LXC lose sometimes network connection

[sinowine]

Hello,

I have a problem with my three LXC machines. They lose sometimes the network connection and need a "systemctl restart networking.service" or reboot to work again. All LXC are configured as DHCP with fritzbox as DHCP-Server. All the IPs are fixed in fritzbox web-ui. I use bridged network vmbr0 for all the LXCs.

Can someone help me and can me explain, why only the LXCs lose sometimes the network connection? Should I configure the fritzbox fixed IPs for the LXCs as static IPs in proxmox?

root@Awtrix:~# systemctl status networking.service
* networking.service - Raise network interfaces
   Loaded: loaded (/lib/systemd/system/networking.service; enabled; vendor preset: ena
   Active: failed (Result: timeout) since Mon 2020-04-20 11:25:50 CEST; 6min ago
     Docs: man:interfaces(5)
  Process: 410 ExecStart=/sbin/ifup -a --read-environment (code=exited, status=1/FAILU
 Main PID: 410 (code=exited, status=1/FAILURE)
    Tasks: 0 (limit: 4915)
   Memory: 7.3M
   CGroup: /system.slice/networking.service

Apr 20 11:25:50 Awtrix dhclient[484]: RCV: Advertise message on eth0 from fe80::464e:6
Apr 20 11:25:50 Awtrix ifup[410]: RCV: Advertise message on eth0 from fe80::464e:6dff:
Apr 20 11:25:50 Awtrix ifup[410]: RCV:  X-- Server ID: 00:03:00:01:44:4e:6d:33:ef:96
Apr 20 11:25:50 Awtrix ifup[410]: PRC: Lease failed to satisfy.
Apr 20 11:25:50 Awtrix systemd[1]: networking.service: Start operation timed out. Term
Apr 20 11:25:50 Awtrix ifup[410]: Got signal Terminated, terminating...
Apr 20 11:25:50 Awtrix ifup[410]: ifup: failed to bring up eth0
Apr 20 11:25:50 Awtrix systemd[1]: networking.service: Main process exited, code=exite
Apr 20 11:25:50 Awtrix systemd[1]: networking.service: Failed with result 'timeout'.
Apr 20 11:25:50 Awtrix systemd[1]: Failed to start Raise network interfaces.
lines 1-20/20 (END)
root@Awtrix:~# cat /etc/network/interfaces
auto lo
iface lo inet loopback

auto eth0
iface eth0 inet dhcp

iface eth0 inet6 dhcp

root@Awtrix:~# journalctl -u networking.service
-- Logs begin at Mon 2020-04-20 11:02:51 CEST, end at Mon 2020-04-20 11:25:50 CEST. --
Apr 20 11:02:51 Awtrix systemd[1]: Starting Raise network interfaces...
Apr 20 11:02:51 Awtrix dhclient[78]: Internet Systems Consortium DHCP Client 4.4.1
Apr 20 11:02:51 Awtrix dhclient[78]: Copyright 2004-2018 Internet Systems Consortium.
Apr 20 11:02:51 Awtrix ifup[61]: Internet Systems Consortium DHCP Client 4.4.1
Apr 20 11:02:51 Awtrix ifup[61]: Copyright 2004-2018 Internet Systems Consortium.
Apr 20 11:02:51 Awtrix ifup[61]: All rights reserved.
Apr 20 11:02:51 Awtrix ifup[61]: For info, please visit https://www.isc.org/software/d
Apr 20 11:02:51 Awtrix dhclient[78]: All rights reserved.
Apr 20 11:02:51 Awtrix dhclient[78]: For info, please visit https://www.isc.org/softwa
Apr 20 11:02:51 Awtrix dhclient[78]: 
Apr 20 11:02:51 Awtrix dhclient[78]: Listening on LPF/eth0/7a:ae:8a:40:4e:61
Apr 20 11:02:51 Awtrix dhclient[78]: Sending on   LPF/eth0/7a:ae:8a:40:4e:61
Apr 20 11:02:51 Awtrix ifup[61]: Listening on LPF/eth0/7a:ae:8a:40:4e:61
Apr 20 11:02:51 Awtrix ifup[61]: Sending on   LPF/eth0/7a:ae:8a:40:4e:61
Apr 20 11:02:51 Awtrix ifup[61]: Sending on   Socket/fallback
Apr 20 11:02:51 Awtrix ifup[61]: DHCPREQUEST for 192.168.178.45 on eth0 to 255.255.255
Apr 20 11:02:51 Awtrix dhclient[78]: Sending on   Socket/fallback
Apr 20 11:02:51 Awtrix dhclient[78]: DHCPREQUEST for 192.168.178.45 on eth0 to 255.255
Apr 20 11:02:51 Awtrix dhclient[78]: DHCPACK of 192.168.178.45 from 192.168.178.1
Apr 20 11:02:51 Awtrix ifup[61]: DHCPACK of 192.168.178.45 from 192.168.178.1
Apr 20 11:02:51 Awtrix dhclient[78]: bound to 192.168.178.45 -- renewal in 353791 seco
Apr 20 11:02:51 Awtrix ifup[61]: bound to 192.168.178.45 -- renewal in 353791 seconds.
lines 1-23

 

[wolfgang]

Hi,

I guess the DHCP lease is not renewed any more.
I would set the IP in a static way.