[Pkg-samba-maint] Bug#855918: samba: connection refused after reboot, fixable by systemctl restart smbd
Vladislav Kurz
vladislav.kurz at webstep.net
Fri Jan 19 09:48:59 UTC 2018
Package: samba
Version: 2:4.5.12+dfsg-2+deb9u1
Followup-For: Bug #855918
Dear Maintainer,
I have encountered the buggy behavior described here, while debugging bug #887556
To mee it seems that the option After=nmbd.service is
ignored somehow, and thus smbd is started before the nework
is online. I have checked it by repeated reboots. I have
removed all my custom units including ZFS, that could affect
the boot ordering. I also tried to split the After option to
several lines with one dependecy per line. Nothing hleped,
smbd starts consistently before network-online (dhclient).
I have checked the smbd, nmbd.service units, checked
journalctl -b, plotted grpahs using sytemd-analyze, but I
could not find anything wrong - no ordering cycle,
everything seems to be as it should.
Perhaps this should be consulted with systemd maintainers,
as the problem might be there. I admit I'm a bit biased
against systemd, as I have spent few days debugging the boot
ordering, which in sysvinit would be a trivial task.
Samba is in default config after install. This is the
relevant part of syslog:
Jan 19 10:06:06 gw kernel: [ 40.791981] tg3 0000:02:00.0 eno1: Link is up at 1000 Mbps, full duplex
Jan 19 10:06:06 gw kernel: [ 40.791992] tg3 0000:02:00.0 eno1: Flow control is off for TX and off for RX
Jan 19 10:06:06 gw kernel: [ 40.791996] tg3 0000:02:00.0 eno1: EEE is disabled
Jan 19 10:06:06 gw kernel: [ 40.792031] IPv6: ADDRCONF(NETDEV_CHANGE): eno1: link becomes ready
Jan 19 10:06:08 gw dhclient[874]: DHCPDISCOVER on eno1 to 255.255.255.255 port 67 interval 10
Jan 19 10:06:08 gw ifup[840]: DHCPDISCOVER on eno1 to 255.255.255.255 port 67 interval 10
Jan 19 10:06:09 gw dhclient[874]: DHCPREQUEST of 192.168.220.136 on eno1 to 255.255.255.255 port 67
Jan 19 10:06:09 gw ifup[840]: DHCPREQUEST of 192.168.220.136 on eno1 to 255.255.255.255 port 67
Jan 19 10:06:09 gw ifup[840]: DHCPOFFER of 192.168.220.136 from 192.168.220.1
Jan 19 10:06:09 gw dhclient[874]: DHCPOFFER of 192.168.220.136 from 192.168.220.1
Jan 19 10:06:09 gw dhclient[874]: DHCPACK of 192.168.220.136 from 192.168.220.1
Jan 19 10:06:09 gw ifup[840]: DHCPACK of 192.168.220.136 from 192.168.220.1
Jan 19 10:06:09 gw systemd[1]: Starting Samba SMB Daemon...
Jan 19 10:06:10 gw systemd[1]: smbd.service: Supervising process 944 which is not our child. We'll most likely not notice when it exits.
Jan 19 10:06:10 gw systemd[1]: Started Samba SMB Daemon.
Jan 19 10:06:10 gw dhclient[874]: bound to 192.168.220.136 -- renewal in 35078 seconds.
Jan 19 10:06:10 gw ifup[840]: bound to 192.168.220.136 -- renewal in 35078 seconds.
Jan 19 10:06:10 gw kernel: [ 45.080527] IPv6: ADDRCONF(NETDEV_UP): eno2: link is not ready
Jan 19 10:06:10 gw systemd[1]: Started Raise network interfaces.
Jan 19 10:06:10 gw systemd[1]: Reached target Network.
Jan 19 10:06:10 gw systemd[1]: Reached target Network is Online.
Jan 19 10:06:10 gw systemd[1]: Starting LSB: exim Mail Transport Agent...
Jan 19 10:06:10 gw systemd[1]: Starting LSB: DHCP server...
Jan 19 10:06:10 gw systemd[1]: Starting LSB: Start NTP daemon...
Jan 19 10:06:10 gw systemd[1]: Starting Samba NMB Daemon...
Jan 19 10:06:10 gw systemd[1]: Starting LSB: disk temperature monitoring daemon...
