Public bug reported:

I have installed samba, winbind, libpam-winbind, libnss-winbind,
kerberos, etc. so that I am able to in principle connect to a Windows
Server 2008 R2 active directory controller for AD based logins from
Ubuntu. I am able to use wbinfo -i, wbinfo -u, wbinfo -g to get the list
of users and see that the connection to the server is working. My
smb.conf is also configured for winbind user enum = yes, so that getent
passwd and getent group lists those from the server machine (implying
nsswitch.conf is also correct).

I don't know how to get winbind to start automatically on startup and
the apt install scripts didn't do this as expected.

The problem is, on startup of Ubuntu 16.04, the winbind service is not
started. This prevents logging in via the console, or the lightdm
manager with a domain user name and password.

I see that:
root@leon-ubuntu:/run/systemd/generator.late# systemctl status winbind
● winbind.service - LSB: start Winbind daemon
   Loaded: loaded (/etc/init.d/winbind; bad; vendor preset: enabled)
   Active: inactive (dead)
     Docs: man:systemd-sysv-generator(8)

root@leon-ubuntu:/run/systemd/generator.late# service winbind status
● winbind.service - LSB: start Winbind daemon
   Loaded: loaded (/etc/init.d/winbind; bad; vendor preset: enabled)
   Active: inactive (dead)
     Docs: man:systemd-sysv-generator(8)

root@leon-ubuntu:/run/systemd/generator.late# systemctl enable winbind.service
winbind.service is not a native service, redirecting to systemd-sysv-install
Executing /lib/systemd/systemd-sysv-install enable winbind
insserv: warning: current start runlevel(s) (empty) of script `winbind' 
overrides LSB defaults (2 3 4 5).
insserv: warning: current stop runlevel(s) (0 1 2 3 4 5 6) of script `winbind' 
overrides LSB defaults (0 1 6).
insserv: pushd() can not change to directory /etc/init.d: No such file or 
directory
update-rc.d: error: insserv rejected the script header

I see no particular log entries in /var/log on startup, so it appears
confirmed that Ubuntu doesn't start winbind on startup as one would
expect.

If I am to manually start the winbind service with:
# service winbind start

then logging in works fine and everything is good and works as expected.

or with:
# systemctl winbind start
● winbind.service - LSB: start Winbind daemon
   Loaded: loaded (/etc/init.d/winbind; bad; vendor preset: enabled)
   Active: active (running) since Mi 2016-03-30 21:10:34 CEST; 38s ago
     Docs: man:systemd-sysv-generator(8)
  Process: 3841 ExecStart=/etc/init.d/winbind start (code=exited, status=0/SUCCE
    Tasks: 2 (limit: 512)
   CGroup: /system.slice/winbind.service
           ├─3860 /usr/sbin/winbindd -d10
           └─3861 /usr/sbin/winbindd -d10

Mär 30 21:10:34 leon-ubuntu winbind[3841]:   msdfs: 10
Mär 30 21:10:34 leon-ubuntu winbind[3841]:   dmapi: 10
Mär 30 21:10:34 leon-ubuntu winbind[3841]:   registry: 10
Mär 30 21:10:34 leon-ubuntu winbind[3841]:   scavenger: 10
Mär 30 21:10:34 leon-ubuntu winbind[3841]:   dns: 10
Mär 30 21:10:34 leon-ubuntu winbind[3841]:   ldb: 10
Mär 30 21:10:34 leon-ubuntu winbind[3841]:   tevent: 10
Mär 30 21:10:34 leon-ubuntu winbind[3841]: Maximum core file size limits now 167
Mär 30 21:10:34 leon-ubuntu winbind[3841]:    ...done.
Mär 30 21:10:34 leon-ubuntu systemd[1]: Started LSB: start Winbind daemon.

