<div dir="ltr"><div>Hi George,</div><div><br></div>All instances have only a single interface.<div><br></div><div>Thanks,</div><div>Joe</div></div><div class="gmail_extra"><br><div class="gmail_quote">On Tue, Jan 27, 2015 at 1:38 PM, George Shuklin <span dir="ltr"><<a href="mailto:george.shuklin@gmail.com" target="_blank">george.shuklin@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div text="#000000" bgcolor="#FFFFFF">
How many network interfaces have your instance? If more than one -
check settings for second network (subnet). It can have own dhcp
settings which may mess up with routes for the main network.<div><div class="h5"><br>
<br>
<div>On 01/27/2015 06:08 PM, Joe Topjian
wrote:<br>
</div>
</div></div><blockquote type="cite"><div><div class="h5">
<div dir="ltr">Hello,
<div><br>
</div>
<div>I have run into two different OpenStack clouds where
instances running either RHEL 7 or CentOS 7 images are
randomly losing their network gateway.</div>
<div><br>
</div>
<div>There's nothing in the logs that show any indication of
why. There's no DHCP hiccup or anything like that. The gateway
has just disappeared.</div>
<div><br>
</div>
<div>If I log into the instance via another instance (so on the
same subnet since there's no gateway), I can manually re-add
the gateway and everything works... until it loses it again.</div>
<div><br>
</div>
<div>One cloud is running Havana and the other is running
Icehouse. Both are using nova-network and both are Ubuntu
12.04.</div>
<div><br>
</div>
<div>On the Havana cloud, we decided to install the dnsmasq
package from Ubuntu 14.04. This looks to have resolved the
issue as this was back in November and I haven't heard an
update since.</div>
<div><br>
</div>
<div>However, we don't want to do that just yet on the Icehouse
cloud. We'd like to understand exactly why this is happening
and why updating dnsmasq resolves an issue that only one
specific type of image is having.</div>
<div><br>
</div>
<div>I can make my way around CentOS, but I'm not as familiar
with it as I am with Ubuntu (especially CentOS 7). Does anyone
know what change in RHEL7/CentOS7 might be causing this? Or
does anyone have any other ideas on how to troubleshoot the
issue? </div>
<div><br>
</div>
<div>I currently have access to two instances in this state, so
I'd be happy to act as remote hands and eyes. :)</div>
<div><br>
</div>
<div>Thanks,</div>
<div>Joe</div>
</div>
<br>
<fieldset></fieldset>
<br>
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