ECS：如何在 SNMP 代理程序上启用 TCP 和或 UDP

Summary: 默认情况下，Simple Network Management Protocol (SNMP) 使用 User Datagram Protocol (UDP) 传输层协议在 Elastic Cloud Storage (ECS) 上单独报告节点运行状况。有时使用 Transmission Control Protocol (TCP)，这是一种基于会话的 SNMP 协议。这对于需要使用 TCP 协议的特定安全或操作问题是必需的。 ...

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Instructions

默认情况下，Simple Network Management Protocol (SNMP) 使用 User Datagram Protocol (UDP) 传输层协议在 Elastic Cloud Storage (ECS) 上单独报告节点运行状况。有时使用 Transmission Control Protocol (TCP)，这是一种基于会话的 SNMP 协议。这对于需要使用 TCP 协议的特定安全或操作问题是必需的。

以下可以设置为允许通过 SNMP 进行 TCP 和 UDP 通信：
  1. 添加 agentaddress udp:161,tcp:161 以允许在节点 SNMP 代理程序上使用 TCP 和 UDP 协议：
命令：
# sudo vi /etc/snmp/snmpd.conf

示例： 
#       sec.name  source          community
com2sec local       localhost       secret42
com2sec cust1_sec   192.0.2.0/24    public
com2sec cust1_sec   192.0.2.0/24    public
com2sec cust1_sec   0.0.0.0/0    happyplace
com2sec snmpv3_user 198.51.100.0/24 public
com2sec snmpv3_user 198.51.100.0/24 public

agentaddress udp:161,tcp:161

...
 
  1. 重新启动节点上的 SNMP 代理程序以获取配置中的新更改：
命令：
# sudo systemctl restart snmpd
# sudo systemctl status snmpd

示例： 
admin@node1:~> sudo systemctl restart snmpd
admin@node1:~> sudo systemctl status snmpd
  snmpd.service - LSB: Net-SNMP agent
   Loaded: loaded (/etc/init.d/snmpd; bad; vendor preset: disabled)
   Active: active (running) since Fri 2020-05-01 15:16:52 UTC; 20min ago
     Docs: man:systemd-sysv-generator(8)
  Process: 80940 ExecStop=/etc/init.d/snmpd stop (code=exited, status=0/SUCCESS)
  Process: 80948 ExecStart=/etc/init.d/snmpd start (code=exited, status=0/SUCCESS)
    Tasks: 1 (limit: 512)
   Memory: 4.5M
      CPU: 802ms
   CGroup: /system.slice/snmpd.service
             80959 /usr/sbin/snmpd -r -A -LF n /var/log/net-snmpd.log -p /var/run/snmpd.pid

May 01 15:16:52 ecsnode1.gslabs.lab.emc.com systemd[1]: Starting LSB: Net-SNMP agent...
May 01 15:16:52 node1 snmpd[80948]: Starting snmpd..done
May 01 15:16:52 node1 systemd[1]: Started LSB: Net-SNMP agent.
 
  1. 确认发生了更改，并且 SNMP 正在侦听 TCP 和 UDP 协议：
命令：
# sudo netstat -lntup | grep snmp

示例： 
admin@node1:~> sudo netstat -lntup | grep snmp
tcp        0      0 127.0.0.1:199           0.0.0.0:*               LISTEN      80959/snmpd
tcp        0      0 0.0.0.0:161             0.0.0.0:*               LISTEN      80959/snmpd
udp        0      0 0.0.0.0:161             0.0.0.0:*                           80959/snmpd

This change to the SNMP agents on the nodes can be done during the agent deployments in KB ECS: How to setup SNMP v2c and v3 monitoring support

Affected Products

ECS Appliance

Products

ECS Appliance, ECS Appliance Gen 1, ECS Appliance Gen 2, ECS Appliance Gen 3
Article Properties
Article Number: 000021179
Article Type: How To
Last Modified: 03 Mar 2023
Version:  5
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