mongodb: Add database backups

roles/mongodb/templates/mongodb-backup.sh.j2

@@ -0,0 +1,28 @@
+#!/bin/sh
+
+set -eu
+
+umask 027
+
+DESTDIR="/srv/backup"
+DATE="$(date +%Y-%m-%d)"
+
+cd "$DESTDIR"
+find . -xdev -mindepth 2 -maxdepth 2 -type f -mtime +30 \
+    -execdir rm -f -- {} \;
+find . -xdev -depth -mindepth 1 -maxdepth 1 -type d -empty \
+    -execdir rmdir -- {} \;
+
+mkdir -m 2750 "$DATE"
+chgrp backup "$DATE"
+
+mongodump \
+    --sslPEMKeyFile=/etc/pki/tls/private/mongodb.pem \
+    --sslCAFile=/etc/pki/tls/certs/ca.crt \
+    --ssl \
+    --username=backup \
+    --password="{{ mongodb_backup_password }}" \
+    --gzip \
+    --out="${DATE}" \
+    --quiet \
+    --uri="mongodb://$(hostname -f)/"