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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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61
cmd/metrics.go
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@@ -167,7 +167,6 @@ func (c *minioCollector) Collect(ch chan<- prometheus.Metric) {
}
connStats := globalConnStats.toServerConnStats()
httpStats := globalHTTPStats.toServerHTTPStats()
// Network Sent/Received Bytes (internode)
ch <- prometheus.MustNewConstMetric(
@@ -207,6 +206,8 @@ func (c *minioCollector) Collect(ch chan<- prometheus.Metric) {
float64(connStats.S3InputBytes),
)
httpStats := globalHTTPStats.toServerHTTPStats()
for api, value := range httpStats.CurrentS3Requests.APIStats {
ch <- prometheus.MustNewConstMetric(
prometheus.NewDesc(
@@ -243,6 +244,64 @@ func (c *minioCollector) Collect(ch chan<- prometheus.Metric) {
)
}
// Cache related metrics
if globalCacheConfig.Enabled {
ch <- prometheus.MustNewConstMetric(
prometheus.NewDesc(
prometheus.BuildFQName("cache", "hits", "total"),
"Total number of disk cache hits in current MinIO instance",
nil, nil),
prometheus.CounterValue,
float64(newCachedObjectLayerFn().CacheStats().getHits()),
)
ch <- prometheus.MustNewConstMetric(
prometheus.NewDesc(
prometheus.BuildFQName("cache", "misses", "total"),
"Total number of disk cache misses in current MinIO instance",
nil, nil),
prometheus.CounterValue,
float64(newCachedObjectLayerFn().CacheStats().getMisses()),
)
ch <- prometheus.MustNewConstMetric(
prometheus.NewDesc(
prometheus.BuildFQName("cache", "data", "served"),
"Total number of bytes served from cache of current MinIO instance",
nil, nil),
prometheus.CounterValue,
float64(newCachedObjectLayerFn().CacheStats().getBytesServed()),
)
}
if globalIsGateway && globalGatewayName == "s3" {
m, _ := globalObjectAPI.GetMetrics(context.Background())
ch <- prometheus.MustNewConstMetric(
prometheus.NewDesc(
prometheus.BuildFQName("gateway", globalGatewayName, "bytes_received"),
"Total number of bytes received by current MinIO S3 Gateway from AWS S3",
nil, nil),
prometheus.CounterValue,
float64(m.GetBytesReceived()),
)
ch <- prometheus.MustNewConstMetric(
prometheus.NewDesc(
prometheus.BuildFQName("gateway", globalGatewayName, "bytes_sent"),
"Total number of bytes sent by current MinIO S3 Gateway to AWS S3",
nil, nil),
prometheus.CounterValue,
float64(m.GetBytesSent()),
)
for method, count := range m.GetRequests() {
ch <- prometheus.MustNewConstMetric(
prometheus.NewDesc(
prometheus.BuildFQName("gateway", globalGatewayName, "requests"),
"Total number of requests made to AWS S3 by current MinIO S3 Gateway",
[]string{"method"}, nil),
prometheus.CounterValue,
float64(count),
method,
)
}
}
}
func metricsHandler() http.Handler {