[Bug 1890903] Re: systemd-resolved.service still breaks (now 20.04, since as least 16)

[Launchpad Bug Tracker]

[Expired for systemd (Ubuntu) because there has been no activity for 60
days.]

** Changed in: systemd (Ubuntu)
       Status: Incomplete => Expired

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Title:
  systemd-resolved.service still breaks (now 20.04, since as least 16)

Status in systemd package in Ubuntu:
  Expired

Bug description:
  There are still occurrences of this service breaking down.

  At some moment the service just stops working correctly and is not
  able to recover.

  I can reset the service by restarting it:
     systemctl restart systemd-resolved.service

  I've also tried to set the caching off, but it still fails on me
  occasionally (on 18.04 as well).

  There is a local DNS in the network, I would like to directly use that in stead of:
     nameserver 127.0.0.53

  
  Example:
  geus at desk-02:~$ ssh smb-01
  ssh: Could not resolve hostname smb-01: Temporary failure in name resolution
  ...
  root at desk-02:/home/geus# systemctl restart systemd-resolved.service
  root at desk-02:/home/geus# nslookup smb-01
  Server:		127.0.0.53
  Address:	127.0.0.53#53

  Non-authoritative answer:
  Name:	smb-01.lan
  Address: 192.168.178.39
  ...
  geus at desk-02:~$ ssh smb-01
  geus at smb-01's password:

  ProblemType: Bug
  DistroRelease: Ubuntu 20.04
  Package: systemd 245.4-4ubuntu3.2
  ProcVersionSignature: Ubuntu 5.4.0-42.46-generic 5.4.44
  Uname: Linux 5.4.0-42-generic x86_64
  ApportVersion: 2.20.11-0ubuntu27.6
  Architecture: amd64
  CasperMD5CheckResult: skip
  CurrentDesktop: GNOME
  Date: Sat Aug  8 17:03:50 2020
  InstallationDate: Installed on 2020-05-31 (69 days ago)
  InstallationMedia: Ubuntu 20.04 LTS "Focal Fossa" - Release amd64 (20200423)
  Lsusb:
   Bus 001 Device 002: ID 0627:0001 Adomax Technology Co., Ltd QEMU USB Tablet
   Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
   Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
   Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
   Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
  Lsusb-t:
   /:  Bus 04.Port 1: Dev 1, Class=root_hub, Driver=uhci_hcd/2p, 12M
   /:  Bus 03.Port 1: Dev 1, Class=root_hub, Driver=uhci_hcd/2p, 12M
   /:  Bus 02.Port 1: Dev 1, Class=root_hub, Driver=uhci_hcd/2p, 12M
   /:  Bus 01.Port 1: Dev 1, Class=root_hub, Driver=ehci-pci/6p, 480M
       |__ Port 1: Dev 2, If 0, Class=Human Interface Device, Driver=usbhid, 480M
  MachineType: QEMU Standard PC (i440FX + PIIX, 1996)
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.4.0-42-generic root=/dev/mapper/vgubuntu-root ro quiet splash vt.handoff=7
  SourcePackage: systemd
  SystemdDelta:
   [EXTENDED]   /usr/lib/systemd/system/rc-local.service → /usr/lib/systemd/system/rc-local.service.d/debian.conf
   [EXTENDED]   /usr/lib/systemd/system/user at .service → /usr/lib/systemd/system/user at .service.d/timeout.conf
   
   2 overridden configuration files found.
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 04/01/2014
  dmi.bios.vendor: SeaBIOS
  dmi.bios.version: 1.10.2-1ubuntu1
  dmi.chassis.type: 1
  dmi.chassis.vendor: QEMU
  dmi.chassis.version: pc-i440fx-bionic
  dmi.modalias: dmi:bvnSeaBIOS:bvr1.10.2-1ubuntu1:bd04/01/2014:svnQEMU:pnStandardPC(i440FX+PIIX,1996):pvrpc-i440fx-bionic:cvnQEMU:ct1:cvrpc-i440fx-bionic:
  dmi.product.name: Standard PC (i440FX + PIIX, 1996)
  dmi.product.version: pc-i440fx-bionic
  dmi.sys.vendor: QEMU

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