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Add Prometheus metrics

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Exposes a few metrics for Prometheus under /metrics if started with --prometheus.

Example:

    # HELP rest_server_blob_read_bytes_total Total number of bytes read from blobs
    # TYPE rest_server_blob_read_bytes_total counter
    rest_server_blob_read_bytes_total{repo="test",type="data"} 2.13557024e+09
    rest_server_blob_read_bytes_total{repo="test",type="index"} 1.198653e+06
    rest_server_blob_read_bytes_total{repo="test",type="keys"} 5388
    rest_server_blob_read_bytes_total{repo="test",type="locks"} 1975
    rest_server_blob_read_bytes_total{repo="test",type="snapshots"} 10018
    # HELP rest_server_blob_read_total Total number of blobs read
    # TYPE rest_server_blob_read_total counter
    rest_server_blob_read_total{repo="test",type="data"} 3985
    rest_server_blob_read_total{repo="test",type="index"} 21
    rest_server_blob_read_total{repo="test",type="keys"} 12
    rest_server_blob_read_total{repo="test",type="locks"} 12
    rest_server_blob_read_total{repo="test",type="snapshots"} 32
    # HELP rest_server_blob_write_bytes_total Total number of bytes written to blobs
    # TYPE rest_server_blob_write_bytes_total counter
    rest_server_blob_write_bytes_total{repo="test",type="data"} 1.063726179e+09
    rest_server_blob_write_bytes_total{repo="test",type="index"} 395586
    rest_server_blob_write_bytes_total{repo="test",type="locks"} 1975
    rest_server_blob_write_bytes_total{repo="test",type="snapshots"} 1933
    # HELP rest_server_blob_write_total Total number of blobs written
    # TYPE rest_server_blob_write_total counter
    rest_server_blob_write_total{repo="test",type="data"} 226
    rest_server_blob_write_total{repo="test",type="index"} 6
    rest_server_blob_write_total{repo="test",type="locks"} 12
    rest_server_blob_write_total{repo="test",type="snapshots"} 6
This commit is contained in:
Konrad Wojas
2017-10-24 23:03:50 +08:00
committed by Zlatko Čalušić
parent 526a2b3837
commit ca0e09261f
4 changed files with 69 additions and 3 deletions
Download Patch File Download Diff File Expand all files Collapse all files

21
handlers.go
View File

@@ -13,9 +13,10 @@ import (
"path/filepath"
"strings"
"time"
"goji.io/middleware"
"goji.io/pat"
"github.com/miolini/datacounter"
"github.com/prometheus/client_golang/prometheus"
)
func isHashed(dir string) bool {
@@ -317,8 +318,15 @@ func GetBlob(w http.ResponseWriter, r *http.Request) {
return
}
http.ServeContent(w, r, "", time.Unix(0, 0), file)
wc := datacounter.NewResponseWriterCounter(w)
http.ServeContent(wc, r, "", time.Unix(0, 0), file)
file.Close()
if Config.Prometheus {
labels := prometheus.Labels{"repo": getRepo(r), "type": pat.Param(r, "type")}
metricBlobReadTotal.With(labels).Inc()
metricBlobReadBytesTotal.With(labels).Add(float64(wc.Count()))
}
}
// SaveBlob saves a blob to the repository.
@@ -342,7 +350,8 @@ func SaveBlob(w http.ResponseWriter, r *http.Request) {
return
}
if _, err := io.Copy(tf, r.Body); err != nil {
written, err := io.Copy(tf, r.Body)
if err != nil {
tf.Close()
os.Remove(path)
if Config.Debug {
@@ -370,6 +379,12 @@ func SaveBlob(w http.ResponseWriter, r *http.Request) {
http.Error(w, http.StatusText(http.StatusInternalServerError), http.StatusInternalServerError)
return
}
if Config.Prometheus {
labels := prometheus.Labels{"repo": getRepo(r), "type": pat.Param(r, "type")}
metricBlobWriteTotal.With(labels).Inc()
metricBlobWriteBytesTotal.With(labels).Add(float64(written))
}
}
// DeleteBlob deletes a blob from the repository.