/etc/nginx/conf.d/default.conf 
添加
location /ngx_status {
        stub_status on;
        access_log off;
        allow 127.0.0.1;
        deny all;
    }

curl http://127.0.0.1/ngx_status
Active connections: 362
server accepts handled requests
6823 6823 6821
Reading: 0 Writing: 362 Waiting: 0

第1列:
当前与http建立的连接数,包括等待的客户端连接:2

第2列:
接受的客户端连接总数目:20
处理的客户端连接总数目:20
客户端总的请求数目:50

第3列:
当前,nginx读请求连接
当前,nginx写响应返回给客户端
目前有多少空闲客户端请求连接

ngx_status.sh:
#!/bin/bash
# DateTime: 2015-10-25
# AUTHOR:凉白开
# WEBSITE: http://www.ttlsa.com
# Description:zabbix监控nginx性能以及进程状态
# Note:此脚本需要配置在被监控端,否则ping检测将会得到不符合预期的结果
 ‎

HOST="127.0.0.1"
PORT="80"

# 检测nginx进程是否存在
function ping {
    /sbin/pidof nginx | wc -l 
}
# 检测nginx性能
function active {
    /usr/bin/curl -s "http://$HOST:$PORT/ngx_status/" | grep 'Active' | awk '{print $NF}'
}
function reading {
    /usr/bin/curl -s "http://$HOST:$PORT/ngx_status/" | grep 'Reading' | awk '{print $2}'
}
function writing {
    /usr/bin/curl -s "http://$HOST:$PORT/ngx_status/" | grep 'Writing' | awk '{print $4}'
}
function waiting {
    /usr/bin/curl -s "http://$HOST:$PORT/ngx_status/" | grep 'Waiting' | awk '{print $6}'
}
function accepts {
    /usr/bin/curl -s "http://$HOST:$PORT/ngx_status/" | awk NR==3 | awk '{print $1}'
}
function handled {
    /usr/bin/curl -s "http://$HOST:$PORT/ngx_status/" | awk NR==3 | awk '{print $2}'
}
function requests {
    /usr/bin/curl -s "http://$HOST:$PORT/ngx_status/" | awk NR==3 | awk '{print $3}'
}
# 执行function
$1

#cat /usr/local/zabbix-3.0.0/etc/zabbix_agentd.conf | grep nginx
UserParameter=nginx.status[*],/usr/local/zabbix-3.0.0/scripts/ngx-status.sh $1

测试
# zabbix_get -s 10.10.1.121 -k 'nginx.status[accepts]'
9570756
#zabbix_get -s 10.10.1.121 -k 'nginx.status[ping]'
1

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