- Lab
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Libraries: If you want this lab, consider one of these libraries.
- Core Tech
Managing Docker Swarm
Docker Swarm lets you manage the deployment of containerized applications and services across a cluster—or swarm—of linked Docker Engine hosts. These hosts are managed by a single Docker Swarm Manager, which deploys, scales, and otherwise manages the applications and services deployed to the worker Docker nodes. In this lab, you will configure a three-node Docker Swarm cluster, then deploy and scale a service across all three nodes, as well as test the resiliency of the service deployment should a node go down.
Lab Info
Table of Contents
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Challenge
Initializing a Docker Swarm cluster
Configure Ubuntu Docker Swarm Manager to function as a Docker Swarm host, as the manager and leader. Ensure the Swarm host is using
172.31.24.10on the default Docker Swarm port as its advertised address. -
Challenge
Adding Docker Engine instances to the Swarm cluster
Add Ubuntu Docker Swarm Worker 1 and Ubuntu Docker Swarm Worker 2 to the Swarm cluster, ensuring they are worker nodes not manager/leader nodes.
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Challenge
Deploying and scaling service containers to the Swarm
Deploy a
webtestservice using thenginx:alpineimage, mapping published port8080to80on the container, and ensuring no more than two replicas can be hosted on a single node. Scale the service up to 5 replicas, then check how it has been distributed across the Swarm. Finally, test Swarm resiliency by draining Ubuntu Docker Worker 1 and ensuring the replicas hosted on the worker have been reassigned.
Real skill practice before real-world application
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