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atc0005 / check-whois

Go-based tooling to monitor WHOIS records.
MIT License
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domain expiration expiry go golang monitoring nagios nagios-plugin plugin whois

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check-whois

Go-based tooling to monitor WHOIS records.

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Table of Contents

Project home

See our GitHub repo for the latest code, to file an issue or submit improvements for review and potential inclusion into the project.

Overview

This repo is intended to provide various tools used to monitor WHOIS.

Tool Name Overall Status Description
check_whois Alpha Nagios plugin used to monitor expiration of WHOIS records

check_whois

Nagios plugin used to monitor expiration of WHOIS records.

The output for this application is designed to provide the one-line summary needed by Nagios for quick identification of a problem while providing longer, more detailed information for use in email and Teams notifications (atc0005/send2teams).

Performance Data

Initial support has been added for emitting Performance Data / Metrics, but refinement suggestions are welcome.

Consult the tables below for the metrics implemented thus far.

Please add to an existing Discussion thread (if applicable) or open a new one with any feedback that you may have. Thanks in advance!

Emitted Performance Data / Metric Unit of Measurement Meaning
time seconds Runtime for plugin
expiration days Until domain expires.
since_update days Since domain was last updated.
since_creation days Since domain was first created.

Features

Changelog

See the CHANGELOG.md file for the changes associated with each release of this application. Changes that have been merged to master, but not yet an official release may also be noted in the file under the Unreleased section. A helpful link to the Git commit history since the last official release is also provided for further review.

Requirements

The following is a loose guideline. Other combinations of Go and operating systems for building and running tools from this repo may work, but have not been tested.

Building source code

Running

Installation

From source

  1. Download Go
  2. Install Go
  3. Clone the repo
    1. cd /tmp
    2. git clone https://github.com/atc0005/check-whois
    3. cd check-whois
  4. Install dependencies (optional)
    • for Ubuntu Linux
      • sudo apt-get install make gcc
    • for CentOS Linux
      1. sudo yum install make gcc
  5. Build
    • for current operating system
      • go build -mod=vendor ./cmd/check_whois/
      • forces build to use bundled dependencies in top-level vendor folder
    • for all supported platforms (where make is installed)
      • make all
    • for Windows
      • make windows
    • for Linux
      • make linux
  6. Locate generated binaries
    • if using Makefile
      • look in /tmp/check-whois/release_assets/check_whois/
    • if using go build
      • look in /tmp/check-whois/
  7. Copy the applicable binaries to whatever systems needs to run them
  8. Deploy
    • Place check_whois in the same location where your distro's package manager has place other Nagios plugins
      • as /usr/lib/nagios/plugins/check_whois on Debian-based systems
      • as /usr/lib64/nagios/plugins/check_whois on RedHat-based systems

NOTE: Depending on which Makefile recipe you use the generated binary may be compressed and have an xz extension. If so, you should decompress the binary first before deploying it (e.g., xz -d check_whois-linux-amd64.xz).

Using release binaries

  1. Download the latest release binaries
  2. Decompress binaries
    • e.g., xz -d check_whois-linux-amd64.xz
  3. Deploy
    • Place check_whois in the same location where your distro's package manager places other Nagios plugins
      • as /usr/lib/nagios/plugins/check_whois on Debian-based systems
      • as /usr/lib64/nagios/plugins/check_whois on RedHat-based systems

NOTE:

DEB and RPM packages are provided as an alternative to manually deploying binaries.

Configuration

Command-line arguments

check_whois

Flag Required Default Repeat Possible Description
branding No false No branding Toggles emission of branding details with plugin status details. This output is disabled by default.
h, help No false No h, help Show Help text along with the list of supported flags.
v, version No false No v, version Whether to display application version and then immediately exit application.
c, age-critical No 15 No positive whole number of days The number of days remaining before domain expiration when a CRITICAL state is triggered.
w, age-warning No 30 No positive whole number of days The number of days remaining before domain expiration when a WARNING state is triggered.
ll, log-level No info No disabled, panic, fatal, error, warn, info, debug, trace Log message priority filter. Log messages with a lower level are ignored.
d, domain Yes No domain name The name of the domain whose WHOIS records will be evaluated.
s, server No No valid WHOIS server fqdn The name of the optional domain registrar WHOIS server to use for queries.
disable-ref-lookups No false No true, false Disables WHOIS server referral lookups. Lookups are enabled by default.

