Zabbix 4.0.2试用（七）：在Linux主机中安装zabbix agent并添加主机（yum源安装）
之前介绍的是下载源安装包，编译安装的方式来安装agent，本次将采用yum源方式安装，前提是主机需要与互联网相通，操作如下：
1、关闭防火墙和SELINUX
使用root用户登陆系统：
首先查看防火墙状态
[root@zabbix ~]# firewall-cmd –state
running
[root@zabbix ~]#
关闭firewall，并禁止防火墙开机启动，命令如下：
[root@zabbix ~]# systemctl stop firewalld.service
[root@zabbix ~]# systemctl disable firewalld.service
再次查看，防火墙已不在运行：
[root@zabbix ~]# firewall-cmd –state
安装之前还需将SELINUX关闭，运行如下命令编辑SELINUX配置文件：
[root@zabbix ~]# vi /etc/selinux/config
并将SELINUX=enforcing改成SELINUX=disable，如下：
# This file controls the state of SELinux on the system.
# SELINUX= can take one of these three values:
# enforcing – SELinux security policy is enforced.
# permissive – SELinux prints warnings instead of enforcing.
# disabled – No SELinux policy is loaded.
SELINUX=disabled
# SELINUXTYPE= can take one of three two values:
# targeted – Targeted processes are protected,
# minimum – Modification of targeted policy. Only selected processes are protected.
# mls – Multi Level Security protection.
SELINUXTYPE=targeted
修改完成后，重启机器，运行如下命令查看是否 SELINUX已关闭：
[root@zabbix ~]# getenforce
退回disable即为已关闭。
2、安装Zabbix Agent
首先需添加对应的yum repository：
进入zabbix官网文档，选择产品手册->安装->从二进制包安装->1 Red Hat Enterprise，
官网：https://www.zabbix.com/download?zabbix=4.0&os_distribution=centos&os_version=6&db=mysql
开始安装agent：
[root@localhost ~]# yum install zabbix-agent
Loaded plugins: fastestmirror, langpacks
Determining fastest mirrors
* base: centos.ustc.edu.cn
* extras: centos.ustc.edu.cn
* updates: mirrors.shu.edu.cn
base | 3.6 kB 00:00:00
extras | 3.4 kB 00:00:00
updates | 3.4 kB 00:00:00
zabbix | 2.9 kB 00:00:00
zabbix-non-supported | 951 B 00:00:00
updates/7/x86_64/primary_db FAILED
http://mirrors.shu.edu.cn/centos/7.6.1810/updates/x86_64/repodata/384ed51dad1c96d9f80866dedacb6fd008516393c597a3da83afd33281356e1b-primary.sqlite.bz2: [Errno 14] curl#7 – “Failed connect to mirrors.shu.edu.cn:80; Connection refused”
Trying other mirror.
(1/5): extras/7/x86_64/primary_db | 156 kB 00:00:00
(2/5): base/7/x86_64/group_gz | 166 kB 00:00:00
(3/5): zabbix/x86_64/primary_db | 26 kB 00:00:00
(4/5): updates/7/x86_64/primary_db | 1.3 MB 00:00:04
(5/5): base/7/x86_64/primary_db | 6.0 MB 00:00:10
zabbix-non-supported/x86_64/primary | 1.6 kB 00:00:00
zabbix-non-supported 4/4
Resolving Dependencies
–> Running transaction check
—> Package zabbix-agent.x86_64 0:4.0.2-1.el7 will be installed
–> Finished Dependency ResolutionDependencies Resolved
===================================================================================================
Package Arch Version Repository Size
===================================================================================================
Installing:
zabbix-agent x86_64 4.0.2-1.el7 zabbix 384 kTransaction Summary
===================================================================================================
Install 1 PackageTotal download size: 384 k
Installed size: 1.5 M
Is this ok [y/d/N]: y
Downloading packages:
warning: /var/cache/yum/x86_64/7/zabbix/packages/zabbix-agent-4.0.2-1.el7.x86_64.rpm: Header V4 RSA/SHA512 Signature, key ID a14fe591: NOKEY
Public key for zabbix-agent-4.0.2-1.el7.x86_64.rpm is not installed
zabbix-agent-4.0.2-1.el7.x86_64.rpm | 384 kB 00:00:01
Retrieving key from file:///etc/pki/rpm-gpg/RPM-GPG-KEY-ZABBIX-A14FE591
Importing GPG key 0xA14FE591:
Userid : “Zabbix LLC <packager@zabbix.com>”
Fingerprint: a184 8f53 52d0 22b9 471d 83d0 082a b56b a14f e591
Package : zabbix-release-4.0-1.el7.noarch (installed)
From : /etc/pki/rpm-gpg/RPM-GPG-KEY-ZABBIX-A14FE591
Is this ok [y/N]: y
Running transaction check
Running transaction test
Transaction test succeeded
Running transaction
Warning: RPMDB altered outside of yum.
