NGINX Agent
The NGINX Agent monitors NGINX Webservers. Depending on the agent platform you use, its architecture and functionality may differ. Find the detailed information below.
See Configure NGINX Agent to learn how to configure the Agent.
Architecture
The NGINX consists only of a NGINX Agent Server Module that is loaded by the web server. It collects data of all worker processes. It gathers the information that is used for analysis on the AppMon Server. The AppMon Agent is responsible for handling communication with the Collector. Find more information about AppMon Agent platform here.
AppMon 2017 May
AppMon 2018 April
To use AppMon Agent you need to install Classic Agents first, and then switch the platform.
AppMon 2018 April Update 8 Switch of the platform is not required. AppMon Agent platform is the default for the NGINX Agent. If you migrate your System Profile from a previous version, the NGINX Agent will be automatically switched to the AppMon Agent platform.
The NGINX Agents consists of two parts:
- The NGINX Agent Server Module (slave) is the module that is loaded by the web server. It gathers the information that is used for analysis on the AppMon Server.
- The Web Server Master Agent is a separate process that collects data of all worker processes (slaves). It handles communication with the Collector and retrieves configuration data among other functions. See Web Server Maser Agent configuration to learn how to configure this master agent.
Communication
The NGINX Agent communicates with the Master Agent through these channels:
- A shared memory segment propagates configuration data, received from the Collector by the Master Agent, to the worker processes and to hold other information that must be shared across all worker processes. The shared memory segment is backed by a file in
<DT_HOME>/agent/confon all platforms where the worker processes and the Agent process must have read/write access. - The NGINX Agents (slaves) send collected data to the Master Agent through a stateless UDP connection. The Master Agent collects the data, transforms it, and forwards it to the Collector (standalone or Server-embedded).
Sensors
| Sensor | Classic Agent | AppMon Agent |
|---|---|---|
| Webserver sensor |  |
|
| NGINX modules |  |
|
| User Experience sensor | |
|