Prometheus-Rancher Service Discovery Bridge
Forked from https://github.com/DanielDent/prom-rancher-sd - all credit to Daniel Dent
This utility was created to integrate prometheus monitoring to application & node_exporter running in Docker containers.
prom-rancher-sd polls Rancher's metadata service and looks for containers with the com.prometheus.monitoring label set to true or part of the service node-exporter.
A configuration file suitable for use by Prometheus is written to enable services to be monitored automatically.
The configuration file will be written to the directory /prom-rancher-sd-data by default, use the OUTPUT_FOLDER environment variable to change the directory.
I changed a bit the cowhand approach by enriching the labels and assigning some sensible defaults.
One application running in container will be published in Prom configuration if it has the com.prometheus.monitoring label set to true.
Prometheus will scrape /metrics (default value) or the value specified by com.prometheus.metricspath label via HTTP by connecting to the container's primary IP on the 8083 port (default) or on the port specified by the com.prometheus.port label.
The Let it Crash design used implies that this software should be operated under a process supervisor. Docker and Rancher's automatic container restart facilities are believed adequate.
License
Copyright 2016 Daniel Dent.
Licensed under the Apache License, Version 2.0 (the "License"); you may not use these files except in compliance with the License. You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.
Third-party contents included in builds of the image are licensed separately.