Helm Upgrades, Rollbacks & Release Strategy — Challenge

The goal#

Achieve the same outcome as Helm Upgrades, Rollbacks & Release Strategy, from an empty starting point, without the steps.

The chart lab taught you to build a chart. This is the other 95% of the job: upgrading it, discovering the new version does not start, and getting back to the one that did — under time pressure.

What must be true when you are done#

• Three revisions exist and helm history shows their status.
• A deliberately broken upgrade does not leave the release broken.
• You rolled back to a specific revision and verified the running image.
• You can explain what --atomic does that --wait alone does not.

Rules#

• Do not open the guided lab until you are finished, or until the same problem has held you up for 20 minutes.
• Documentation is allowed and encouraged.
• Verify every criterion with a command whose output you can read.

If you get stuck#

1. What did you expect, exactly?
2. What happened instead — the error text, not a paraphrase?
3. Which layer is that error from?
4. What is the smallest command that proves the layer below is fine?