This lesson introduces Docker orchestration.

Objectives and Skills

Objectives and skills for this lesson include:^[1]

• Complete the setup of a swarm mode cluster, with managers and worker nodes
• State the differences between running a container vs running a service
• Demonstrate steps to lock a swarm cluster
• Extend the instructions to run individual containers into running services under swarm
• Interpret the output of “docker inspect” commands
• Convert an application deployment into a stack file using a YAML compose file with “docker stack deploy”
• Manipulate a running stack of services
• Increase number of replicas
• Illustrate running a replicated vs global service
• Mount volumes
• Add networks, publish ports
• Identify the steps needed to troubleshoot a service not deploying
• Apply node labels to demonstrate placement of tasks
• Sketch how a Dockerized application communicates with legacy systems
• Paraphrase the importance of quorum in a swarm cluster
• Demonstrate the usage of templates with “docker service create”

Readings

Multimedia

Activities

Lesson Summary

Key Terms

See Also

References