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Mario Pio Russo

2015-Sep-01 11:04 UTC

[Samba] on linux samba file shares, groups and user are randomlly lost. Using samba4 as Domain controller

Good day All

I am re proposing this topic as it keeps happening in our enviroment and is
creating some trouble now.

I have 1 samba file share server, and a different samba4 AD server.

the file server has been recently updated to Ubuntu 14 and its native samba
4.1.6. The samba4 AD is on Ubuntu 14 and on sernet-samba 4.2.2.

what happens is that every 4~5 days the file share server loses randomly
the groups/users associations. when doing ls on the shares, I do not see
the domain users / groups but I just see their uid. when I try to access
those shares, it gives permission denied. The only option is to reboot the
file server. after reboot all comes back to normal. I can see the
user/groups when "ls" and I can access mount the shares. but after a
while
all comes back again. Note that when the system is not working, getent
group does not show anything, but wbinfo -g shows the groups correctlly. On
the AD, I have disabled the winbindd and I am using the original winbind.

Here is the  2 smb.conf files (Note, i have cut off most of the shares )

Samba file share:

[global]
        workgroup = CCDC
        realm = CCDC.LAN
        server string = CSI Samba Server
        server role = member server
        security = ADS
        map untrusted to domain = Yes
        syslog = 0
        log file = /var/log/samba/log.%m
        max log size = 2000
        #smb ports = 139
        name resolve order = wins, host, bcast
        server signing = required
        socket options = SO_RCVBUF=262144 SO_SNDBUF=262144 SO_KEEPALIVE
IPTOS_LOWDELAY TCP_NODELAY
        load printers = No
        disable spoolss = Yes
        local master = No
        domain master = No
        dns proxy = No
        wins server = 9.161.96.220
        template homedir = /home/winbind
        winbind cache time = 15
        winbind enum users = Yes
        winbind enum groups = Yes
        winbind use default domain = Yes
        idmap config * : range = 10000-20000
        full_audit:priority = NOTICE
        full_audit:facility = local7
        full_audit:failure = mkdir rename unlink rmdir open chown chmod
connect readlink
        full_audit:prefix = %u,%I,%m,%S
        idmap config * : backend = tdb
        invalid users = root, daemon, bin, sys, sync, games, man, lp, mail,
news, uucp, proxy, www-data, backup, list, irc, g
nats, Debian-exim, sshd, ntpd
        acl group control = Yes
        aio read size = 1
        aio write size = 1
        map acl inherit = Yes
        hide files = /lost+found/
        follow symlinks = No
        dos filemode = Yes
        vfs objects = full_audit

[workplace]
      comment              = ICS - CSI mantis build and daily kits folder
      path                 = /export/ICS/CSI/workplace
      valid users          = @"domainusers"
      force create mode    = 750
      force directory mode = 740
      writeable            = Yes
      browseable           = Yes

[labadmins]
      comment              = ICS - CSI Admins Share
      path                 = /export/ICS/CSI/labadmins
      valid users          = @smbLabAdmins
      force create mode    = 750
      force directory mode = 740
      writeable            = Yes
      browseable           = Yes




samba AD :

# Global parameters
[global]
        workgroup = CCDC
        realm = CCDC.LAN
        netbios name = CCDC-SAMBA4-DC1
        server role = active directory domain controller
        idmap_ldb:use rfc2307 = yes

        server services = -winbindd +winbind
        dns forwarder = 9.0.138.50
        #server services = -winbindd +winbind
        idmap config CCDC:backend = ad
        idmap config CCDC:schema_mode = rfc2307
        idmap config CCDC:range = 10000-40000


        # Store UIDs/GIDs for all other domains (including local
        # accounts/groups of this server) in a tdb file
        idmap config *:backend = tdb
        idmap config *:range = 2000-9999

        # Use home directory and shell information from AD
        winbind nss info = rfc2307

        tls enabled  = yes
        tls keyfile  = tls/myKey.pem
        tls certfile = tls/myCert.pem
        tls cafile   
[netlogon]
        path = /var/lib/samba/sysvol/ccdc.lan/scripts
        read only = No

[sysvol]
        path = /var/lib/samba/sysvol
        read only = No



Funny thing is that I can't find anything relevant in the logs of the file
share server.

Any help is really appreciated.

