aten_pdu: First version of role

roles/aten_pdu/files/aten-mqtt-publish.sh

@@ -0,0 +1,54 @@
+#!/bin/sh
+
+set -eu
+umask 077
+
+community="public"
+
+mqtt_send() {
+    topic="$1"
+    value="$2"
+
+    tlsdir="$(openssl version -d | sed -e 's/^OPENSSLDIR: "\(.\+\)"$/\1/')"
+    mosquitto_pub -h mqtt02.home.foo.sh -t "$topic" -m "$value" \
+        --cafile "${tlsdir}/certs/ca.crt" \
+        --key "${tlsdir}/private/$(hostname -f).key" \
+        --cert "${tlsdir}/certs/$(hostname -f).crt"
+}
+
+snmp_get() {
+    host="$1"
+    key="$2"
+    snmpget -v 1 -c "$community" "$host" -Oqv -m ATEN-PE-CFG "$key" | tr -d '"'
+}
+
+# only run script if first vrrp interface is in master state
+for state in /run/keepalived/*.state ; do
+    if [ "$(cat "$state")" != "MASTER" ]; then
+        exit 0
+    fi
+    break
+done
+
+ldapsearch -Q -LLL "(&(objectClass=device)(description=Aten PE*))" cn | \
+    awk '{ if ($1 == "cn:") print $2 }' | while read -r name
+do
+    location="$(snmp_get "$name" RFC1213-MIB::sysLocation.0 | \
+        tr '[:upper:]' '[:lower:]' | tr ' ' '_')"
+    snmpwalk -v 1 -c "$community" "$name" -Oq \
+        -m ATEN-PE-CFG ATEN-PE-CFG::outletName | while read -r port device
+    do
+        port="$(echo "$port" | cut -d '.' -f 2)"
+        device="$(echo "$device" | tr -d '"')"
+        case "$device" in
+            "N/A"|"00 "|"unused")
+                continue
+                ;;
+        esac
+	for key in Current Power Voltage ; do
+            topic="home/${location}/${device}/$(echo "$key" | tr '[:upper:]' '[:lower:]')"
+	    value="$(snmp_get "$name" "ATEN-PE-CFG::outlet${key}.${port}")"
+            mqtt_send "$topic" "$value"
+        done
+    done
+done

roles/aten_pdu/meta/main.yml

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+---
+dependencies:
+  - {role: ldap}

roles/aten_pdu/tasks/main.yml

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+---
+- name: Install packages
+  ansible.builtin.package:
+    name: "{{ item }}"
+    state: installed
+  with_items:
+    - mosquitto
+    - net-snmp-utils
+
+# https://www.aten.com/eu/en/products/power-distribution-&-racks/rack-pdu/pe8108/
+- name: Install custom mib
+  ansible.builtin.copy:
+    dest: /usr/share/snmp/mibs/ATEN-PE-CFG.txt
+    src: ATEN-PE-CFG_str_1.3.128.mib
+    mode: "0644"
+    owner: root
+    group: "{{ ansible_wheel }}"
+
+- name: Install mqtt publish script
+  ansible.builtin.copy:
+    dest: /usr/local/bin/aten-mqtt-publish
+    src: aten-mqtt-publish.sh
+    mode: "0755"
+    owner: root
+    group: "{{ ansible_wheel }}"
+
+- name: Add mqtt publish cron job
+  ansible.builtin.cron:
+    name: aten-mqtt-publish
+    job: /usr/local/bin/aten-mqtt-publish
+    minute: "*/5"