Prometheus monitoring for GitLab Pages

This starts of the prometheus monitoring for GitLab Pages, and
resolves gitlab-org/gitlab-pages#42

Point to check:
- Are the metric names good, keeping Prometheus' conventions in mind?
- Golang, general style etc
- Shouldn't I do some voodoo magic to import this in the library?

1 files changed, 2 insertions, 0 deletions

diff --git a/main.go b/main.go
index 62d28e0e..6238e6eb 100644
--- a/main.go
+++ b/main.go
@@ -27,6 +27,7 @@ func appMain() {
 	var useHTTP2 = flag.Bool("use-http2", true, "Enable HTTP2 support")
 	var pagesRoot = flag.String("pages-root", "shared/pages", "The directory where pages are stored")
 	var pagesDomain = flag.String("pages-domain", "gitlab-example.com", "The domain to serve static pages")
+	var metricsAdress = flag.String("metrics-address", "", "The adress to server metrics to")
 	var daemonUID = flag.Uint("daemon-uid", 0, "Drop privileges to this user")
 	var daemonGID = flag.Uint("daemon-gid", 0, "Drop privileges to this group")
 
@@ -46,6 +47,7 @@ func appMain() {
 	config.Domain = strings.ToLower(*pagesDomain)
 	config.RedirectHTTP = *redirectHTTP
 	config.HTTP2 = *useHTTP2
+	config.MetricsAddress = *metricsAdress
 
 	if *pagesRootCert != "" {
 		config.RootCertificate = readFile(*pagesRootCert)