Add file size metric for disk serving

1 files changed, 7 insertions, 0 deletions

diff --git a/metrics/metrics.go b/metrics/metrics.go
index bb14de04..1950eb77 100644
--- a/metrics/metrics.go
+++ b/metrics/metrics.go
@@ -76,6 +76,12 @@ var (
 		Name: "gitlab_pages_domains_source_api_call_duration",
 		Help: "The time (in seconds) it takes to get a response from the GitLab domains API",
 	}, []string{"status_code"})
+
+	// ServingFileSize metric for file size serving. serving_types: disk and object_storage
+	ServingFileSize = prometheus.NewGaugeVec(prometheus.GaugeOpts{
+		Name: "gitlab_pages_serving_file_size",
+		Help: "The size in bytes for each file that has been served",
+	}, []string{"serving_type", "content_type"})
 )
 
 // MustRegister collectors with the Prometheus client
@@ -93,5 +99,6 @@ func MustRegister() {
 		DomainsSourceFailures,
 		ServerlessRequests,
 		ServerlessLatency,
+		ServingFileSize,
 	)
 }