(X) zabbix monitor the TCP state

1) agent side configuration

• agent-side scripting acquisition monitored item

#vim /etc/zabbix/zabbix_agentd.d/tcp_status.sh
#bin/bash 
[ $# -ne 1 ] && echo "Usage:CLOSE-WAIT|CLOSED|CLOSING|ESTAB|FIN-WAIT-1|FIN-WAIT-2|LAST-ACK|LISTEN|SYN-RECV SYN-SENT|TIME-WAIT" && exit 1
tcp_status_fun(){
    TCP_STAT=$1
    ss -ant | awk 'NR>1 {++s[$1]} END {for(k in s) print k,s[k]}' > /tmp/ss.txt
    TCP_STAT_VALUE=$(grep "$TCP_STAT" /tmp/ss.txt | cut -d ' ' -f2)
    if [ -z "$TCP_STAT_VALUE" ];then
        TCP_STAT_VALUE=0
    fi
    echo $TCP_STAT_VALUE
}
tcp_status_fun $1;

•   修改脚本权限

#chmod +x /etc/zabbix/zabbix_agentd.d/tcp_status.sh

• Modify agent profiles

#vim /etc/zabbix/zabbix_agentd.d/tcp_status.conf
UserParameter=tcp_status[*],/bin/bash /etc/zabbix/zabbix_agentd.d/tcp_status.sh "$1"

• agentd restart the service

systemctl restart zabbix-agent

Note: The owner /tmp/ss.txt file is zabbix

(2) server side configuration

Ideas: define tcp_status template ---> defined set of applications nginx_status ---> defined monitoring item ----> custom graphics ---> define the trigger ----> add a host or hosts associated with this template

• zabbix-server end of the test obtain zabbix_get

# zabbix_get -s 192.168.1.32 -p10050 -k tcp_status[ESTAB]
2

• The key

tcp_status[ESTAB]
tcp_status[CLOSE-WAIT]
tcp_status[CLOSED]
tcp_status[CLOSING]
tcp_status[FIN-WAIT-1]
tcp_status[FIN-WAIT-2]
tcp_status[LAST-ACK]
tcp_status[LISTEN]
tcp_status[SYN-RECV]
tcp_status[SYN-SENT]
tcp_status[TIME-WAIT]

• Defined monitoring item: write only one, the other is a different key
  
• Custom Graphics
  
• verification