Public bug reported:
On current xenial, LXD containers take ages to reboot:
lxc launch images:ubuntu/xenial/amd64 x1
lxc exec x1 reboot
"systemctl list-jobs" shows:
117 networking.service stop running
root@x1:~# systemctl status networking
● networking.service - Raise network interfaces
Loaded: loaded (/lib/systemd/system/networking.service; enabled; vendor
preset: enabled)
Drop-In: /run/systemd/generator/networking.service.d
└─50-insserv.conf-$network.conf
Active: deactivating (stop-sigterm) since Fri 2016-03-11 16:03:51 UTC; 21s
ago
Docs: man:interfaces(5)
Process: 187 ExecStop=/sbin/ifdown -a --read-environment (code=exited,
status=0/SUCCESS)
Process: 55 ExecStart=/sbin/ifup -a --read-environment (code=exited,
status=0/SUCCESS)
Process: 49 ExecStartPre=/bin/sh -c [ "$CONFIGURE_INTERFACES" != "no" ] && [
-n "$(ifquery --r
Main PID: 55 (code=exited, status=0/SUCCESS)
Tasks: 1 (limit: 512)
CGroup: /system.slice/networking.service
└─146 /sbin/dhclient -1 -v -pf /run/dhclient.eth0.pid -lf
/var/lib/dhcp/dhclient.eth0
Mar 11 16:03:52 x1 dhclient[207]: For info, please visit
https://www.isc.org/software/dhcp/
Mar 11 16:03:52 x1 dhclient[207]:
Mar 11 16:03:52 x1 dhclient[207]: Listening on LPF/eth0/00:16:3e:5a:f5:97
Mar 11 16:03:52 x1 ifdown[187]: Listening on LPF/eth0/00:16:3e:5a:f5:97
Mar 11 16:03:52 x1 ifdown[187]: Sending on LPF/eth0/00:16:3e:5a:f5:97
Mar 11 16:03:52 x1 ifdown[187]: Sending on Socket/fallback
Mar 11 16:03:52 x1 dhclient[207]: Sending on LPF/eth0/00:16:3e:5a:f5:97
Mar 11 16:03:52 x1 dhclient[207]: Sending on Socket/fallback
Mar 11 16:03:52 x1 dhclient[207]: DHCPRELEASE on eth0 to 10.0.3.1 port 67
(xid=0x6480ef2b)
Mar 11 16:03:52 x1 ifdown[187]: DHCPRELEASE on eth0 to 10.0.3.1 port 67
(xid=0x6480ef2b)
The above is also the last journal line that I get for the usual 90s
timeout, then the container finally reboots.
Not many processes are actually running any more:
root 1 0.0 0.0 37076 5304 ? Ss 16:03 0:00 /sbin/init
root 38 0.0 0.0 41572 3316 ? Ss 16:03 0:00
/lib/systemd/systemd-udevd
root 41 0.0 0.0 35276 5668 ? Ss 16:03 0:00
/lib/systemd/systemd-journald
root 146 0.0 0.0 181376 2664 ? Ss 16:03 0:00 /sbin/dhclient
-1 -v -pf /run/dhclient.eth0.pid -lf /var/lib/dhcp/dhclient.eth0.leases -I -df
/var/lib/dhcp/dhclient6.eth0.leases eth0
but apparently the dhclient instance refuses to die (note that ifdown -a
itself is not running any more).
** Affects: ifupdown (Ubuntu)
Importance: High
Assignee: Martin Pitt (pitti)
Status: Triaged
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https://bugs.launchpad.net/bugs/1556175
Title:
networking.service hangs on shutdown -- ifdown fails to kill dhclient
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