Key Points

1. Docker is the most common container solution
2. Docker has open-sourced basic Docker container and Docker-Compose to run multiple Docker containers 
3. Docker Enterprise provides more management features at a price and competes against Kubernetes and other orchestration frameworks
4. Linux Foundation has Kubernetes, a platform-independent orchestration manager, to manage and run containers on any platform using an open source container based on Docker 
5. the right build pipelines can build container images for multiple platforms

References

Critical decisions for Docker

Key Concepts

What can run in a Docker container?

anything the OS and the container support

applications, services, utilities, libraries, other binaries, database servers, etc

Docker create process

create container folder

add app files

add container configuration

create image file

sign image file

push to repo

update the Docker registry

Docker deploy process

install Docker runtime on the OS

lookup the container in the Docker registry

pull Docker image from OS

if needed, manage the environment config

Docker advantages

1. containers adapt to host environments, apps don't have to
2. apps see environment abstracted as a common model regardless of deployment
3. containers can add a layer of security
4. can be used to transform monolith to microservices with minimal environment changes
5. works well in devops pipelines lowering maintenance costs for faster CICD
6. makes apps easy to distribute and configure for different environments

Docker components

• Docker images
  
  • the files that make up a container
• Docker containers
  • contain 1 or more applications or services in the Docker container environment
• Docker engines runs containers. Networking and volume resources are managed by engines
  • executes the runtime enviornment for the contained applications
• Docker registry stores, distributes and manages Docker images
• Docker control plane for container, cluster orchestration

Docker engine features

security

network support

volumes

runtime

distributed state

orchestration

Docker EE adds:

security

orchestration

management

support

plugins

Potential Value Opportunities

Potential Challenges

Questions

1. Can a Docker engine run a different OS than the host OS?

Candidate Solutions

Step-by-step guide for Example

sample code block

Recommended Next Steps

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