Thank you

___________________________________________________________________________________________

Mario Pio Russo, System Admin SWG IT Services Dublin, Phone & FAX: +353 1
815 2236, eMail: mariopiorusso at ie.ibm.com
IBM Ireland Product Distribution Limited registered in Ireland with number
92815. Registered Office: IBM House, Shelbourne Road, Ballsbridge, Dublin 4

(Embedded image moved to file: pic39243.gif)

Rowland Penny

2015-Sep-01 12:49 UTC

head link

[Samba] on linux samba file shares, groups and user are randomlly lost. Using samba4 as Domain controller

On 01/09/15 12:04, Mario Pio Russo wrote:>
> Good day All
>
> I am re proposing this topic as it keeps happening in our enviroment and is
> creating some trouble now.
>
> I have 1 samba file share server, and a different samba4 AD server.
>
> the file server has been recently updated to Ubuntu 14 and its native samba
> 4.1.6. The samba4 AD is on Ubuntu 14 and on sernet-samba 4.2.2.
>
> what happens is that every 4~5 days the file share server loses randomly
> the groups/users associations. when doing ls on the shares, I do not see
> the domain users / groups but I just see their uid. when I try to access
> those shares, it gives permission denied. The only option is to reboot the
> file server. after reboot all comes back to normal. I can see the
> user/groups when "ls" and I can access mount the shares. but
after a while
> all comes back again. Note that when the system is not working, getent
> group does not show anything, but wbinfo -g shows the groups correctlly. On
> the AD, I have disabled the winbindd and I am using the original winbind.
>
> Here is the  2 smb.conf files (Note, i have cut off most of the shares )
>
> Samba file share:
>
> [global]
>          workgroup = CCDC
>          realm = CCDC.LAN
>          server string = CSI Samba Server
>          server role = member server
>          security = ADS
>          map untrusted to domain = Yes
>          syslog = 0
>          log file = /var/log/samba/log.%m
>          max log size = 2000
>          #smb ports = 139
>          name resolve order = wins, host, bcast
>          server signing = required
>          socket options = SO_RCVBUF=262144 SO_SNDBUF=262144 SO_KEEPALIVE
> IPTOS_LOWDELAY TCP_NODELAY
>          load printers = No
>          disable spoolss = Yes
>          local master = No
>          domain master = No
>          dns proxy = No
>          wins server = 9.161.96.220
>          template homedir = /home/winbind
>          winbind cache time = 15
>          winbind enum users = Yes
>          winbind enum groups = Yes
>          winbind use default domain = Yes
>          idmap config * : range = 10000-20000
>          full_audit:priority = NOTICE
>          full_audit:facility = local7
>          full_audit:failure = mkdir rename unlink rmdir open chown chmod
> connect readlink
>          full_audit:prefix = %u,%I,%m,%S
>          idmap config * : backend = tdb
>          invalid users = root, daemon, bin, sys, sync, games, man, lp,
mail,
> news, uucp, proxy, www-data, backup, list, irc, g
> nats, Debian-exim, sshd, ntpd
>          acl group control = Yes
>          aio read size = 1
>          aio write size = 1
>          map acl inherit = Yes
>          hide files = /lost+found/
>          follow symlinks = No
>          dos filemode = Yes
>          vfs objects = full_audit
>
> [workplace]
>        comment              = ICS - CSI mantis build and daily kits folder
>        path                 = /export/ICS/CSI/workplace
>        valid users          = @"domainusers"
>        force create mode    = 750
>        force directory mode = 740
>        writeable            = Yes
>        browseable           = Yes
>
> [labadmins]
>        comment              = ICS - CSI Admins Share
>        path                 = /export/ICS/CSI/labadmins
>        valid users          = @smbLabAdmins
>        force create mode    = 750
>        force directory mode = 740
>        writeable            = Yes
>        browseable           = Yes
>
>
>
>
> samba AD :
>
> # Global parameters
> [global]
>          workgroup = CCDC
>          realm = CCDC.LAN
>          netbios name = CCDC-SAMBA4-DC1
>          server role = active directory domain controller
>          idmap_ldb:use rfc2307 = yes
>
>          server services = -winbindd +winbind
>          dns forwarder = 9.0.138.50
>          #server services = -winbindd +winbind
>          idmap config CCDC:backend = ad
>          idmap config CCDC:schema_mode = rfc2307
>          idmap config CCDC:range = 10000-40000
>
>
>          # Store UIDs/GIDs for all other domains (including local
>          # accounts/groups of this server) in a tdb file
>          idmap config *:backend = tdb
>          idmap config *:range = 2000-9999
>
>          # Use home directory and shell information from AD
>          winbind nss info = rfc2307
>
>          tls enabled  = yes
>          tls keyfile  = tls/myKey.pem
>          tls certfile = tls/myCert.pem
>          tls cafile   >
> [netlogon]
>          path = /var/lib/samba/sysvol/ccdc.lan/scripts
>          read only = No
>
> [sysvol]
>          path = /var/lib/samba/sysvol
>          read only = No
>
>
>
> Funny thing is that I can't find anything relevant in the logs of the
file
> share server.
>
> Any help is really appreciated.
>
> Thank you
>
>
___________________________________________________________________________________________
>
> Mario Pio Russo, System Admin SWG IT Services Dublin, Phone & FAX: +353
1
> 815 2236, eMail: mariopiorusso at ie.ibm.com
> IBM Ireland Product Distribution Limited registered in Ireland with number
> 92815. Registered Office: IBM House, Shelbourne Road, Ballsbridge, Dublin 4
>
> (Embedded image moved to file: pic39243.gif)
OK, I recommend you change your smb.conf files to these:

