Zabbix agent on Zabbix server is unreachable for 5 minutes

[bluemind2005]

Hello Zabbix Community Support,

I just did installed of Zabbix Server along with agent (on CentOS7) and another Zabbix agent installation on another machine(on CentOS 7).

After few mins, I started getting this alert message on Zabbix server:
Zabbix agent on Zabbix server is unreachable for 5 minutes

On Zabbix Server:
zabbix_agentd.conf:Server=192.168.1.12
zabbix_agentd.conf:### Option: ServerActive
zabbix_agentd.conf:# Example: ServerActive=127.0.0.1:20051,zabbix.domain,[::1]:30051,::1,[12fc::1]
zabbix_agentd.conf:# ServerActive=
zabbix_agentd.conf:ServerActive=192.168.1.12


On Client machine
Server=192.168.1.12
### Option: ServerActive
# Example: ServerActive=127.0.0.1:20051,zabbix.domain,[::1]:30051,::1,[12fc::1]
# ServerActive=
ServerActive=192.168.1.12


On Zabbix server:
[email protected] /etc/zabbix> nmap vm1.master

Starting Nmap 6.40 ( http://nmap.org ) at 2017-04-02 01:19 AEDT
Nmap scan report for vm1.master (192.168.1.12)
Host is up (0.00089s latency).
rDNS record for 192.168.1.12: 192-168-1-12.tpgi.com.au
Not shown: 996 closed ports
PORT STATE SERVICE
22/tcp open ssh
80/tcp open http
111/tcp open rpcbind
3306/tcp open mysql

Nmap done: 1 IP address (1 host up) scanned in 0.29 seconds
[email protected] /etc/zabbix>
[email protected] /etc/zabbix> sudo systemctl status zabbix-agent
● zabbix-agent.service - Zabbix Agent
Loaded: loaded (/usr/lib/systemd/system/zabbix-agent.service; disabled; vendor preset: disabled)
Active: active (running) since Sun 2017-04-02 01:06:03 AEDT; 13min ago
Process: 3076 ExecStart=/usr/sbin/zabbix_agentd -c $CONFFILE (code=exited, status=0/SUCCESS)
Main PID: 3078 (zabbix_agentd)
CGroup: /system.slice/zabbix-agent.service
├─3078 /usr/sbin/zabbix_agentd -c /etc/zabbix/zabbix_agentd.conf
├─3079 /usr/sbin/zabbix_agentd: collector [idle 1 sec]
├─3080 /usr/sbin/zabbix_agentd: listener #1 [waiting for connection]
├─3081 /usr/sbin/zabbix_agentd: listener #2 [waiting for connection]
├─3082 /usr/sbin/zabbix_agentd: listener #3 [waiting for connection]
└─3083 /usr/sbin/zabbix_agentd: active checks #1 [idle 1 sec]

