From 24da3c8033dce83ff7a7f4b826fd23cb662b7d5f Mon Sep 17 00:00:00 2001
From: Daniel Neto <daniel.jsilvan@gmail.com>
Date: Tue, 13 Aug 2024 23:32:47 -0300
Subject: [PATCH] Updating deb packaging files

---
 .../unibuild-packaging/deb/control            |  2 +-
 .../deb/perfsonar-host-metrics.install        |  4 ++--
 .../deb/perfsonar-host-metrics.postinst       |  6 ++++--
 .../deb/perfsonar-host-metrics.prerm          | 21 +++++++++++++++++++
 4 files changed, 28 insertions(+), 5 deletions(-)
 create mode 100644 perfsonar-host-metrics/perfsonar-host-metrics/unibuild-packaging/deb/perfsonar-host-metrics.prerm

diff --git a/perfsonar-host-metrics/perfsonar-host-metrics/unibuild-packaging/deb/control b/perfsonar-host-metrics/perfsonar-host-metrics/unibuild-packaging/deb/control
index 084a15d..f975fb1 100644
--- a/perfsonar-host-metrics/perfsonar-host-metrics/unibuild-packaging/deb/control
+++ b/perfsonar-host-metrics/perfsonar-host-metrics/unibuild-packaging/deb/control
@@ -10,7 +10,7 @@ Package: perfsonar-host-metrics
 Architecture: all
 Depends: ${shlibs:Depends}, ${misc:Depends}, prometheus-node-exporter,
  openssl, apache2, apache2-ssl-dev, perfsonar-common, python3-perfsonar-psconfig,
- python3-pscheduler
+ python3-pscheduler, python3, python3-flask, libapache2-mod-wsgi-py3
 Description: Prometheus node-exporter integration with perfSONAR
  A package that installs and sets-up Prometheus node_exporter for a perfSONAR
  to collect and report host metrics.
diff --git a/perfsonar-host-metrics/perfsonar-host-metrics/unibuild-packaging/deb/perfsonar-host-metrics.install b/perfsonar-host-metrics/perfsonar-host-metrics/unibuild-packaging/deb/perfsonar-host-metrics.install
index e01cf0c..6d22aa3 100644
--- a/perfsonar-host-metrics/perfsonar-host-metrics/unibuild-packaging/deb/perfsonar-host-metrics.install
+++ b/perfsonar-host-metrics/perfsonar-host-metrics/unibuild-packaging/deb/perfsonar-host-metrics.install
@@ -1,5 +1,5 @@
 apache-node_exporter.conf /etc/apache2/conf-available/
 apache-perfsonar_host_exporter.conf /etc/apache2/conf-available/
 exporter_opts.sh /usr/lib/perfsonar/host_metrics/
-perfsonar_host_exporter /usr/lib/perfsonar/host_metrics/
-perfsonar-host-exporter.service lib/systemd/system/
\ No newline at end of file
+perfsonar_host_exporter.py /usr/lib/perfsonar/host_metrics/
+host_exporter.wsgi /var/www/html/perfsonar/host_exporter
\ No newline at end of file
diff --git a/perfsonar-host-metrics/perfsonar-host-metrics/unibuild-packaging/deb/perfsonar-host-metrics.postinst b/perfsonar-host-metrics/perfsonar-host-metrics/unibuild-packaging/deb/perfsonar-host-metrics.postinst
index ce11868..670d535 100644
--- a/perfsonar-host-metrics/perfsonar-host-metrics/unibuild-packaging/deb/perfsonar-host-metrics.postinst
+++ b/perfsonar-host-metrics/perfsonar-host-metrics/unibuild-packaging/deb/perfsonar-host-metrics.postinst
@@ -7,6 +7,8 @@ set -e
 
 case "$1" in
     configure)
+        # This link is necessary because the WSGI script imports the application using a path relative to the WSGI config directory.
+        ln -sT -f /usr/lib/perfsonar/host_metrics/ /var/www/html/perfsonar/host_exporter/host_exporter
         # check if installation or update, where version is a parameter
         chmod 755 /usr/lib/perfsonar/host_metrics/perfsonar_host_exporter
         #set node_exporter opts
@@ -16,9 +18,8 @@ case "$1" in
             systemctl daemon-reload || :
             systemctl enable node_exporter.service || :
             systemctl restart node_exporter.service || :
-            systemctl enable perfsonar-host-exporter.service || :
-            systemctl restart perfsonar-host-exporter.service || :
 
+            # Enable and restart apache for wsgi and reverse proxy
             # Apache setup
             if [ -e /usr/share/apache2/apache2-maintscript-helper ]; then
                 . /usr/share/apache2/apache2-maintscript-helper
@@ -27,6 +28,7 @@ case "$1" in
                 apache2_invoke ensite default-ssl
                 apache2_invoke enmod proxy
                 apache2_invoke enmod proxy_http
+                apache2_invoke enconf mod-wsgi
                 apache2_invoke enconf apache-node_exporter
                 apache2_invoke enconf apache-perfsonar_host_exporter
             fi
diff --git a/perfsonar-host-metrics/perfsonar-host-metrics/unibuild-packaging/deb/perfsonar-host-metrics.prerm b/perfsonar-host-metrics/perfsonar-host-metrics/unibuild-packaging/deb/perfsonar-host-metrics.prerm
new file mode 100644
index 0000000..b8102cf
--- /dev/null
+++ b/perfsonar-host-metrics/perfsonar-host-metrics/unibuild-packaging/deb/perfsonar-host-metrics.prerm
@@ -0,0 +1,21 @@
+#!/bin/sh
+# prerm script for perfsonar host metrics
+#
+# see: dh_installdeb(1)
+
+set -e
+
+
+case "$1" in
+    remove|upgrade|deconfigure)
+        if [ -e /usr/share/apache2/apache2-maintscript-helper ]; then
+            . /usr/share/apache2/apache2-maintscript-helper
+            apache2_invoke disconf apache-node_exporter
+            apache2_invoke disconf apache-perfsonar_host_exporter
+        fi
+
+        rm -f /var/www/html/perfsonar/host_exporter/host_exporter
+    ;;
+esac
+
+exit 0
\ No newline at end of file