Zabbix server cannot connect to agent

[ShadowMonster]

I have zabbix server in my home server and I want monitor other server fair away (other continent) - well server work good with his local agent etc. I install agent only on remote Linux server but zabbix server all time cannot connect I get message:

Get value from agent failed: cannot connect to [[my_server_hostname]:10050]: [22] Invalid argument

It's not fail of firewall or something I can telnet 10050 from server and 10051 from agent side.

Zabbix server logs show me same thing I check yet agent log and it show me:

22293:20120923:211802.372 Sleeping for 1 second(s)
22289:20120923:211802.469 In update_cpustats()
22289:20120923:211802.469 End of update_cpustats()
22293:20120923:211803.372 In send_buffer() host:'my_server_dns_hostname' port:10051 values:0/100
22293:20120923:211803.372 End of send_buffer():SUCCEED

Seams all fine but it still show me this error. Can someone tell what what can be wrong.

this value 0/100 is all time same like it repeat I think with ping from zabbix server it should not be random or something like wrote in zabbix protocol?

[mbsit]

Hi
First try to get value from agent using: zabbix_get tool - localy
Log in to remote server and try to:

zabbix_get -s localhost -p 10050 -k agent.ping

After that try to do it remotely from Zabbix server.

zabbix_get -s IP_OF_REMOTE_AGENT -p 10050 -k agent.ping

Bests,
Grzegorz

--
Wdrożenia Zabbix - Warszawa

https://www.mbs-it.pl

[ShadowMonster]

Dzięki Grzegorzu za odpowiedź.

Well I check it in both cases it show just number 1 (any time when I try) - so I think it mean that it work correctly.

Just maybe more info about my server. It is in my home network where I have dynamic IP so to connect I use DNS instead of IP because of dynDNS service (freedns.afraid.org).

I think maybe it is more problem with network or server setting - when I telnet server from my remote one by telnet my_ip 10051 then I got connection but it freeze on Escape character - it do not disconnect but maybe this protocol is that.

Is there any tool to test connection from agent?

[mbsit]

YES
The name is zabbix_sender

Send any value to any host, you should type smth like:

zabbix_sender -z SERVER_IP -s HOSTNAME -k KEY -o VALUE -vv

only SERVER_IP should be correct.

and then response like this:

zabbix_sender [3469]: DEBUG: answer [{
"response":"success",
"info":"Processed 0 Failed 1 Total 1 Seconds spent 0.000081"}]
info from server: "Processed 0 Failed 1 Total 1 Seconds spent 0.000081"
sent: 1; skipped: 0; total: 1

It means - you connected.

I pozdrawiam

Bests,
Grzegorz

[ShadowMonster]

Well I check it and I got:

zabbix_sender [6588]: DEBUG: answer [{
"response":"success",
"info":"Processed 0 Failed 1 Total 1 Seconds spent 0.000041"}]
info from server: "Processed 0 Failed 1 Total 1 Seconds spent 0.000041"
sent: 1; skipped: 0; total: 1

So all seams fine but I still have this connection error on my front end

Is zabbix use also some other ports? I forgot mention that my ISP is blocking all standard ports but 10050 and 10051 are not but maybe he use some other ones? zabbix do not use UDP?

Pozdrawiam

[mbsit]

So, we check communication. All is OK.

Temporary change the host configuration to use IP not DNS name.
Agent works in active or Passive mode.
If active, check the HOSTNAME in zabbix_agentd.conf and in Frontend (twice)

Standard port doesn't matter, Zabbix use only 10050/10051 TCP.

Bests,
Grzegorz

--
Wdrożenia Zabbix - Warszawa

https://www.mbs-it.pl

[ShadowMonster]

LOL I found it!

Problem was on server side configuration - SourceIP set - I had localhost when I change it on server DNS it start working.

Thank You very much Greg for support - it point me in correct direction. I would happy buy you a beer but I'm in Sao Paulo now

Please can you look in this topic yet: http://www.zabbix.com/forum/showthread.php?t=29860

I just need some simple suggestion.

Thanks & Regards
Martin