[global]
         workgroup = CCDC
         realm = CCDC.LAN
         security = ADS
         dedicated keytab file = /etc/krb5.keytab
         kerberos method = secrets and keytab
         server string = CSI Samba Server
         winbind enum users = Yes
         winbind enum groups = Yes
         winbind use default domain = Yes
         winbind cache time = 15
         winbind refresh tickets = Yes
         idmap config * : backend = tdb
         idmap config * : range = 2000-9999
         idmap config CCDC : backend = rid
         idmap config CCDC : range = 10000-20000
         map untrusted to domain = Yes
         syslog = 0
         log file = /var/log/samba/log.%m
         max log size = 2000
         #smb ports = 139
         name resolve order = wins, host, bcast
         server signing = required
         load printers = No
         disable spoolss = Yes
         local master = No
         domain master = No
         dns proxy = No
         wins server = 9.161.96.220
         template homedir = /home/winbind
         full_audit:priority = NOTICE
         full_audit:facility = local7
         full_audit:failure = mkdir rename unlink rmdir open chown chmod 
connect readlink
         full_audit:prefix = %u,%I,%m,%S
         invalid users = root, daemon, bin, sys, sync, games, man, lp, 
mail,news, uucp, proxy, www-data, backup, list, irc, gnats, Debian-exim, 
sshd, ntpd
         acl group control = Yes
         aio read size = 1
         aio write size = 1
         map acl inherit = Yes
         hide files = /lost+found/
         follow symlinks = No
         dos filemode = Yes
         vfs objects = acl_xattr full_audit
         store dos attributes = Yes


[workplace]
       comment              = ICS - CSI mantis build and daily kits folder
       path                 = /export/ICS/CSI/workplace
       valid users          = @"domainusers"
       force create mode    = 750
       force directory mode = 740
       writeable            = Yes
       browseable           = Yes

[labadmins]
       comment              = ICS - CSI Admins Share
       path                 = /export/ICS/CSI/labadmins
       valid users          = @smbLabAdmins
       force create mode    = 750
       force directory mode = 740
       writeable            = Yes
       browseable           = Yes


# Global parameters
[global]
         workgroup = CCDC
         realm = CCDC.LAN
         netbios name = CCDC-SAMBA4-DC1
         server role = active directory domain controller
         idmap_ldb:use rfc2307 = yes

         server services = -winbindd +winbind
         dns forwarder = 9.0.138.50

         tls enabled  = yes
         tls keyfile  = tls/myKey.pem
         tls certfile = tls/myCert.pem
         tls cafile   
[netlogon]
         path = /var/lib/samba/sysvol/ccdc.lan/scripts
         read only = No

[sysvol]
         path = /var/lib/samba/sysvol
         read only = No

I would also recommend Installing the 'acl' & 'attr'
packages (if not
already installed), read up on using POSIX ACLs and lose the 'force' 
lines in the member server conf and use POSIX ACLs instead.

Rowland

Mario Pio Russo

2015-Sep-01 13:24 UTC

head link

[Samba] on linux samba file shares, groups and user are randomlly lost. Using samba4 as Domain controller

Great thanks, I'll test your config files now!

some questions before:
> I would also recommend Installing the 'acl' & 'attr'
packages (if notalready installed),

those are installed and at the latest version on the file share server, are
they needed on the AD too (I would think no)?

> read up on using POSIX ACLs and lose the 'force'  lines in the
memberserver conf and use POSIX ACLs instead.

