zabbix server + agent + modbus ->> not supported

[bricka]

Hello

I'm new in linux. Just installed fresh debian9 and zabbix.

Zabbix server log:
476:20180614:194412.792 using configuration file: /etc/zabbix/zabbix_server.conf
476:20180614:194412.820 loaded modules: libzbxmodbus.so
476:20180614:194428.400 server #0 started [main process] libzbxmodbus: loaded version: 0.7

Zabbix agent log:
436:20180614:194411.606 using configuration file: /etc/zabbix/zabbix_agentd.conf
436:20180614:194411.842 loaded modules: libzbxmodbus.so
436:20180614:194412.011 agent #0 started [main process] libzbxmodbus: loaded version: 0.7

At http://localhost/zabbix I've created new item with key: modbus_read[tcp://x.x.x.x:17122,0,1068,1]. The status of item is 'not supported'

I've did everything like here: https://github.com/v-zhuravlev/libzbxmodbus

Can someone help with that problem?

Thank's

[kernbug]

Hello

Can someone help with that problem?

Thank's

Hello

From the link above:

Any libmodbus error returned including CRC errors would lead to Unsupported Item in Zabbix, so minimizing 'Refresh unsupported items' parameter in Zabbix is recommended because CRC could be common in RS-485 env.

Testing Modbus connectivity is easy with modpoll command utility.
You may try to grab some modbus registers with it before you try to do it with Zabbix.
http://www.modbusdriver.com/modpoll.html

If using libzbxmodbus with Zabbix agent, you can also save time and test responses first with zabbix_get, for example:zabbix_get -s localhost -kmodbus_read["/dev/ttyS1 9600 N",9,0x1518,3,l,1,0]

[bricka]

If using libzbxmodbus with Zabbix agent, you can also save time and test responses first with zabbix_get, for example:zabbix_get -s localhost -kmodbus_read["/dev/ttyS1 9600 N",9,0x1518,3,l,1,0]

From windows PC I use modbus scanner. It work's. Sorry.. I'm new in linux...
where I need u put "zabbix_get -s... "? it's key or terminal?

If it's key... I've got error: Invalid key "zabbix_get -s localhost -kmodbus_read["/dev/ttyS1 9600 N",9,0x1518,3,l,1,0]" for item "test" on "test1": incorrect syntax near " -s localhost -kmodbus_read["/dev/ttyS1 9600 N",9, ...".

If it's in terminal: zabbix_get: command not found

[bricka]

P.S.:
I found that there is modbus_read_registers function. I found it here: https://github.com/v-zhuravlev/libzb...r/src/modbus.c

but... If I use modbus_read_registers[tcp://x.x.x.x:17122,0,1068,10] - there is info that shows: Check function (1,2,3,4) used
If I change to modbus_read_registers[tcp://x.x.x.x:17122,1068,10] - info shows: Invalid number of parameters.

So looks like modbus_read_registers work's.. but I'm doing something wrong

[kernbug]

where I need u put "zabbix_get -s... "? it's key or terminal?

Hi

Information about zabbix-get utlity https://www.zabbix.com/documentation...l/concepts/get
Looks like Item parameter "modbus_read_registers[tcp://x.x.x.x:17122,0,1068,10]" correct, so you can add this to monitoring.

[bricka]

There is no zabbix_get...

root@debian:/bin# ./zabbix_get modbus_read_registers[tcp://x.x.x.x:17122,0,1068,10]
bash: ./zabbix_get: No such file or directory

looks like instalation is ok:

root@debian:/# apt install zabbix-server-mysql zabbix-frontend-php zabbix-agent
Reading package lists... Done
Building dependency tree
Reading state information... Done
zabbix-agent is already the newest version (1:3.4.10-1+stretch).
zabbix-frontend-php is already the newest version (1:3.4.10-1+stretch).
zabbix-server-mysql is already the newest version (1:3.4.10-1+stretch).
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.

I cant find how to install zabbix_get:

root@debian:/bin# apt-get install zabbix_getReading package lists... Done
Building dependency tree
Reading state information... Done
E: Unable to locate package zabbix_get

[kernbug]

There is no zabbix_get...


looks like instalation is ok:



I cant find how to install zabbix_get:

Hi,

Package name: 'zabbix-get'

[bricka]

root@xxx# zabbix_get -s localhost -kmodbus_read["/dev/ttyS1 9600 N",9,0x1518,3,l,1,0]
ZBX_NOTSUPPORTED: Permission denied


Or I did something wrong again?

[kernbug]

root@xxx# zabbix_get -s localhost -kmodbus_read["/dev/ttyS1 9600 N",9,0x1518,3,l,1,0]
ZBX_NOTSUPPORTED: Permission denied

Hi,

Ok, we will postpone the configuration of the agent-server and check this particular key from the previously mentioned module:

zabbix_agentd -t modbus_read["/dev/ttyS1 9600 N",9,0x1518,3,l,1,0]

If you set up the modbus device correctly, the result should output the value from the device. Please, try and let me know.

[bricka]

root@xxx:~# zabbix_agentd -t modbus_read["/dev/ttyS1 9600 N",9,0x1518,3,l,1,0]
libzbxmodbus: loaded version: 0.7
modbus_read[/dev/ttyS1 9600 N,9,0x1518,3,l,1,0] [m|ZBX_NOTSUPPORTED] [Input/output error]


Finaly I've got modbus working. Now need to work on graphs..
Thank's.

Solved it by uninstalling debian and installing ubuntu. From ubuntu remove mariadb and add mysql.

[mahmutfaruk]

I get results for Modbus but I am not getting some results correctly. ı dont know how can ı write key. wrong results is in below.
I don't get negative results right. My value is -257 but my result 65535 modbus_read_registers[tcp://10.2.121.52:502,1, 44, 3, i,1,0] - VMS Comunitation State KEY Type of information : TEXT Type : SimpleCheck

[gjovano]

Try Type of information: Numeric (Unsign) or float if you have decimal point.