Zabbix agent主动模式的实现

主动模式是由zabbix agent主动向zabbix server的10051端口发起TCP连接请求。因此主动模式下必须在zabbix agent配置文件中指定zabbix server的IP或者主机名（必须可以被解析为IP地址），在连接到zabbix server之前，zabbix agent是不知道自己要采集哪些数据以及间隔多久采集一次数据的，然后在连接到zabbix server以后获取到zabbix agent的监控项和数据采集间隔时间周期，然后再根据监控项采集数据并返回给zabbix server。在主动模式下不再需要zabbix server向zabbix agent发起连接请求，因此，主动模式在一定程度上可以减轻zabbix server打开的本地随机端口和进程数，在一定程度上可以减轻zabbix server的负载压力。

环境准备

四台机器：

zabbix_agent 5.0 被动模式（已安装） Zabbix_java_gateway 5.0 （已安装） 10.0.0.7

zabbix_server 5.0（已安装） 10.0.0.17

Tomcat-8.5（已安装） 10.0.0.27

zabbix_agent 5.0 主动模式 10.0.0.37

关闭防火墙和selinux

#关闭selinux
[[email protected] ~]#sed -i 's/SELINUX=enforcing/SELINUX=disabled/' /etc/selinux/config

#关闭防火墙
[[email protected] ~]#systemctl disable --now firewalld

#重启生效
[[email protected] ~]#reboot

1. 安装zabbix rpm源

[[email protected] ~]#rpm -Uvh https://mirrors.aliyun.com/zabbix/zabbix/5.0/rhel/7/x86_64/zabbix-release-5.0-1.el7.noarch.rpm
[[email protected] ~]#sed -i 's#http://repo.zabbix.com#https://mirrors.aliyun.com/zabbix#' /etc/yum.repos.d/zabbix.repo
[[email protected] ~]#yum clean all

2. 安装zabbix agent

[[email protected] ~]#yum install -y zabbix-agent

#编辑配置文件 /etc/yum.repos.d/zabbix.repo
[[email protected] ~]#vim /etc/yum.repos.d/zabbix.repo
[zabbix-frontend]
...
enabled=1
...

3. 修改zabbix agent配置文件

[[email protected] ~]#vim /etc/zabbix/zabbix_agentd.conf
Server=10.0.0.17  
ListenPort=10050
ListenIP=0.0.0.0
StartAgents=5  
ServerActive=10.0.0.17  #主动模式的zabbix server地址
Hostname=10.0.0.37
Timeout=30

[[email protected] ~]#grep "^[a-Z]" /etc/zabbix/zabbix_agentd.conf
PidFile=/var/run/zabbix/zabbix_agentd.pid
LogFile=/var/log/zabbix/zabbix_agentd.log
LogFileSize=0
Server=10.0.0.17
ListenPort=10050
ListenIP=0.0.0.0
StartAgents=5
ServerActive=10.0.0.17
Hostname=10.0.0.37
Timeout=30
Include=/etc/zabbix/zabbix_agentd.d/*.conf

4. 启动Zabbix agent进程

#启动Zabbix agent进程，并设置开机自启
[[email protected] ~]#systemctl restart zabbix-agent.service
[[email protected] ~]#systemctl enable zabbix-agent.service
[[email protected] ~]#systemctl status zabbix-agent.service
● zabbix-agent.service - Zabbix Agent
   Loaded: loaded (/usr/lib/systemd/system/zabbix-agent.service; enabled; vendor preset: disabled)
   Active: active (running) since Sat 2022-07-02 19:12:04 CST; 18s ago
 Main PID: 1755 (zabbix_agentd)
   CGroup: /system.slice/zabbix-agent.service
           ├─1755 /usr/sbin/zabbix_agentd -c /etc/zabbix/zabbix_agentd.conf
           ├─1756 /usr/sbin/zabbix_agentd: collector [idle 1 sec]
           ├─1757 /usr/sbin/zabbix_agentd: listener #1 [waiting for connection]
           ├─1758 /usr/sbin/zabbix_agentd: listener #2 [waiting for connection]
           ├─1759 /usr/sbin/zabbix_agentd: listener #3 [waiting for connection]
           ├─1760 /usr/sbin/zabbix_agentd: listener #4 [waiting for connection]
           ├─1761 /usr/sbin/zabbix_agentd: listener #5 [waiting for connection]
           └─1762 /usr/sbin/zabbix_agentd: active checks #1 [idle 1 sec]

Jul 02 19:12:04 centos7 systemd[1]: Starting Zabbix Agent...
Jul 02 19:12:04 centos7 systemd[1]: Started Zabbix Agent.

