This Docker container runs snmpd with a custom script that provides a specific OID (.1.3.6.1.4.1.38446.1.2.4.1.9.1). The value of this OID increases randomly by a small amount every 4 minutes.

Features

Lightweight Docker container based on Alpine Linux.
Custom Python script to generate and update the OID value.
Configurable SNMP daemon (snmpd) to use the custom script.

Requirements

Docker installed on your system.
Basic knowledge of Docker commands.

Dependencies

snmpd: The SNMP daemon.
Python 3: Used to write the custom script.
random: Python library for generating random numbers.

How to Use

Step 1: Build the Docker Image

Navigate to the directory containing the Dockerfile and custom_snmp_script.py, then run:

docker build -t snmpd-custom .

Step 2: Run the Docker Container

Start the Docker container with the following command:

docker run -d -p 161:161/udp --name snmpd-custom-container snmpd-custom

Step 3: Verify the Setup

You can verify that the container is running and the SNMP daemon is providing the custom OID by using an SNMP client to query the OID:

snmpwalk -v 2c -c public localhost .1.3.6.1.4.1.38446.1.2.4.1.9.1

You should see the value incrementing randomly every 4 minutes.

Customization

Initial Value: You can change the initial value in the custom_snmp_script.py file.
Increment Range: Modify the range in the script to change how much the value increments.
Update Interval: Adjust the sleep interval in the script to change the frequency of updates.

Notes

Ensure that the SNMP community string (public in the example) matches your configuration.
The container exposes port 161 for SNMP communication.

License

This project is licensed under the MIT License.