firestealer 0.4.1

Installation

Run pip install firestealer. This will make the fsteal command available.

Usage

Print JSON formatted samples from a Prometehus endpoint:

$ fsteal http://localhost:8000/metrics

Filter metrics using a regular expression against the sample name:

$ fsteal http://localhost:8000/metrics -m '^myservice(Downloads|Uploads)'

Store samples into InfluxDB:

$ fsteal localhost:8000/metrics influxdb://user:passwd@10.0.0.1:8086/mydb

Store a subset of samples into InfluxDB:

$ fsteal localhost:8000/metrics influxdb://user:passwd@10.0.0.1:8086/mydb -m '^myservice'

In the example above the InfluxDB connection info is provided using a influxdb://$user:$passwd@$host:$port/$database connection string.

Only print specific metrics values (useful when executing fsteal in order to retrieve charm metrics):

$ fsteal localhost:8000/metrics a-single-specific-key --format values-only

API

An API is exposed so that firestealer can be used as a library from Python applications. For instance, a charm could propagate metrics from Prometheus to Juju with the following snippet placed in the collect-metrics hook:

from firestealer import (
    add_metrics,
    retrieve_metrics,
)

url = 'https://localhost:8000/metrics'
with open('metrics.yaml') as f:
    metrics = yaml.safe_load(f)
samples = retrieve_metrics(url, metrics, noverify=True)
add_metrics(samples)