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Add Support for Cache and S3 related metrics in Prometheus endpoint (#8591)

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This PR adds support below metrics

- Cache Hit Count
- Cache Miss Count
- Data served from Cache (in Bytes)
- Bytes received from AWS S3
- Bytes sent to AWS S3
- Number of requests sent to AWS S3

Fixes #8549
This commit is contained in:
Nitish Tiwari
2019-12-06 12:46:06 +05:30
committed by Harshavardhana
parent d2dc964cb5
commit 3df7285c3c
32 changed files with 400 additions and 86 deletions
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8
cmd/generic-handlers.go
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@@ -102,7 +102,7 @@ func isHTTPHeaderSizeTooLarge(header http.Header) bool {
length := len(key) + len(header.Get(key))
size += length
for _, prefix := range userMetadataKeyPrefixes {
if hasPrefix(key, prefix) {
if HasPrefix(key, prefix) {
usersize += length
break
}
@@ -141,7 +141,7 @@ func (h reservedMetadataHandler) ServeHTTP(w http.ResponseWriter, r *http.Reques
// and must not set by clients
func containsReservedMetadata(header http.Header) bool {
for key := range header {
if hasPrefix(key, ReservedMetadataPrefix) {
if HasPrefix(key, ReservedMetadataPrefix) {
return true
}
}
@@ -259,8 +259,8 @@ func setBrowserCacheControlHandler(h http.Handler) http.Handler {
func (h cacheControlHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
if r.Method == http.MethodGet && guessIsBrowserReq(r) {
// For all browser requests set appropriate Cache-Control policies
if hasPrefix(r.URL.Path, minioReservedBucketPath+SlashSeparator) {
if hasSuffix(r.URL.Path, ".js") || r.URL.Path == minioReservedBucketPath+"/favicon.ico" {
if HasPrefix(r.URL.Path, minioReservedBucketPath+SlashSeparator) {
if HasSuffix(r.URL.Path, ".js") || r.URL.Path == minioReservedBucketPath+"/favicon.ico" {
// For assets set cache expiry of one year. For each release, the name
// of the asset name will change and hence it can not be served from cache.
w.Header().Set(xhttp.CacheControl, "max-age=31536000")