Thanks for posting this script - it will be very helpful !

-Kevin C.

Is a good practice to check, repair and backup database every night. In linux you can make a bash script like this:

# Check_db.sh
#
# Check, repair and backup netxms database in remote host
#
### Variables ###
date=`date +%d-%m-%Y`
DateTimeStamp="date +%d/%m/%Y-%H:%M:%S"
# Paths
logfile="/var/log/mysql_backup.log"
tempbackdir="/tmp"
remotebackdir="/datos/backup/mysql_netxms_pro"
sourcedir="/var/lib/mysql"

### Check and repair data base ###
### First stop netxms agent and server, and then repair netxms data base using nxdbmgr
/usr/bin/killall nxagentd >> $logfile
/usr/bin/killall netxmsd >> $logfile
/usr/local/bin/nxdbmgr -f check >> $logfile
sleep 60
### Repair all mysql database (-Avrs parametres can be different depending on mysql version)
echo "#################################################" >> $logfile
echo `$DateTimeStamp` - All processes have been stopped. Analysis and repair MySQL DB started: >> $logfile
/usr/bin/mysqlcheck -Avrs -uroot -pxxxxxxxxx >> $logfile

### Backup databases locally whit compression ###
### Stop mysqld deamon
/sbin/service mysqld stop
sleep 60
### Compress with tar command
echo `$DateTimeStamp` - MySQL databases backup started: >> $logfile
tar -pcjvf $tempbackdir/mysql_backup-$date.tar.bz2 $sourcedir/ ### >> $logfile
tar -tjvf $backdir/mysql_backup-$date.tar.bz2 $sourcedir/ ### >> $logfile
sleep 60
/sbin/service mysqld start >> $logfile
/usr/local/bin/netxmsd -d >> $logfile
/usr/local/bin/nxagentd -d >> $logfile
echo `$DateTimeStamp` - MySQL databases backup completed. All netxms processes have been started >> $logfile

### Move local backup to remote server # # #
### Note that the remote server must contain the server's public key (generated with the
###“ssh-keygen-t rsa” command) from which you send the backup in
###“$HOME/.ssh/authorized_keys” file
scp $tempbackdir/mysql_backup-$date.tar.bz2 root@10.12.xxx.xxx:$remotebackdir >> $logfile
echo `$DateTimeStamp` - Local backup has been moved to remote server >> $logfile

### Remove daily backups over 32 days old on the remote server ###
ssh root@10.12.xxx.xxx find $remotebackdir/ -name '*.tar.bz2' -type f -mtime +32 -exec "rm -f {} \;" >> $logfile
echo `$DateTimeStamp` - Remote backups over 32 days old have been removed >> $logfile
echo "###" >> $logfile
echo "###" >> $logfile

exit 0

Finally you must assign the appropriate permissions to the script and then schedule it in crontab:

00 3 * * * /usr/local/scripts/Check_db.sh

Best regards.

That appears to have fixed it:

NetXMS Database Manager Version 1.2.5

Checking database (excluding collected data):
* Checking zone objects...                                            [PASSED]
Unlinked node object 31895 ("x") can be linked to subnet 93 (x.x.x.x). Link? (Y/N) Y
Unlinked node object 31963 ("x") can be linked to subnet 93 (x.x.x.x). Link? (Y/N) Y
Unlinked node object 62336 ("x") can be linked to subnet 9262 (x.x.x.x). Link? (Y/N) Y
* Checking node objects...                                            [FIXED ]
Unlinked interface object 36721 ("x"). Delete it? (Y/N) Y
Unlinked interface object 36722 ("x"). Delete it? (Y/N) Y
* Checking interface objects...                                       [FIXED ]
* Checking network service objects...                                 [PASSED]
* Checking cluster objects...                                         [PASSED]
* Checking template to node mapping...                                [PASSED]
* Checking object properties...                                       [PASSED]
* Checking event processing policy...                                 [PASSED]
5 errors was found, 5 errors was corrected
All errors in database was fixed
Commit changes? (Y/N) Y
Committing changes...
Changes was successfully committed to database
Database check completed

(Note: I removed hostnames/IPs)

After starting the server again and removing those nodes again, they were gone from the database and a subsequent nxdbmgr check didn't find any issues.

Thanks!

Looks like some problem with node deletion. Can you try to stop NetXMS server and run nxdbmgr check? If node is really node bound to any subnet or container, it should be detected and deleted.

Best regards,
Victor