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Nagios plugin to check SL delays for a given site

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check_sl_delay is a simple Nagios plugins to check the percentage of late departures for any given site operated by SL (Stockholms Länstrafik).


The easiest way to install check_sl_delay is via pip. Make sure to run this with python3, in some environments pip should be replaced with pip3 or similar.

For a specific user:

$ pip install --user check-sl-delay

This will put the executable check_sl_delay in ~/.local/bin/, so make sure that this is part of your $PATH variable.

System wide:

# pip install check-sl-delay

This will put the executable check_sl_delay in /usr/local/bin/, which is usually already part of the system wide $PATH. Check the documentation of your specific OS.

Wherever your executable file has been placed, you may symlink it to a place where plugins are generally available in your environment, for example /opt/plugins/:

# ln -s /usr/local/bin/check_sl_delay /opt/plugins/check_sl_delay


Once you have made sure that check_sl_delay is on your $PATH, you can find some useful information with the --help option:

$ check_sl_delay --help
Usage: check_sl_delay [OPTIONS]

  check_sl_delay will connect to the SL API to determine the percentage of
  delayed departures for any given site-id.

  The site-id and the needed API key can be found using the API SL

  The departure-api-key can be found using the API SL Realtidsinformation 4:

  Example: check_sl_delay -a <site-api-key> -A <departure-api-key> -p 10
  -m 1 -i 1002 -T METRO -w 20 -c 30

  The above example will check the site 1002 (T-Centralen) for all METRO
  departures in the coming 10 minutes. It will warn if the percentage of
  departures that are more than 1 minute late is 20% or more of the total
  amount of departures for the time period. It will crit if the same
  percentage is 30% or more.

  -a, --site-api-key TEXT         API key for 'SL Platsuppslag' (see

  -A, --departure-api-key TEXT    API key for 'SL Realtidsinformation 4' (see

  -w, --warning INTEGER RANGE     Warning threshold (0-100), warning if the
                                  percentage of departures having delays above
                                  --minutes is greater or equal than this
                                  option. Must be less than --critical.

  -c, --critical INTEGER RANGE    Critical threshold (0-100), critical if the
                                  percentage of departures having delays above
                                  --minutes is greater or equal than this
                                  option. Must be greater than --warning.

  -i, --site-id INTEGER RANGE     Site-id to check.  [required]
  -m, --minutes INTEGER RANGE     Delay threshold, in minutes.  [required]
  -p, --period INTEGER            Time period to check, in minutes.

  -t, --timeout INTEGER RANGE     Plugin timeout, in seconds.
  -T, --traffic-type [BUS|METRO|TRAIN]
                                  Traffic type to check.  [required]
  -v, --verbose                   Use 2 times for higher verbosity.
  --version                       Show the version and exit.
  -h, --help                      Show this message and exit.

Known Limitations

Due to a limitation in click the locale must be unicode and not ascii. For more information see this page.


0.1.3 (2020-03-27)

  • Added options for API key and removed personal key from dev files.

0.1.2 (2020-03-24)

  • Minor fixes.

0.1.1 (2020-03-23)

  • Added short help option (-h).

0.1.0 (2020-03-23)

  • First stable release on PyPI.

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