Zabbix-Network-discovery-Network Discovery (Auto Discovery)

# 一 、 Introduction

网络发现: Zabbix server scans the hosts within the specified network range;
network discovery is one of zabbix's most distinctive functions, it can automatically add monitored hosts or services according to the rules defined by the user in advance

优点：

• Speed ​​up Zabbix deployment
• Simplify management
• Use Zabbix in a rapidly changing environment without over-management

发现方式:
Ip address range;
available services (ftp, ssh, http,…)
zabbix_agent response;
snmp_agent response;

Network discovery usually includes two stages: discovery and actions

• discovery:
  Zabbix regularly scans the IP range defined in the network discovery rules;
• actions: Events in network discovery can trigger actions to automatically perform specified actions, taking discvery events as a prerequisite;
  add / remove hosts
  enable / disable
  hosts add hosts to the group
  remove hosts in the group
  link the host from the template or cancel link

# 二 、 Configure network discovery Network discovery
### 1. Use the second host for 192.168.246.227 that can be discovered by scanning

#安装agent 段的包
[root@zabbix-agent-none2 ~]# # yum -y install zabbix-agent zabbix-sender

#设置agent 配置，可以把之前设置好的none1的配置传过来
[root@zabbix-agent-none2 ~]# vim /etc/zabbix/zabbix_agentd.conf
Server=192.168.62.135
ServerActive=192.168.62.135
Hostname=zabbix-agent-none2 #只需修改hostname

[root@zabbix-agent-none2 ~]# visudo       #修改sudo的配置,添加如下信息
zabbix ALL=(ALL) NOPASSWD: ALL

#开启服务
[root@zabbix-agent-none2 ~]# systemctl start zabbix-agent

### 2. Set automatic discovery rule discovery
configuration-automatic discovery-create automatic discovery rule
ip range should not be too large

Test on zabbix-server

[root@zabbix-server ~]# zabbix_get -s 192.168.246.227 -p 10050 -k "system.uname"
Linux zabbix-agent-none2 3.10.0-693.el7.x86_64 #1 SMP Tue Aug 22 21:09:27 UTC 2017 x86_64

Update interval: just set it to 1h, don't scan too frequently, scan the entire network segment, too waste resources; here for experiment, set to 1m

### 3. Auto discovery succeeded

### 4. Set automatic discovery action

create:

• Set condition A, automatic discovery rule = test net

• Set condition B, auto-discovery status = up
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• Add host to monitor
  Automatically link Template OS Linux to this host
  

• After the configuration action is completed, it is disabled by default. If it is not disabled, you need to choose to start again and activate it.
  

• Enable the action, check the effect
  has taken effect, add the host successfully, the template link is successful
  

• If the host you need to add has been scanned and added, you can turn off network scanning because it consumes too much resources