zabbix-agent unreachable for 5 minutes

[rewilliamscpro]

Hello, starting yesterday after a firewall issue I have been getting the following alarms.

Zabbix agent on server.example.com is unreachable for 5 minutes

My Zabbix server have been running for over 2 years and i have not seen this problem. It seems that the zabbix server believes that the agent is down. Once the alarm fails it immediately okays which is the weird thing. The correct ports are open between agents and zabbix server.


Zabbix Server zabbix_agentd.conf

egrep -v '^$|^#' /etc/zabbix/zabbix_agentd.conf

PidFile=/var/run/zabbix/zabbix_agentd.pid
LogFile=/var/log/zabbix/zabbix_agentd.log
LogFileSize=0
DebugLevel=4
Server=::ffff:127.0.0.1
ServerActive=server1.tpms
Hostname=server1.example
Timeout=15
Include=/etc/zabbix/zabbix_agentd.d/

Zabbix Server zabbix_server.conf

egrep -v '^$|^#' /etc/zabbix/zabbix_server.conf

LogFile=/var/log/zabbix/zabbix_server.log
LogFileSize=0
DebugLevel=4
PidFile=/var/run/zabbix/zabbix_server.pid
DBName=zabbix
DBUser=zabbix
DBSocket=/var/lib/mysql/mysql.sock
StartPollers=256
SNMPTrapperFile=/var/log/snmptt/snmptt.log
Timeout=15
AlertScriptsPath=/usr/lib/zabbix/alertscripts
ExternalScripts=/usr/lib/zabbix/externalscripts
DBHost=localhost
DBName=zabbix
DBUser=zabbix
DBPassword=secret

Zabbix client zabbix_agent.conf

egrep -v '^$|^#' /etc/zabbix/zabbix_agentd.conf

PidFile=/var/run/zabbix/zabbix_agentd.pid
LogFile=/var/log/zabbix/zabbix_agentd.log
LogFileSize=0
Server=10.10.10.10
ServerActive=10.10.10.10
Hostname=Zabbix server
Include=/etc/zabbix/zabbix_agentd.d/

[allexpetrov]

Hello,

Any errors in regarding this server in zabbix_server.log or in zabbix_agent.log on affected host ?

Does the agent collect metrics or no ? Does the agent is running , check it using

ps -aux | grep zabbix_agentd

Regards,
Alex!