{
  "id": "deployment-rollback",
  "title": "Rolling Back a Deployment",
  "category": "Workloads & Scheduling",
  "difficulty": "Easy",
  "type": "task",
  "weight": 5,
  "description": "## Rolling Back a Deployment\n\nA deployment `api-server` was mistakenly updated to a broken image. Your task is to roll it back to the previous working revision.\n\n**Your task:**\n\nRoll back the `api-server` deployment to its previous revision.\n\n> 💡 Tip: Check `kubectl rollout --help` for subcommands that deal with revision history.",
  "hints": [
    {
      "title": "Undo a rollout",
      "body": "`kubectl rollout undo deployment/<name>` reverts to the previous revision. Use `--to-revision=N` to go to a specific revision number.",
      "command": "kubectl rollout undo deployment/api-server"
    }
  ],
  "setup_commands": [
    {
      "command": "kubectl create deployment api-server --image=nginx:1.24 --replicas=2 2>/dev/null || true"
    },
    {
      "command": "kubectl rollout status deployment/api-server --timeout=60s"
    },
    {
      "command": "kubectl set image deployment/api-server nginx=nginx:broken-image"
    }
  ],
  "validation": {
    "commands": [
      {
        "description": "Deployment 'api-server' image rolled back to nginx:1.24",
        "command": "kubectl get deployment api-server -o jsonpath='{.spec.template.spec.containers[0].image}'",
        "expected_output": "nginx:1.24",
        "match": "exact"
      }
    ]
  },
  "default_namespace": "default",
  "teardown_commands": [
    {
      "command": "kubectl delete deployment api-server --ignore-not-found"
    }
  ]
}
