feat: add snmp server for k8s (#124)

scripts/kubernetes/snmp-server.yaml

@@ -0,0 +1,160 @@
+apiVersion: v1
+kind: ConfigMap
+metadata:
+  name: snmp-notifier-mib
+data:
+  # file-like keys
+  SNMP-NOTIFIER-MIB.my: |
+    SNMP-NOTIFIER-MIB DEFINITIONS ::= BEGIN
+
+    IMPORTS
+      MODULE-IDENTITY, enterprises FROM SNMPv2-SMI;
+
+    snmpNotifier MODULE-IDENTITY
+      LAST-UPDATED "202201070000Z"
+      ORGANIZATION "SNMP Notifier"
+      CONTACT-INFO
+          "SNMP Notifier
+
+          https://github.com/maxwo/snmp_notifier/
+
+          "
+
+      DESCRIPTION
+          "This MIB contains definition of the SNMP Traps
+          associated to alerts sent by the SNMP Notifier"
+
+      REVISION
+          "201912260000Z"
+
+      DESCRIPTION
+          "First revision that includes only the alerts subtree"
+    ::= { enterprises 98789 }
+
+    snmpNotifierAlertsObjects OBJECT IDENTIFIER ::= { snmpNotifier 2 }
+
+    snmpNotifierAlertId OBJECT-TYPE
+      SYNTAX      DisplayString
+      MAX-ACCESS  accessible-for-notify
+      STATUS      current
+      DESCRIPTION "The ID of the SNMP notifier alert."
+    ::= { snmpNotifierAlertsObjects 1 }
+
+    snmpNotifierAlertSeverity OBJECT-TYPE
+      SYNTAX      DisplayString
+      MAX-ACCESS  accessible-for-notify
+      STATUS      current
+      DESCRIPTION "The severity of the SNMP notifier alert."
+    ::= { snmpNotifierAlertsObjects 2 }
+
+    snmpNotifierAlertDescription OBJECT-TYPE
+      SYNTAX      DisplayString
+      MAX-ACCESS  accessible-for-notify
+      STATUS      current
+      DESCRIPTION "The description of the SNMP notifier alert."
+    ::= { snmpNotifierAlertsObjects 3 }
+
+    snmpNotifierDefaultTrap NOTIFICATION-TYPE
+      OBJECTS {
+          snmpNotifierAlertId,
+          snmpNotifierAlertSeverity,
+          snmpNotifierAlertDescription
+      }
+      STATUS current
+      DESCRIPTION "The default SNMP notifier notification"
+      ::= { snmpNotifier 1 }
+    END
+---
+apiVersion: v1
+kind: ConfigMap
+metadata:
+  name: snmptrapd-configuration
+data:
+  # file-like keys
+  snmptrapd.conf: |
+    # A list of listening addresses, on which to receive incoming SNMP notifications
+    snmpTrapdAddr udp:1162
+    snmpTrapdAddr udp6:1162
+
+    # Do not fork from the calling shell
+    doNotFork yes
+    # File in which to store the process ID of the notification receiver
+    pidFile /tmp/snmptrapd.pid
+    # Disables support for the NOTIFICATION-LOG-MIB
+    doNotRetainNotificationLogs yes
+
+    format2 %V\n% Agent Address: %A \n Agent Hostname: %B \n Date: %H - %J - %K - %L - %M - %Y \n Enterprise OID: %N \n Trap Type: %W \n Trap Sub-Type: %q \n Community/Infosec Context: %P \n Uptime: %T \n Description: %W \n PDU Attribute/Value Pair Array:\n%v \n -------------- \n
+
+    createUser -e 0x8000000001020304 snmp_user_v3 SHA auth_password_v3 AES encrypt_password_v3
+
+    authUser log,execute,net snmp_user_v3
+    authCommunity log,execute,net public
+
+---
+kind: Service
+apiVersion: v1
+metadata:
+  name: snmp-server
+spec:
+  type: ClusterIP
+  ports:
+    - name: snmp
+      port: 162
+      targetPort: 1162
+      protocol: UDP
+  selector:
+    app.kubernetes.io/name: snmp-server
+    app.kubernetes.io/instance: release-name
+---
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: snmp-server
+spec:
+  replicas: 1
+  selector:
+    matchLabels:
+      app.kubernetes.io/name: snmp-server
+      app.kubernetes.io/instance: release-name
+  strategy:
+    rollingUpdate:
+      maxSurge: 1
+      maxUnavailable: 0
+    type: RollingUpdate
+  template:
+    metadata:
+      labels:
+        app.kubernetes.io/name: snmp-server
+        app.kubernetes.io/instance: release-name
+      annotations: {}
+    spec:
+      restartPolicy: Always
+      containers:
+        - name: snmp-server
+          image: "zabbix/zabbix-snmptraps"
+          imagePullPolicy: IfNotPresent
+          args:
+          resources: {}
+          ports:
+            - containerPort: 1162
+              name: snmp
+          volumeMounts:
+            - name: mibs
+              mountPath: "/var/lib/zabbix/mibs"
+              readOnly: true
+            - name: configuration
+              mountPath: "/etc/snmp"
+              readOnly: true
+      volumes:
+        - name: mibs
+          configMap:
+            name: snmp-notifier-mib
+            items:
+              - key: "SNMP-NOTIFIER-MIB.my"
+                path: "SNMP-NOTIFIER-MIB.my"
+        - name: configuration
+          configMap:
+            name: snmptrapd-configuration
+            items:
+              - key: "snmptrapd.conf"
+                path: "snmptrapd.conf"

scripts/local/listen.sh

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+#!/bin/bash
+
+set -ex
+
+rm -rf /var/db/net-snmp
+mkdir -p $HOME/.snmp/mibs
+ln -s $PWD/../mibs/SNMP-NOTIFIER-MIB.my $HOME/.snmp/mibs/SNMP-NOTIFIER-MIB.my
+snmptrapd -m ALL -m +SNMP-NOTIFIER-MIB -f -Of -Lo -c snmptrapd.conf -x 127.0.0.1 "::1"