Seamlessly Managing a Fleet of Raspberry Pis with Docker
Managing a fleet of Raspberry Pis, especially when running applications in Docker containers, requires a streamlined process for deployment and updates. This tutorial will guide you through setting up a local Docker registry on a master PC and automating container updates on each Raspberry Pi. This setup ensures your fleet is always running the latest versions of your applications with minimal manual intervention.
Setting Up a Local Docker Registry
The first step involves setting up a local Docker registry on your master PC. This registry will store Docker images locally, allowing your Raspberry Pis to pull updates efficiently without relying on external internet connections. Here’s how to do it:
Docker Compose File for Local Registry and UI
version: '2.0'
services:
my-registry:
image: registry:2.6.2
volumes:
- ./my-registry-data:/var/lib/registry
networks:
- my-registry-net
my-ui:
image: joxit/docker-registry-ui:static
ports:
- 8090:80
environment:
- REGISTRY_TITLE=Our Custom Docker Hub
- REGISTRY_URL=http://my-registry:5000
depends_on:
- my-registry
networks:
- my-registry-net
networks:
my-registry-net:
- Registry: This service runs the Docker…