Jan 19 10:06:10 gw systemd[1]: Starting Permit User Sessions...
Jan 19 10:06:10 gw systemd[1]: Starting OpenBSD Secure Shell server...
Jan 19 10:06:10 gw systemd[1]: Started Permit User Sessions.
Jan 19 10:06:10 gw systemd[1]: Created slice User Slice of root.
Jan 19 10:06:10 gw systemd[1]: Starting User Manager for UID 0...
Jan 19 10:06:10 gw systemd[1]: Started Getty on tty1.
Jan 19 10:06:10 gw systemd[1]: Reached target Login Prompts.
Jan 19 10:06:10 gw systemd[1]: nmbd.service: Supervising process 1040 which is not our child. We'll most likely not notice when it exits.
Jan 19 10:06:10 gw systemd[1]: Started Samba NMB Daemon.
Just for record:
~# cat /lib/systemd/system/smbd.service
[Unit]
Description=Samba SMB Daemon
Documentation=man:smbd(8) man:samba(7) man:smb.conf(5)
After=network.target
After=nmbd.service
After=winbind.service
[Service]
Type=notify
NotifyAccess=all
PIDFile=/var/run/samba/smbd.pid
LimitNOFILE=16384
EnvironmentFile=-/etc/default/samba
ExecStart=/usr/sbin/smbd $SMBDOPTIONS
ExecReload=/bin/kill -HUP $MAINPID
LimitCORE=infinity
[Install]
WantedBy=multi-user.target
====
~# cat /lib/systemd/system/nmbd.service
[Unit]
Description=Samba NMB Daemon
Documentation=man:nmbd(8) man:samba(7) man:smb.conf(5)
After=network-online.target
Wants=network-online.target
[Service]
Type=notify
NotifyAccess=all
PIDFile=/var/run/samba/nmbd.pid
EnvironmentFile=-/etc/default/samba
ExecStart=/usr/sbin/nmbd $NMBDOPTIONS
ExecReload=/bin/kill -HUP $MAINPID
LimitCORE=infinity
[Install]
WantedBy=multi-user.target
====
Best Regards
Vladislav Kurz
-- System Information:
Debian Release: 9.3
APT prefers stable-updates
APT policy: (500, 'stable-updates'), (500, 'stable')
Architecture: amd64 (x86_64)
Kernel: Linux 4.9.0-5-amd64 (SMP w/4 CPU cores)
Locale: LANG=C.UTF-8, LC_CTYPE=C.UTF-8 (charmap=UTF-8), LANGUAGE=C.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)
Versions of packages samba depends on:
ii adduser 3.115
ii dpkg 1.18.24
ii init-system-helpers 1.48
ii libbsd0 0.8.3-1
ii libc6 2.24-11+deb9u1
ii libldb1 2:1.1.27-1+b1
ii libpam-modules 1.1.8-3.6
ii libpam-runtime 1.1.8-3.6
ii libpopt0 1.16-10+b2
ii libpython2.7 2.7.13-2+deb9u2
ii libtalloc2 2.1.8-1
ii libtdb1 1.3.11-2
ii libtevent0 0.9.31-1
ii libwbclient0 2:4.5.12+dfsg-2+deb9u1
ii lsb-base 9.20161125
ii procps 2:3.3.12-3
ii python 2.7.13-2
ii python-dnspython 1.15.0-1
ii python-samba 2:4.5.12+dfsg-2+deb9u1
ii python2.7 2.7.13-2+deb9u2
ii samba-common 2:4.5.12+dfsg-2+deb9u1
ii samba-common-bin 2:4.5.12+dfsg-2+deb9u1
ii samba-libs 2:4.5.12+dfsg-2+deb9u1
ii tdb-tools 1.3.11-2
ii update-inetd 4.44
Versions of packages samba recommends:
ii attr 1:2.4.47-2+b2
ii logrotate 3.11.0-0.1
ii samba-dsdb-modules 2:4.5.12+dfsg-2+deb9u1
ii samba-vfs-modules 2:4.5.12+dfsg-2+deb9u1
Versions of packages samba suggests:
pn bind9 <none>
pn bind9utils <none>
pn ctdb <none>
pn ldb-tools <none>
ii ntp 1:4.2.8p10+dfsg-3+deb9u1
pn smbldap-tools <none>
pn ufw <none>
pn winbind <none>
-- no debconf information
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