roles/prometheus_node/files/apt.sh

@@ -0,0 +1,32 @@
+#!/bin/bash
+#
+# Description: Expose metrics from apt updates.
+#
+# Author: Ben Kochie <superq@gmail.com>
+
+upgrades="$(/usr/bin/apt-get --just-print dist-upgrade \
+  | /usr/bin/awk -F'[()]' \
+      '/^Inst/ { sub("^[^ ]+ ", "", $2); gsub(" ","",$2);
+                 sub("\\[", " ", $2); sub("\\]", "", $2); print $2 }' \
+  | /usr/bin/sort \
+  | /usr/bin/uniq -c \
+  | awk '{ gsub(/\\\\/, "\\\\", $2); gsub(/\"/, "\\\"", $2);
+           gsub(/\[/, "", $3); gsub(/\]/, "", $3);
+           print "apt_upgrades_pending{origin=\"" $2 "\",arch=\"" $NF "\"} " $1}'
+)"
+
+echo '# HELP apt_upgrades_pending Apt package pending updates by origin.'
+echo '# TYPE apt_upgrades_pending gauge'
+if [[ -n "${upgrades}" ]] ; then
+  echo "${upgrades}"
+else
+  echo 'apt_upgrades_pending{origin="",arch=""} 0'
+fi
+
+echo '# HELP node_reboot_required Node reboot is required for software updates.'
+echo '# TYPE node_reboot_required gauge'
+if [[ -f '/run/reboot-required' ]] ; then
+  echo 'node_reboot_required 1'
+else
+  echo 'node_reboot_required 0'
+fi

roles/prometheus_node/files/prometheus-node-exporter-apt.service

@@ -0,0 +1,7 @@
+[Unit]
+Description=Collect apt metrics for prometheus-node-exporter
+
+[Service]
+Type=oneshot
+Environment=TMPDIR=/var/lib/prometheus/node-exporter
+ExecStart=/bin/bash -c "/usr/share/prometheus-node-exporter/apt.sh | sponge /var/lib/prometheus/node-exporter/apt.prom"

roles/prometheus_node/files/prometheus-node-exporter-apt.timer

@@ -0,0 +1,9 @@
+[Unit]
+Description=Run apt metrics collection every 15 minutes
+
+[Timer]
+OnBootSec=0
+OnUnitActiveSec=15min
+
+[Install]
+WantedBy=timers.target

roles/prometheus_node/tasks/main.yml

@@ -23,6 +23,16 @@
   when:
     - ansible_lsb.codename == 'stretch'
 
+- name: Install Prometheus node-exporter collectors (bullseye)
+  apt:
+    update_cache: true
+    name: prometheus-node-exporter-collectors
+    install_recommends: false
+  register: apt_result
+  retries: 3
+  until: apt_result is succeeded
+  when: ansible_facts['lsb']['codename'] == 'bullseye'
+
 - name: Activate prometheus-node-exporter service
   systemd:
     name: prometheus-node-exporter