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Merge pull request #64 from prometheus/document-logging

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Document logging
This commit is contained in:
Tobias Schmidt 2015-04-16 15:42:07 -04:00
parent e4fd929305 626900fe21
commit cb125472c5
3 changed files with 13 additions and 0 deletions
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1
Makefile
View file

@ -13,5 +13,6 @@
VERSION := 0.8.0 VERSION := 0.8.0
TARGET := node_exporter TARGET := node_exporter
GOFLAGS := -ldflags "-X main.Version $(VERSION)"
include Makefile.COMMON include Makefile.COMMON

6
README.md
View file

@ -10,6 +10,12 @@ collectors.
make make
./node_exporter <flags> ./node_exporter <flags>
The node_exporter uses the [glog][glog] library for logging. With the default
parameters, nothing will be logged. Use `-logtostderr` to enable logging to
stderr and `--help` to see more options about logging.
[glog]: https://godoc.org/github.com/golang/glog
## Running tests ## Running tests
make test make test

6
node_exporter.go
View file

@ -22,6 +22,9 @@ import (
const subsystem = "exporter" const subsystem = "exporter"
var ( var (
// set at build time
Version = "0.0.0.dev"
configFile = flag.String("config.file", "", "Path to config file.") configFile = flag.String("config.file", "", "Path to config file.")
memProfile = flag.String("debug.memprofile-file", "", "Write memory profile to this file upon receipt of SIGUSR1.") memProfile = flag.String("debug.memprofile-file", "", "Write memory profile to this file upon receipt of SIGUSR1.")
listenAddress = flag.String("web.listen-address", ":9100", "Address on which to expose metrics and web interface.") listenAddress = flag.String("web.listen-address", ":9100", "Address on which to expose metrics and web interface.")
@ -137,6 +140,7 @@ func loadCollectors(file string) (map[string]collector.Collector, error) {
func main() { func main() {
flag.Parse() flag.Parse()
if *printCollectors { if *printCollectors {
fmt.Printf("Available collectors:\n") fmt.Printf("Available collectors:\n")
for n, _ := range collector.Factories { for n, _ := range collector.Factories {
@ -182,6 +186,8 @@ func main() {
</body> </body>
</html>`)) </html>`))
}) })
glog.Infof("Starting node_exporter v%s at %s", Version, *listenAddress)
err = http.ListenAndServe(*listenAddress, nil) err = http.ListenAndServe(*listenAddress, nil)
if err != nil { if err != nil {
glog.Fatal(err) glog.Fatal(err)