Exercise 7: The Stampede¶

Time: 25 min
Previous: Exercise 6: The Unthinkable Error
Next: Exercise 8: A New Horizon · optional bonus: The Final Showdown

Exercise 7

Markets are in freefall. The Head of Quant needs the calculation fleet scaled from one engine to many, identical machines, on demand. Forge a golden template and stamp them out.

7.1 Forge the golden template¶

Advanced → Templates → Create:

Field	Value
Namespace	`harvester-public`
Template Name	`prod-basic`
CPU	`1`
Memory	`1 GiB`
SSH Key	`prod/default`
Volume image	your Exercise 2 cloud image
Network	`prod/service`
Label	`stage=prod`
User Data Template	`prod/prod` (if present)

Forging the golden template

Create.

7.2 Stamp the initial fleet¶

From the template → Create Virtual Machine (or Virtual Machines → Create from template):

Name	Namespace
`calc-engine-01`	`prod`
`calc-engine-02`	`prod`
`calc-engine-03`	`prod`

Wait until all three are Running.

7.3 Scale under pressure¶

Create two more from the same template:

Name
`calc-engine-04`
`calc-engine-05`

Scaling the fleet under pressure

Confirm five identical engines in prod.

7.4 Stand the fleet down¶

When the spike passes, delete calc-engine-04 and calc-engine-05 (and optionally the rest) so capacity returns to the bank. The template remains. The next spike is a few clicks, not a ticket queue.

Standing the fleet down

Check your work: /opt/suse-virt-workshop/checks/check-exercise-7.sh. This exercise has no automated grading by design (nothing later reads back state created here). The script just points you at what to verify in the UI.

Next: Exercise 8: A New Horizon · optional bonus: The Final Showdown