Nagios is an open source free network monitoring tool that can effectively monitor the status of Windows, Linux and Unix hosts, network settings such as switches, routers, printers, etc. When the system or service status is abnormal, an email or SMS alarm will be sent to notify the website operation and maintenance personnel at the first time, and a normal email or SMS notification will be sent after the status is restored.
Nagios is a monitoring system that monitors system operating status and network information. Nagios can monitor the specified local or remote hosts and services, and provide exception notification functions.
Nagios can run on Linux/Unix platforms, and provides an optional browser-based WEB interface to facilitate system administrators to view network status, various system problems, and logs, etc.
The functions that Nagios can monitor include:
1. Monitor network services (SMTP, POP3, HTTP, NNTP, PING, etc.);
2. Monitor host resources (processor load, disk utilization, etc.);
3. Simple plug-in design allows users to Easily extend the detection method of own services;
4. Parallel service inspection mechanism;
5. Have the ability to define the network hierarchy, use the "parent" host definition to express the relationship between network hosts, this relationship can be used to discover and Clarify the downtime or unreachable state of the host;
6. Send alarms to the contact when service or host problems occur and resolve (via EMail, SMS, user-defined methods);
7. Some handlers can be defined so that they can be Or play a preventive role when the host fails;
8. Automatic log rolling function;
9. It can support and implement redundant monitoring of the host;
10. The optional WEB interface is used to view the current network status, notification and fault history , log files, etc.;