From 6aee7dbe350924175b21afe367ca37ddbc23c2f2 Mon Sep 17 00:00:00 2001
From: Ian Kelling <iank@fsf.org>
Date: Sun, 11 Jun 2023 17:29:27 -0400
Subject: [PATCH] simplify node-exporter

---
 prom-node-exporter | 43 +++++++++++++------------------------------
 1 file changed, 13 insertions(+), 30 deletions(-)

diff --git a/prom-node-exporter b/prom-node-exporter
index 61fe700..c75b496 100755
--- a/prom-node-exporter
+++ b/prom-node-exporter
@@ -142,40 +142,24 @@ if [[ -d /etc/systemd/system ]]; then # we are using systemd
   fi
 
 
-  #why have
-  # this logic to handle both cases: The only differences of the
+  # I used to have logic to handle having the distro package installed, which would then just override it's service file in some ways.  The only differences of the
   # packaged version in t11 is that it creates /var/log/prometheus and a
   # logrotate, but nothing is logged there. And it depends on
-  # prometheus-node-exporter-collectors, which is useful, but that
-  # package itself depends on prometheus-node-exporter. We have no
+  # prometheus-node-exporter-collectors, which is useful, but
+  # depends on prometheus-node-exporter. We would have no
   # reason to install prometheus-node-exporter except that
-  # dependency. We could fix that, but this is easier. So, we keep
-  # handling both cases in case we fix that or maybe run a different
-  # distro that doesn't have it.
-  if [[ -e /lib/systemd/system/prometheus-node-exporter.service ]]; then
-
-    if [[ -e /etc/systemd/system/prometheus.service ]]; then
-      rm -f /etc/systemd/system/prometheus.service
-      sysd_reload=true
-    fi
-
-
-    i /etc/systemd/system/prometheus-node-exporter.service.d/override.conf <<'EOF'
-[Unit]
-# needed to continually restart
-StartLimitIntervalSec=0
+  # dependency. But since the collectors package is just a few
+  # small scripts we don't even currently use, and of course are not
+  # there on old versions, lets not try to use that package, and
+  # just manually install the files we want from upstream.
+  # https://github.com/prometheus-community/node-exporter-textfile-collector-scripts
 
-[Service]
-Restart=always
-# time to sleep before restarting a service
-RestartSec=600
+  if [[ -e /lib/systemd/system/prometheus-node-exporter.service ]]; then
+    apt -y remove --purge prometheus-node-exporter
+    rm -fv /lib/systemd/system/prometheus-node-exporter.service
+  fi
 
-# empty signifies to replace the existing value
-ExecStart=
-ExecStart=/usr/local/bin/prometheus-node-exporter $ARGS
-EOF
-  else # we dont have the distro package installed
-    i /etc/systemd/system/prometheus-node-exporter.service <<'EOF'
+  i /etc/systemd/system/prometheus-node-exporter.service <<'EOF'
 [Unit]
 Description=Prometheus exporter for machine metrics
 Documentation=https://github.com/prometheus/node_exporter
@@ -201,7 +185,6 @@ RestartSec=600
 [Install]
 WantedBy=multi-user.target
 EOF
-  fi
   if $sysd_reload; then
     systemctl daemon-reload
   fi
-- 
2.30.2