version: 1
id: kubernetes-backup-restore
title: Backup and Restore Cluster Objects
summary: Snapshot critical manifests, simulate an accidental delete, and restore the payments ConfigMap from backup.
difficulty: advanced
estimatedMinutes: 35
prerequisites: [kubernetes-storage]
image: alpine/k8s:1.31.4
shell: /bin/bash
runtime:
  type: k3d
setup:
  - "kubectl create namespace payments >/dev/null"
  - "kubectl -n payments create configmap api-config --from-literal=LOG_LEVEL=info --from-literal=REGION=eu-west-1"
  - "kubectl -n payments create deploy api --image=nginx:1.27-alpine --replicas=1"
  - "mkdir -p /workspace/backup"
tasks:
  - id: restore-config
    title: Recover the deleted ConfigMap
    description: 'Backup the payments ConfigMap api-config to /workspace/backup/api-config.yaml, delete the live ConfigMap to simulate an accident, restore it from the backup file, and write /workspace/backup/RESTORE.md noting what was restored and why backups must be tested.'
    hints:
      - kubectl -n payments get configmap api-config -o yaml > /workspace/backup/api-config.yaml
      - kubectl -n payments delete configmap api-config
      - kubectl apply -f /workspace/backup/api-config.yaml
      - RESTORE.md should mention api-config and tested (or test).
    checks:
      - type: file
        name: Backup file exists
        path: /workspace/backup/api-config.yaml
        value: api-config
      - type: file
        name: Backup has LOG_LEVEL
        path: /workspace/backup/api-config.yaml
        value: LOG_LEVEL
      - type: kubernetes
        name: ConfigMap restored
        command: kubectl -n payments get configmap api-config -o yaml | grep -q LOG_LEVEL
      - type: kubernetes
        name: REGION retained
        command: "kubectl -n payments get configmap api-config -o jsonpath='{.data.REGION}' | grep -q eu-west-1"
      - type: file
        name: Restore notes written
        path: /workspace/backup/RESTORE.md
        value: api-config
      - type: file
        name: Mentions testing backups
        path: /workspace/backup/RESTORE.md
        value: test
limits: {cpus: "1.0", memory: 512m, pids: 256, timeout: 3600, network: true}