Send backup status via exporter to Prometheus

files/prometheus-borg-exporter.service

@@ -0,0 +1,7 @@
+[Unit]
+Description=Prometheus Borg Exporter
+After=network-online.target
+
+[Service]
+ExecStart=/usr/local/bin/borg_exporter
+Type=oneshot

files/prometheus-borg-exporter.timer

@@ -0,0 +1,8 @@
+[Unit]
+Description=Prometheus Borg Exporter Timer
+
+[Timer]
+OnCalendar=*:0/30
+
+[Install]
+WantedBy=timers.target

handlers/main.yml

@@ -0,0 +1,14 @@
+---
+- name: Restart exporter service
+  ansible.builtin.systemd:
+    name: prometheus-borg-exporter.service
+    daemon_reload: true
+    state: restarted
+    enabled: true
+
+- name: Restart exporter timer
+  ansible.builtin.systemd:
+    name: prometheus-borg-exporter.timer
+    daemon_reload: true
+    state: restarted
+    enabled: true

tasks/exporter.yml

@@ -0,0 +1,20 @@
+---
+- name: "Exporter | Copy borg_exporter"
+  ansible.builtin.template:
+    src: borg_exporter.j2
+    dest: /usr/local/bin/borg_exporter
+    mode: "0755"
+
+- name: "Exporter | Copy systemd unit"
+  ansible.builtin.copy:
+    src: prometheus-borg-exporter.service
+    dest: /etc/systemd/system/prometheus-borg-exporter.service
+    mode: "0644"
+  notify: Restart exporter service
+
+- name: "Exporter | Copy systemd timer"
+  ansible.builtin.copy:
+    src: prometheus-borg-exporter.timer
+    dest: /etc/systemd/system/prometheus-borg-exporter.timer
+    mode: "0644"
+  notify: Restart exporter timer

tasks/main.yml

@@ -20,3 +20,13 @@
 - name: Setup borg
   ansible.builtin.import_tasks: borg.yml
   tags: borg
+
+- name: Get installed packages
+  ansible.builtin.package_facts:
+    manager: apt
+  tags: exporter
+
+- name: Setup Prometheus exporter
+  ansible.builtin.import_tasks: exporter.yml
+  tags: exporter
+  when: "'prometheus-node-exporter' in ansible_facts.packages"

