Sonar is a data center monitoring solution that is designed to gather vast amounts of server metrics an log data. All data is stored in HBase by one or multiple data collection daemons.

• Sensors: A number of small programs dedicated to measure metrics on a system. For example, there are two programs that measure the CPU and memory load. A sensor gathers metric readings in an interval and prints the reading on its stndard output stream.
• SensorHub: Runs on each monitored node. It starts and controls sensor program instances and reads their metric readings on the standard output stream. All data is aggregated and forwarded to a Collector service.
• Collector: A horizontal scalable service that receives monitoring data from SensorHubs. All data is stored in an HBase database. In addition, the Collector manages all meta data about the infrastructure.
• WebUI: A web user interface to configure which sensor programs should be running on a particular node. In addition it provies interfaces for querying and browsing recorded log-message or metric readings.

The architecture is similar to the one of OpenTSDB but differs at some points:

• Apache Thrift is used for all telemetry and storage
• Supports log messages
• Sensor programs are distributed and installed by Sonar automatically
• Dynamic (re-)configuration of sensors from a central location
• Supports dynamic environments like virtualized data centers

Sonar needs access to an HBase cluster and a Redis key-value store.

Each monitored node (Linux) runs the SensorHub daemon with the following dependencies:

• Python 2.7 (with development packages)
• Python Easy Install
• Apache Thrift for Python
• PyYaml
• Psutil 0.5.1

Further libraries might be required, depending on the snsor programs used.

The collector is based on Java. The project contains all required JAR libraries.

Based on NodeJS. The project contains all required libraries.