The relevant configuration of nsswitch.conf:
passwd:         compat winbind
group:          compat winbind
shadow:         compat

The relevant configuration of smb.conf:
[global]
  realm = HOME.LAN
  workgroup = HOME
  security = ADS
  dedicated keytab file = /etc/krb5.keytab
  kerberos method = secrets and keytab
  netbios name = leon-ubuntu
   dns proxy = no
   #idmap uid = 10000-20000
   #idmap gid = 10000-20000
   idmap config *:backend = tdb
   idmap config *:range = 2000-9999
   idmap config HOME:backend = rid
   idmap config HOME:schema_mode = rfc2307
   idmap config HOME:range = 10000-99999
   idmap config HOME:default = yes

   winbind nss info = rfc2307
   winbind trusted domains only = no
   winbind use default domain = yes
   winbind enum users = yes
   winbind enum groups = yes
   winbind refresh tickets = yes
   winbind normalize names = yes
   store dos attributes = yes
   vfs objects = acl_xattr
   map acl inherit = yes

   name resolve order = bcast host lmhosts wins

   template shell = /bin/bash
   template homedir = /home/%U
   client use spnego = yes
   client ntlmv2 auth = yes
   encrypt passwords = yes
   restrict anonymous = 2
   usershare max shares = 100
   usershare allow guests = yes

The results of the file /run/systemd/generator.late/winbind.service is:
# Automatically generated by systemd-sysv-generator

[Unit]
Documentation=man:systemd-sysv-generator(8)
SourcePath=/etc/init.d/winbind
Description=LSB: start Winbind daemon
Before=shutdown.target
After=network-online.target
After=remote-fs.target
After=systemd-journald-dev-log.socket
After=samba.service
Wants=network-online.target
Conflicts=shutdown.target

[Service]
Type=forking
Restart=no
TimeoutSec=5min
IgnoreSIGPIPE=no
KillMode=process
GuessMainPID=no
RemainAfterExit=yes
ExecStart=/etc/init.d/winbind start
ExecStop=/etc/init.d/winbind stop

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: winbind 2:4.3.6+dfsg-1ubuntu1
ProcVersionSignature: Ubuntu 4.4.0-15.31-generic 4.4.6
Uname: Linux 4.4.0-15-generic x86_64
ApportVersion: 2.20-0ubuntu3
Architecture: amd64
CurrentDesktop: Unity
Date: Wed Mar 30 20:58:49 2016
InstallationDate: Installed on 2016-03-28 (2 days ago)
InstallationMedia: Ubuntu 16.04 LTS "Xenial Xerus" - Beta amd64 (20160323)
RelatedPackageVersions:
 nautilus 1:3.18.4.is.3.14.3-0ubuntu4
 gvfs     1.27.92-1ubuntu1
SambaClientRegression: Yes
SourcePackage: samba
UpgradeStatus: No upgrade log present (probably fresh install)
mtime.conffile..etc.init.d.winbind: 2016-03-30T20:32:33.668365

** Affects: samba (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug xenial

** Description changed:

  I have installed samba, winbind, libpam-winbind, libnss-winbind,
  kerberos, etc. so that I am able to in principle connect to a Windows
  Server 2008 R2 active directory controller for AD based logins from
  Ubuntu. I am able to use wbinfo -i, wbinfo -u, wbinfo -g to get the list
  of users and see that the connection to the server is working. My
  smb.conf is also configured for winbind user enum = yes, so that getent
  passwd and getent group lists those from the server machine (implying
  nsswitch.conf is also correct).
  
  I don't know how to get winbind to start automatically on startup and
  the apt install scripts didn't do this as expected.
  
  The problem is, on startup of Ubuntu 16.04, the winbind service is not
  started. This prevents logging in via the console, or the lightdm
  manager with a domain user name and password.
  
