On Mon, Mar 30, 2020 at 09:09:56PM -0000, Simon Déziel wrote:
> On 2020-03-30 4:54 p.m., Seth Arnold wrote:
> > Sadly 'journactl -xe' was useless. (It only showed a thousand
> > unrelated lines.) A raw journalctl took forever to run long enough to
> > let me see it generated two million lines of output, and started about
> > two years ago, that I'm not keen on trying to run that through less or
> > similar. Advice accepted.
> 
> This should let you see today's logs related to $UNIT_NAME:
> 
>   journalctl -S today -u $UNIT_NAME

Thanks Simon, that's really useful:

$ journalctl -S yesterday -u libvirt*
-- Logs begin at Mon 2020-02-10 21:23:01 UTC, end at Tue 2020-03-31 01:27:06 
UTC. --
Mar 30 17:58:04 millbarge dnsmasq[3054]: reading /etc/resolv.conf
Mar 30 17:58:04 millbarge dnsmasq[3054]: using nameserver 127.0.0.53#53
Mar 30 17:58:04 millbarge dnsmasq[3054]: reading /etc/resolv.conf
Mar 30 17:58:04 millbarge dnsmasq[3054]: using nameserver 127.0.0.53#53
Mar 30 17:58:04 millbarge dnsmasq[3054]: reading /etc/resolv.conf
Mar 30 17:58:04 millbarge dnsmasq[3054]: using nameserver 127.0.0.53#53
Mar 30 17:58:04 millbarge dnsmasq[3054]: reading /etc/resolv.conf
Mar 30 17:58:04 millbarge dnsmasq[3054]: using nameserver 127.0.0.53#53
Mar 30 17:58:04 millbarge dnsmasq[3054]: reading /etc/resolv.conf
Mar 30 17:58:04 millbarge dnsmasq[3054]: using nameserver 127.0.0.53#53
Mar 30 17:58:04 millbarge dnsmasq[3054]: reading /etc/resolv.conf
Mar 30 17:58:04 millbarge dnsmasq[3054]: using nameserver 127.0.0.53#53
Mar 30 17:58:04 millbarge dnsmasq[3054]: reading /etc/resolv.conf
Mar 30 17:58:04 millbarge dnsmasq[3054]: using nameserver 127.0.0.53#53
Mar 30 17:58:04 millbarge dnsmasq[3054]: reading /etc/resolv.conf
Mar 30 17:58:04 millbarge dnsmasq[3054]: using nameserver 127.0.0.53#53
Mar 30 17:58:04 millbarge dnsmasq[3054]: reading /etc/resolv.conf
Mar 30 17:58:04 millbarge dnsmasq[3054]: using nameserver 127.0.0.53#53
Mar 30 17:58:04 millbarge dnsmasq[3054]: reading /etc/resolv.conf
Mar 30 17:58:04 millbarge dnsmasq[3054]: using nameserver 127.0.0.53#53
Mar 30 17:58:04 millbarge dnsmasq[3054]: reading /etc/resolv.conf
Mar 30 17:58:04 millbarge dnsmasq[3054]: using nameserver 127.0.0.53#53
Mar 30 17:58:04 millbarge dnsmasq[3054]: reading /etc/resolv.conf
Mar 30 17:58:04 millbarge dnsmasq[3054]: using nameserver 127.0.0.53#53
Mar 30 17:58:04 millbarge dnsmasq[3054]: reading /etc/resolv.conf
Mar 30 17:58:04 millbarge dnsmasq[3054]: using nameserver 127.0.0.53#53
Mar 30 20:44:31 millbarge dnsmasq[3054]: reading /etc/resolv.conf
Mar 30 20:44:31 millbarge dnsmasq[3054]: using nameserver 127.0.0.53#53
Mar 30 20:44:55 millbarge systemd[1]: libvirtd-ro.socket: Succeeded.
Mar 30 20:44:55 millbarge systemd[1]: Closed Libvirt local read-only socket.
Mar 30 20:44:55 millbarge systemd[1]: Stopping Libvirt local read-only socket.
Mar 30 20:44:55 millbarge systemd[1]: libvirtd-ro.socket: Socket service 
libvirtd.service already active, refusing.
Mar 30 20:44:55 millbarge systemd[1]: Failed to listen on Libvirt local 
