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By Kevin McAleer, 3 Minutes
After defining your multi-container application with a Docker Compose file, the next step is deploying it as a stack in your Docker Swarm cluster. This lesson walks you through the deployment process, highlighting how Docker Swarm interprets your Compose file to distribute services across the cluster.
Deploying a stack in Docker Swarm involves taking a Docker Compose file and using it to set up all the defined services across the nodes in the Swarm. This approach leverages Swarm’s orchestration capabilities to manage service scaling, placement, and networking.
Before deploying your stack, ensure that:
Deploy the Stack:
Execute the following command to deploy your stack:
docker stack deploy -c docker-compose.yml <STACK_NAME>
Replace <STACK_NAME> with a name for your stack. This name is used to manage the stack after deployment.
<STACK_NAME>
To check the status of your stack, use:
docker stack services <STACK_NAME>
This command lists the services within the stack, along with their current state, replicas, and port mappings.
After deployment, Docker Swarm provides several commands to manage your stack:
docker service scale
docker stack deploy
docker stack rm <STACK_NAME>
depends_on
Deploying a stack in Docker Swarm transforms your Docker Compose-defined applications into a scalable, resilient system spread across multiple nodes. This lesson covered the essentials of deploying and managing your stack, setting the stage for advanced service orchestration and management strategies in a distributed environment. With your application now running as a stack, you’re leveraging the full power of Docker Swarm for your deployment needs.
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