prometheus add missing service file

Signed-off-by: monitorbuilder_pel7ppc64bebuilder0 <monitorbuilder@powerel.org>

SOURCES/prometheus.service

@@ -0,0 +1,14 @@
+[Unit]
+Description=Prometheus Server
+Documentation=https://prometheus.io/docs/introduction/overview/
+After=network-online.target
+
+[Service]
+User=prometheus
+Restart=on-failure
+ExecStart=/usr/bin/prometheus \
+            -config.file=/etc/prometheus/prometheus.yml \
+            -storage.local.path=/var/lib/prometheus/
+
+[Install]
+WantedBy=multi-user.target