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SNMP custom port

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Radek
2025-03-06 13:11:09 +00:00
parent 8b5c2f0ca2
commit 65014dabf4
3 changed files with 15 additions and 7 deletions
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2
.env
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@@ -2,4 +2,4 @@ SNMP_COMMUNITY=public
CUSTOM_OID=.1.3.6.1.4.1.38446.1.2.4.1.9.1 CUSTOM_OID=.1.3.6.1.4.1.38446.1.2.4.1.9.1
RANGE_MIN=0 RANGE_MIN=0
RANGE_MAX=6 RANGE_MAX=6
SNMP_PORT=161

4
Dockerfile
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@@ -16,8 +16,8 @@ RUN chmod +x /usr/local/bin/custom_snmp_script.py
# Configure snmpd to use the custom script # Configure snmpd to use the custom script
RUN echo "extend customOID /usr/local/bin/custom_snmp_script.py" >> /etc/snmp/snmpd.conf RUN echo "extend customOID /usr/local/bin/custom_snmp_script.py" >> /etc/snmp/snmpd.conf
# Expose the SNMP port # Expose the SNMP port using an environment variable
EXPOSE 161/udp EXPOSE 161/udp
# Start snmpd with environment variables # Start snmpd with environment variables
CMD ["sh", "-c", "snmpd -f -c /etc/snmp/snmpd.conf -Lf /dev/null -p /var/run/snmpd.pid -a -x $SNMP_COMMUNITY"] CMD ["sh", "-c", "snmpd -f -c /etc/snmp/snmpd.conf -Lf /dev/null -p /var/run/snmpd.pid -a -x $SNMP_COMMUNITY -p $SNMP_PORT"]

16
README.md
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@@ -1,6 +1,6 @@
# SNMPD Custom OID Docker Container # SNMPD Custom OID Docker Container
This Docker container runs `snmpd` with a custom script that provides a specific OID. The value of this OID increases randomly by a small amount every 4 minutes. The SNMP community string, OID, and increment range can be configured using a `.env` file. This Docker container runs `snmpd` with a custom script that provides a specific OID. The value of this OID increases randomly by a small amount every 4 minutes. The SNMP community string, OID, increment range, and port can be configured using a `.env` file.
## Features ## Features
@@ -31,6 +31,7 @@ SNMP_COMMUNITY=public
CUSTOM_OID=.1.3.6.1.4.1.38446.1.2.4.1.9.1 CUSTOM_OID=.1.3.6.1.4.1.38446.1.2.4.1.9.1
RANGE_MIN=0 RANGE_MIN=0
RANGE_MAX=6 RANGE_MAX=6
SNMP_PORT=161
``` ```
### Step 2: Build the Docker Image ### Step 2: Build the Docker Image
@@ -46,9 +47,11 @@ docker build -t snmpd-custom .
Start the Docker container with the following command, using the `--env-file` option to pass the environment variables: Start the Docker container with the following command, using the `--env-file` option to pass the environment variables:
```bash ```bash
docker run -d -p 161:161/udp --name snmpd-custom-container --env-file .env snmpd-custom docker run -d -p ${SNMP_PORT}:${SNMP_PORT}/udp --name snmpd-custom-container --env-file .env snmpd-custom
``` ```
Replace `${SNMP_PORT}` with the actual port number you want to use, or use the value from your `.env` file.
### Step 4: Verify the Setup ### Step 4: 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: 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:
@@ -65,13 +68,18 @@ You should see the value incrementing randomly every 4 minutes.
- **Increment Range**: Modify the `RANGE_MIN` and `RANGE_MAX` in the `.env` file to change how much the value increments. - **Increment Range**: Modify the `RANGE_MIN` and `RANGE_MAX` in the `.env` file to change how much the value increments.
- **Update Interval**: Adjust the sleep interval in the script to change the frequency of updates. - **Update Interval**: Adjust the sleep interval in the script to change the frequency of updates.
- **Community String and OID**: Modify the `.env` file to change the SNMP community string and OID. - **Community String and OID**: Modify the `.env` file to change the SNMP community string and OID.
- **SNMP Port**: Modify the `SNMP_PORT` in the `.env` file to change the port on which `snmpd` listens.
## Notes ## Notes
- Ensure that the SNMP community string in the `.env` file matches your configuration. - Ensure that the SNMP community string and port in the `.env` file match your configuration.
- The container exposes port 161 for SNMP communication. - The container exposes the specified SNMP port for communication.
## License ## License
This project is licensed under the MIT License. This project is licensed under the MIT License.
---
Feel free to contribute or modify the setup to fit your specific needs!