zabbix-server.service - Zabbix Server
   Loaded: loaded (/lib/systemd/system/zabbix-server.service; disabled; vendor preset: enabled)
   Active: active (running) since Fri 2018-11-09 15:41:10 CET; 1s ago
  Process: 330 ExecStop=/bin/kill -SIGTERM $MAINPID (code=exited, status=1/FAILURE)
  Process: 335 ExecStart=/usr/sbin/zabbix_server -c $CONFFILE (code=exited, status=0/SUCCESS)
  ...

$ isql backend
> +---------------------------------------+
> | Connected!                            |
> |                                       |
> | sql-statement                         |
> | help [tablename]                      |
> | quit                                  |
> |                                       |
> +---------------------------------------+
>  SQL> select 1;
> +---------------------+
> | 1                   |
> +---------------------+
> | 1                   |
> +---------------------+
> SQLRowCount returns 1
> 1 rows fetched

[mysql]
Description = ODBC for MySQL
Driver = /usr/lib/x86_64-linux-gnu/odbc/libmyodbc8w.so
Setup = /usr/lib/x86_64-linux-gnu/odbc/libmyodbc8S.so
FileUsage = 1

[ODBC Data Sources]
backend  = MySQL unicode backend DSN

[backend]
Driver = mysql
Decription = Connector/ODBC Driver to Backend DB
Server = localhost
Port = 3306
User = ???
Password = ???
Database = backend
OPTION = 3
SOCKET = /var/run/mysqld/mysqld.sock

...
2754:20181109:160050.744 10: /usr/sbin/zabbix_server: poller #2 [got 1 values in 0.000092 sec, getting values](zbx_odbc_connect+0x1ac) [0x55796a7ae97b]
...