Examples

OK result

This example uses default age thresholds to check the expiration date for the specified domain. Since the expiration occurs after those default thresholds, the result is considered OK.

$ ./check_whois --domain "google.com"
OK: "google.com" domain registration has 2602d 18h remaining

**ERRORS**

* None

**THRESHOLDS**

* CRITICAL: Expires before 2021-08-14 09:31:39 +0000 UTC (15 days)
* WARNING: Expires before 2021-08-29 09:31:39 +0000 UTC (30 days)

**DETAILED INFO**

WHOIS metadata for "google.com" domain:

* Status: [clientdeleteprohibited, clienttransferprohibited, clientupdateprohibited, serverdeleteprohibited, servertransferprohibited, serverupdateprohibited]
* Creation Date: 2028-09-14 04:00:00 +0000 UTC
* Updated Date: 2019-09-09 15:39:04 +0000 UTC
* Expiration Date: 2028-09-14 04:00:00 +0000 UTC
* Registrar Name: MarkMonitor Inc.
* Registrant Name:
* Registrant Email: select request email form at https://domains.markmonitor.com/whois/google.com

WARNING result

This example uses explicit age thresholds to simulate a domain that is expiring soon, but hasn't yet crossed the final CRITICAL age threshold. The result is considered to be a WARNING state.

$ ./check_whois --domain "microsoft.com" --age-warning 365 --age-critical 120
{"level":"warn","version":"check-whois x.y.z (https://github.com/atc0005/check-whois)","logging_level":"info","domain":"microsoft.com","time":"2021-07-30T04:40:08-05:00","caller":"/mnt/t/github/check-whois/cmd/check_whois/main.go:142","message":"Domain is expiring"}
WARNING: "microsoft.com" domain registration has 276d 18h remaining

**ERRORS**

* domain is expiring

**THRESHOLDS**

* CRITICAL: Expires before 2021-11-27 09:40:08 +0000 UTC (120 days)
* WARNING: Expires before 2022-07-30 09:40:08 +0000 UTC (365 days)

**DETAILED INFO**

WHOIS metadata for "microsoft.com" domain:

* Status: [clientdeleteprohibited, clienttransferprohibited, clientupdateprohibited, serverdeleteprohibited, servertransferprohibited, serverupdateprohibited]
* Creation Date: 2022-05-03 04:00:00 +0000 UTC
* Updated Date: 2021-03-12 23:25:32 +0000 UTC
* Expiration Date: 2022-05-03 04:00:00 +0000 UTC
* Registrar Name: MarkMonitor Inc.
* Registrant Name: Domain Administrator
* Registrant Email: admin@domains.microsoft

CRITICAL result

This example uses explicit age thresholds to simulate a domain that is expiring soon and has crossed the final CRITICAL age threshold. The result is considered to be a CRITICAL state.

The domain is expected to expire soon without direct intervention from the current domain owner.

$ ./check_whois --domain "godaddy.com" --age-warning 365 --age-critical 120
{"level":"warn","version":"check-whois x.y.z (https://github.com/atc0005/check-whois)","logging_level":"info","domain":"godaddy.com","time":"2021-07-30T04:41:06-05:00","caller":"/mnt/t/github/check-whois/cmd/check_whois/main.go:142","message":"Domain is expiring"}
CRITICAL: "godaddy.com" domain registration has 94d 2h remaining

**ERRORS**

* domain is expiring

**THRESHOLDS**

* CRITICAL: Expires before 2021-11-27 09:41:06 +0000 UTC (120 days)
* WARNING: Expires before 2022-07-30 09:41:06 +0000 UTC (365 days)

**DETAILED INFO**

WHOIS metadata for "godaddy.com" domain:

* Status: [clientdeleteprohibited, clientrenewprohibited, clienttransferprohibited, clientupdateprohibited, serverdeleteprohibited, servertransferprohibited, serverupdateprohibited]
* Creation Date: 2021-11-01 11:59:59 +0000 UTC
* Updated Date: 2020-04-07 14:26:27 +0000 UTC
* Expiration Date: 2021-11-01 11:59:59 +0000 UTC
* Registrar Name: GoDaddy.com, LLC
* Registrant Name:
* Registrant Email: select contact domain holder link at https://www.godaddy.com/whois/results.aspx?domain=godaddy.com

License

MIT License

Copyright 2021 Adam Chalkley

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.

References

Related projects

Dependencies

General