Apr 02 01:06:03 vm1.master systemd[1]: Starting Zabbix Agent...
Apr 02 01:06:03 vm1.master systemd[1]: PID file /run/zabbix/zabbix_agentd.pid not readable (yet?) after start.
Apr 02 01:06:03 vm1.master systemd[1]: Started Zabbix Agent.
[email protected] /etc/zabbix> sudo systemctl status zabbix-server
● zabbix-server.service - Zabbix Server
Loaded: loaded (/usr/lib/systemd/system/zabbix-server.service; enabled; vendor preset: disabled)
Active: active (running) since Sun 2017-04-02 00:58:47 AEDT; 21min ago
Process: 981 ExecStart=/usr/sbin/zabbix_server -c $CONFFILE (code=exited, status=0/SUCCESS)
Main PID: 1031 (zabbix_server)
CGroup: /system.slice/zabbix-server.service
├─1031 /usr/sbin/zabbix_server -c /etc/zabbix/zabbix_server.conf
├─2783 /usr/sbin/zabbix_server: configuration syncer [synced configuration in 0.016926 sec, idle 60 sec]
├─2784 /usr/sbin/zabbix_server: db watchdog [synced alerts config in 0.000822 sec, idle 60 sec]
├─2785 /usr/sbin/zabbix_server: poller #1 [got 0 values in 0.000005 sec, idle 1 sec]
├─2786 /usr/sbin/zabbix_server: poller #2 [got 1 values in 0.000081 sec, idle 1 sec]
├─2787 /usr/sbin/zabbix_server: poller #3 [got 0 values in 0.000005 sec, idle 1 sec]
├─2788 /usr/sbin/zabbix_server: poller #4 [got 0 values in 0.000000 sec, idle 1 sec]
├─2789 /usr/sbin/zabbix_server: poller #5 [got 0 values in 0.000006 sec, idle 1 sec]
├─2790 /usr/sbin/zabbix_server: unreachable poller #1 [got 0 values in 0.000006 sec, idle 5 sec]
├─2791 /usr/sbin/zabbix_server: trapper #1 [processed data in 0.000004 sec, waiting for connection]
├─2792 /usr/sbin/zabbix_server: trapper #2 [processed data in 0.000000 sec, waiting for connection]
├─2793 /usr/sbin/zabbix_server: trapper #3 [processed data in 0.000007 sec, waiting for connection]
├─2794 /usr/sbin/zabbix_server: trapper #4 [processed data in 0.000009 sec, waiting for connection]
├─2795 /usr/sbin/zabbix_server: trapper #5 [processed data in 0.000005 sec, waiting for connection]
├─2796 /usr/sbin/zabbix_server: icmp pinger #1 [got 0 values in 0.000005 sec, idle 5 sec]
├─2797 /usr/sbin/zabbix_server: alerter [sent alerts: 0 success, 0 fail in 0.000765 sec, idle 30 sec]
├─2798 /usr/sbin/zabbix_server: housekeeper [startup idle for 30 minutes]
├─2799 /usr/sbin/zabbix_server: timer #1 [processed 1 triggers, 0 events in 0.000476 sec, 0 maintenances in 0.000000 sec, idle 30 sec]
├─2800 /usr/sbin/zabbix_server: http poller #1 [got 0 values in 0.000801 sec, idle 5 sec]
├─2801 /usr/sbin/zabbix_server: discoverer #1 [processed 0 rules in 0.000712 sec, idle 60 sec]
├─2802 /usr/sbin/zabbix_server: history syncer #1 [synced 0 items in 0.000008 sec, idle 1 sec]
├─2803 /usr/sbin/zabbix_server: history syncer #2 [synced 0 items in 0.000364 sec, idle 1 sec]
├─2804 /usr/sbin/zabbix_server: history syncer #3 [synced 0 items in 0.000008 sec, idle 1 sec]
├─2805 /usr/sbin/zabbix_server: history syncer #4 [synced 1 items in 0.010995 sec, idle 1 sec]
├─2806 /usr/sbin/zabbix_server: escalator #1 [processed 0 escalations in 0.001419 sec, idle 3 sec]
├─2807 /usr/sbin/zabbix_server: proxy poller #1 [exchanged data with 0 proxies in 0.000018 sec, idle 5 sec]
└─2808 /usr/sbin/zabbix_server: self-monitoring [processed data in 0.000007 sec, idle 1 sec]

Apr 02 00:58:47 vm1.master systemd[1]: Starting Zabbix Server...
Apr 02 00:58:47 vm1.master systemd[1]: Started Zabbix Server.
[email protected] /etc/zabbix>

Any help to identify the issue and to resolve would be greatly appreciated.

Thanks and Regards,
Jim

[sergio.cricca]

What is the IP configured in the web interface for the host "Zabbix Server"?
Out of the box the IP is 127.0.0.1
You should change it to the one you configured in zabbix_agentd.conf

Bye

[bluemind2005]

Many Thanks ! It was 127.0.0.1. I changed to the correct IP 192.168.1.12 and restarted agent and server and we are all good.