The newly installed Zabbix Agent on the node machine cannot be started today.

1. Check the Zabbix Agent log file to find out the reason.

 # cat /var/log/zabbix/zabbix_agentd.log 63133:20170601:092700.920 ************************** 63133:20170601:092700.920 using configuration file: /etc/zabbix/zabbix_agentd.conf 63133:20170601:092700.920 cannot set resource limit: [13] Permission denied 63133:20170601:092700.920 cannot disable core dump, exiting... 63137:20170601:092711.171 Starting Zabbix Agent [cong171163].  Zabbix 3.2.6 (revision 67849). 63137:20170601:092711.171 **** Enabled features **** 63137:20170601:092711.171 IPv6 support: YES 63137:20170601:092711.171 TLS support: YES 63137:20170601:092711.171 ************************** ......

2. At this time, you only need to turn off Selinux. There are two schemes;

2.1. Temporary closing

 # setenforce 0

2.2. Permanent shutdown (reboot host)

 # vim /etc/selinux/config SELINUX=enforcing

change

 SELINUX=disabled

3. After the operation is completed, start the zabbix agent service again

# systemctl start zabbix-agent.service

4. View ports

 # ss -tnl State Recv-Q Send-Q Local Address:Port Peer Address:Port  LISTEN 0 128 *:22 *:* LISTEN 0 100 127.0.0.1:25 *:*  LISTEN 0 128 *:10050 *:* LISTEN 0 80 :::3306 :::* LISTEN 0 128 :::22 :::* LISTEN 0 100 ::1:25 :::* LISTEN 0 128 :::10050 :::*

Zabbix agent starts successfully, and port 10050 is running.