Docker Health Monitoring System

Fri, 11 Jun 2021 19:02:46 +0000

The purpose of this project is to develop a system to monitor the health of a set of Docker hosts. On each Docker host runs an agent, a software whose task is to periodically check the wellbeing of containers running on the same host. Specifically, every x seconds the agent pings all containers in the ”to be monitored” list and calculates the experienced packet loss. If a container is down or if it is experiencing packet loss greater than a certain threshold, the agent must destroy it and automatically restart it.

The list of containers to be monitored and the threshold are set by the system administrator, who communicates with the system via a REST interface. This interface is exposed by a control module running on one of the Docker hosts (in our case, on the machine with IP address 172.16.3.169).

In addition, one of the Docker hosts (in our case, the machine with IP address 172.16.3.172) exposes the RabbitMQ broker service as a container, thus allowing the various components (the agents and the swagger server to communicate.

To test the proper functioning of the system we have:

created ”dummy” containers running on each Docker host that will be monitored by each of the agents
developed the antagonist, a small program running on each Docker host that periodically stops containers or artificially causes packet losses

RabbitMQ | Federica Baldi

Docker Health Monitoring System