Exercises

In this chapter, we have covered Docker Swarm and the clustering process in detail. In order to enhance this knowledge, we recommend the following exercises:

1. Set up a swarm cluster that consists of three nodes:

• • Use one machine as the manager node and two machines as worker nodes
  • You can use physical machines connected to one network, machines from the cloud provider, or VirtualBox machines with the shared network
  • Check that the cluster is configured properly using the docker node command

2. Run/scale a hello world service on the cluster:

• • The service can look exactly the same as described in the exercises for Chapter 2, Introducing Docker
  • Publish the port so that it will be accessible from outside of the cluster
  • Scale the service to five replicas
  • Make a request to the "hello world" service and check which of the containers is serving the request
  ...