add env config

.env

@@ -0,0 +1,2 @@
+SNMP_COMMUNITY=public
+CUSTOM_OID=.1.3.6.1.4.1.38446.1.2.4.1.9.1

Dockerfile

@@ -14,10 +14,10 @@ COPY custom_snmp_script.py /usr/local/bin/custom_snmp_script.py
 RUN chmod +x /usr/local/bin/custom_snmp_script.py
 
 # Configure snmpd to use the custom script
-RUN echo "extend .1.3.6.1.4.1.38446.1.2.4.1.9.1 /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 161/udp
 
-# Start snmpd
-CMD ["snmpd", "-f"]
+# 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"]

custom_snmp_script.py

@@ -1,7 +1,11 @@
 #!/usr/bin/env python3
+import os
 import random
 import time
 
+# Read the OID from the environment variable
+oid = os.getenv('CUSTOM_OID', '.1.3.6.1.4.1.38446.1.2.4.1.9.1')
+
 # Initial value
 value = 1385062
 
@@ -10,7 +14,7 @@ while True:
     value += random.randint(0, 6)
 
     # Output the value in the required format
-    print(f"INTEGER: {value}")
+    print(f"{oid} = INTEGER: {value}")
 
     # Wait for 4 minutes
     time.sleep(240)