Data Service Starter Project

This is a skeleton project that pre-configures a shared data services project to act as the storage / front-end for micro services. It is intended to be used in conjunction with the Symfony Micro Service and provides the DNS, proxy, rabbit queue and database(s).

It includes:

• commented docker-compose.yml file
• docker configuration including Postgres, dns, Traefik, and RabbitMQ
• docker is configured to use Docker volumes

Assorted readme files are included for different parts of the service setup:

• Service Discovery
• Setting up SSL

Getting Started

From GitHub, create a new repository from the data-service-skeleton template and then check it out to your dev machine. Alternatively checkout a detached copy from GitHub and then push to a new repo later.

Customise the base files as you see fit; change names, (especially the service names), config values etc to suite your needs. Then: docker-compose up -d to start the docker environment in dev mode. Be sure to read Service Discovery to understand some of how the docker environment is setup.

Recommended First Steps

This project uses example.dev and placeholders though out. Your first step should be to set the project names, and dev domain that you will use.

The domain name is set in several places, it is strongly recommended to change this to something more useful. The following files should be updated:

• .env
• docker-compose*.yml
• config/docker/proxy/traefik.yaml
• config/docker/proxy/certs/req.cnf
• config/docker/dns/Dockerfile

Configured Services

The following docker services are pre-configured for development:

• PostgreSQL 12
• RabbitMQ 3.7 + management console
• DNSmasq
• syslog-ng 3
• Traefik 2.2

Docker Service Names

The Docker container names will be prefixed by a project name defined in the .env file. This is the constant COMPOSE_PROJECT_NAME. If you remove it, the current folder name will be used instead. For example: you create a new project called "db-service", without setting the COMPOSE constant the containers started via docker-compose will be prefixed with db-service_. If you have a lot of docker projects, they may have similar folder names, so using this constant avoids collisions.

DNS Resolution

DNSmasq is included to provide local DNS resolution to avoid needing entries in your /etc/hosts file. Be sure to check out the instructions in Service Discovery.

If you use a remote docker host, then the scripts will check for the following shell constants:

• DNS_HOST_IP
• DOCKER_HOST
• DOCKER_HOST_ALT

DNS_HOST_IP is the IP address of the host running DNSmasq i.e. the docker host IP address. DOCKER_HOST is the host name of the docker host, and must be fully qualified. For example: DOCKER_HOST="tcp://my-docker-host.example.dev:2375". This is presuming you have a trusted docker host that is not secured. If you do not have DNS translation, then DOCKER_HOST_ALT can be used with the IP address of the docker host: DOCKER_HOST_ALT="tcp://192.168.1.2:2375" The _HOST_ constants are used in docker-compose.yml on the proxy service.

Contributing

Contributions are welcome! Spot an error, want additional docs or something better explaining? Then create a ticket on the project, or open a PR.