Riemann-to-Alerta

Forward Riemann events to Alerta for a consolidated view and improved visualisation.

Transform this ...

Into this ...

Installation

To install Riemann on Debian/Ubuntu...

$ export VERSION=0.3.1
$ sudo apt-get install openjdk-7-jre
$ wget -nv https://github.com/riemann/riemann/releases/download/${VERSION}/riemann_${VERSION}_all.deb
$ sudo dpkg -i riemann_${VERSION}_all.deb

Replace the default riemann.config file with the example...

$ sudo mv /etc/riemann/riemann.config{,.bak}
$ wget https://raw.github.com/alerta/riemann-alerta/master/riemann.config
$ sudo cp riemann.config /etc/riemann/

Add the alerta clojure library...

$ wget https://raw.github.com/alerta/riemann-alerta/master/alerta.clj
$ sudo cp alerta.clj /etc/riemann/

Configuration

Include and require the Alerta plugin:

(include "alerta.clj")
(:require '[alerta :refer [alert heartbeat]])

Set the alert and heartbeat endpoints depending on where the alerta API is located:

; Alerta configuration
(def alert (alerta/alert {:endpoint "https://alerta-api.herokuapp.com" :api-key "demo-key"}))
(def heartbeat (alerta/heartbeat {:endpoint "https://alerta-api.herokuapp.com" :api-key "demo-key"}))

Start Riemann...

$ sudo service riemann start

Testing

Generate some test alerts by generating metrics using riemann-health...

$ sudo apt-get install ruby1.9.1 ruby1.9.1-dev
$ sudo gem install riemann-tools
$ riemann-health

Troubleshooting

To generate debug output from the HTTP client add debug and/or debug-body to the Alerta configuration definitions as shown:

; Alerta configuration
(def alert (alerta/alert {:endpoint "https://alerta-api.herokuapp.com" :debug true :debug-body true}))
(def heartbeat (alerta/heartbeat {:endpoint "https://alerta-api.herokuapp.com" :debug true :debug-body true}))

Example Debug output

HttpRequest:
{:config nil,
 :method "POST",
 :requestLine
 #object[org.apache.http.message.BasicRequestLine 0x1eb6380d "POST https://alerta-api.herokuapp.com/alert HTTP/1.1"],
 :aborted false,
 :params
 #object[org.apache.http.params.BasicHttpParams 0x4678323f "org.apache.http.params.BasicHttpParams@4678323f"],
 :protocolVersion
 #object[org.apache.http.HttpVersion 0x389a53e1 "HTTP/1.1"],
 :URI
 #object[java.net.URI 0xede089 "https://alerta-api.herokuapp.com/alert"],
 :class org.apache.http.client.methods.HttpPost,
 :allHeaders
 [#object[org.apache.http.message.BasicHeader 0x42265e51 "Connection: close"],
  #object[org.apache.http.message.BasicHeader 0x11b5e77c "Authorization: Key demo-key"],
  #object[org.apache.http.message.BasicHeader 0x574090ad "content-type: application/json"],
  #object[org.apache.http.message.BasicHeader 0x34bc7ac8 "accept: application/json"],
  #object[org.apache.http.message.BasicHeader 0x675e94f2 "accept-encoding: gzip, deflate"]],
 :entity
 #object[org.apache.http.entity.StringEntity 0x59ee0162 "[Content-Type: text/plain; charset=UTF-8,Content-Length: 471,Chunked: false]"]}

References

• clj-http - https://github.com/dakrone/clj-http

License

Copyright (c) 2013,2018 Nick Satterly. Available under the MIT License.