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<div class="markdown-here-wrapper" data-md-url="Thunderbird"
style="">
<p style="margin: 0px 0px 1.2em ! important;">So..</p>
<p style="margin: 0px 0px 1.2em ! important;">On 07/12/2017 03:12,
Jean-Philippe Evrard wrote:</p>
<p style="margin: 0px 0px 1.2em ! important;"></p>
<div class="markdown-here-exclude">
<p></p>
<blockquote type="cite"
cite="mid:CAEhFLkQpDNiWo_5fNzKADPnpTtHVdbL2HqVLYQjmgNpasoVY4A@mail.gmail.com"
style="font-size: medium;">
<pre wrap="">For the mtu, it would be impactful to do it on a live environment. I
expect that if you change the container configuration, it would
restart.</pre>
</blockquote>
<p></p>
</div>
<p style="margin: 0px 0px 1.2em ! important;"></p>
<p style="margin: 0px 0px 1.2em ! important;">It’s a busy lab
environment, but given that it’s fully HA (2 controllers), I
didn’t anticipate a significant problem with changing container
configuration one-at-a-time.</p>
<p style="margin: 0px 0px 1.2em ! important;">However, the change
has had an unexpected side effect - one of the controllers (I
haven’t rebooted the other one yet) seems to have lost the
ability to bring up lxcbr0, and so while it can start all its
containers, none of them have any management connectivity on
eth0, which of course breaks all sorts of things.</p>
<p style="margin: 0px 0px 1.2em ! important;">I.e.</p>
<pre style="font-size: 0.85em; font-family: Consolas,Inconsolata,Courier,monospace;font-size: 1em; line-height: 1.2em;margin: 1.2em 0px;"><code style="font-size: 0.85em; font-family: Consolas,Inconsolata,Courier,monospace;margin: 0px 0.15em; padding: 0px 0.3em; white-space: pre-wrap; border: 1px solid rgb(234, 234, 234); background-color: rgb(248, 248, 248); border-radius: 3px; display: inline;white-space: pre; overflow: auto; border-radius: 3px; border: 1px solid rgb(204, 204, 204); padding: 0.5em 0.7em; display: block ! important;">root@nbs-dh-10:~# systemctl status networking.service
● networking.service - Raise network interfaces
Loaded: loaded (/lib/systemd/system/networking.service; enabled; vendor preset: enabled)
Drop-In: /run/systemd/generator/networking.service.d
└─50-insserv.conf-$network.conf
Active: failed (Result: exit-code) since Thu 2017-12-07 06:37:00 NZDT; 14min ago
Docs: man:interfaces(5)
Process: 2717 ExecStart=/sbin/ifup -a --read-environment (code=exited, status=1/FAILURE)
Process: 2656 ExecStartPre=/bin/sh -c [ "$CONFIGURE_INTERFACES" != "no" ] && [ -n "$(ifquery --read-environment --list --exclude=lo)" ] && udevadm settle (code=e
Main PID: 2717 (code=exited, status=1/FAILURE)
Dec 07 06:36:58 nbs-dh-10 systemd[1]: Starting Raise network interfaces...
Dec 07 06:36:58 nbs-dh-10 ifup[2717]: RTNETLINK answers: Invalid argument
Dec 07 06:36:58 nbs-dh-10 ifup[2717]: /sbin/ifup: waiting for lock on /run/network/ifstate.enp4s0
Dec 07 06:36:58 nbs-dh-10 ifup[2717]: /sbin/ifup: waiting for lock on /run/network/ifstate.br-mgmt
Dec 07 06:37:00 nbs-dh-10 ifup[2717]: /sbin/ifup: waiting for lock on /run/network/ifstate.br-vlan
Dec 07 06:37:00 nbs-dh-10 ifup[2717]: Failed to bring up lxcbr0.
Dec 07 06:37:00 nbs-dh-10 systemd[1]: networking.service: Main process exited, code=exited, status=1/FAILURE
Dec 07 06:37:00 nbs-dh-10 systemd[1]: Failed to start Raise network interfaces.
Dec 07 06:37:00 nbs-dh-10 systemd[1]: networking.service: Unit entered failed state.
Dec 07 06:37:00 nbs-dh-10 systemd[1]: networking.service: Failed with result 'exit-code'.
root@nbs-dh-10:~#
</code></pre>
<p style="margin: 0px 0px 1.2em ! important;">I’ve manually
reversed the “lxc.network.mtu = 1550” entry in
/etc/lxc/lxc-openstack.conf, but this doesn’t seem to have made
a difference.</p>
<p style="margin: 0px 0px 1.2em ! important;">What’s also odd is
that lxcbr0 appears to be perfectly normal:</p>
<pre style="font-size: 0.85em; font-family: Consolas,Inconsolata,Courier,monospace;font-size: 1em; line-height: 1.2em;margin: 1.2em 0px;"><code style="font-size: 0.85em; font-family: Consolas,Inconsolata,Courier,monospace;margin: 0px 0.15em; padding: 0px 0.3em; white-space: pre-wrap; border: 1px solid rgb(234, 234, 234); background-color: rgb(248, 248, 248); border-radius: 3px; display: inline;white-space: pre; overflow: auto; border-radius: 3px; border: 1px solid rgb(204, 204, 204); padding: 0.5em 0.7em; display: block ! important;">root@nbs-dh-10:~# brctl show lxcbr0
bridge name bridge id STP enabled interfaces
lxcbr0 8000.fe0a7fa28303 no 04063403_eth0
075266dc_eth0
160c9b30_eth0
38ac19ae_eth0
4f57300f_eth0
59b2b5a5_eth0
5b7bbeb4_eth0
64a1fcdd_eth0
6c99f5fe_eth0
6f93ebb2_eth0
70ce61e5_eth0
745ba80d_eth0
85df2fa5_eth0
99e6adf8_eth0
cbdfa2f3_eth0
e15dc279_eth0
ea67ce7e_eth0
ed5c7af9_eth0
root@nbs-dh-10:~#
</code></pre>
<p style="margin: 0px 0px 1.2em ! important;">… But, no matter the
value of lxc.network.mtu, it doesn’t change from 1500 (I suppose
this could actually have reduced itself based on the lower MTUs
of the member interfaces though):</p>
<pre style="font-size: 0.85em; font-family: Consolas,Inconsolata,Courier,monospace;font-size: 1em; line-height: 1.2em;margin: 1.2em 0px;"><code style="font-size: 0.85em; font-family: Consolas,Inconsolata,Courier,monospace;margin: 0px 0.15em; padding: 0px 0.3em; white-space: pre-wrap; border: 1px solid rgb(234, 234, 234); background-color: rgb(248, 248, 248); border-radius: 3px; display: inline;white-space: pre; overflow: auto; border-radius: 3px; border: 1px solid rgb(204, 204, 204); padding: 0.5em 0.7em; display: block ! important;">root@nbs-dh-10:~# ifconfig lxcbr0
lxcbr0 Link encap:Ethernet HWaddr fe:0c:5d:1c:36:da
inet addr:10.0.3.1 Bcast:10.0.3.255 Mask:255.255.255.0
inet6 addr: fe80::f4b0:bff:fec3:63b0/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:499 errors:0 dropped:0 overruns:0 frame:0
TX packets:10 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:128882 (128.8 KB) TX bytes:828 (828.0 B)
root@nbs-dh-10:~#
</code></pre>
<p style="margin: 0px 0px 1.2em ! important;">Any debugging
suggestions?</p>
<p style="margin: 0px 0px 1.2em ! important;">Thanks,<br>
D</p>
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