Public bug reported:
I have four 18.04 servers that are regularly updated and have a
bond/bridge configured via netplan. Every so often the interfaces
themselves will have "speed changed to 0" and the server will be
unresponsive over network. The servers are still usable via the console,
though. I think I can confidently associate it with systemd updates. If
I'm manually updating the servers, e.g., `apt dist-upgrade`, and there's
a system update... the ssh session becomes unresponsive when updating
systemd, timing of automatic security updates seems to coincide with it
happening as well. Rebooting fixes the issue until the next systemd
update. I've included some log excerpts and one of my netplan configs
below. Thanks!
syslog:
`Apr 9 06:39:01 stn-vm-host dnsmasq[2557]: using nameserver 127.0.0.53#53
Apr 9 06:39:01 stn-vm-host systemd-networkd[13409]: enp4s0f3: Lost carrier
Apr 9 06:39:01 stn-vm-host systemd-networkd[13409]: enp4s0f3: IPv6 successfully
disabled
Apr 9 06:39:01 stn-vm-host dnsmasq[2557]: reading /etc/resolv.conf
Apr 9 06:39:01 stn-vm-host dnsmasq[2557]: using nameserver 127.0.0.53#53
Apr 9 06:39:01 stn-vm-host kernel: [1058497.661292] igb 0000:04:00.3 enp4s0f3:
speed changed to 0 for port enp4s0f3
Apr 9 06:39:01 stn-vm-host systemd-networkd[13409]: enp4s0f2: Lost carrier
Apr 9 06:39:01 stn-vm-host systemd-networkd[13409]: enp4s0f2: IPv6 successfully
disabled
Apr 9 06:39:01 stn-vm-host dnsmasq[2557]: reading /etc/resolv.conf
Apr 9 06:39:01 stn-vm-host systemd[1]: Started Network Time Synchronization.
Apr 9 06:39:01 stn-vm-host systemd[1]: Stopped Flush Journal to Persistent
Storage.
Apr 9 06:39:01 stn-vm-host systemd[1]: Stopping Flush Journal to Persistent
Storage...
Apr 9 06:39:01 stn-vm-host kernel: [1058497.732487] systemd[1]: Stopping
Journal Service...
Apr 9 06:39:01 stn-vm-host kernel: [1058497.732903] systemd-journald[672]:
Received SIGTERM from PID 1 (systemd).
Apr 9 06:39:01 stn-vm-host kernel: [1058497.823634] igb 0000:04:00.2 enp4s0f2:
speed changed to 0 for port enp4s0f2
Apr 9 06:39:01 stn-vm-host kernel: [1058497.833718] systemd[1]: Stopped Journal
Service.
Apr 9 06:39:01 stn-vm-host kernel: [1058497.837652] systemd[1]: Starting
Journal Service...
Apr 9 06:39:01 stn-vm-host systemd-networkd[13409]: enp4s0f1: Lost carrier
Apr 9 06:39:01 stn-vm-host dnsmasq[2557]: using nameserver 127.0.0.53#53
Apr 9 06:39:01 stn-vm-host systemd-networkd[13409]: enp4s0f1: IPv6 successfully
disabled
Apr 9 06:39:01 stn-vm-host dnsmasq[2557]: reading /etc/resolv.conf
Apr 9 06:39:01 stn-vm-host dnsmasq[2557]: using nameserver 127.0.0.53#53
Apr 9 06:39:01 stn-vm-host dnsmasq[2557]: reading /etc/resolv.conf
Apr 9 06:39:01 stn-vm-host systemd[1]: Starting Flush Journal to Persistent
Storage...
Apr 9 06:39:01 stn-vm-host kernel: [1058497.912976] systemd[1]: Started Journal
Service.
Apr 9 06:39:01 stn-vm-host systemd[1]: Started Flush Journal to Persistent
Storage.
Apr 9 06:39:01 stn-vm-host dnsmasq[2557]: using nameserver 127.0.0.53#53
Apr 9 06:39:01 stn-vm-host kernel: [1058497.971223] igb 0000:04:00.1 enp4s0f1:
speed changed to 0 for port enp4s0f1
Apr 9 06:39:01 stn-vm-host systemd-networkd[13409]: enp4s0f0: Lost carrier
Apr 9 06:39:01 stn-vm-host systemd-networkd[13409]: enp4s0f0: IPv6 successfully
disabled
Apr 9 06:39:01 stn-vm-host dnsmasq[2557]: reading /etc/resolv.conf
Apr 9 06:39:01 stn-vm-host dnsmasq[2557]: using nameserver 127.0.0.53#53
Apr 9 06:39:01 stn-vm-host kernel: [1058498.109063] igb 0000:04:00.0 enp4s0f0:
speed changed to 0 for port enp4s0f0
Apr 9 06:39:01 stn-vm-host systemd-networkd[13409]: bond0: Gained carrier
Apr 9 06:39:01 stn-vm-host systemd-networkd[13409]: bond0: Configured
Apr 9 06:39:01 stn-vm-host systemd-networkd[13409]: br0: Configured`
Apt history, noting the systemd update just before the interfaces when down
`Start-Date: 2019-04-09 06:38:55
Commandline: /usr/bin/unattended-upgrade
Upgrade: libsystemd0:amd64 (237-3ubuntu10.15, 237-3ubuntu10.19),
libpam-systemd:amd64 (237-3ubuntu10.15, 237-3ubuntu10.19), systemd:amd64
(237-3ubuntu10.15, 237-3ubuntu10.19), libnss-systemd:amd64 (237-3ubuntu10.15,
237-3ubuntu10.19)
End-Date: 2019-04-09 06:39:06`
The netplan config on this server:
`network:
ethernets:
enp4s0f0:
addresses: []
dhcp4: false
dhcp6: false
enp4s0f1:
addresses: []
dhcp4: false
dhcp6: false
enp4s0f2:
addresses: []
dhcp4: false
dhcp6: false
enp4s0f3:
addresses: []
dhcp4: false
dhcp6: false
bonds:
bond0:
dhcp4: false
dhcp6: false
interfaces:
- enp4s0f0
- enp4s0f1
- enp4s0f2
- enp4s0f3
parameters:
lacp-rate: slow
mode: 802.3ad
transmit-hash-policy: layer2
bridges:
br0:
interfaces: [bond0]
dhcp4: no
dhcp6: no
addresses: [10.0.0.1/16]
gateway4: 10.0.0.10
nameservers:
addresses: [10.0.0.10,8.8.8.8]
search:
- lan
version: 2`
** Affects: systemd (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1824806
Title:
Network stops working after systemd update
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