NethServer Version: 7.9.2009
Module: nethserver-backup-config
Fails at command “/etc/e-smith/events/pre-backup-config/S40nethserver-dc-pre-backup”
Failed to insert into /var/lib/samba/private/sam.ldb.d/DC=DOMAINDNSZONES,DC=MYDOMAIN,DC=LAN.ldb.bak.tmp
failed to copy /var/lib/samba/private/sam.ldb.d/DC=DOMAINDNSZONES,DC=MYDOMAIN,DC=LAN.ldb
The /var/lib/samba/private/sam.ldb.d, I tried creating it and no difference
Did you already update to the most recent nethserver-backup-config 2.5.3?
Yes, 2.5.3-1.ns7
I can’t reproduce it. Maybe a permission issue as it’s not possible to insert or copy?
This is the code in nethserver-dc-pre-backup:
cd /var/lib/machines/nsdc/
nsdc-run -e -- tdbbackup $(find var/lib/samba/ -name "*.[t,l]db" | sed -e '\|^var/lib/samba/private/netlogon_creds_cli.tdb$| d ; s/^/\//')
It just does a tdbbackup in the container, see also Using the samba backup script - SambaWiki
Check howto:useful_commands [NethServer Wiki] for more information about how to work in the samba container.
I think it’s /var/lib/samba/private/sam.ldb.d in the NethServer DC container so please check /var/lib/machines/nsdc/var/lib/samba/private/sam.ldb.d, here’s an example of my server:
[root@server2 ~]# ls -l /var/lib/machines/nsdc/var/lib/samba/private/sam.ldb.d/
total 57132
-rw------- 1 root root 18923520 Oct 8 22:30 CN=CONFIGURATION,DC=AD,DC=MRMARKUZ,DC=DOMAIN,DC=EU.ldb
-rw------- 1 root root 21942272 Oct 8 22:30 CN=SCHEMA,CN=CONFIGURATION,DC=AD,DC=MRMARKUZ,DC=DOMAIN,DC=EU.ldb
-rw------- 1 root root 6750208 Dec 3 18:26 DC=AD,DC=MRMARKUZ,DC=DOMAIN,DC=EU.ldb
-rw------- 1 root root 6737920 Nov 28 10:57 DC=DOMAINDNSZONES,DC=AD,DC=MRMARKUZ,DC=DOMAIN,DC=EU.ldb
-rw------- 1 root root 3317760 Nov 28 10:57 DC=FORESTDNSZONES,DC=AD,DC=MRMARKUZ,DC=DOMAIN,DC=EU.ldb
-rw-r----- 1 root root 831488 Dec 2 13:07 metadata.tdb
EDIT:
Did you already test the config backup on command line:
backup-config
Yes, my /var/lib/machines/nsdc/var/lib/samba/private/sam.ldb.d contains the same files as yours.
And yes, “backup-config” results in;
===== Report for configuration backup =====
Backup started at 2022-12-03 13:23:39
Event pre-backup-config: FAIL
Backup status: FAIL
What’s your DC samba version?
nsdc-run -e -- samba -V
Please also check /var/log/messages for errors.
Version 4.9.18
/var/log/messages contains the following errors when runing “backup-config”
Dec 3 13:45:59 lrtserv-data esmith::event[24210]: Event: pre-backup-config
Dec 3 13:46:00 lrtserv-data esmith::event[24210]: expanding /etc/backup-config.d/nethserver-sssd.include
Dec 3 13:46:00 lrtserv-data esmith::event[24210]: Action: /etc/e-smith/events/actions/generic_template_expand SUCCESS [0.132487]
Dec 3 13:46:01 lrtserv-data esmith::event[24210]: Failed to insert into /var/lib/samba/private/sam.ldb.d/DC=DOMAINDNSZONES,DC=MYDOMAIN,DC=LAN.ldb.bak.tmp
Dec 3 13:46:01 lrtserv-data esmith::event[24210]: failed to copy /var/lib/samba/private/sam.ldb.d/DC=DOMAINDNSZONES,DC=MYDOMAIN,DC=LAN.ldb
Dec 3 13:46:01 lrtserv-data esmith::event[24210]: Action: /etc/e-smith/events/pre-backup-config/S40nethserver-dc-pre-backup FAILED: 1 [0.89886]
Dec 3 13:46:01 lrtserv-data esmith::event[24210]: Action: /etc/e-smith/events/pre-backup-config/S40nethserver-mail-shrmbx-cfgbackup SUCCESS [0.012343]
Dec 3 13:46:01 lrtserv-data esmith::event[24210]: Action: /etc/e-smith/events/pre-backup-config/S40nethserver-sssd-backup-tdb SUCCESS [0.010848]
Dec 3 13:46:02 lrtserv-data esmith::event[24210]: Action: /etc/e-smith/events/pre-backup-config/S50nethserver-backup-config-list-packages SUCCESS [1.639033]
Dec 3 13:46:02 lrtserv-data esmith::event[24210]: Event: pre-backup-config FAILED
That’s still the old version, are you sure you have updated to nethserver-dc-1.9.1-1?
I have not updated nethserver-dc, as if I do, it deletes all of my users and groups.
I reverted my VM and have tried a couple of times to update, always deletes the users and groups.
I was going to try and do a config backup, then update nethserver-dc and then restore, and that is when I noticed it was not working.
I opened a seperate issue for nethserver-dc udpate here;
Just if you missed it (like I did), take into account that it’s reporting a path inside the container (that means you have to look for it using nsdc-run command, systemd-run -M nsdc -t /bin/bash or at /var/lib/machines/nsdc/var/lib/samba/private/sam.ldb.d/...).
EDIT: nevermind, I see Markus already reported the same.
What happens after running (check for your *.ldb.bak and logs):
/etc/e-smith/events/actions/nethserver-dc-pre-backup
or from inside nsdc (systemd-run -M nsdc -t /bin/bash):
tdbbackup $(find var/lib/samba/ -name "*.[t,l]db" | sed -e '\|^var/lib/samba/private/netlogon_creds_cli.tdb$| d ; s/^/\//')
EDIT: nevermind, I see Markus bit me to it and today I’ve lack of attention. 
nethserver-backup-config fixes an error with the new nethserver-dc so maybe you need to downgrade nethserver-backup-config to make it work with the old nethserver-dc.
yum downgrade nethserver-backup-config
Tried that, same errors.
Did you already try to restart NSDC or reconfigure nethserver-dc?
systemctl restart nsdc
signal-event nethserver-dc-update
I ran both those commands and no change.
inside nsdc container:
samba-tool dbcheck --cross-ncs
don’t know it this also checks for errors in that ldb database
I’m out of ideas.
Did you try the tdbbackup in the container to hopefully get more information about the error?
Are there custom template files in /etc/e-smith/templates-custom ?
Did you reboot the server?
there is an specific command to check ldb databases using tdbtool…
inside the nsdc container
tdbtool "/var/lib/samba/private/sam.ldb.d/[here your database].ldb" check
replace the path to the ldb file as necessary