  I see that:
  root@leon-ubuntu:/run/systemd/generator.late# systemctl status winbind
  ● winbind.service - LSB: start Winbind daemon
-    Loaded: loaded (/etc/init.d/winbind; bad; vendor preset: enabled)
-    Active: inactive (dead)
-      Docs: man:systemd-sysv-generator(8)
+    Loaded: loaded (/etc/init.d/winbind; bad; vendor preset: enabled)
+    Active: inactive (dead)
+      Docs: man:systemd-sysv-generator(8)
  
  root@leon-ubuntu:/run/systemd/generator.late# service winbind status
  ● winbind.service - LSB: start Winbind daemon
-    Loaded: loaded (/etc/init.d/winbind; bad; vendor preset: enabled)
-    Active: inactive (dead)
-      Docs: man:systemd-sysv-generator(8)
+    Loaded: loaded (/etc/init.d/winbind; bad; vendor preset: enabled)
+    Active: inactive (dead)
+      Docs: man:systemd-sysv-generator(8)
  
  root@leon-ubuntu:/run/systemd/generator.late# systemctl enable winbind.service
  winbind.service is not a native service, redirecting to systemd-sysv-install
  Executing /lib/systemd/systemd-sysv-install enable winbind
  insserv: warning: current start runlevel(s) (empty) of script `winbind' 
overrides LSB defaults (2 3 4 5).
  insserv: warning: current stop runlevel(s) (0 1 2 3 4 5 6) of script 
`winbind' overrides LSB defaults (0 1 6).
  insserv: pushd() can not change to directory /etc/init.d: No such file or 
directory
  update-rc.d: error: insserv rejected the script header
+ 
+ I see no particular log entries in /var/log on startup, so it appears
+ confirmed that Ubuntu doesn't start winbind on startup as one would
+ expect.
  
  If I am to manually start the winbind service with:
  # service winbind start
  
  then logging in works fine and everything is good and works as expected.
  
  or with:
  # systemctl winbind start
  ● winbind.service - LSB: start Winbind daemon
     Loaded: loaded (/etc/init.d/winbind; bad; vendor preset: enabled)
     Active: active (running) since Mi 2016-03-30 21:10:34 CEST; 38s ago
       Docs: man:systemd-sysv-generator(8)
    Process: 3841 ExecStart=/etc/init.d/winbind start (code=exited, 
status=0/SUCCE
      Tasks: 2 (limit: 512)
     CGroup: /system.slice/winbind.service
             ├─3860 /usr/sbin/winbindd -d10
             └─3861 /usr/sbin/winbindd -d10
  
  Mär 30 21:10:34 leon-ubuntu winbind[3841]:   msdfs: 10
  Mär 30 21:10:34 leon-ubuntu winbind[3841]:   dmapi: 10
  Mär 30 21:10:34 leon-ubuntu winbind[3841]:   registry: 10
  Mär 30 21:10:34 leon-ubuntu winbind[3841]:   scavenger: 10
  Mär 30 21:10:34 leon-ubuntu winbind[3841]:   dns: 10
  Mär 30 21:10:34 leon-ubuntu winbind[3841]:   ldb: 10
  Mär 30 21:10:34 leon-ubuntu winbind[3841]:   tevent: 10
  Mär 30 21:10:34 leon-ubuntu winbind[3841]: Maximum core file size limits now 
167
  Mär 30 21:10:34 leon-ubuntu winbind[3841]:    ...done.
  Mär 30 21:10:34 leon-ubuntu systemd[1]: Started LSB: start Winbind daemon.
  
- I see no particular log entries in /var/log on startup, so it appears
- confirmed that Ubuntu doesn't start winbind on startup as one would
- expect.
- 
  The relevant configuration of nsswitch.conf:
  passwd:         compat winbind
  group:          compat winbind
  shadow:         compat
  
  The relevant configuration of smb.conf:
  [global]
-   realm = HOME.LAN
-   workgroup = HOME
-   security = ADS
-   dedicated keytab file = /etc/krb5.keytab
-   kerberos method = secrets and keytab
-   netbios name = leon-ubuntu
-    dns proxy = no
-    #idmap uid = 10000-20000
-    #idmap gid = 10000-20000
-    idmap config *:backend = tdb
-    idmap config *:range = 2000-9999
-    idmap config HOME:backend = rid
-    idmap config HOME:schema_mode = rfc2307
-    idmap config HOME:range = 10000-99999
-    idmap config HOME:default = yes
+   realm = HOME.LAN
+   workgroup = HOME
+   security = ADS
+   dedicated keytab file = /etc/krb5.keytab
+   kerberos method = secrets and keytab
+   netbios name = leon-ubuntu
+    dns proxy = no
+    #idmap uid = 10000-20000
+    #idmap gid = 10000-20000
+    idmap config *:backend = tdb
+    idmap config *:range = 2000-9999
+    idmap config HOME:backend = rid
+    idmap config HOME:schema_mode = rfc2307
+    idmap config HOME:range = 10000-99999
+    idmap config HOME:default = yes
  
