logstash-output-slack: A Ruby repository from spang

Reviews of the code/contributions are very welcome (particularly with testing!), since I don't really know Ruby.

Logstash Slack Output Plugin

Uses Slack incoming webhooks API to send log events to Slack.

Usage:

input {
    ...
}

filters {
    ...
}

output {
    ...
    slack {
        url => <YOUR SLACK WEBHOOK URL HERE>
        channel => [channel-name - this is optional]
        username => [slack username - this is optional]
        icon_emoji => [emoji, something like ":simple_smile:" - optional]
        icon_url => [icon url, would be overriden by icon_emoji - optional]
        format => [default is "%{message}", but used to format the text - optional]
    }
}

Not supported yet: attachments

Installation on Logstash >= 1.5

In the logstash directory, run: bin/plugin install logstash-output-slack

To build your own gem and install:

git clone <thisrepo>
bundle install
gem build logstash-output-slack.gemspec

You should just be able to do bin/plugin install <path-to-your-built-gem>, but due to this bug installing from a local gem doesn't work right now.

You need to:

Make sure that the logstash-core gem you've installed matches the exact beta 1.5 logstash version you are running.
modify the logstash Gemfile to include the line gem "logstash-output-slack", :path => <path_to_the_directory_your_gem_is_in>
bin/plugin install --no-verify

Verify that the plugin installed correctly

bin/plugin list | grep logstash-output-slack

Test that it works:

bin/logstash -e '
input { stdin {} }
output { slack { <your slack config here> }}'

And type some text in. The same text should appear in the channel it's configured to go in.

Installation on Logstash < 1.4

Gem-installing this plugin would only work on Logstash 1.5. For Logstash < 1.5, you could just rename lib in this repo to logstash, and then run Logstash with `--pluginpath <path_to_this_repo>.