %s, RDAP server is %s" % \
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(database.description, database.version, database.publication, server))
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else:
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print("")
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def error(msg=None):
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if msg is None:
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msg = "Unknown error"
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print("%s CRITICAL: %s" % (domain, msg), end="")
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details()
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sys.exit(STATE_CRITICAL)
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def warning(msg=None):
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if msg is None:
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msg = "Unknown warning"
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print("%s WARNING: %s" % (domain, msg), end="")
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details()
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sys.exit(STATE_WARNING)
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def ok(msg=None):
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if msg is None:
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msg = "Unknown message but everything is OK"
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print("%s OK: %s" % (domain, msg), end="")
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details()
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sys.exit(STATE_OK)
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try:
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optlist, args = getopt.getopt (sys.argv[1:], "c:hH:vVw:",
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["critical=", "expiration", "help", "verbose", "version", "warning="])
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for option, value in optlist:
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if option == "--critical" or option == "-c":
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critical_t = datetime.timedelta(days=int(value))
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elif option == "--help" or option == "-h":
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usage()
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sys.exit(STATE_OK)
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elif option == "--hostname" or option == "-H":
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domain = value
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elif option == "--verbose" or option == "-v":
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verbose = True
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elif option == "--version" or option == "-V":
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print("%s version %s" % (sys.argv[0], VERSION))
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sys.exit(STATE_OK)
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elif option == "--warning" or option == "-w":
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warning_t = datetime.timedelta(days=int(value))
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else:
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# Should never occur, it is trapped by getopt
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print("Unknown option %s" % option)
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sys.exit(STATE_UNKNOWN)
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except getopt.error as reason:
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usage(reason)
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sys.exit(STATE_UNKNOWN)
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if len(args) != 0:
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usage("Extraneous arguments")
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sys.exit(STATE_UNKNOWN)
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if domain is None:
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usage("-H is mandatory")
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sys.exit(STATE_UNKNOWN)
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database = ianardap.IanaRDAPDatabase()
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server = database.find(domain)
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if server is None:
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error("No RDAP server found for %s" % domain)
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if server.endswith("/"):
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server = server[:-1] # Donuts RDAP server balks when there are two slashes and reply 404
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response = requests.get("%s/domain/%s" % (server, domain))
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if response.status_code != 200:
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error("Invalid RDAP return code: %s" % response.status_code)
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rdap = json.loads(response.content)
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for event in rdap["events"]:
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if event["eventAction"] == "expiration":
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try:
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expiration = datetime.datetime.strptime(event["eventDate"] + "+0000", RFC3339LONG)
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except ValueError:
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try:
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expiration = datetime.datetime.strptime(event["eventDate"] + "+0000", RFC3339)
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except ValueError:
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# Python standard library offers no way to parse all RFC3339-compliant datetimes, so we have to hack.
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if re.search(r"\+[0-9]{2}:[0-9]{2}$", event["eventDate"]):
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dt = re.sub(r"\+([0-9]{2}):([0-9]{2})$", r"+\1\2", event["eventDate"])
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expiration = datetime.datetime.strptime(dt, RFC3339TZ)
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else:
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print("No recognized format for datetime \"%s\"" % event["eventDate"])
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sys.exit(STATE_UNKNOWN)
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now = datetime.datetime.now(tz=UTCINFO)
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if expiration < now:
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error("domain %s is already expired (%s ago)" % (domain, (now-expiration)))
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rest = expiration-now
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if rest < critical_t:
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error("expires in %s, HURRY UP!!!" % (rest))
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elif rest < warning_t:
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warning("expires in %s, renew now" % (rest))
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else:
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ok("expires in %s." % (rest))
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error("No expiration found")
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#!/usr/bin/env python3
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"""A simple module to get the RDAP server for a given domain name,
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from the IANA database specified in RFC 7484.
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"""
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# http://python-requests.org/ for easier HTTPS retrieval
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import requests
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import datetime
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import json
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import os
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import sys
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IANABASE = "https://data.iana.org/rdap/dns.json"
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CACHE = os.environ["HOME"] + "/.ianardapcache.json"
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MAXAGE = 24 # Hours
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class IanaRDAPDatabase():
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def __init__(self, maxage=MAXAGE, cachefile=CACHE):
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""" Retrieves the IANA databse, if not already cached. maxage is in hours. """
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cache_valid = False
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# TODO we should lock it
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if os.path.exists(cachefile) and \
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datetime.datetime.fromtimestamp(os.path.getmtime(cachefile)) >= \
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(datetime.datetime.utcnow() - datetime.timedelta(hours = maxage)):
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cache = open(cachefile, "rb")
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content = cache.read()
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cache.close()
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cache_valid = True
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else:
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response = requests.get(IANABASE)
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if response.status_code != 200:
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raise Exception("Invalid HTTPS return code when trying to get %s: %s" % (IANABASE, response.status_code))
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content = response.content
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database = json.loads(content)
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self.description = database["description"]
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self.publication = database["publication"]
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self.version = database["version"]
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self.services = {}
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for service in database["services"]:
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for tld in service[0]:
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for server in service[1]:
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self.services[tld] = server
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if not cache_valid:
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# TODO we should lock it
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cache = open(cachefile, "wb")
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cache.write(content)
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cache.close()
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def find(self, domain):
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""" Get the RDAP server for a given domain name. None if there is none."""
