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<H1>[Mageia-dev] Servers downtime scheduled from Feb. 1 to 2 for maintenance</H1>
<B>Guillaume Rousse</B>
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TITLE="[Mageia-dev] Servers downtime scheduled from Feb. 1 to 2 for maintenance">guillomovitch at gmail.com
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<I>Tue Jan 31 17:50:16 CET 2012</I>
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<PRE>Le 31/01/2012 17:02, Thierry Vignaud a écrit :
><i> On 31 January 2012 15:09, Michael Scherer<<A HREF="https://www.mageia.org/mailman/listinfo/mageia-dev">misc at zarb.org</A>> wrote:
</I>>>><i> some Mageia servers will be down from Wednesday Feb. 1st to Thursday
</I>>>><i> Feb. 2nd for maintenance. Particularly, the following services will be
</I>>>><i> unavailable:
</I>>>><i> - our LDAP/user identity db,
</I>>>><i> - build system,
</I>>>><i> - Bugzilla,
</I>>>><i> - all mailing-lists hosted on ml.mageia.org,
</I>>>><i> - Wiki,
</I>>>><i> - forums.
</I>>><i> - transifex
</I>>><i> - epoll
</I>>><i> - svn, git
</I>>><i> - youri web interface
</I>>><i> - maint db
</I>>><i>
</I>>><i> in short, almost all web applications ( ie, hosted on alamut ), and the
</I>>><i> build system. See <A HREF="http://svnweb.mageia.org/adm/puppet/manifests/nodes/">http://svnweb.mageia.org/adm/puppet/manifests/nodes/</A>
</I>>><i>
</I>>><i> And to complete :
</I>>><i> - ldap will still work ( we do have a redundant setup, even if I have
</I>>><i> not finished making sure everything use the 2nd ldap in case of failure
</I>>><i> ), but readonly
</I>>><i>
</I>>><i> - mails will still be queued, so nothing should be lost
</I>>><i>
</I>>><i> We will announce on irc the exact moment when we plan to shutdown
</I>>><i> servers.
</I>><i>
</I>><i> Announce it by mail too please.
</I>><i>
</I>><i> BTW, we should try to make more stuff redundancy. Withough going up to
</I>><i> using DRBD
</I>><i> for VM images, we could:
</I>><i> - for SVN, it's easy to have at least a RO secondary server:
</I>><i> <A HREF="http://svnbook.red-bean.com/en/1.7/svn.serverconfig.httpd.html#svn.serverconfig.httpd.extra.writethruproxy">http://svnbook.red-bean.com/en/1.7/svn.serverconfig.httpd.html#svn.serverconfig.httpd.extra.writethruproxy</A>
</I>><i> if we stop write access on the master, we could wait for the slave to
</I>><i> keep up with the latest commits, then make it RW
</I>><i> when we need to stop the master.
</I>><i> - for bugzilla, have two VM who perform master-master replication; we
</I>><i> can this way
</I>><i> I'm not sure bugzilla support writing on both ends, but without
</I>><i> performing load balancing,
</I>><i> when needed, we could stop access to the active one, wait for
</I>><i> replication to finish, open
</I>><i> access on the second one
</I>Given the few downtime sofar, is this really justified ? Complexity is
rarely a synonym of high availability...
><i> - having more hypervisors and live migrating our VMs off the
</I>><i> hypervisor we update so that
</I>><i> rebooting it doesn't impact service;
</I>><i> - ...
</I>This one seems perfectly reasonable, tough, as natively supported by
hypervisors.
--
BOFH excuse #101:
Collapsed Backbone
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