[VOL-4291] Rw-core updates for gRPC migration
Change-Id: I8d5a554409115b29318089671ca4e1ab3fa98810
diff --git a/vendor/github.com/coreos/etcd/mvcc/metrics.go b/vendor/github.com/coreos/etcd/mvcc/metrics.go
new file mode 100644
index 0000000..b46fd78
--- /dev/null
+++ b/vendor/github.com/coreos/etcd/mvcc/metrics.go
@@ -0,0 +1,282 @@
+// Copyright 2015 The etcd Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package mvcc
+
+import (
+ "sync"
+
+ "github.com/prometheus/client_golang/prometheus"
+)
+
+var (
+ rangeCounter = prometheus.NewCounter(
+ prometheus.CounterOpts{
+ Namespace: "etcd_debugging",
+ Subsystem: "mvcc",
+ Name: "range_total",
+ Help: "Total number of ranges seen by this member.",
+ })
+
+ putCounter = prometheus.NewCounter(
+ prometheus.CounterOpts{
+ Namespace: "etcd_debugging",
+ Subsystem: "mvcc",
+ Name: "put_total",
+ Help: "Total number of puts seen by this member.",
+ })
+
+ deleteCounter = prometheus.NewCounter(
+ prometheus.CounterOpts{
+ Namespace: "etcd_debugging",
+ Subsystem: "mvcc",
+ Name: "delete_total",
+ Help: "Total number of deletes seen by this member.",
+ })
+
+ txnCounter = prometheus.NewCounter(
+ prometheus.CounterOpts{
+ Namespace: "etcd_debugging",
+ Subsystem: "mvcc",
+ Name: "txn_total",
+ Help: "Total number of txns seen by this member.",
+ })
+
+ keysGauge = prometheus.NewGauge(
+ prometheus.GaugeOpts{
+ Namespace: "etcd_debugging",
+ Subsystem: "mvcc",
+ Name: "keys_total",
+ Help: "Total number of keys.",
+ })
+
+ watchStreamGauge = prometheus.NewGauge(
+ prometheus.GaugeOpts{
+ Namespace: "etcd_debugging",
+ Subsystem: "mvcc",
+ Name: "watch_stream_total",
+ Help: "Total number of watch streams.",
+ })
+
+ watcherGauge = prometheus.NewGauge(
+ prometheus.GaugeOpts{
+ Namespace: "etcd_debugging",
+ Subsystem: "mvcc",
+ Name: "watcher_total",
+ Help: "Total number of watchers.",
+ })
+
+ slowWatcherGauge = prometheus.NewGauge(
+ prometheus.GaugeOpts{
+ Namespace: "etcd_debugging",
+ Subsystem: "mvcc",
+ Name: "slow_watcher_total",
+ Help: "Total number of unsynced slow watchers.",
+ })
+
+ totalEventsCounter = prometheus.NewCounter(
+ prometheus.CounterOpts{
+ Namespace: "etcd_debugging",
+ Subsystem: "mvcc",
+ Name: "events_total",
+ Help: "Total number of events sent by this member.",
+ })
+
+ pendingEventsGauge = prometheus.NewGauge(
+ prometheus.GaugeOpts{
+ Namespace: "etcd_debugging",
+ Subsystem: "mvcc",
+ Name: "pending_events_total",
+ Help: "Total number of pending events to be sent.",
+ })
+
+ indexCompactionPauseDurations = prometheus.NewHistogram(
+ prometheus.HistogramOpts{
+ Namespace: "etcd_debugging",
+ Subsystem: "mvcc",
+ Name: "index_compaction_pause_duration_milliseconds",
+ Help: "Bucketed histogram of index compaction pause duration.",
+ // 0.5ms -> 1second
+ Buckets: prometheus.ExponentialBuckets(0.5, 2, 12),
+ })
+
+ dbCompactionPauseDurations = prometheus.NewHistogram(
+ prometheus.HistogramOpts{
+ Namespace: "etcd_debugging",
+ Subsystem: "mvcc",
+ Name: "db_compaction_pause_duration_milliseconds",
+ Help: "Bucketed histogram of db compaction pause duration.",
+ // 1ms -> 4second
+ Buckets: prometheus.ExponentialBuckets(1, 2, 13),
+ })
+
+ dbCompactionTotalDurations = prometheus.NewHistogram(
+ prometheus.HistogramOpts{
+ Namespace: "etcd_debugging",
+ Subsystem: "mvcc",
+ Name: "db_compaction_total_duration_milliseconds",
+ Help: "Bucketed histogram of db compaction total duration.",
+ // 100ms -> 800second
+ Buckets: prometheus.ExponentialBuckets(100, 2, 14),
+ })
+
+ dbCompactionKeysCounter = prometheus.NewCounter(
