apport information
** Attachment added: "acpidump.txt"
https://bugs.launchpad.net/bugs/1902960/+attachment/5431253/+files/acpidump.txt
** Description changed:
The systemd upgrade 245.4-4ubuntu3.3 to 245.4-4ubuntu3.2 appears to have
broken DNS resolution across much of our Azure fleet earlier today. We
ended up mitigating this by forcing reboots on the associated instances,
no combination of networkctl reload, reconfigure, systemctl daemon-
reexec, systemctl daemon-reload, netplan generate, netplan apply would
get resolvectl to have a DNS server again. The main symptom appears to
have been systemd-networkd believing it wasn't managing the eth0
interfaces:
-
- ubuntu@machine-1:~$ sudo networkctl
- IDX LINK TYPE OPERATIONAL SETUP
- 1 lo loopback carrier unmanaged
- 2 eth0 ether routable unmanaged
-
2 links listed.
+ ubuntu@machine-1:~$ sudo networkctl
+ IDX LINK TYPE OPERATIONAL SETUP
+ 1 lo loopback carrier unmanaged
+ 2 eth0 ether routable unmanaged
+ 2
links listed.
Which eventually made them lose their DNS resolvers:
ubuntu@machine-1:~$ sudo resolvectl dns
Global:
Link 2 (eth0):
After rebooting, we see this behaving properly:
ubuntu@machine-1:~$ sudo networkctl list
- IDX LINK TYPE OPERATIONAL SETUP
- 1 lo loopback carrier unmanaged
- 2 eth0 ether routable configured
+ IDX LINK TYPE OPERATIONAL SETUP
+ 1 lo loopback carrier unmanaged
+ 2 eth0 ether routable configured
2 links listed.
ubuntu@machine-1:~$ sudo resolvectl dns
Global:
Link 2 (eth0): 168.63.129.16
-
This appears to be specifically linked to the upgrade, i.e. we were able to
provoke the issue by upgrading the systemd package, so I suspect it's part of
the packaging in the upgrade process.
- ---
+ ---
ProblemType: Bug
ApportVersion: 2.20.11-0ubuntu27.10
Architecture: amd64
CasperMD5CheckResult: skip
DistroRelease: Ubuntu 20.04
Lspci-vt:
- -[0000:00]-+-00.0 Intel Corporation 440BX/ZX/DX - 82443BX/ZX/DX Host bridge
(AGP disabled)
- +-07.0 Intel Corporation 82371AB/EB/MB PIIX4 ISA
- +-07.1 Intel Corporation 82371AB/EB/MB PIIX4 IDE
- +-07.3 Intel Corporation 82371AB/EB/MB PIIX4 ACPI
- \-08.0 Microsoft Corporation Hyper-V virtual VGA
+ -[0000:00]-+-00.0 Intel Corporation 440BX/ZX/DX - 82443BX/ZX/DX Host bridge
(AGP disabled)
+ +-07.0 Intel Corporation 82371AB/EB/MB PIIX4 ISA
+ +-07.1 Intel Corporation 82371AB/EB/MB PIIX4 IDE
+ +-07.3 Intel Corporation 82371AB/EB/MB PIIX4 ACPI
+ \-08.0 Microsoft Corporation Hyper-V virtual VGA
Lsusb: Error: command ['lsusb'] failed with exit code 1:
Lsusb-t:
-
+
Lsusb-v: Error: command ['lsusb', '-v'] failed with exit code 1:
MachineType: Microsoft Corporation Virtual Machine
Package: systemd 245.4-4ubuntu3.3
PackageArchitecture: amd64
ProcEnviron:
- TERM=xterm-256color
- PATH=(custom, no user)
- LANG=C.UTF-8
- SHELL=/bin/bash
+ TERM=xterm-256color
+ PATH=(custom, no user)
+ LANG=C.UTF-8
+ SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.4.0-1031-azure
root=PARTUUID=2e08bba3-68b4-4a16-af3b-47b73bd138a9 ro console=tty1
console=ttyS0 earlyprintk=ttyS0 panic=-1
ProcVersionSignature: Ubuntu 5.4.0-1031.32-azure 5.4.65
Tags: focal uec-images
Uname: Linux 5.4.0-1031-azure x86_64
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: N/A
_MarkForUpload: True
dmi.bios.date: 12/07/2018
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 090008
dmi.board.name: Virtual Machine
dmi.board.vendor: Microsoft Corporation
dmi.board.version: 7.0
dmi.chassis.asset.tag: 7783-7084-3265-9085-8269-3286-77
dmi.chassis.type: 3
dmi.chassis.vendor: Microsoft Corporation
dmi.chassis.version: 7.0
dmi.modalias:
dmi:bvnAmericanMegatrendsInc.:bvr090008:bd12/07/2018:svnMicrosoftCorporation:pnVirtualMachine:pvr7.0:rvnMicrosoftCorporation:rnVirtualMachine:rvr7.0:cvnMicrosoftCorporation:ct3:cvr7.0:
dmi.product.name: Virtual Machine
dmi.product.uuid: 4412ad79-83fa-f845-b7c2-6f30dd4f1950
dmi.product.version: 7.0
dmi.sys.vendor: Microsoft Corporation
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https://bugs.launchpad.net/bugs/1902960
Title:
Upgrade from 245.4-4ubuntu3.3 to 245.4-4ubuntu3.2 appears to break DNS
resolution in some cases
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