Load proxy config on service start

Add startup script to load proxy config from rhsm.conf
Add script to spec file
Modify ExecStart param of systemd service

contrib/rpm/host-metering.spec.in

@@ -78,6 +78,7 @@ install -m 0755 -vd                     %{buildroot}%{_bindir}
 install -m 0755 -vp $(pwd)/bin/*        %{buildroot}%{_bindir}/
 install -m 0755 -vd                     %{buildroot}%{_unitdir}
 install -m 644 contrib/systemd/host-metering.service %{buildroot}%{_unitdir}/%{name}.service
+install -m 0755 contrib/systemd/host-metering-proxy-setup.sh %{buildroot}%{_bindir}/host-metering-proxy-setup.sh
 install -m 0755 -vd                     %{buildroot}%{_presetdir}
 install -m 644 contrib/systemd/80-host-metering.preset %{buildroot}%{_presetdir}/80-%{name}.preset
 install -m 0755 -vd                     %{buildroot}%{_mandir}/man1

contrib/systemd/host-metering-proxy-setup.sh

@@ -0,0 +1,19 @@
+#!/bin/bash
+
+HTTP_PROXY=""
+HTTPS_PROXY=""
+
+if [ -f /etc/rhsm/rhsm.conf ]; then
+    PROXY_HOSTNAME=$(grep -E '^proxy_hostname\s*=' /etc/rhsm/rhsm.conf | awk -F= '{print $2}' | xargs)
+    PROXY_PORT=$(grep -E '^proxy_port\s*=' /etc/rhsm/rhsm.conf | awk -F= '{print $2}' | xargs)
+
+    if [ -n "$PROXY_HOSTNAME" ] && [ -n "$PROXY_PORT" ]; then
+        HTTP_PROXY="http://$PROXY_HOSTNAME:$PROXY_PORT"
+        HTTPS_PROXY="http://$PROXY_HOSTNAME:$PROXY_PORT"
+    fi
+fi
+
+[ -n "$HTTP_PROXY" ] && export HTTP_PROXY
+[ -n "$HTTPS_PROXY" ] && export HTTPS_PROXY
+
+exec /usr/bin/host-metering daemon

contrib/systemd/host-metering.service

@@ -6,10 +6,10 @@ After=network-online.target
 [Service]
 Type=simple
 Environment=LC_ALL=C.UTF-8
-ExecStart=/usr/bin/host-metering daemon
+ExecStart=/usr/bin/host-metering-proxy-setup.sh
 ExecReload=/usr/bin/kill -HUP $MAINPID
 
 Restart=always
 
 [Install]
-WantedBy=multi-user.target
+WantedBy=multi-user.target