Sorry but I don't get this, what do you mean? some parameters in the
smb.conf to seutp? thanks!
___________________________________________________________________________________________

Mario Pio Russo, System Admin SWG IT Services Dublin, Phone & FAX: +353 1
815 2236, eMail: mariopiorusso at ie.ibm.com
IBM Ireland Product Distribution Limited registered in Ireland with number
92815. Registered Office: IBM House, Shelbourne Road, Ballsbridge, Dublin 4

(Embedded image moved to file: pic32058.gif)



From:	Rowland Penny <rowlandpenny241155 at gmail.com>
To:	samba at lists.samba.org
Date:	01/09/2015 13:54
Subject:	Re: [Samba] on linux samba file shares, groups and user are
            randomlly lost. Using samba4 as Domain controller
Sent by:	"samba" <samba-bounces at lists.samba.org>



On 01/09/15 12:04, Mario Pio Russo wrote:>
> Good day All
>
> I am re proposing this topic as it keeps happening in our enviroment and
is> creating some trouble now.
>
> I have 1 samba file share server, and a different samba4 AD server.
>
> the file server has been recently updated to Ubuntu 14 and its native
samba> 4.1.6. The samba4 AD is on Ubuntu 14 and on sernet-samba 4.2.2.
>
> what happens is that every 4~5 days the file share server loses randomly
> the groups/users associations. when doing ls on the shares, I do not see
> the domain users / groups but I just see their uid. when I try to access
> those shares, it gives permission denied. The only option is to reboot
the> file server. after reboot all comes back to normal. I can see the
> user/groups when "ls" and I can access mount the shares. but
after a
while> all comes back again. Note that when the system is not working, getent
> group does not show anything, but wbinfo -g shows the groups correctlly.
On> the AD, I have disabled the winbindd and I am using the original winbind.
>
> Here is the  2 smb.conf files (Note, i have cut off most of the shares )
>
> Samba file share:
>
> [global]
>          workgroup = CCDC
>          realm = CCDC.LAN
>          server string = CSI Samba Server
>          server role = member server
>          security = ADS
>          map untrusted to domain = Yes
>          syslog = 0
>          log file = /var/log/samba/log.%m
>          max log size = 2000
>          #smb ports = 139
>          name resolve order = wins, host, bcast
>          server signing = required
>          socket options = SO_RCVBUF=262144 SO_SNDBUF=262144 SO_KEEPALIVE
> IPTOS_LOWDELAY TCP_NODELAY
>          load printers = No
>          disable spoolss = Yes
>          local master = No
>          domain master = No
>          dns proxy = No
>          wins server = 9.161.96.220
>          template homedir = /home/winbind
>          winbind cache time = 15
>          winbind enum users = Yes
>          winbind enum groups = Yes
>          winbind use default domain = Yes
>          idmap config * : range = 10000-20000
>          full_audit:priority = NOTICE
>          full_audit:facility = local7
>          full_audit:failure = mkdir rename unlink rmdir open chown chmod
> connect readlink
>          full_audit:prefix = %u,%I,%m,%S
>          idmap config * : backend = tdb
>          invalid users = root, daemon, bin, sys, sync, games, man, lp,
mail,> news, uucp, proxy, www-data, backup, list, irc, g
> nats, Debian-exim, sshd, ntpd
>          acl group control = Yes
>          aio read size = 1
>          aio write size = 1
>          map acl inherit = Yes
>          hide files = /lost+found/
>          follow symlinks = No
>          dos filemode = Yes
>          vfs objects = full_audit
>
> [workplace]
>        comment              = ICS - CSI mantis build and daily kits
folder>        path                 = /export/ICS/CSI/workplace
>        valid users          = @"domainusers"
>        force create mode    = 750
>        force directory mode = 740
>        writeable            = Yes
>        browseable           = Yes
>
> [labadmins]
>        comment              = ICS - CSI Admins Share
>        path                 = /export/ICS/CSI/labadmins
>        valid users          = @smbLabAdmins
>        force create mode    = 750
>        force directory mode = 740
>        writeable            = Yes
>        browseable           = Yes
>
>
>
>
> samba AD :
>
> # Global parameters
> [global]
>          workgroup = CCDC
>          realm = CCDC.LAN
>          netbios name = CCDC-SAMBA4-DC1
>          server role = active directory domain controller
>          idmap_ldb:use rfc2307 = yes
>
>          server services = -winbindd +winbind
>          dns forwarder = 9.0.138.50
>          #server services = -winbindd +winbind
>          idmap config CCDC:backend = ad
>          idmap config CCDC:schema_mode = rfc2307
>          idmap config CCDC:range = 10000-40000
>
>
>          # Store UIDs/GIDs for all other domains (including local
>          # accounts/groups of this server) in a tdb file
>          idmap config *:backend = tdb
>          idmap config *:range = 2000-9999
>
>          # Use home directory and shell information from AD
>          winbind nss info = rfc2307
>
>          tls enabled  = yes
>          tls keyfile  = tls/myKey.pem
>          tls certfile = tls/myCert.pem
>          tls cafile   >
> [netlogon]
>          path = /var/lib/samba/sysvol/ccdc.lan/scripts
>          read only = No
>
> [sysvol]
>          path = /var/lib/samba/sysvol
>          read only = No
>
>
>
> Funny thing is that I can't find anything relevant in the logs of the
file> share server.
>
> Any help is really appreciated.
>
> Thank you
>
>___________________________________________________________________________________________
>
> Mario Pio Russo, System Admin SWG IT Services Dublin, Phone & FAX: +353
1
> 815 2236, eMail: mariopiorusso at ie.ibm.com
> IBM Ireland Product Distribution Limited registered in Ireland with
number> 92815. Registered Office: IBM House, Shelbourne Road, Ballsbridge, Dublin
4>
> (Embedded image moved to file: pic39243.gif)
OK, I recommend you change your smb.conf files to these:

