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List: lxc-users
Subject: [lxc-users] LXD: network connectivity dies when doing lxc stop / lxc start
From: Tomasz Chmielewski <mangoo () wpkg ! org>
Date: 2016-10-28 11:41:53
Message-ID: 6884ad1b17aee864e12e88cc2cb99f9c () admin ! virtall ! com
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Here is a weird one, and most likely not LXD fault, but some issue with
bridged networking.
I'm using bridge networking for all container. The problem is that if I
stop and start one container, some other containers loose connectivity.
They loose connectivity for 10, 20 secs, sometimes up to a minute.
For example:
# ping 8.8.8.8
(...)
64 bytes from 8.8.8.8: icmp_seq ttlH time.0 ms
64 bytes from 8.8.8.8: icmp_seq ttlH time.0 ms
64 bytes from 8.8.8.8: icmp_seq ttlH time.1 ms
64 bytes from 8.8.8.8: icmp_seq ttlH time.0 ms
64 bytes from 8.8.8.8: icmp_seq ttlH time.0 ms
...another container stopped/started...
...40 seconds of broken connectivity...
64 bytes from 8.8.8.8: icmp_seq` ttlH time.1 ms
64 bytes from 8.8.8.8: icmp_seqa ttlH time.1 ms
64 bytes from 8.8.8.8: icmp_seqb ttlH time.1 ms
64 bytes from 8.8.8.8: icmp_seqc ttlH time.0 ms
Pinging the gateway dies in a similar way.
The networking is as follows:
containers - eth0, private addressing (192.168.0.x)
host - "ctbr0" - private address (192.168.0.1), plus NAT into the world
auto ctbr0
iface ctbr0 inet static
address 192.168.0.1
netmask 255.255.255.0
bridge_ports none
bridge_stp off
bridge_fd 0
The only workaround seems to be arpinging the gateway from the container
all the time, for example:
# arping 192.168.0.1
This way, the container doesn't loose connectivity when other containers
are stopped/started.
But of course I don't like this kind of fix.
Is anyone else seeing this too? Any better workaround that constant
arping from all affected containers?
Tomasz Chmielewski
https://lxadm.com
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