Add metrics for httprange and trace logs

Add metrics and trace logs

Enables meteredRoundTripper to log response data in a Traceln() call.
It adds a name to the round tripper for easy logging.
Adds two new metrics to be used by the `httprange` package to track
number of requests made to object storage.

Apply 1 suggestion(s) to 1 file(s)

(cherry picked from commit 57a98108c728ba6e6575a95899455d5fac536ae1)

1 files changed, 14 insertions, 0 deletions

diff --git a/metrics/metrics.go b/metrics/metrics.go
index 0792a41f..de4206b5 100644
--- a/metrics/metrics.go
+++ b/metrics/metrics.go
@@ -97,6 +97,18 @@ var (
 		Name: "gitlab_pages_vfs_operations_total",
 		Help: "The number of VFS operations",
 	}, []string{"vfs_name", "operation", "success"})
+
+	// ZipFileServingReqTotal is the number of requests made to Object Storage by zip file serving
+	ZipFileServingReqTotal = prometheus.NewCounterVec(prometheus.CounterOpts{
+		Name: "gitlab_pages_httprange_zip_reader_requests_total",
+		Help: "The number of requests made to Object Storage by zip file serving with different status codes",
+	}, []string{"status_code"})
+
+	// ZipFileServingReqDuration is the time it takes to get a response from Object Storage in seconds for zip file servings
+	ZipFileServingReqDuration = prometheus.NewGaugeVec(prometheus.GaugeOpts{
+		Name: "gitlab_pages_httprange_zip_reader_requests_duration",
+		Help: "The time (in seconds) it takes to get a response from the Object Storage provider for zip file serving",
+	}, []string{"status_code"})
 )
 
 // MustRegister collectors with the Prometheus client
@@ -117,5 +129,7 @@ func MustRegister() {
 		DiskServingFileSize,
 		ServingTime,
 		VFSOperations,
+		ZipFileServingReqTotal,
+		ZipFileServingReqDuration,
 	)
 }