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labels = domain.split(".")
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tld = labels[len(labels)-1]
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if tld in self.services:
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return self.services[tld]
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else:
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return None
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if __name__ == "__main__":
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rdap = IanaRDAPDatabase(maxage=1)
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print("Database \"%s\", version %s published on %s, %i services" % \
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(rdap.description, rdap.version, rdap.publication, len(rdap.services)))
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for domain in sys.argv[1:]:
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print("%s -> %s" % (domain, rdap.find(domain)))
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# Run these tests from test_exe_matrix (reference Web site is
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# <https://framagit.org/feth/test_exe_matrix>). You can install it
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# with 'pip3 install test_exe_matrix'.
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---
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config:
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timeout: 20
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tests:
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- exe: './check_expire'
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args:
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- '-h'
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retcode: 0
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partstdout: '-H domain-name'
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- exe: './check_expire'
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args:
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- '--zzz'
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retcode: 3
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partstdout: 'option --zzz not recognized'
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- exe: './check_expire'
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args:
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- '-c'
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- 'foobar'
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- '-H'
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- 'bortzmeyer.org'
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retcode: 1
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partstderr: 'ValueError'
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# 2021-07-05: no RDAP server for this TLD
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- exe: './check_expire'
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args:
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- '-H'
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- 'bie.re'
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retcode: 2
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partstdout: 'No RDAP server'
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# 2021-07-05: no expiration in RDAP for this TLD (but there is one
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# in whois)
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- exe: './check_expire'
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args:
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- '-H'
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- 'hopkaup.is'
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retcode: 2
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partstdout: 'No expiration found'
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- exe: './check_expire'
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args:
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- '-H'
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- 'bortzmeyer.org'
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retcode: 0
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stderr: ''
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partstdout: 'OK'
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- exe: './check_expire'
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args:
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- '-v'
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- '-H'
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- 'bortzmeyer.org'
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retcode: 0
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stderr: ''
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partstdout: 'RDAP server is'
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- exe: './check_expire'
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args:
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- '-c'
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- '1000'
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- '-H'
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- 'sources.org'
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retcode: 2
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stderr: ''
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partstdout: 'HURRY UP'
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- exe: './check_expire'
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args:
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- '-w'
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- '1000'
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- '-H'
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- 'sources.org'
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retcode: 1
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stderr: ''
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partstdout: 'renew now'
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# Now, test various RDAP servers
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# Verisign
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- exe: './check_expire'
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args:
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- '-H'
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- 'nagios.com'
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retcode: 0
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stderr: ''
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# CentralNIC
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- exe: './check_expire'
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args:
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- '-H'
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- 'botsin.space'
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retcode: 0
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stderr: ''
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# Fred
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- exe: './check_expire'
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args:
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- '-H'
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- 'turris.cz'
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retcode: 0
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stderr: ''
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# Afnic
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- exe: './check_expire'
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args:
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- '-H'
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- 'brest.bzh'
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retcode: 0
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stderr: ''
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# Donuts
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- exe: './check_expire'
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args:
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- '-H'
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- 'mastodon.social'
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retcode: 0
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stderr: ''
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# Iran, expiration date in the past
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- exe: './check_expire'
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args:
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- '-H'
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- 'nic.pars'
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retcode: 2
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partstdout: "already expired"
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stderr: ''
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# Brazil
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- exe: './check_expire'
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args:
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- '-H'
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- 'nic.globo'
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retcode: 0
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stderr: ''
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# Fury (Canada)
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- exe: './check_expire'
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args:
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- '-H'
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- 'blackbox.kiwi'
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retcode: 0
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stderr: ''
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# JPRS
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- exe: './check_expire'
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args:
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- '-H'
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- 'nic.jprs'
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retcode: 0
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stderr: ''
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# Nominet
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- exe: './check_expire'
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args:
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- '-H'
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- 'nic.abogado'
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retcode: 0
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stderr: ''
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# .at
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- exe: './check_expire'
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args:
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- '-H'
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- 'nic.wien'
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retcode: 0
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stderr: ''
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