fix: run as a Windows service (#9)

README.md

@@ -1,4 +1,5 @@
 # Prometheus SQL Exporter [![Go](https://github.com/burningalchemist/sql_exporter/workflows/Go/badge.svg)](https://github.com/burningalchemist/sql_exporter/actions?query=workflow%3AGo) [![Docker Pulls](https://img.shields.io/docker/pulls/burningalchemist/sql_exporter)](https://hub.docker.com/r/burningalchemist/sql_exporter)
+
 This is a fork of Database agnostic SQL exporter for [Prometheus](https://prometheus.io), created by [@free](https://github.com/free/sql_exporter). The main goal is to bring some maintenance to the project until the original maintainer is back.
 
 ## Overview
@@ -23,19 +24,19 @@ metrics when queried more frequently than the configured interval.
 Get Prometheus SQL Exporter, either as a [packaged release](https://github.com/burningalchemist/sql_exporter/releases/latest), as a [Docker image](https://hub.docker.com/r/burningalchemist/sql_exporter) or
 build it yourself:
 
-```
+```shell
 $ go install github.com/burningalchemist/sql_exporter/cmd/sql_exporter
 ```
 
 then run it from the command line:
 
-```
+```shell
 $ sql_exporter
 ```
 
 Use the `-help` flag to get help information.
 
-```
+```shell
 $ ./sql_exporter -help
 Usage of ./sql_exporter:
   -config.file string
@@ -47,6 +48,28 @@ Usage of ./sql_exporter:
   [...]
 ```
 
+## Run as a Windows service
+
+If you run SQL Exporter from Windows, it might come in handy to register it as a service to avoid interactive sessions. It is **important** to define `-config.file` parameter to load the configuration file. The other settings can be added as well. The registration itself is performed with Powershell or CMD (make sure you run them as Administrator):
+
+Powershell:
+
+```powershell
+New-Service -name "SqlExporterSvc" `
+-BinaryPathName "%SQL_EXPORTER_PATH%\sql_exporter.exe -config.file %SQL_EXPORTER_PATH%\sql_exporter.yml" `
+-StartupType Automatic `
+-DisplayName "SQL Exporter" `
+-Description "SQL Exporter for Prometheus"
+```
+
+CMD:
+
+```shell
+sc.exe create SqlExporterSvc binPath= "%SQL_EXPORTER_PATH%\sql_exporter.exe -config.file %SQL_EXPORTER_PATH%\sql_exporter.yml" start= auto
+```
+
+`%SQL_EXPORTER_PATH%` is a path to the SQL Exporter binary executable. This document assumes that configuration files are in the same location.
+
 ## Configuration
 
 SQL Exporter is deployed alongside the DB server it collects metrics from. If both the exporter and the DB
@@ -78,6 +101,8 @@ global:
   max_connections: 3
   # Maximum number of idle connections to any one target.
   max_idle_connections: 3
+  #Maximum amount of time a connection may be reused to any one target. Infinite by default.
+  max_connection_lifetime: 10m
 
 # The target to monitor and the list of collectors to execute on it.
 target:
@@ -89,7 +114,7 @@ target:
   collectors: [pricing_data_freshness]
 
 # Collector definition files.
-collector_files: 
+collector_files:
   - "*.collector.yml"
 ```
 

VERSION

@@ -1 +1 @@
-0.7.0
+0.7.1

cmd/sql_exporter/main.go

@@ -9,6 +9,7 @@ import (
 
 	"github.com/burningalchemist/sql_exporter"
 	log "github.com/golang/glog"
+	_ "github.com/kardianos/minwinsvc"
 	"github.com/prometheus/client_golang/prometheus"
 	"github.com/prometheus/client_golang/prometheus/promhttp"
 	"github.com/prometheus/common/version"

go.mod

@@ -10,6 +10,7 @@ require (
 	github.com/golang/glog v0.0.0-20160126235308-23def4e6c14b
 	github.com/golang/protobuf v1.4.2
 	github.com/jackc/pgx/v4 v4.8.1
+	github.com/kardianos/minwinsvc v1.0.0
 	github.com/lib/pq v1.8.0
 	github.com/matttproud/golang_protobuf_extensions v1.0.2-0.20181231171920-c182affec369 // indirect
 	github.com/pmezard/go-difflib v1.0.1-0.20181226105442-5d4384ee4fb2 // indirect

go.sum

@@ -216,6 +216,8 @@ github.com/json-iterator/go v1.1.10/go.mod h1:KdQUCv79m/52Kvf8AW2vK1V8akMuk1QjK/
 github.com/jtolds/gls v4.20.0+incompatible/go.mod h1:QJZ7F/aHp+rZTRtaJ1ow/lLfFfVYBRgL+9YlvaHOwJU=
 github.com/julienschmidt/httprouter v1.2.0/go.mod h1:SYymIcj16QtmaHHD7aYtjjsJG7VTCxuUUipMqKk8s4w=
 github.com/julienschmidt/httprouter v1.3.0/go.mod h1:JR6WtHb+2LUe8TCKY3cZOxFyyO8IZAc4RVcycCCAKdM=
+github.com/kardianos/minwinsvc v1.0.0 h1:+JfAi8IBJna0jY2dJGZqi7o15z13JelFIklJCAENALA=
+github.com/kardianos/minwinsvc v1.0.0/go.mod h1:Bgd0oc+D0Qo3bBytmNtyRKVlp85dAloLKhfxanPFFRc=
 github.com/kisielk/errcheck v1.1.0/go.mod h1:EZBBE59ingxPouuu3KfxchcWSUPOHkagtvWXihfKN4Q=
 github.com/kisielk/gotool v1.0.0/go.mod h1:XhKaO+MFFWcvkIS/tQcRk01m1F5IRFswLeQ+oQHNcck=
 github.com/konsorten/go-windows-terminal-sequences v1.0.1/go.mod h1:T0+1ngSBFLxvqU3pZ+m/2kptfBszLMUkC4ZK/EgS/cQ=
@@ -470,6 +472,7 @@ golang.org/x/sys v0.0.0-20200106162015-b016eb3dc98e/go.mod h1:h1NjWce9XRLGQEsW7w
 golang.org/x/sys v0.0.0-20200116001909-b77594299b42/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20200223170610-d5e6a3e2c0ae/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20200323222414-85ca7c5b95cd/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20200602225109-6fdc65e7d980/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20200615200032-f1bc736245b1/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20200625212154-ddb9806d33ae/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20200805065543-0cf7623e9dbd h1:wefLe/3g5tC0FcXw3NneLA5tHgbyouyZlfcSjNfOdgk=