Problems with Active Checks (DisableActive=0)

[torti-]

Hello all,
I have some problems, getting active checks to work. First of all, here ary my client and server config files:

Client

Server=server.hostname.tld
ServerPort=10051
Hostname=client
ListenPort=10050
ListenIP=127.0.0.1
StartAgents=5
RefreshActiveChecks=60
DisableActive=0
EnableRemoteCommands=1
DebugLevel=4
PidFile=/tmp/zabbix_agentd.pid
LogFile=/tmp/zabbix_agentd.log
Timeout=3

Server

Server=1
StartPollers=6
StartTrappers=5
ListenPort=10051
ListenIP=<server ip>
HousekeepingFrequency=1
SenderFrequency=30
DebugLevel=3
Timeout=5
PidFile=/tmp/zabbix_server.pid
LogFile=/tmp/zabbix_server.log
FpingLocation=/usr/sbin/fping
DBHost=localhost
DBName=zabbix
DBUser=zabbix
DBPassword=<password for database>

If I start the agent I get in the logs at the client:

 27974:20070318:192749 zabbix_agentd started. ZABBIX 1.3.3.
 27975:20070318:192749 zabbix_agentd collector started
 27976:20070318:192749 zabbix_agentd listener started
 27977:20070318:192749 zabbix_agentd listener started
 27978:20070318:192749 zabbix_agentd listener started
 27979:20070318:192749 zabbix_agentd active check started [server.hostname.tld:10051]
 27979:20070318:192749 In init_active_metrics()
 27979:20070318:192749 In refresh_metrics('server.hostname.tld',10051)
 27979:20070318:192749 get_active_checks('server.hostname.tld',10051)
 27979:20070318:192749 Sending [ZBX_GET_ACTIVE_CHECKS
<clients name>
]
 27979:20070318:192749 Before read
 27979:20070318:192749 In parse_list_of_checks('ZBXD')
 27979:20070318:192749 In disable_all_metrics()
 27979:20070318:192749 Parsed [ZBXD]
 27979:20070318:192749 In process_active_checks('server.hostname.tld',10051)
 27979:20070318:192749 In get_min_nextcheck()
 27979:20070318:192749 Sleeping for 60 seconds

Port 10051 is open at the server and accepting connections.
For testing purposes I have created an item 'system.localtime' as 'Zabbix agent (active)'.
The hostname in the client.conf is the same as the hostname used in the webinterface for the client.

In the webinterface you see the host as not responding (no wonder nat is blocking incomng connection attempts...):
client-hostname <clients hostname>.dyndns.org <clients ip> 10050 VPN-Server Monitored Not available Cannot connect to [ghar-sshtunnel] [Connection refused] Items : Triggers : Graphs

Does anyone have an idea whats wrong here? I'm a little clueless

[torti-]

Can anyone perhaps post a working client/server config for active checks?

[bbrendon]

My server is on defaults and accepts connections from active agents on port 10051.

Make sure you have the item set for active in your zabbix web configuration.

Also, "hostname" must be set on the agent config file to whatever the hostname is entered as on the server.

[torti-]

hm well, the server responds well, but somehow the client doesn't reply the values requested from the server:

-----------------------------pcap session---
ZBX_GET_ACTIVE_CHECKS
ariel
ZBXD
........system.cpu.load[,avg15]:20:0
ZBXD.........system.cpu.load[,avg1]:5:0
ZBXD.........system.cpu.load[,avg5]:10:0
ZBXD.........ZBX_EOF
--------------------------------------------

after this nothing gets transmitted.

in the client.conf

Hostname=ariel

[medic]

an active check is an "active check" for the agent. The agent itself decides, when it will send data back to the server .. so a "normal" "Agent Check" is doing what you are thinking about:

Agent Check:
Server: Request Item
Agent: Send Item
[..]
Server: Request Item
Agent: Send Item
[..]

Agent Check (Active):
Agent: Request Itemlist
Server: Send Itemlist
[...]
Agent: Send Item
[...]
Agent: Send Item
[...]
Agent: Send Item