erp5.zeo: Expire backup index after 2 days.

Do not expose a parameter, as index can be reconstructed from data anyway.
Rotating is anyway needed as index backup can take a significant amount of
space for rare practical use.
Also, remove this point from TODO.

stack/erp5/TODO

-Release-critical:
-- expire repozo FileStorage index backups (can take a lot of space)
-
 General:
 - varnish/squid
 - enable zope webdav service and provide access through haproxy & backend apache

stack/erp5/buildout.cfg

@@ -306,7 +306,7 @@ md5sum = 7735d535aa34dfdc18a776b80bc0ca3d
 [template-zeo]
 < = download-base
 filename = instance-zeo.cfg.in
-md5sum = 537454dcd64330ddb0360c05526b7824
+md5sum = 6b99d2712aff3a8a717400a557dc5191
 
 [template-zope]
 < = download-base

stack/erp5/instance-zeo.cfg.in

@@ -44,6 +44,7 @@ ipv4 = {{ ipv4 }}
 ipv6 = {{ ipv6 }}
 {% endif -%}
 
+{% set backup_directory_list = [] -%}
 {% for export_id, mountpoint_dict in slapparameter_dict['zodb-dict'].items() -%}
 {%   do storage_dict.setdefault(
        mountpoint_dict.get('storage-family', 'default').lower(), []
@@ -67,10 +68,12 @@ ipv6 = {{ ipv6 }}
          client_dict,
        ]) -%}
 {%     if tidstorage_dict != None -%}
+{%       set backup_directory = tidstorage_dict.get('zodb-dict', {}).get(export_id, '%(backup)s/%(name)s') % {'backup': zodb_backup_path, 'name': export_id} -%}
+{%       do backup_directory_list.append(backup_directory) -%}
 {%       do known_tid_storage_identifier_dict.__setitem__(
            json_module.dumps((known_tid_storage_identifier_host, export_id)), (
              export_storage_dict['path'],
-             tidstorage_dict.get('zodb-dict', {}).get(export_id, '%(backup)s/%(name)s') % {'backup': zodb_backup_path, 'name': export_id},
+             backup_directory,
              mount_point,
            ),
          ) -%}
@@ -169,6 +172,15 @@ name = tidstorage
 time = {{ dumps(tidstorage_dict.get('periodicity', 'daily')) }}
 command = ${tidstorage:repozo-wrapper}
 
+{% if backup_directory_list -%}
+[{{ section("cron-entry-purge-repozo-fsindex") }}]
+recipe = slapos.cookbook:cron.d
+cron-entries = ${cron:cron-entries}
+name = purge-repozo-fsindex
+time = ${cron-entry-tidstorage-backup:time}
+command = {{ parameter_dict['findutils-location'] }}/bin/find {% for backup_directory in backup_directory_list %}'{{ backup_directory.replace("\\", "\\\\").replace("'", "\\'") }}' {% endfor %}-name "????-??-??-??-??-??.index" -daystart -mtime +2 -delete
+
+{% endif -%}
 [{{ section("logrotate-tidstorage") }}]
 < = logrotate-base
 name = tidstorage