Sensucronic

sensucronic is a wrapper for your cron jobs to integrate with the sensu client input socket.

it's written in ruby using mixlib::cli to fit in with the rest of the sensu ecosystem

Installation

Add this line to your application's Gemfile:

gem 'sensucronic'

And then execute:

$ bundle

Or install it yourself as:

$ gem install sensucronic

Usage

sensucronic [ OPTIONS ] [ -- ] COMMAND [ ARGS ]

sensucronic [ OPTIONS ] [ -- ] 'COMMAND [ ARGS ]'

sensucronic runs COMMAND with ARGS it generates a json report and submits it to the sensu-client input socket

use --help to view options

prompt% sensucronic --help 
s@otfess-3-1645% bundle exec exe/sensucronic --help 
Usage: sensucronic (options)
    -d, --dry-run                    output result to stdout only
    -f, --field "key: value"         add a field to the json report
    -h, --help                       print this message
    -p, --port PORT                  the port number for the sensu client input socket
    -s, --source SOURCE              set the source attribute on the sensu result

the OPTION --dryrun causes sensucronic to issue it's report to stdout instead of the sensu client input socket.

prompt% sensucronic --dry-run true     
{
  "command": "true",
  "output": "",
  "status": 0,
  "exitcode": 0,
  "agent": "sensucronic"
}

exitcodes are propogated to sensu's status field, 0 ok, 1 warn, 2 crit, 3 unknown but anything > 3 sets status to 3.

TODO: add options to configure this.

prompt% sensucronic --dry-run 'echo hi; exit 20'
{
  "command": "echo\\ hi\\;\\ exit\\ 20",
  "output": "hi\n",
  "status": 3,
  "exitcode": 20,
  "agent": "sensucronic"
}

given a single quoted argument it will be parsed with a shell otherwise it tries to exec it as command followed by arguments

prompt% sensucronic --dry-run  exit 3
{
  "command": "exit 3",
  "output": "Errno::ENOENT\nNo such file or directory - exit",
  "status": 3,
  "exitcode": 127,
  "agent": "sensucronic"
}

prompt% sensucronic --dry-run  'exit 3'
{
  "command": "exit\\ 3",
  "output": "",
  "status": 3,
  "exitcode": 3,
  "agent": "sensucronic"
}

the option --field allows you to add arbitrary attributes to the json report. you can repeat it as often as you need. note that you can't override the built in fields.

prompt% sensucronic --field 'team: blah' --field foo:bar --field output:blah --dry-run 'echo hi; exit 20'
{
  "command": "echo\\ hi\\;\\ exit\\ 20",
  "output": "hi\n",
  "status": 3,
  "exitcode": 20,
  "agent": "sensucronic",
  "team": "blah",
  "foo": "bar"
}

TODO

• accept options to configure the status in response to the exitcodes. (always warn, always crit )
• allow specifying alternate host, currently the sensu agent must be running on the local box.
• maybe submit via http to client http api on another host

Development

After checking out the repo, run bin/setup to install dependencies. Then, run rake spec to run the tests. You can also run bin/console for an interactive prompt that will allow you to experiment.

To install this gem onto your local machine, run bundle exec rake install. To release a new version, update the version number in version.rb, and then run bundle exec rake release, which will create a git tag for the version, push git commits and tags, and push the .gem file to rubygems.org.

Contributing

Bug reports and pull requests are welcome on GitHub at https://github.com/opentable/sensucronic

License

The gem is available as open source under the terms of the MIT License.