[global]
         workgroup = CCDC
         realm = CCDC.LAN
         security = ADS
         dedicated keytab file = /etc/krb5.keytab
         kerberos method = secrets and keytab
         server string = CSI Samba Server
         winbind enum users = Yes
         winbind enum groups = Yes
         winbind use default domain = Yes
         winbind cache time = 15
         winbind refresh tickets = Yes
         idmap config * : backend = tdb
         idmap config * : range = 2000-9999
         idmap config CCDC : backend = rid
         idmap config CCDC : range = 10000-20000
         map untrusted to domain = Yes
         syslog = 0
         log file = /var/log/samba/log.%m
         max log size = 2000
         #smb ports = 139
         name resolve order = wins, host, bcast
         server signing = required
         load printers = No
         disable spoolss = Yes
         local master = No
         domain master = No
         dns proxy = No
         wins server = 9.161.96.220
         template homedir = /home/winbind
         full_audit:priority = NOTICE
         full_audit:facility = local7
         full_audit:failure = mkdir rename unlink rmdir open chown chmod
connect readlink
         full_audit:prefix = %u,%I,%m,%S
         invalid users = root, daemon, bin, sys, sync, games, man, lp,
mail,news, uucp, proxy, www-data, backup, list, irc, gnats, Debian-exim,
sshd, ntpd
         acl group control = Yes
         aio read size = 1
         aio write size = 1
         map acl inherit = Yes
         hide files = /lost+found/
         follow symlinks = No
         dos filemode = Yes
         vfs objects = acl_xattr full_audit
         store dos attributes = Yes


[workplace]
       comment              = ICS - CSI mantis build and daily kits folder
       path                 = /export/ICS/CSI/workplace
       valid users          = @"domainusers"
       force create mode    = 750
       force directory mode = 740
       writeable            = Yes
       browseable           = Yes

[labadmins]
       comment              = ICS - CSI Admins Share
       path                 = /export/ICS/CSI/labadmins
       valid users          = @smbLabAdmins
       force create mode    = 750
       force directory mode = 740
       writeable            = Yes
       browseable           = Yes


# Global parameters
[global]
         workgroup = CCDC
         realm = CCDC.LAN
         netbios name = CCDC-SAMBA4-DC1
         server role = active directory domain controller
         idmap_ldb:use rfc2307 = yes

         server services = -winbindd +winbind
         dns forwarder = 9.0.138.50

         tls enabled  = yes
         tls keyfile  = tls/myKey.pem
         tls certfile = tls/myCert.pem
         tls cafile   
[netlogon]
         path = /var/lib/samba/sysvol/ccdc.lan/scripts
         read only = No

[sysvol]
         path = /var/lib/samba/sysvol
         read only = No

I would also recommend Installing the 'acl' & 'attr'
packages (if not
already installed), read up on using POSIX ACLs and lose the 'force'
lines in the member server conf and use POSIX ACLs instead.

Rowland


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