Introduction

On Amazon Linux 2, the reliable modern answer is to install Docker first and then install the Docker Compose plugin, which is used through docker compose. The size of your Compose file, whether it is 9 KB or much larger, is usually not the problem; installation, plugin path, and command choice are the parts that actually matter.

Install Docker on Amazon Linux 2

If Docker is not installed yet, Amazon Linux 2 commonly uses the docker extras package:

1sudo yum update -y
2sudo amazon-linux-extras install docker -y
3sudo service docker start
4sudo usermod -aG docker ec2-user

After adding your user to the docker group, open a new shell session or reconnect so the group change takes effect.

Check that Docker is working:

docker --version
docker run hello-world

If docker run hello-world fails, fix Docker itself before spending time on Compose.

Prefer the Compose Plugin Over the Legacy Standalone Binary

Current Docker documentation treats the Compose plugin as the standard Linux installation path. That means the command you should expect to use is:

docker compose version

not:

docker-compose --version

The standalone docker-compose binary still exists for legacy compatibility, but it is no longer the recommended default. If old scripts depend on that exact command name, keep that requirement explicit instead of assuming every modern Docker setup provides it.

Install the Compose Plugin Manually

On Amazon Linux 2, one practical way to install the plugin is to place the binary in Docker’s CLI plugin directory.

1DOCKER_CONFIG=${DOCKER_CONFIG:-$HOME/.docker}
2mkdir -p "$DOCKER_CONFIG/cli-plugins"
3curl -SL "https://github.com/docker/compose/releases/download/v2.40.1/docker-compose-linux-x86_64" \
4  -o "$DOCKER_CONFIG/cli-plugins/docker-compose"
5chmod +x "$DOCKER_CONFIG/cli-plugins/docker-compose"

Then verify it:

docker compose version

If your instance uses a different architecture, download the matching binary for that architecture instead of x86_64.

For a system-wide install, place the plugin under /usr/local/lib/docker/cli-plugins and apply executable permissions there.

Test with a Small Compose File

Once the plugin is installed, test it with a known-good file. A minimal example is enough:

1services:
2  web:
3    image: nginx:alpine
4    ports:
5      - "8080:80"

Save that as compose.yaml or docker-compose.yml, then run:

docker compose up -d
docker compose ps
docker compose logs

If that works, the Compose installation is fine and any remaining problem is probably inside the project’s own configuration rather than in the plugin setup.

Why File Size Is Usually Not the Issue

A 9 KB Compose file is not unusual. Docker Compose routinely handles files much larger than that. When a deployment fails, the more likely causes are:

• invalid YAML syntax
• unsupported keys for the installed Compose version
• wrong working directory
• missing environment variables
• plugin not installed or not found on the CLI path

That is why installation checks and a minimal test file are more useful than focusing on the file size.

Common Checks After Installation

If Compose still fails, verify these basics:

1which docker
2docker compose version
3docker info
4pwd
5ls

Also validate the Compose file itself:

docker compose config

That command resolves the file and prints the normalized configuration. It is one of the fastest ways to catch syntax or environment-substitution problems.

When You Still Need Legacy docker-compose

Some older automation expects the standalone binary name. If you truly need that legacy interface, install it deliberately and understand that it is the older path. For new setups on Amazon Linux 2, the plugin-based docker compose workflow is the cleaner long-term choice.

Common Pitfalls

• Installing Docker Engine successfully but forgetting to install the Compose plugin itself.
• Looking for docker-compose when the machine only has the newer docker compose command.
• Assuming a 9 KB Compose file is too large, when the real issue is invalid YAML or a missing plugin.
• Forgetting to reconnect after adding the user to the docker group.
• Debugging the application stack before proving that a trivial Compose file works on the host.

Summary

• On Amazon Linux 2, install Docker first and verify it before working on Compose.
• Prefer the modern Compose plugin and the docker compose command.
• Install the plugin into Docker’s CLI plugin directory and verify it with docker compose version.
• Use docker compose config and a minimal test file to separate installation issues from application config issues.
• The size of the Compose file is rarely the real cause of a failure.