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DReispt
Asked: 2012-12-21 03:17:51 +0800 CST

Warn users that the server is under maintenance

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From time to time, an OpenERP production server needs some maintenance: upgrading a few modules, probably having a server restart.

My issue is, I would like to have a way to stop regular users to access the server. For example, by returning to them a "under maintenance" message.

What would be the best solution for this?

odoo

2 Answers

  1. Best Answer

    If the server is rebooting, usually you'll need some kind of failover IP or at least a caching proxy in front of the application server (in this case, OpenERP) to tell the user that it's down. Otherwise, while the server is offline, you'll just get a generic browser error message returned to the client, like "server not found" or similar.

    In short, the best way to do this is to have another physical/virtual server sitting in front of the application server that is "always" up (or a cluster of servers that are rebooted independently), so that you always have something resolving the domain name or can fail over to a backup if the primary is down due to crashes or reboots.

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  2. This is not the best way to do it, but it's a useful hack:

    Edit the server's openerp\addons\base\res\res_users.py file. At the beginning of the def check(self, db, uid, passwd): method add:

        if uid != openerp.SUPERUSER_ID:
        raise osv.except_osv(_('UNDER MAINTENANCE'), _('This service is temporarily down for maintenance.'))

    On the next restart, server will stop accepting users other than admin.

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