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<p>Hi Kevin & Neil,</p>
<p>Many thanks for the reply. I have attached a screen shot showing
that we cannot ping between the L3 HA nodes on the router name
spaces. This was previously working fine with Mitaka, and has only
stopped working since the upgrade to Newton.</p>
<p>From the packet captures and TCP dumps, the traffic doesn't seem
to be even leaving the namespace.</p>
<p>On the attachment, the left hand side shows the state of
keepalived showing both HA agents as master and the ring hand side
is the ping attempt.</p>
<p>Regards,<br>
</p>
<div class="moz-cite-prefix">On 06/12/16 10:14, Kevin Benton wrote:<br>
</div>
<blockquote
cite="mid:CAO_F6JNkwhF2Eyu97ejaX8v9N=3thtWVx5PCNdFmWiWpCxyhRQ@mail.gmail.com"
type="cite">
<div dir="ltr">Yes, that is a misleading warning. What is
happening is that it's trying to load the interface driver as an
alias first, which results in a stevedore warning that you see
and then it falls back to loading it by the class path, which is
what you have configured. We will need to see if there is a way
we can suppress that warning somehow when we make the call to
load by an alias and it fails.
<div><br>
</div>
<div>If you switch your interface to just 'linuxbridge', that
should get rid of the warning.</div>
<div><br>
<div><br>
</div>
<div>For both L3 HA nodes becoming master, we need a little
more info to figure out the root cause. Can you try
switching into the router namespace on one of the L3 HA
nodes and see if you can ping the other router instance
across the L3 HA network for that router?</div>
</div>
</div>
<div class="gmail_extra"><br>
<div class="gmail_quote">On Mon, Dec 5, 2016 at 7:54 AM, Neil
Jerram <span dir="ltr"><<a moz-do-not-send="true"
href="mailto:neil@tigera.io" target="_blank">neil@tigera.io</a>></span>
wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0
.8ex;border-left:1px #ccc solid;padding-left:1ex">
<div dir="ltr">
<div>
<div>
<div>I have also recently been seeing 'Could not load
<whatever>InterfaceDriver' warnings from the
DHCP agent, and haven't yet understood that -
although I'm pretty sure that my interface driver is
being loaded really - or else none of my networking
function would work at all.<br>
<br>
</div>
So it's possible that that part of your report is
benign, and just a misleading warning. That said, I
am still worried about it too, and would like to
understand it properly.<br>
<br>
</div>
I'm not aware of seeing the other symptoms you
mentioned.<br>
<br>
</div>
Neil<br>
<br>
</div>
<br>
<div class="gmail_quote">
<div>
<div class="h5">
<div dir="ltr">On Mon, Dec 5, 2016 at 3:14 PM Grant
Morley <<a moz-do-not-send="true"
href="mailto:grant@absolutedevops.io"
target="_blank">grant@absolutedevops.io</a>>
wrote:<br>
</div>
</div>
</div>
<blockquote class="gmail_quote" style="margin:0 0 0
.8ex;border-left:1px #ccc solid;padding-left:1ex">
<div>
<div class="h5">
<div text="#000000" bgcolor="#FFFFFF"
class="m_-4652561670223368530gmail_msg">
<p class="m_-4652561670223368530gmail_msg">Hi All,</p>
<p class="m_-4652561670223368530gmail_msg">We have
just upgraded from Mitaka to Newton. We are
running OSA and we seem to have come across some
weird networking issues since the upgrade.
Basically network access to instances is very
intermittent and seems to randomly stop working.
<br class="m_-4652561670223368530gmail_msg">
</p>
<p class="m_-4652561670223368530gmail_msg">We are
running neutron in HA and it appears that both
of the neutron nodes are now trying to be master
and are both trying to bring up the gateway IP
addresses which would be causing conflicts. <br
class="m_-4652561670223368530gmail_msg">
</p>
<p class="m_-4652561670223368530gmail_msg">We are
also seeing a lot of the following in the
"neutron-dhcp-agent" log files:</p>
<p class="m_-4652561670223368530gmail_msg">2016-12-05
14:42:24.837 2020 WARNING stevedore.named
[req-1955d0a1-1453-4c65-a93a-<wbr>54e8ea39b230
1ac995c0729142289f7237222f3358<wbr>06
3cc95dbe91c84e3e8ebbb9893ee54d<wbr>20 - - -]
Could not load neutron.agent.linux.interface.<wbr>BridgeInterfaceDriver<br
class="m_-4652561670223368530gmail_msg">
2016-12-05 14:42:42.803 2020 INFO
neutron.agent.dhcp.agent
[req-fad7d2bb-9d3c-4192-868a-<wbr>0164b382aecf
1ac995c0729142289f7237222f3358<wbr>06
3cc95dbe91c84e3e8ebbb9893ee54d<wbr>20 - - -]
Trigger reload_allocations for port
admin_state_up=True, allowed_address_pairs=[],
binding:host_id=, binding:profile=,
binding:vif_details=, binding:vif_type=unbound,
binding:vnic_type=normal,
created_at=2016-12-05T14:42:<wbr>42Z,
description=, device_id=8752effa-2ff2-4ce1-<wbr>be70-e9f2243612cb,
device_owner=network:<wbr>floatingip,
extra_dhcp_opts=[], fixed_ips=[{u'subnet_id':
u'4ca7db2d-544a-4a97-b5a4-<wbr>3cbf2467a4b7',
u'ip_address': u'XXX.XXX.XXX.XXX'}],
id=b3cf223d-8e76-484a-a649-<wbr>d8a7dd435124,
mac_address=fa:16:3e:ff:0d:50, name=,
network_id=af5db886-0178-4f8d-<wbr>9189-f55f773b37fa,
port_security_enabled=False, project_id=,
revision_number=4, security_groups=[],
status=N/A, tenant_id=,
updated_at=2016-12-05T14:42:<wbr>42Z</p>
<p class="m_-4652561670223368530gmail_msg">I am a
bit concerned about neutron not being able to
load the Bridge interface driver.</p>
<p class="m_-4652561670223368530gmail_msg">Has
anyone else come across this at all or have any
pointers? This was working fine in Mitaka it
just seems since the upgrade to Newton, we have
these issues.</p>
<p class="m_-4652561670223368530gmail_msg">I am
able to provide more logs if they are needed.</p>
<p class="m_-4652561670223368530gmail_msg">Regards,<br
class="m_-4652561670223368530gmail_msg">
</p>
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