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A simple metric collector with alerts.

Project description

A simple monitoring system built on top of Django.

The intent is to serve both as an alerting system like monit and a monitoring system like munin (using Graphite’s whisper database).

The original release of Salmon was coupled to Salt and designed to monitor servers (Sal t Mon itor). As of v0.2.0, the system has been decoupled from Salt and ingests data via a simple HTTP interface.


To bootstrap the project:

virtualenv salmon
source salmon/bin/activate
pip install salmon
salmon init
salmon upgrade
salmon collectstatic

Fire up the web server with:

salmon start

Sending Metrics to Salmon

Metrics are sent in as JSON over HTTP. The format for a single metric:

    "source": "",
    "name": "load",
    "value": 0.1

Multiple metrics can be sent as an array:

    {"source": "", "name": "load", "value": 0.1},
    {"source": "", "name": "cpu", "value": 55.5}

The API endpoint is /api/v1/metric/. If your Salmon server lives at, you can POST to Pass in your API key as found in ~/.salmon/ for authentication. Using Curl, it would look something like this:

curl -i --user "<API_KEY>:" \
     -H "Content-Type: application/json" \
     -X POST \
     -d '{"source": "", "name": "load", "value": 0.1}' \

Using Salt

  1. Setup the salt-stats states on your master or just grab the salmon returner

  2. Add the path to your Salmon install and API key (found in ~/.salmon/ to your Salt Pillar. (salmon pillar example)

  3. Add a schedule pillar. (schedule pillar example)

  4. Run salt '*' saltutil.sync_all

Note: To use Salt’s ps module, psutil must be installed on the minions. Ubuntu provides a python-psutil package or it can be installed via pip install psutil.

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