read-only socket.
Mar 30 20:44:55 millbarge systemd[1]: Stopping Virtualization daemon...
Mar 30 20:44:55 millbarge systemd[1]: libvirtd.service: Succeeded.
Mar 30 20:44:55 millbarge systemd[1]: Stopped Virtualization daemon.
Mar 30 20:44:55 millbarge systemd[1]: libvirtd-admin.socket: Succeeded.
Mar 30 20:44:55 millbarge systemd[1]: Closed Libvirt admin socket.
Mar 30 20:44:55 millbarge systemd[1]: Stopping Libvirt admin socket.
Mar 30 20:44:55 millbarge systemd[1]: libvirtd.socket: Succeeded.
Mar 30 20:44:55 millbarge systemd[1]: Closed Libvirt local socket.
Mar 30 20:44:55 millbarge systemd[1]: Stopping Libvirt local socket.
Mar 30 20:44:55 millbarge systemd[1]: Listening on Libvirt local socket.
Mar 30 20:44:55 millbarge systemd[1]: Listening on Libvirt admin socket.
Mar 30 20:44:55 millbarge systemd[1]: Listening on Libvirt local read-only 
socket.
Mar 30 20:44:55 millbarge systemd[1]: libvirtd.service: Found left-over process 
3054 (dnsmasq) in control group while starting unit. Ignoring.
Mar 30 20:44:55 millbarge systemd[1]: This usually indicates unclean 
termination of a previous run, or service implementation deficiencies.
Mar 30 20:44:55 millbarge systemd[1]: libvirtd.service: Found left-over process 
3055 (dnsmasq) in control group while starting unit. Ignoring.
Mar 30 20:44:55 millbarge systemd[1]: This usually indicates unclean 
termination of a previous run, or service implementation deficiencies.
Mar 30 20:44:55 millbarge systemd[1]: Starting Virtualization daemon...
Mar 30 20:44:55 millbarge systemd[1]: Started Virtualization daemon.
Mar 30 20:44:55 millbarge dnsmasq[3054]: read /etc/hosts - 7 addresses
Mar 30 20:44:55 millbarge dnsmasq[3054]: read 
/var/lib/libvirt/dnsmasq/default.addnhosts - 0 addresses
Mar 30 20:44:55 millbarge dnsmasq-dhcp[3054]: read 
/var/lib/libvirt/dnsmasq/default.hostsfile
Mar 31 00:02:58 millbarge systemd[1]: Stopping Suspend/Resume Running libvirt 
Guests...
Mar 31 00:02:58 millbarge libvirt-guests.sh[3865897]: Running guests on default 
URI:
Mar 31 00:02:58 millbarge libvirt-guests.sh[3865910]: Running guests on
Mar 31 00:02:58 millbarge libvirt-guests.sh[3865859]: R
Mar 31 00:02:58 millbarge systemd[1]: libvirt-guests.service: Succeeded.
Mar 31 00:02:58 millbarge systemd[1]: Stopped Suspend/Resume Running libvirt 
Guests.
Mar 31 00:02:58 millbarge systemd[1]: Stopping Virtualization daemon...
Mar 31 00:02:58 millbarge systemd[1]: libvirtd.service: Succeeded.
Mar 31 00:02:58 millbarge systemd[1]: Stopped Virtualization daemon.
Mar 31 00:03:00 millbarge systemd[1]: libvirtd-admin.socket: Succeeded.
Mar 31 00:03:00 millbarge systemd[1]: Closed Libvirt admin socket.
Mar 31 00:03:00 millbarge systemd[1]: libvirtd-ro.socket: Succeeded.
Mar 31 00:03:00 millbarge systemd[1]: Closed Libvirt local read-only socket.
Mar 31 00:03:00 millbarge systemd[1]: libvirtd.socket: Succeeded.
Mar 31 00:03:00 millbarge systemd[1]: Closed Libvirt local socket.
-- Reboot --
Mar 31 00:04:08 millbarge systemd[1]: Listening on Libvirt local socket.
