From 142af72ebc9e1c2151101d6c3318ee48fdf00a87 Mon Sep 17 00:00:00 2001
From: Dennis Fink
Date: Sun, 27 Sep 2026 13:13:05 +0200
Subject: feat(systemd): retry failed exporter runs

Update the systemd service to restart the exporter on failure up to five
times with a ten-minute delay between attempts.

Update the systemd timer to use Persistent=true so missed daily runs are
triggered after downtime, and remove network-online ordering from the
timer.

Keep network-online ordering on the service and remove the stale borg
cache reference from its hardening comment.
---
 contrib/prometheus-pacman-exporter.service | 9 ++++++++-
 contrib/prometheus-pacman-exporter.timer   | 3 +--
 2 files changed, 9 insertions(+), 3 deletions(-)

(limited to 'contrib')

diff --git a/contrib/prometheus-pacman-exporter.service b/contrib/prometheus-pacman-exporter.service
index 3b3dfa6..b463cbf 100644
--- a/contrib/prometheus-pacman-exporter.service
+++ b/contrib/prometheus-pacman-exporter.service
@@ -3,15 +3,22 @@ Description=Pacman Prometheus metrics exporter
 After=network-online.target
 Wants=network-online.target
 
+# Allow the initial attempt plus five retries.
+StartLimitIntervalSec=2h
+StartLimitBurst=6
+
 [Service]
 Type=oneshot
 EnvironmentFile=/etc/conf.d/prometheus-pacman-exporter
 ExecStart=/usr/bin/prometheus-pacman-exporter $PROMETHEUS_PACMAN_EXPORTER_ARGS
 
+Restart=on-failure
+RestartSec=10min
+
 User=root
 Group=root
 
-# Needs write access to emit the .prom file and read/write the borg cache.
+# Needs write access to emit the .prom file.
 # All other paths read-only by default
 ReadWritePaths=/var/lib/prometheus/node-exporter
 # Mount a private /tmp not shared with the rest of the system
diff --git a/contrib/prometheus-pacman-exporter.timer b/contrib/prometheus-pacman-exporter.timer
index 46afeea..5fa7b81 100644
--- a/contrib/prometheus-pacman-exporter.timer
+++ b/contrib/prometheus-pacman-exporter.timer
@@ -1,11 +1,10 @@
 [Unit]
 Description=Run Pacman Prometheus metrics exporter daily
-After=network-online.target
-Wants=network-online.target
 
 [Timer]
 OnCalendar=daily
 AccuracySec=1h
+Persistent=true
 
 [Install]
 WantedBy=timers.target
-- 
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