Question 1

How do I install Docker Compose on Ubuntu?

Accepted Answer

Download the binary from the GitHub release page, rename it to docker-compose, and place it in a CLI plugins directory like /usr/local/lib/docker/cli-plugins. Make it executable with chmod +x for system-wide use.

Question 2

Docker Compose vs Kubernetes: which one should I use?

Accepted Answer

Use Docker Compose for local development and testing of multi-container apps due to its simplicity. For production deployments with scaling, resilience, and cloud integration, Kubernetes is the better choice.

Question 3

How can I use environment variables in my Docker Compose file?

Accepted Answer

Define environment variables directly in the Compose file using the 'environment' key or reference external .env files. This allows for flexible configuration across different deployment stages.

Question 4

Is Docker Compose good for production use?

Accepted Answer

Docker Compose is primarily designed for development and testing, not production. It lacks features for high availability and dynamic scaling, so consider orchestration platforms like Kubernetes for production workloads.

Question 5

What's the difference between Docker Compose and Docker Swarm?

Accepted Answer

Docker Compose is for defining and running multi-container apps locally, while Docker Swarm is a clustering tool for production orchestration. However, as noted in the README, Swarm doesn't fully support recent Compose enhancements.

Question 6

How do I scale a service in Docker Compose?

Accepted Answer

You can use the '--scale' flag with docker compose up for basic scaling, but it's limited to static instances and not designed for dynamic scaling. For advanced needs, migrate to Kubernetes or similar tools.

Docker Compose

What is Docker Compose?

Overview

Use Cases

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Related Projects

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Pros & Cons

Pros

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Frequently Asked Questions