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docker-skynet

A stack used to automatically register Docker container hosting webapps as services in Consul, distribute them using HAProxy and monitor it with Prometheus.

About

Powered by the following tools:

  • Docker: a portable, lightweight runtime and packaging tool.

See: https://www.docker.com/

  • Docker-compose: a tool used to manage an application in distributed containers.

See: https://docs.docker.com/compose/

  • HAProxy: a TCP/HTTP load balancer.

See: http://www.haproxy.org/

  • Consul: a tool for discovering and configuring services in your infrastructure.

See: https://www.consul.io/

  • Consul-template: a daemon used to populate values from Consul on your filesystem.

See: https://github.com/hashicorp/consul-template

  • Registrator: a tool that automatically register/deregister Docker containers into Consul.

See: https://github.com/gliderlabs/registrator

  • Prometheus: An open-source service monitoring system and time series database.

See: http://prometheus.io/

poc_hld

How to

Pre-requisites

Ensure you have Docker and Docker Compose installed:

Then, update the docker-compose.yml file and replace ROUTABLE_IP with a routable IP address (use your main interface IP address).

Let's play

Start it

Start the stack:

$ docker-compose pull & docker-compose build
$ docker-compose up -d

Start a webapp

You'll need to have a containerized webapp available.

A backend webapp is shipped with the stack, you'll need to build it first:

$ docker build -t skynet-backend backend/

Then run it:

$ docker run -d -P \
    -e "SERVICE_NAME=skynet_backend" \
    -e "SERVICE_8081_IGNORE=1" \
    -e "SERVICE_8080_CHECK_CMD=/tmp/health-check.sh" \
    -e "SERVICE_8080_CHECK_INTERVAL=15s" \
    skynet-backend \
    java -jar /tmp/backend.jar

Point your browser at http://localhost to see the result.

Consul

You can place different configuration files in consul/config, they will be loaded by Consul.

You can place your watch handlers inside consul/handlers, it will be mapped on the container in /handlers.

You can access the Consul UI via http://localhost:8500

Prometheus

Access the Prometheus UI via http://localhost:9090