Uvod

• Docker je platforma za development, delivery i izvršavanje aplikacija
• Docker omogućava da se aplikacija izolira u repetativnoj okolini i odvoji od infrastrukture

Features of Docker:

• Open-source platform
• An Easy, lightweight, and consistent way of delivery of applications
• Fast and efficient development life cycle
• Segregation of duties
• Service-oriented architecture
• Security
• Scalability
• Reduction in size
• Image management
• Networking
• Volume management

Struktura

• Dockerfile
• image
• container registry
  • lokalni
  • dockerhub
  • AWS ECR
• container

Dockerfile

• base image
  • odabir najmanjeg funkcionalnog
  • debian prije ubuntua
  • debian-slim prije debiana
  • alpine
  • from scratch
• env varijable

Docker image

• single stage build
• multistage build

Docker container

run, publish port 3000:

docker run --name api-server-3000 --publish 3000:3000 --env CONTAINER_NAME="Awesome API server on port 3000" -d api-server

run, publish port 3001:

docker run --name api-server-3001 --publish 3001:3000 --env CONTAINER_NAME="Awesome API server on port 3001" -d api-server

run, publish port 3002:

docker run --name api-server-3002 --publish 3002:3000 --env CONTAINER_NAME="Awesome API server on port 3002" -d api-server

Media

Docker vs VM

Docker elements

Dockerfile layers

Port publishing

Horizontal scaling

Volumes