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Linux Beginner About 25 min +150 XP

Storefront Stuck in Maintenance Mode

Every Northstar Shops storefront page answers 503 with the maintenance banner, and checkout has taken no orders for 20 minutes.

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Stage 1 of 5 in Linux Outage Ladder.

Briefing

Northstar Shops drained the storefront at 00:14 for a release, rolled the release back at 00:22, and the maintenance banner never came down.

Checkout has taken no orders since, and the networking responder is waiting on this host before touching the API path.

Inspired by a real outage: Rollback restores code but not runtime configuration (FixOps composite of public postmortem patterns). Names and details are fictionalized.

The fix is yours to find: hints, the recovery checks and the debrief unlock inside the incident.

How it plays

  1. 01

    Get paged

    The alert fires and the clock starts. Read the page and the briefing.

  2. 02

    Investigate

    Work in a simulated shell with realistic output: logs, configs, services.

  3. 03

    Fix it

    Change the system the way you would in production. Hints are there if you get stuck.

  4. 04

    Prove it

    Automated checks verify the recovery, then the debrief explains what happened.

All 61 incidents
Networking Intermediate

Storefront API Calls Fail

Storefront pages load again, but cart, search and checkout calls through /api fail for every customer.

+210 XP30 minStage 2/5

Linux Intermediate

Incident Notes Service Fails to Start

The internal incident notes service is down, leaving responders to coordinate the outage from chat scrollback.

+200 XP30 minStage 3/5

Security Intermediate

Hotfix Deploy Blocked

The stabilization hotfix is staged, but deploy.service cannot be restarted to ship it.

+205 XP25 minStage 4/5

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