This is "just one more" case of the common old init scripts didn't
consider there could be more (=containers).
Interesting is that the stop already runs with the --pidfile so the stop
will not kill it.
But the start will be blocked, as the existance of such a process will
make --start be a no-op.
Man page:
Note: unless --pid or --pidfile are specified, start-stop-daemon behaves
similar to killall(1). start-stop-daemon will scan the process table looking
for any processes which match the process name, parent pid, uid, and/or
gid (if specified). Any matching process will prevent --start from starting the
daemon. All matching processes will be sent the TERM signal (or the one
specified via --signal or --retry) if --stop is specified. For daemons which
have long-lived children which need to live through a --stop, you must specify
a pidfile.
-S, --start [--] arguments
Check for the existence of a specified process. If such a process exists,
start-stop-daemon does nothing, and exits with error status 1 (0 if --oknodo is
specified). If such a process does not exist, it starts an instance, using
either the executable specified by --exec or, if specified, by --startas. Any
arguments given after -- on the command line are passed unmodified to the
program being started.
The --oknodo will make it a silent non fatal exit int hat case - as it
is fine to run "start" if it is running already.
I'd recommend "--pidfile $SMBDPID" instead of the suggested path, but otherwise
would agree to the fix.
It should be safe as that is essentially how later versions (Bionic) do
it (via MAINPID tracking in systemd).
** Changed in: samba (Ubuntu)
Status: New => Confirmed
** Tags added: server-next
** Also affects: samba (Ubuntu Xenial)
Importance: Undecided
Status: New
** Changed in: samba (Ubuntu Xenial)
Status: New => Triaged
** Changed in: samba (Ubuntu)
Status: Confirmed => Fix Released
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Matching subscriptions: Ubuntu 16.04 Bugs
https://bugs.launchpad.net/bugs/1792400
Title:
smbd failed in host when both lxd container and host have smbd
Status in samba package in Ubuntu:
Fix Released
Status in samba source package in Xenial:
Triaged
Bug description:
Setup: install smbd in host and lxd-container.
Now restart smbd in host:
service smbd restart
All is OK.
Problem: nmap shows "closed" on ports 139 and 445. And users cannot use smbd
server in host.
● smbd.service - LSB: start Samba SMB/CIFS daemon (smbd)
Loaded: loaded (/etc/init.d/smbd; bad; vendor preset: enabled)
Active: active (exited) since Die 2016-10-18 17:35:23 CEST; 2s ago
Docs: man:systemd-sysv-generator(8)
Process: 24218 ExecStop=/etc/init.d/smbd stop (code=exited,
status=0/SUCCESS)
Process: 21980 ExecReload=/etc/init.d/smbd reload (code=exited,
status=0/SUCCESS)
Process: 25190 ExecStart=/etc/init.d/smbd start (code=exited,
status=0/SUCCESS)
Okt 18 17:35:22 speedy systemd[1]: Starting LSB: start Samba SMB/CIFS daemon
(smbd)...
Okt 18 17:35:23 speedy smbd[25190]: * Starting SMB/CIFS daemon smbd
Okt 18 17:35:23 speedy smbd[25190]: ...done.
Okt 18 17:35:23 speedy systemd[1]: Started LSB: start Samba SMB/CIFS daemon
(smbd).
ps axf | grep smbd:
25356 pts/2 S+ 0:00 | \_ grep --color=auto smbd
19915 ? Ss 0:08 \_ /usr/sbin/smbd -D
19919 ? S 0:00 \_ /usr/sbin/smbd -D
However, netstat -tpln | grep "smbd" returns nothing and also nmap
shows "closed" on ports 139 and 445.
Workaround [1]:
change /etc/init.d/smbd:
if ! start-stop-daemon --start --quiet --oknodo --exec /usr/sbin/smbd -- -D
; then
to
if ! start-stop-daemon --start --quiet --oknodo --pidfile
/var/run/samba/smbd.pid --exec /usr/sbin/smbd -- -D ; then
I reported this to:
https://discuss.linuxcontainers.org/t/samba-in-host-and-container/2523
apt-cache policy samba
samba:
Installed: 2:4.3.11+dfsg-0ubuntu0.16.04.15
Candidate: 2:4.3.11+dfsg-0ubuntu0.16.04.16
Version table:
2:4.3.11+dfsg-0ubuntu0.16.04.16 500
500 http://de.archive.ubuntu.com/ubuntu xenial-updates/main amd64
Packages
*** 2:4.3.11+dfsg-0ubuntu0.16.04.15 500
500 http://security.ubuntu.com/ubuntu xenial-security/main amd64
Packages
100 /var/lib/dpkg/status
2:4.3.8+dfsg-0ubuntu1 500
500 http://de.archive.ubuntu.com/ubuntu xenial/main amd64 Packages
1. https://serverfault.com/questions/810544/samba-daemon-does-not-
work-as-systemd-service-but-works-in-foreground
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