Technical Tip: Monitoring multiple Redis processes on a single server

[MR_B]

Description	This article describes how to create a custom plugin for FortiMonitor to monitor multiple Redis processes running on different ports on a single server instance.
Scope	FortiMonitor.
Solution	Review documentation Metrics and Incidents and Custom Plugins for Linux for general information on how custom metrics work. Review documentation Metric Management to change the metadata values for custom metrics if needed. Copy the /usr/lib/fm-agent/plugins/redis.py plugin to /usr/lib/fm-agent/plugins/redis2.py and make the following changes to the redis2.py file. Change the textkey value from textkey=”redis” to textkey=”redis2” Changing this textkey value will create a separate set of metadata in the web interface for redis2 Look for the following lines of code in both the execute_query function and the execute_simple_query function that define the hostname and password to be used by the functions. cmd = agent_util.which("redis-cli") if config.get("hostname"): cmd += " -h %s" % config["hostname"] if config.get("password"): cmd += " -a '%s'" % config["password"] Insert the following code just below to define the port for the function. if config.get("port"): cmd += " -p %s" % config["port"] Update the agent config file as mentioned here, however the values now need to be defined for the new plug redis2. In addition to defining the password to be used the port for the plugin must also be defined as in the example below: [redis2] password = xxxxx port = xxxxx To create plugins for additional Redis processes running on other ports on the same server, copy the process above providing a different name for the Redis plugin (such as redis3.py), change the name of the textkey value, and add a section to the agent config file defining the new password and port to be used by the plugin.