Leveraging Docker Compose simplifies the process of managing Docker containers, including their updates. If you've already acquainted yourself with downloading and using Docker containers, updating them will be a breeze.
- Data Persistence: One crucial aspect to remember is the potential data loss during the container update process. Unless you've configured persistent volumes in your
docker-compose.ymlfile, updating your container might wipe out data associated with it. Essentially, it would be like setting up the container anew.
- Identifying Persistent Volumes: In your Docker Compose file, you can identify persistent volumes with the
volumes:tag. Here's a quick example:
# - UID=1000
# - GID=1000
With that out of the way, let's get to updating!
Fetch the Latest Image: Navigate to your container's directory that houses the Docker Compose file. Execute the command:
docker compose pull
Docker will relay an output indicating whether it's pulling the newest container image.
Deploy the Updated Container: With the latest image in tow, deploy the container using:
docker compose up -d
Docker will refresh the container using this new image. The entire process appears as follows:
Note: If your container is already updated, Docker will provide a specific output notifying you of the same.
Conclusion & What's Next
There you have it—an efficient way to keep your Docker containers updated using Docker Compose. The entire process is streamlined into two primary commands.
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