Installing : zabbix-agent-4.0.2-1.el7.x86_64 1/1
Verifying : zabbix-agent-4.0.2-1.el7.x86_64 1/1Installed:
zabbix-agent.x86_64 0:4.0.2-1.el7Complete!
[root@localhost ~]#
3、配置Zabbix Agent
完成安装后，开始配置zabbix_agentd.conf配置文件：
[root@localhost ~]# vi /etc/zabbix/zabbix_agentd.conf
主要完成以下几项的修改：
EnableRemoteCommands=1 //来至zabbix服务器的远程命令是否允许被执行
Server=192.168.10.208 //zabbix server地址，用于被动模式，数据获取
ServerActive=192.168.10.208 //主动发送的zabbix server地址，用于主动模式，数据提交
Hostname=localhost //和创建主机时的hostname一致
UnsafeUserParameters=1 //启用自定义key,zabbix监控mysql、tomcat等数据时需要自定义key
完成后保存退出。
这是比较全面的配置，可以把vi /etc/zabbix/zabbix_agentd.conf文件内清空
PidFile=/var/run/zabbix/zabbix_agentd.pid
LogFile=/var/log/zabbix/zabbix_agentd.log #错误日志
LogFileSize=0
ListenPort=10050 #启动监听端口
StartAgents=3 #被动模式下选择，主动模式则为0
ListenIP=0.0.0.0 #监听所有IP
Server=10.27.146.250 #被动模式下必填，将zabbix-server端的ip填入
#ServerActive=10.27.146.250 #主动模式下填写
Hostname=Api1Bearead #本机的hostname，此值必须与zabbix的网页上创建的主机名一致即可
Include=/etc/zabbix/zabbix_agentd.d/
4、启动Zabbix Agent
配置文件修改后，开始启动服务：
启动服务：
[root@localhost ~]# systemctl start zabbix-agent.service
添加开机启动功能：
[root@localhost ~]# systemctl enable zabbix-agent.service
Created symlink from /etc/systemd/system/multi-user.target.wants/zabbix-agent.service to /usr/lib/systemd/system/zabbix-agent.service.
查看agent服务是否已启动：
[root@localhost ~]# ps -ef | grep zabbix
zabbix 2842 1 0 06:37 ? 00:00:00 /usr/sbin/zabbix_agentd -c /etc/zabbix/zabbix_agentd.conf
zabbix 2843 2842 0 06:37 ? 00:00:00 /usr/sbin/zabbix_agentd: collector [idle 1 sec]
zabbix 2844 2842 0 06:37 ? 00:00:00 /usr/sbin/zabbix_agentd: listener #1 [waiting for connection]
zabbix 2845 2842 0 06:37 ? 00:00:00 /usr/sbin/zabbix_agentd: listener #2 [waiting for connection]
zabbix 2846 2842 0 06:37 ? 00:00:00 /usr/sbin/zabbix_agentd: listener #3 [waiting for connection]
zabbix 2847 2842 0 06:37 ? 00:00:00 /usr/sbin/zabbix_agentd: active checks #1 [idle 1 sec]
root 2896 2435 0 06:38 pts/1 00:00:00 grep –color=auto zabbix
[root@localhost ~]#
[root@localhost ~]# ss -tnl | grep 10050
LISTEN 0 128 *:10050 *:*
LISTEN 0 128 :::10050 :::*
如上，已发现agentd进程运行，并且10050端口已启动。
6、将主机添加至zabbix server平台
打开zabbix server主界面，选择“配置‘->”主机“，点击右上角的”创建“按扭，创建一台主机，如下图
输入主机名称，群组选择系统默认的Server hardware，agent代理接口IP设置刚才安装agent的主机192.168.10.209，端口默认10050，如下图：
再选择”模板“选项栏，链接指示器里选择”Template OS Linux“，点击添加，最后点击蓝底添加按扭，完成添加。
完成后可以看到列表中已经有刚才不回的主机，过几分钟后，可用性一栏中的ZBX变绿即表示监控正常。
