---
# Syncs Nextcloud's file PVC content (nextcloud-nextcloud, 200Gi) to the VPS
# MinIO backup receiver via restic. The one piece of the Nextcloud backup story
# no operator covers - actual file blobs, not database rows (DB is handled by
# CNPG's barmanObjectStore in cnpg-cluster.yaml).
#
# Caveat: this backs up the live-mounted volume with no application-level
# quiesce (no Nextcloud maintenance-mode pause around the snapshot). Acceptable
# for a no-real-data test environment; for anything with real user data, pair
# this with `occ maintenance:mode --on` before / `--off` after.
#
# Uses podAffinity to land on the same node as a running Nextcloud pod, since
# the PVC is RWO (Ceph RBD) - RWO allows multiple pods to mount it concurrently
# only when co-located on the same node. Verify the label selector below
# matches the actual Nextcloud chart's pod labels before relying on this.
apiVersion: generators.external-secrets.io/v1alpha1
kind: Password
metadata:
  name: nextcloud-restic-password
  namespace: nextcloud
spec:
  length: 48
  digits: 5
  symbols: 5
  symbolCharacters: "-_$@"
  noUpper: false
  allowRepeat: true
---
apiVersion: external-secrets.io/v1
kind: ExternalSecret
metadata:
  name: nextcloud-restic-password
  namespace: nextcloud
spec:
  refreshInterval: "0"  # generate once - changing this after the repo is initialized would lock you out of existing backups
  target:
    name: nextcloud-restic-password
    creationPolicy: Owner
  data: []
  dataFrom:
    - sourceRef:
        generatorRef:
          apiVersion: generators.external-secrets.io/v1alpha1
          kind: Password
          name: nextcloud-restic-password
---
apiVersion: batch/v1
kind: CronJob
metadata:
  name: nextcloud-pvc-sync
  namespace: nextcloud
spec:
  schedule: "0 2 * * *"  # daily at 02:00 - bulky, don't run it as often as the DB backups
  concurrencyPolicy: Forbid
  successfulJobsHistoryLimit: 3
  failedJobsHistoryLimit: 3
  jobTemplate:
    spec:
      backoffLimit: 2
      template:
        spec:
          restartPolicy: Never
          securityContext:
            runAsNonRoot: true
            runAsUser: 65534
            seccompProfile:
              type: RuntimeDefault
          affinity:
            podAffinity:
              requiredDuringSchedulingIgnoredDuringExecution:
                - labelSelector:
                    matchLabels:
                      app.kubernetes.io/name: nextcloud
                  topologyKey: kubernetes.io/hostname
          containers:
            - name: restic-backup
              image: restic/restic:0.16.4
              securityContext:
                allowPrivilegeEscalation: false
                capabilities:
                  drop: ["ALL"]
              command:
                - /bin/sh
                - -c
                - |
                  set -eu
                  export RESTIC_REPOSITORY="s3:http://${VPS_MINIO_ENDPOINT}/nextcloud-files/restic-repo"
                  export RESTIC_PASSWORD_FILE=/restic-secret/password
                  export AWS_ACCESS_KEY_ID="${MINIO_ACCESS_KEY}"
                  export AWS_SECRET_ACCESS_KEY="${MINIO_SECRET_KEY}"

                  restic snapshots >/dev/null 2>&1 || restic init

                  echo "==> Backing up /data..."
                  restic backup /data --tag nextcloud --host nextcloud-k8s

                  echo "==> Pruning: keep 7 daily, 4 weekly, 6 monthly..."
                  restic forget --tag nextcloud --host nextcloud-k8s \
                    --keep-daily 7 --keep-weekly 4 --keep-monthly 6 --prune

                  echo "==> Done."
              env:
                # Locally-terminated socat forward on the VPS host to
                # MinIO's ClusterIP, not the NodePort - see
                # infrastructure/vault/manifests/raft-snapshot-cronjob.yaml
                # for why (Netbird has no DNS, and blocks new forwarded
                # connections through a peer by default).
                - name: VPS_MINIO_ENDPOINT
                  value: "100.108.113.41:9000"
                - name: MINIO_ACCESS_KEY
                  valueFrom:
                    secretKeyRef:
                      name: vps-minio-secret
                      key: accesskey
                - name: MINIO_SECRET_KEY
                  valueFrom:
                    secretKeyRef:
                      name: vps-minio-secret
                      key: secretkey
              volumeMounts:
                - name: nextcloud-data
                  mountPath: /data
                  readOnly: true
                - name: restic-secret
                  mountPath: /restic-secret
                  readOnly: true
          volumes:
            - name: nextcloud-data
              persistentVolumeClaim:
                claimName: nextcloud-nextcloud
            - name: restic-secret
              secret:
                secretName: nextcloud-restic-password
                items:
                  - key: password
                    path: password