Can confirm the same behaviour on my systems too. Updating systemd
recently caused the entire routing table to be dropped (I had console
access and was able to confirm no routes - not even loopback worked). In
normal operation I see:
>ip route show
default via 10.0.0.1 dev eno1 src 10.0.0.60 metric 202
10.0.0.0/24 dev eno1 proto dhcp scope link src 10.0.0.60 metric 202
However, when systemd is updated, the route table is blank although
interfaces maintain their addresses etc. When working remotely, I need
to get remote hands to reboot the system to restore normal functionality
which obviously extends down time. We have implemented procedures to
watch the route table and if it disappears, triggers a reboot but this
is problematic as it could happen before the update process is finished.
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https://bugs.launchpad.net/bugs/1782709
Title:
Updating systemd kills network on bionic
Status in linux package in Ubuntu:
Incomplete
Status in systemd package in Ubuntu:
Confirmed
Bug description:
I do have an ubuntu bionic server installation without a graphical interface.
The server
has two active network adapters, both connected to the internet. One is used
for outgoing
internet traffic, the other for incoming. The incoming adapter lives on a
public network segment
(something like 88.236.133.104/29). I do have multiple servers within this
segment.
Typically, I update the server regularly, meaning:
* ssh to the incoming adapter: ssh 88.236.133.108
* apt-get update
* apt-get upgrade
* apt-get dist-upgrade
* apt-get clean
* reboot
It used to work ok.
BUT: Today, "apt-get upgrade" seem to take really long when updating systemd.
After a could of minutes, I realized that the ssh session became inactive. I
couldn't type
into it, I had to abort it via ~. .
* ssh from the internet to the incoming adapter was not working anymore - ssh
88.236.133.108
* ssh via another server within the public network segment worked
* ssh 88.236.133.106 -> ssh 88.236.133.108
* After running "netplan apply" everything was fine again
Here my netplan configuration (I changed the ip addresses):
network:
version: 2
renderer: networkd
ethernets:
eno1:
dhcp4: yes
eno2:
dhcp4: no
addresses: [88.236.133.108/29]
#gateway4: 88.236.133.105
routes:
- to: 0.0.0.0/0
via: 88.236.133.105
table: 120
routing-policy:
- from: 88.236.133.108/32
table: 120
- to: 88.236.133.108/32
table: 120
Unfortunately, I don't have the console output avalable anymore.
Shall I provide additional info?
Best regards, Uli
---
ProblemType: Bug
AlsaDevices:
total 0
crw-rw---- 1 root audio 116, 1 Jul 20 08:10 seq
crw-rw---- 1 root audio 116, 33 Jul 20 08:10 timer
AplayDevices: Error: [Errno 2] No such file or directory: 'aplay': 'aplay'
ApportVersion: 2.20.9-0ubuntu7.2
Architecture: amd64
ArecordDevices: Error: [Errno 2] No such file or directory: 'arecord':
'arecord'
AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/seq',
'/dev/snd/timer'] failed with exit code 1:
DistroRelease: Ubuntu 18.04
InstallationDate: Installed on 2018-07-14 (5 days ago)
InstallationMedia: Ubuntu-Server 18.04 LTS "Bionic Beaver" - Release amd64
(20180426)
IwConfig: Error: [Errno 2] No such file or directory: 'iwconfig': 'iwconfig'
MachineType: IBM IBM System x -[794582G]-
Package: linux (not installed)
PciMultimedia:
ProcEnviron:
TERM=xterm
PATH=(custom, no user)
XDG_RUNTIME_DIR=<set>
LANG=de_DE.UTF-8
SHELL=/bin/bash
ProcFB: 0 mgadrmfb
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.15.0-23-generic
root=UUID=a41b3020-8359-4fe2-8fc3-1c97011f71ec ro
ProcVersionSignature: Ubuntu 4.15.0-23.25-generic 4.15.18
RelatedPackageVersions:
linux-restricted-modules-4.15.0-23-generic N/A
linux-backports-modules-4.15.0-23-generic N/A
linux-firmware 1.173.1
RfKill: Error: [Errno 2] No such file or directory: 'rfkill': 'rfkill'
Tags: bionic
Uname: Linux 4.15.0-23-generic x86_64
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups:
_MarkForUpload: True
dmi.bios.date: 05/07/2014
dmi.bios.vendor: IBM Corp.
dmi.bios.version: -[D6E162AUS-1.20]-
dmi.board.asset.tag: (none)
dmi.board.name: 00D4062
dmi.board.vendor: IBM
dmi.board.version: (none)
dmi.chassis.asset.tag: none
dmi.chassis.type: 23
dmi.chassis.vendor: IBM
dmi.chassis.version: none
dmi.modalias:
dmi:bvnIBMCorp.:bvr-[D6E162AUS-1.20]-:bd05/07/2014:svnIBM:pnIBMSystemx-[794582G]-:pvr00:rvnIBM:rn00D4062:rvr(none):cvnIBM:ct23:cvrnone:
dmi.product.family: System x
dmi.product.name: IBM System x -[794582G]-
dmi.product.version: 00
dmi.sys.vendor: IBM
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