-    winbind nss info = rfc2307
-    winbind trusted domains only = no
-    winbind use default domain = yes
-    winbind enum users = yes
-    winbind enum groups = yes
-    winbind refresh tickets = yes
-    winbind normalize names = yes
-    store dos attributes = yes
-    vfs objects = acl_xattr
-    map acl inherit = yes
+    winbind nss info = rfc2307
+    winbind trusted domains only = no
+    winbind use default domain = yes
+    winbind enum users = yes
+    winbind enum groups = yes
+    winbind refresh tickets = yes
+    winbind normalize names = yes
+    store dos attributes = yes
+    vfs objects = acl_xattr
+    map acl inherit = yes
  
-    name resolve order = bcast host lmhosts wins
+    name resolve order = bcast host lmhosts wins
  
-    template shell = /bin/bash
-    template homedir = /home/%U
-    client use spnego = yes
-    client ntlmv2 auth = yes
-    encrypt passwords = yes
-    restrict anonymous = 2
-    usershare max shares = 100
-    usershare allow guests = yes
+    template shell = /bin/bash
+    template homedir = /home/%U
+    client use spnego = yes
+    client ntlmv2 auth = yes
+    encrypt passwords = yes
+    restrict anonymous = 2
+    usershare max shares = 100
+    usershare allow guests = yes
  
  The results of the file /run/systemd/generator.late/winbind.service is:
  # Automatically generated by systemd-sysv-generator
  
  [Unit]
  Documentation=man:systemd-sysv-generator(8)
  SourcePath=/etc/init.d/winbind
  Description=LSB: start Winbind daemon
  Before=shutdown.target
  After=network-online.target
  After=remote-fs.target
  After=systemd-journald-dev-log.socket
  After=samba.service
  Wants=network-online.target
  Conflicts=shutdown.target
  
  [Service]
  Type=forking
  Restart=no
  TimeoutSec=5min
  IgnoreSIGPIPE=no
  KillMode=process
  GuessMainPID=no
  RemainAfterExit=yes
  ExecStart=/etc/init.d/winbind start
  ExecStop=/etc/init.d/winbind stop
  
  ProblemType: Bug
  DistroRelease: Ubuntu 16.04
  Package: winbind 2:4.3.6+dfsg-1ubuntu1
  ProcVersionSignature: Ubuntu 4.4.0-15.31-generic 4.4.6
  Uname: Linux 4.4.0-15-generic x86_64
  ApportVersion: 2.20-0ubuntu3
  Architecture: amd64
  CurrentDesktop: Unity
  Date: Wed Mar 30 20:58:49 2016
  InstallationDate: Installed on 2016-03-28 (2 days ago)
  InstallationMedia: Ubuntu 16.04 LTS "Xenial Xerus" - Beta amd64 (20160323)
  RelatedPackageVersions:
-  nautilus 1:3.18.4.is.3.14.3-0ubuntu4
-  gvfs     1.27.92-1ubuntu1
+  nautilus 1:3.18.4.is.3.14.3-0ubuntu4
+  gvfs     1.27.92-1ubuntu1
  SambaClientRegression: Yes
  SourcePackage: samba
  UpgradeStatus: No upgrade log present (probably fresh install)
  mtime.conffile..etc.init.d.winbind: 2016-03-30T20:32:33.668365

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https://bugs.launchpad.net/bugs/1564043

Title:
  winbindd not able to start on system startup

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