#验证Zabbix agent进程是否存在
[[email protected] ~]#ss -ntlp
State      Recv-Q Send-Q              Local Address:Port                             Peer Address:Port
LISTEN     0      128                             *:10050                                       *:*users:(("zabbix_agentd",pid=1762,fd=4),("zabbix_agentd",pid=1761,fd=4),("zabbix_agentd",pid=1760,fd=4),("zabbix_agentd",pid=1759,fd=4),("zabbix_agentd",pid=1758,fd=4),("zabbix_agentd",pid=1757,fd=4),("zabbix_agentd",pid=1756,fd=4),("zabbix_agentd",pid=1755,fd=4))
LISTEN     0      128                             *:22                                          *:*users:(("sshd",pid=1298,fd=3))
LISTEN     0      100                     127.0.0.1:25                                          *:*users:(("master",pid=1461,fd=13))
LISTEN     0      128                          [::]:22                                       [::]:*users:(("sshd",pid=1298,fd=4))
LISTEN     0      100                         [::1]:25                                       [::]:*users:(("master",pid=1461,fd=14))

[[email protected] ~]#ps -ef | grep zabbix_agentd
zabbix     1755      1  0 19:12 ?        00:00:00 /usr/sbin/zabbix_agentd -c /etc/zabbix/zabbix_agentd.conf
zabbix     1756   1755  0 19:12 ?        00:00:00 /usr/sbin/zabbix_agentd: collector [idle 1 sec]
zabbix     1757   1755  0 19:12 ?        00:00:00 /usr/sbin/zabbix_agentd: listener #1 [waiting for connection]
zabbix     1758   1755  0 19:12 ?        00:00:00 /usr/sbin/zabbix_agentd: listener #2 [waiting for connection]
zabbix     1759   1755  0 19:12 ?        00:00:00 /usr/sbin/zabbix_agentd: listener #3 [waiting for connection]
zabbix     1760   1755  0 19:12 ?        00:00:00 /usr/sbin/zabbix_agentd: listener #4 [waiting for connection]
zabbix     1761   1755  0 19:12 ?        00:00:00 /usr/sbin/zabbix_agentd: listener #5 [waiting for connection]
zabbix     1762   1755  0 19:12 ?        00:00:00 /usr/sbin/zabbix_agentd: active checks #1 [idle 1 sec]
root       1788   1565  0 19:14 pts/0    00:00:00 grep --color=auto zabbix_agentd

5. 生成主动模式模板

点击【配置-主机-10.0.0.7-web1-克隆】

6. 验证主动模式主机状态

#【ZBX】绿色，表示主机可用，监控指标检查已成功

7. 验证主动模式主机端口

[[email protected]_server ~]#netstat -tanlp | grep 10.0.0.37
tcp        0      0 10.0.0.17:10051         10.0.0.37:43072         TIME_WAIT   -
tcp        0      0 10.0.0.17:10051         10.0.0.37:43062         TIME_WAIT   -
tcp        0      0 10.0.0.17:10051         10.0.0.37:43070         TIME_WAIT   -
tcp        0      0 10.0.0.17:10051         10.0.0.37:43068         TIME_WAIT   -
tcp        0      0 10.0.0.17:10051         10.0.0.37:43066         TIME_WAIT   -
tcp        0      0 10.0.0.17:10051         10.0.0.37:43064         TIME_WAIT   -

8. 验证主动模式主机数据

9.把【自动发现规则】的时间间隔改为60s

点击【配置-主机-10.0.0.37-web2-自动发现规则】