Mar 31 00:04:08 millbarge systemd[1]: Listening on Libvirt admin socket.
Mar 31 00:04:08 millbarge systemd[1]: Listening on Libvirt local read-only 
socket.
Mar 31 00:04:12 millbarge systemd[1]: Starting Virtualization daemon...
Mar 31 00:04:12 millbarge systemd[1]: Started Virtualization daemon.
Mar 31 00:04:12 millbarge systemd[1]: Starting Suspend/Resume Running libvirt 
Guests...
Mar 31 00:04:12 millbarge systemd[1]: Finished Suspend/Resume Running libvirt 
Guests.
Mar 31 00:04:13 millbarge dnsmasq[3011]: started, version 2.80 cachesize 150
Mar 31 00:04:13 millbarge dnsmasq[3011]: compile time options: IPv6 GNU-getopt 
DBus i18n IDN DHCP DHCPv6 no-Lua TFTP conntrack ipset auth DNSSEC loop-detect 
inotify dumpfile
Mar 31 00:04:13 millbarge dnsmasq-dhcp[3011]: DHCP, IP range 192.168.122.2 -- 
192.168.122.254, lease time 1h
Mar 31 00:04:13 millbarge dnsmasq-dhcp[3011]: DHCP, sockets bound exclusively 
to interface virbr0
Mar 31 00:04:13 millbarge dnsmasq[3011]: reading /etc/resolv.conf
Mar 31 00:04:13 millbarge dnsmasq[3011]: using nameserver 127.0.0.53#53
Mar 31 00:04:13 millbarge dnsmasq[3011]: read /etc/hosts - 7 addresses
Mar 31 00:04:13 millbarge dnsmasq[3011]: read 
/var/lib/libvirt/dnsmasq/default.addnhosts - 0 addresses
Mar 31 00:04:13 millbarge dnsmasq-dhcp[3011]: read 
/var/lib/libvirt/dnsmasq/default.hostsfile
Mar 31 00:27:57 millbarge dnsmasq[3011]: reading /etc/resolv.conf
Mar 31 00:27:57 millbarge dnsmasq[3011]: using nameserver 127.0.0.53#53
Mar 31 00:27:57 millbarge dnsmasq[3011]: reading /etc/resolv.conf
Mar 31 00:27:57 millbarge dnsmasq[3011]: using nameserver 127.0.0.53#53
Mar 31 00:27:57 millbarge dnsmasq[3011]: reading /etc/resolv.conf
Mar 31 00:27:57 millbarge dnsmasq[3011]: using nameserver 127.0.0.53#53
Mar 31 00:27:57 millbarge dnsmasq[3011]: reading /etc/resolv.conf
Mar 31 00:27:57 millbarge dnsmasq[3011]: using nameserver 127.0.0.53#53
Mar 31 00:27:57 millbarge dnsmasq[3011]: reading /etc/resolv.conf
Mar 31 00:27:57 millbarge dnsmasq[3011]: using nameserver 127.0.0.53#53
Mar 31 00:27:57 millbarge dnsmasq[3011]: reading /etc/resolv.conf
Mar 31 00:27:57 millbarge dnsmasq[3011]: using nameserver 127.0.0.53#53
Mar 31 00:27:57 millbarge dnsmasq[3011]: reading /etc/resolv.conf
Mar 31 00:27:57 millbarge dnsmasq[3011]: using nameserver 127.0.0.53#53
Mar 31 00:27:57 millbarge dnsmasq[3011]: reading /etc/resolv.conf
Mar 31 00:27:57 millbarge dnsmasq[3011]: using nameserver 127.0.0.53#53
Mar 31 00:27:57 millbarge dnsmasq[3011]: reading /etc/resolv.conf
Mar 31 00:27:57 millbarge dnsmasq[3011]: using nameserver 127.0.0.53#53
Mar 31 00:27:57 millbarge dnsmasq[3011]: reading /etc/resolv.conf
Mar 31 00:27:57 millbarge dnsmasq[3011]: using nameserver 127.0.0.53#53
Mar 31 00:27:57 millbarge dnsmasq[3011]: reading /etc/resolv.conf
Mar 31 00:27:57 millbarge dnsmasq[3011]: using nameserver 127.0.0.53#53

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https://bugs.launchpad.net/bugs/1869796

Title:
  vague error during upgrade

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