# One-time Job to migrate redis state from docker compose to k8s (maintenance window).
# The .example file is not applied by the deploy pipeline (mask *.example.yaml).
#
# Runbook:
#   1. docker compose -f <repo>/edu_master/compose.yaml stop        # SIGTERM -> redis will flush dump.rdb
#   2. docker run --rm -v edu_master_redis-data:/data \
#        -v /tmp/edu-master-backup:/backup \
#        redis:alpine sh -c "cp /data/dump.rdb /backup/ && ls -la /backup"
#   3. kubectl apply -f edu_master/k8s/namespace.yaml
#   4. kubectl apply -f <only the PVC from redis.yaml>              # seed must come BEFORE redis pod starts
#   5. kubectl apply -f edu_master/k8s/restore-seed-job.yaml.example
#      kubectl wait --for=condition=complete job/redis-restore-seed -n edu-master --timeout=120s
#   6. kubectl delete job redis-restore-seed -n edu-master
#   7. kubectl apply -f edu_master/k8s/ -R                           # apply remaining manifests
apiVersion: batch/v1
kind: Job
metadata:
  name: redis-restore-seed
  namespace: edu-master
spec:
  backoffLimit: 2
  ttlSecondsAfterFinished: 3600
  template:
    spec:
      restartPolicy: Never
      containers:
        - name: seed
          image: redis:alpine
          command:
            - /bin/sh
            - -ec
            - |
              ls -la /backup
              cp /backup/dump.rdb /data/dump.rdb
              chmod 644 /data/dump.rdb
              ls -la /data
          volumeMounts:
            - name: redis-data
              mountPath: /data
            - name: backup
              mountPath: /backup
              readOnly: true
      volumes:
        - name: redis-data
          persistentVolumeClaim:
            claimName: redis-data-pvc
        - name: backup
          hostPath:
            path: /tmp/edu-master-backup
            type: DirectoryOrCreate