1 Install Ganglia

Ganglia installation and deployment process

2 Download the modpython.so dynamic library (if you have modpython.so, you can skip this step)

yum -y install ganglia-gmond-python

3 Configure your own extended metric

The official provides some metrics that can be modified and used directly:
https://github.com/ganglia/gmond_python_modules

① Modify the configuration file and add extended modules

vim /etc/ganglia/gmond.conf

modules {...module {name = "sys_module" ##Note that the name should correspondpath = "modsys.so"}/* Add python main module */module {name = "python_module"/* Dynamic library path, the full path is $GANGLIA_ROOT/lib64/ganglia/modpython.so */path = "modpython.so"/* Python extension module code storage directory, if it does not exist, create it */params="/etc/ganglia/python_modules/"}}include ('/etc/ganglia/conf.d/*.conf') /* /etc/ganglia/conf.d/ is the storage directory for the configuration file of the python extension module. If it does not exist, create it. When gmond starts, it will load all configuration files and python module code*/include ('/etc/ganglia/conf.d/*.pyconf') ... 

② Write extension module Python code and configuration file

Extension module configuration file storage location

/etc/ganglia/conf.d/xxx.pyconf

Extension module python code storage location

/usr/lib64/ganglia/python_modules/xxx.py

3 Restart service

systemctl restart gmond.service