Despite my comment above, I still have this problem when using netplan.
Here is my /etc/netplan/config.yaml (external IP quatrains have been
changed), the setup is that enp8s1 provides internet access (with metric
49) and enp7s0 provides local lan access *and* (with metric 51) fallback
internet access:
network:
version: 2
renderer: networkd
ethernets:
enp8s1:
dhcp4: false
wakeonlan: true
addresses: [111.94.100.80/24]
nameservers:
addresses: [111.94.100.1]
# makes this the default route - deprecated
#gateway4: 111.94.100.1
link-local: []
routes:
- to: default
via: 111.94.100.1
metric: 49
on-link: true
enp7s0:
dhcp4: false
wakeonlan: true
addresses: [192.168.20.88/24]
nameservers:
addresses: [192.168.20.1]
link-local: []
routes:
- to: default
via: 192.168.20.1
metric: 51
on-link: true
# to avoid conflict with enp8s1 default route, but makes no difference
#table: 76
- to: 192.168.20.0/24
via: 192.168.20.1
metric: 48
When working properly:
# ip route show to default
default via 111.94.100.1 dev enp8s1 proto static metric 49 onlink
default via 192.168.20.1 dev enp7s0 proto static metric 51 onlink
But after systemd reconfiguration we have two default routes with a
metric of 0! We have to delete one of them to restore the correct setup
(as above) and get internet access via enp8s1 again. My workaround is
continuous monitoring of syslog for a line indicating that the network
has been (re)configured by systemd and then running some bash code like
this (extract):
if [[ -n $(ip route show to default metric 0 via 192.168.20.1) ]]; then
NUM_DEFAULT_ROUTES=$(ip route show to default|wc -l)
if [[ $NUM_DEFAULT_ROUTES -gt 2 ]]; then
ip route delete to default metric 0 via 192.168.20.1
fi
fi
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You received this bug notification because you are a member of Ubuntu
Touch seeded packages, which is subscribed to systemd in Ubuntu.
https://bugs.launchpad.net/bugs/1782709
Title:
Updating systemd kills network on bionic
Status in linux package in Ubuntu:
Expired
Status in systemd package in Ubuntu:
Invalid
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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