I can't answer your question because I use Ubuntu and updating the OS is fairly simple. But I did want offer some advice. I also started out having my DRBD nodes mounting their storage over iSCSI. It worked fine but I got significant performance improvements by using local storage instead. In my situation I was able to pull the hard drives out of the NAS and put them directly in the server.<br>
<br><div class="gmail_quote">On Thu, Jun 7, 2012 at 8:43 AM, Marcelo Pereira <span dir="ltr"><<a href="mailto:marcelops@gmail.com" target="_blank">marcelops@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
Hello Everybody,<div><br></div><div>I have got a very simple (and probably basic) question.</div><div><br></div><div>What are the best practices when updating the "operation system" where I have a DRBD volume?</div>
<div><br></div><div>Here is the map of my servers:</div><div><ul><li>Linux (CentOS 5.8)-- this is my <b>primary</b> server, which the DRBD tools installed in</li><ul><li>OpenFiler (this is my <b>primary</b> hot-swapable storage unit)</li>
</ul></ul></div><div><div><ul><li>Linux (CentOS 5.8)-- this is my <b>secondary</b> server, which the DRBD tools installed in</li><ul><li>OpenFiler (this is my <b>secondary</b> hot-swapable storage unit)</li></ul></ul><div>
Each Linux server mounts the volume from his related OpenFiler unit through iscsi, and then I use DRBD to mirror them. It's working perfectly now.</div></div></div><div><br></div><div>I had to do some maintenance a couple of months ago, updating the CentOS from 5.2 to 5.8, which was very straightforward. Then I updated the DRBD from 8.2.6 to 8.3.12, which was pretty good as well.</div>
<div><br></div><div>Now I need to update the operational system, from CentOS 5.8 to CentOS 6.2, and I can't do it as a simple software update (since CentOS doesn't support such a feature). That said, I will have to reinstall to SO on the servers (I'm not touching the storage units, though).</div>
<div><br></div><div>What would be a best practice in this case, in order to "replace" these servers and keep the storage units the way they are now? I wish I could simply reinstall the OS, remap the units, configure DRBD and sync, but I want to know what is the golden path to do so.</div>
<div><br></div><div>Thanks,</div><div>Marcelo</div>
<br>_______________________________________________<br>
drbd-user mailing list<br>
<a href="mailto:drbd-user@lists.linbit.com">drbd-user@lists.linbit.com</a><br>
<a href="http://lists.linbit.com/mailman/listinfo/drbd-user" target="_blank">http://lists.linbit.com/mailman/listinfo/drbd-user</a><br>
<br></blockquote></div><br><br clear="all"><div><br></div>-- <br>J.R. Lillard<div>System / Network Admin</div><div>Web Programmer</div><div>Golden Heritage Foods</div><div>120 Santa Fe St.</div><div>Hillsboro, KS 67063</div>
<br>