add linux systemd service

CHANGELOG.md

@@ -30,7 +30,7 @@
 
 * [Feature] Added metrics: `brick duration`, `totalRead`, `totalWrite`
 * [Feature] Extended README doc
-* [Feature] Added status badges for cirlce and travis
+* [Feature] Added status badges for circle and travis
 * [Fix] A lot of formatting, fixing typos and refactoring.
 * [Fix] Fixed warning of golint.
 

README.md

@@ -43,6 +43,15 @@ gotest: run go tests and reformats
 
 **gotest**: runs *vet* and *fmt* go tools
 
+## Run as systemd service
+
+```
+cp gluster_exporter /bin
+cp gluster_exporter.service /etc/systemd/system
+systemctl enable gluster_exporter.service
+systemctl start gluster_exporter.service
+```
+
 ## Relevant Gluster Metrics
 Commands within the exporter are executed with `--xml`.
 

gluster_exporter.service

@@ -0,0 +1,10 @@
+[Unit]
+Description=Gluster Exporter
+After=glusterd.service
+
+[Service]
+ExecStart=/bin/gluster_exporter
+Restart=always
+
+[Install]
+WantedBy=multi-user.target

main.go

@@ -463,7 +463,7 @@ type mount struct {
 	volume     string
 }
 
-// ParseMountOutput pares output of system execution 'mount'
+// ParseMountOutput pairs output of system execution 'mount'
 func parseMountOutput(mountBuffer string) ([]mount, error) {
 	mounts := make([]mount, 0, 2)
 	mountRows := strings.Split(mountBuffer, "\n")