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Task 09 — Exec Rescue (Five Bugs)

How to evaluate

csot challenge start -w week-02 -t 09
# SSH in with printed host, port, password
# cd ~/incident-09 — fix the stack on the VM
csot challenge verify

Fix inside the running container via SSH (docker exec). No image rebuild.

Production freeze: no image rebuild. Fix the running container from inside with an idempotent fix.sh.

Bugs stacked in the container: 1. Stale /tmp/app.lock 2. /app/data owned by root (app runs as uid 10001) 3. .runtime.env has API_MODE=dev 4. Broken config.json symlink 5. Missing internal.api in /etc/hosts

What the grader checks

  • fix.sh exits 0 and starts the app (5 pts)
  • GET /health → 200 (5 pts)
  • POST /api/heartbeat → 201/200 (4 pts)

Points: 14

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