Getting Started with HashiCorp Nomad - Demo - Job Placement

The video tutorial demonstrates how to manage job placements for a Tetris app using Nomad. Initially, the job is run with bin packing, leading to uneven distribution across nodes. To improve high availability, a spread stanza is added to the job configuration, ensuring even distribution. A fourth node is introduced in a different availability zone, and the spread configuration is updated to allocate jobs based on zone. The tutorial highlights the use of CLI and UI for managing and visualizing job allocations.

What was the initial allocation strategy used for the Tetris app job?

• Round Robin

• Bin Packing

• Spread

• Random

What was the main issue with the initial bin packing strategy?

• It concentrated allocations on fewer nodes, risking high availability.

• It spread allocations evenly across all nodes.

• It required manual intervention for job allocation.

• It failed to allocate any jobs.

How does the spread strategy differ from bin packing?

• It allocates jobs randomly.

• It spreads jobs evenly across all nodes.

• It requires more manual configuration.

• It concentrates jobs on fewer nodes.

What command is used to stop a Nomad job?

• nomad job halt

• nomad job terminate

• nomad job stop

• nomad job end

Why was a fourth node added to the cluster?

• To increase the number of allocations per node.

• To test the spread strategy across different availability zones.

• To replace a faulty node.

• To reduce the overall number of nodes.

What attribute was used to spread allocations based on availability zones?

• node.capacity

• platform.aws.placement.availability_zone

• platform.aws.region

• node.unique.id

What percentage of allocations was directed to the new availability zone?

• 50%

• 25%

• 75%

• 100%

What was the result of applying the updated spread configuration?

• Allocations were concentrated on the original nodes.

• All allocations were directed to a single node in the new availability zone.

• Allocations were evenly spread across all nodes.

• No allocations were made.

What is the default allocation strategy in Nomad?

• Round Robin

• Spread

• Random

• Bin Packing

What was the purpose of the lab demonstration?

• To highlight the limitations of Nomad.

• To showcase the use of the CLI only.

• To show how to manually allocate jobs.

• To demonstrate the impact of different allocation strategies.