apiVersion: batch/v1
kind: CronJob
metadata:
  name: application-metier-postgres-offsite-backup
  namespace: application-metier
spec:
  schedule: "47 2 * * *"
  timeZone: Etc/UTC
  concurrencyPolicy: Forbid
  startingDeadlineSeconds: 3600
  successfulJobsHistoryLimit: 3
  failedJobsHistoryLimit: 3
  jobTemplate:
    spec:
      backoffLimit: 2
      activeDeadlineSeconds: 1800
      ttlSecondsAfterFinished: 86400
      template:
        metadata:
          labels:
            app.kubernetes.io/name: application-metier
            app.kubernetes.io/component: backup
            naviya.io/backup-target: offsite
        spec:
          restartPolicy: Never
          securityContext:
            runAsNonRoot: true
            runAsUser: 70
            runAsGroup: 70
            fsGroup: 70
            seccompProfile:
              type: RuntimeDefault
          containers:
            - name: pg-dump
              image: postgres:17.10-alpine
              imagePullPolicy: IfNotPresent
              command: ["sh", "-ec"]
              args:
                - |
                  umask 077

                  stamp="$(date -u +%Y%m%dT%H%M%SZ)"
                  name="application-metier-${stamp}.dump"
                  target="/offsite/daily/${name}"
                  tmp="${target}.tmp.$$"
                  checksum="${target}.sha256"
                  checksum_tmp="${checksum}.tmp.$$"

                  cleanup() {
                    rm -f "$tmp" "$checksum_tmp"
                  }
                  trap cleanup EXIT

                  pg_dump \
                    --format=custom \
                    --no-owner \
                    --no-acl \
                    --file="$tmp" \
                    "$DATABASE_URL"

                  test -s "$tmp"
                  pg_restore --list "$tmp" >/dev/null
                  mv "$tmp" "$target"

                  digest="$(sha256sum "$target" | awk '{print $1}')"

                  printf '%s  %s\n' \
                    "$digest" \
                    "$name" \
                    > "$checksum_tmp"

                  mv "$checksum_tmp" "$checksum"

                  (
                    cd /offsite/daily
                    sha256sum -c "$(basename "$checksum")"
                  )

                  pg_restore \
                    --file=/dev/null \
                    "$target"

                  echo "Sauvegarde quotidienne validée : $target"

                  copy_tmp=""
                  copy_checksum_tmp=""

                  cleanup() {
                    rm -f "$tmp" "$checksum_tmp"

                    test -z "$copy_tmp" ||
                      rm -f "$copy_tmp"

                    test -z "$copy_checksum_tmp" ||
                      rm -f "$copy_checksum_tmp"
                  }

                  copy_archive() {
                    tier="$1"
                    tier_dir="/offsite/${tier}"
                    tier_target="${tier_dir}/${name}"
                    copy_tmp="${tier_target}.tmp.$$"
                    tier_checksum="${tier_target}.sha256"
                    copy_checksum_tmp="${tier_checksum}.tmp.$$"

                    cp "$target" "$copy_tmp"

                    copy_digest="$(sha256sum "$copy_tmp" |
                      awk '{print $1}')"

                    test "$copy_digest" = "$digest"
                    mv "$copy_tmp" "$tier_target"

                    printf '%s  %s\n' \
                      "$digest" \
                      "$name" \
                      > "$copy_checksum_tmp"

                    mv \
                      "$copy_checksum_tmp" \
                      "$tier_checksum"

                    (
                      cd "$tier_dir"
                      sha256sum -c "$(basename "$tier_checksum")"
                    )

                    copy_tmp=""
                    copy_checksum_tmp=""

                    echo "Copie ${tier} validée : $tier_target"
                  }

                  if test "$(date -u +%u)" = "7"; then
                    copy_archive weekly
                  fi

                  if test "$(date -u +%d)" = "01"; then
                    copy_archive monthly
                  fi

                  find /offsite/daily \
                    -type f \
                    \( -name '*.dump' -o -name '*.dump.sha256' \) \
                    -mtime +14 \
                    -delete

                  find /offsite/weekly \
                    -type f \
                    \( -name '*.dump' -o -name '*.dump.sha256' \) \
                    -mtime +56 \
                    -delete

                  find /offsite/monthly \
                    -type f \
                    \( -name '*.dump' -o -name '*.dump.sha256' \) \
                    -mtime +370 \
                    -delete

                  find /offsite \
                    -type f \
                    -name '*.tmp.*' \
                    -mtime +1 \
                    -delete

                  trap - EXIT
                  echo "Sauvegarde externe terminée avec succès"
              env:
                - name: DATABASE_URL
                  valueFrom:
                    secretKeyRef:
                      name: application-metier-secrets
                      key: DATABASE_URL
              resources:
                requests:
                  cpu: 25m
                  memory: 64Mi
                limits:
                  cpu: 500m
                  memory: 256Mi
              securityContext:
                allowPrivilegeEscalation: false
                capabilities:
                  drop: ["ALL"]
              volumeMounts:
                - name: offsite
                  mountPath: /offsite
          volumes:
            - name: offsite
              persistentVolumeClaim:
                claimName: application-metier-postgres-backups-offsite