templates/borg_exporter.j2

@@ -0,0 +1,78 @@
+#!/bin/bash
+{{ ansible_managed | comment }}
+
+set -eu
+
+LOGFILE=/var/log/borg
+TEXTFILE_COLLECTOR_DIR=/var/lib/node_exporter
+PROM_FILE=$TEXTFILE_COLLECTOR_DIR/backup.prom
+TMP_FILE=$PROM_FILE.$$
+HOSTNAME=$(hostname)
+COUNTER=0
+
+mkdir -p $TEXTFILE_COLLECTOR_DIR
+
+IFS=$'\n'
+#for i in $LIST; do
+#	COUNTER=$((COUNTER+1))
+#done
+
+if [ -f "$LOGFILE" ] && [ ! $(find "$LOGFILE" -mtime +2 -print) ] ; then
+    RESULT_B=$(cat $LOGFILE | grep "terminating" | awk '{print $3}' | head -1 )
+    if [ "$RESULT_B" == 'success' ]; then RESULT_BACKUP=0; elif [ "$RESULT_B" == 'warning' ]; then RESULT_BACKUP=1; elif [ "$RESULT_B" == 'error' ]; then RESULT_BACKUP=2; else RESULT_BACKUP=3; fi
+    RESULT_P=$(cat $LOGFILE | grep "terminating" | awk '{print $3}' | tail -1)
+    if [ "$RESULT_P" == 'success' ]; then RESULT_PRUNE=0; elif [ "$RESULT_P" == 'warning' ]; then RESULT_PRUNE=1; elif [ "$RESULT_P" == 'error' ]; then RESULT_PRUNE=2; else RESULT_PRUNE=3; fi
+else
+    RESULT_BACKUP=3
+    RESULT_PRUNE=3
+fi
+
+echo "backup_result{host=\"${HOSTNAME}\"} $RESULT_BACKUP" 
+echo "prune_result{host=\"${HOSTNAME}\"} $RESULT_PRUNE" 
+echo "backup_result{host=\"${HOSTNAME}\"} $RESULT_BACKUP" >> $TMP_FILE
+echo "prune_result{host=\"${HOSTNAME}\"} $RESULT_PRUNE" >> $TMP_FILE
+
+
+BORG_INFO=$(borgmatic info --last 1 ) || mv $TMP_FILE $PROM_FILE
+#echo "backup_count{host=\"${HOSTNAME}\"} $COUNTER" > $TMP_FILE
+echo "backup_files{host=\"${HOSTNAME}\"} $(echo "$BORG_INFO" | grep "Number of files" | awk '{print $4}')" >> $TMP_FILE
+echo "backup_chunks_unique{host=\"${HOSTNAME}\"} $(echo "$BORG_INFO" | grep "Chunk index" | awk '{print $3}')" >> $TMP_FILE
+echo "backup_chunks_total{host=\"${HOSTNAME}\"} $(echo "$BORG_INFO" | grep "Chunk index" | awk '{print $4}')" >> $TMP_FILE
+
+function calc_bytes {
+	NUM=$1
+	UNIT=$2
+	
+	case "$UNIT" in
+		kB)
+			echo $NUM | awk '{ print $1 * 1024 }'
+			;;
+		MB)
+			echo $NUM | awk '{ print $1 * 1024 * 1024 }'
+			;;
+		GB)
+			echo $NUM | awk '{ print $1 * 1024 * 1024 * 1024 }'
+			;;
+		TB)
+			echo $NUM | awk '{ print $1 * 1024 * 1024 * 1024 * 1024 }'
+			;;
+	esac
+}
+
+# byte size
+LAST_SIZE=$(calc_bytes $(echo "$BORG_INFO" |grep "This archive" |awk '{print $3}') $(echo "$BORG_INFO" |grep "This archive" |awk '{print $4}'))
+LAST_SIZE_COMPRESSED=$(calc_bytes $(echo "$BORG_INFO" |grep "This archive" |awk '{print $5}') $(echo "$BORG_INFO" |grep "This archive" |awk '{print $6}'))
+LAST_SIZE_DEDUP=$(calc_bytes $(echo "$BORG_INFO" |grep "This archive" |awk '{print $7}') $(echo "$BORG_INFO" |grep "This archive" |awk '{print $8}'))
+TOTAL_SIZE=$(calc_bytes $(echo "$BORG_INFO" |grep "All archives" |awk '{print $3}') $(echo "$BORG_INFO" |grep "All archives" |awk '{print $4}'))
+TOTAL_SIZE_COMPRESSED=$(calc_bytes $(echo "$BORG_INFO" |grep "All archives" |awk '{print $5}') $(echo "$BORG_INFO" |grep "All archives" |awk '{print $6}'))
+TOTAL_SIZE_DEDUP=$(calc_bytes $(echo "$BORG_INFO" |grep "All archives" |awk '{print $7}') $(echo "$BORG_INFO" |grep "All archives" |awk '{print $8}'))
+
+
+echo "backup_last_size{host=\"${HOSTNAME}\"} $LAST_SIZE" >> $TMP_FILE
+echo "backup_last_size_compressed{host=\"${HOSTNAME}\"} $LAST_SIZE_COMPRESSED" >> $TMP_FILE
+echo "backup_last_size_dedup{host=\"${HOSTNAME}\"} $LAST_SIZE_DEDUP" >> $TMP_FILE
+echo "backup_total_size{host=\"${HOSTNAME}\"} $TOTAL_SIZE" >> $TMP_FILE
+echo "backup_total_size_compressed{host=\"${HOSTNAME}\"} $TOTAL_SIZE_COMPRESSED" >> $TMP_FILE
+echo "backup_total_size_dedup{host=\"${HOSTNAME}\"} $TOTAL_SIZE_DEDUP" >> $TMP_FILE
+
+mv $TMP_FILE $PROM_FILE