Juttle Graphite Adapter

Graphite adapter for the Juttle data flow language, with read & write support.

Examples

Reading existing metrics is as simple as:

read graphite -from :1 week ago: name ~ 'app1.*.response_ms'
| reduce value = avg(value) by name

This will compute last week's average of every metric matching app1.*.response_ms.

If you encoded something like the region or hostname into the metric name then you can easily parse that name in juttle. Let's say your metric name looks like region.host.metric_name. Then you can calculate the average value of the response time per host every 1 minute for the last 24 hours like so:

read graphite -from :24 hours ago: name ~ '*.response_ms'
| put host = String.split(name, '.')[1]
| reduce -every :1 minute: value = avg(value) by host

Installation

Like Juttle itself, the adapter is installed as a npm package. Both Juttle and the adapter need to be installed side-by-side:

$ npm install juttle
$ npm install juttle-graphite-adapter

Configuration

The adapter needs to be registered and configured so that it can be used from within Juttle. To do so, add the following to your ~/.juttle/config.json file:

{
    "adapters": {
        "graphite": {
            "carbon": {
                "host": "localhost",
                "port": 2003
            },
            "webapp": {
                "host": "localhost",
                "port": 8080,
                "username": "...",
                "password": "..."
            }
        }
    }
}

Keys in carbon specify the location of Graphite storage backend, keys in webapp contain configuration for the Graphite frontend.

Usage

Data Model

Graphite stores metrics with:

• name - alphanumeric sequence defining a path to your metric that you should consider naming appropriately. See graphite documentation for more details.

• value - numerical value for the metric identified

• timestamp - the timestamp associated with this metric as an integer of seconds since epoch.

Read options

When reading data out of graphite every metric will be converted into a point with the name, value, and time fields.

Name	Type	Required	Description
from	moment	no	select points after this time (inclusive)
to	moment	no	select points before this time (exclusive)

Write options

This adapter maps data points containing the fields name, value, and time to a graphite metric. All other points missing these fields are not written and a warning is issued instead.

So, for writing, the key thing is to make sure your data contains the fields name, value and time. When constructing data from a data point that has multiple fields, make sure to pick a naming convention you can easily use to parse back out of graphite later. More details on naming your metric can be found in the graphite wiki.

Contributing

Want to contribute? Awesome! Don’t hesitate to file an issue or open a pull request.