+ prometheus.CounterOpts{
+ Namespace: "etcd_debugging",
+ Subsystem: "mvcc",
+ Name: "db_compaction_keys_total",
+ Help: "Total number of db keys compacted.",
+ })
+
+ dbTotalSizeDebugging = prometheus.NewGaugeFunc(prometheus.GaugeOpts{
+ Namespace: "etcd_debugging",
+ Subsystem: "mvcc",
+ Name: "db_total_size_in_bytes",
+ Help: "Total size of the underlying database physically allocated in bytes. Use etcd_mvcc_db_total_size_in_bytes",
+ },
+ func() float64 {
+ reportDbTotalSizeInBytesMu.RLock()
+ defer reportDbTotalSizeInBytesMu.RUnlock()
+ return reportDbTotalSizeInBytes()
+ },
+ )
+ dbTotalSize = prometheus.NewGaugeFunc(prometheus.GaugeOpts{
+ Namespace: "etcd",
+ Subsystem: "mvcc",
+ Name: "db_total_size_in_bytes",
+ Help: "Total size of the underlying database physically allocated in bytes.",
+ },
+ func() float64 {
+ reportDbTotalSizeInBytesMu.RLock()
+ defer reportDbTotalSizeInBytesMu.RUnlock()
+ return reportDbTotalSizeInBytes()
+ },
+ )
+ // overridden by mvcc initialization
+ reportDbTotalSizeInBytesMu sync.RWMutex
+ reportDbTotalSizeInBytes = func() float64 { return 0 }
+
+ dbTotalSizeInUse = prometheus.NewGaugeFunc(prometheus.GaugeOpts{
+ Namespace: "etcd",
+ Subsystem: "mvcc",
+ Name: "db_total_size_in_use_in_bytes",
+ Help: "Total size of the underlying database logically in use in bytes.",
+ },
+ func() float64 {
+ reportDbTotalSizeInUseInBytesMu.RLock()
+ defer reportDbTotalSizeInUseInBytesMu.RUnlock()
+ return reportDbTotalSizeInUseInBytes()
+ },
+ )
+ // overridden by mvcc initialization
+ reportDbTotalSizeInUseInBytesMu sync.RWMutex
+ reportDbTotalSizeInUseInBytes func() float64 = func() float64 { return 0 }
+
+ hashDurations = prometheus.NewHistogram(prometheus.HistogramOpts{
+ Namespace: "etcd",
+ Subsystem: "mvcc",
+ Name: "hash_duration_seconds",
+ Help: "The latency distribution of storage hash operation.",
+
+ // 100 MB usually takes 100 ms, so start with 10 MB of 10 ms
+ // lowest bucket start of upper bound 0.01 sec (10 ms) with factor 2
+ // highest bucket start of 0.01 sec * 2^14 == 163.84 sec
+ Buckets: prometheus.ExponentialBuckets(.01, 2, 15),
+ })
+
+ hashRevDurations = prometheus.NewHistogram(prometheus.HistogramOpts{
+ Namespace: "etcd",
+ Subsystem: "mvcc",
+ Name: "hash_rev_duration_seconds",
+ Help: "The latency distribution of storage hash by revision operation.",
+
+ // 100 MB usually takes 100 ms, so start with 10 MB of 10 ms
+ // lowest bucket start of upper bound 0.01 sec (10 ms) with factor 2
+ // highest bucket start of 0.01 sec * 2^14 == 163.84 sec
+ Buckets: prometheus.ExponentialBuckets(.01, 2, 15),
+ })
+
+ currentRev = prometheus.NewGaugeFunc(prometheus.GaugeOpts{
+ Namespace: "etcd_debugging",
+ Subsystem: "mvcc",
+ Name: "current_revision",
+ Help: "The current revision of store.",
+ },
+ func() float64 {
+ reportCurrentRevMu.RLock()
+ defer reportCurrentRevMu.RUnlock()
+ return reportCurrentRev()
+ },
+ )
+ // overridden by mvcc initialization
+ reportCurrentRevMu sync.RWMutex
+ reportCurrentRev = func() float64 { return 0 }
+
+ compactRev = prometheus.NewGaugeFunc(prometheus.GaugeOpts{
+ Namespace: "etcd_debugging",
+ Subsystem: "mvcc",
+ Name: "compact_revision",
+ Help: "The revision of the last compaction in store.",
+ },
+ func() float64 {
+ reportCompactRevMu.RLock()
+ defer reportCompactRevMu.RUnlock()
+ return reportCompactRev()
+ },
+ )
+ // overridden by mvcc initialization
+ reportCompactRevMu sync.RWMutex
+ reportCompactRev = func() float64 { return 0 }
+
+ totalPutSizeGauge = prometheus.NewGauge(
+ prometheus.GaugeOpts{
+ Namespace: "etcd_debugging",
+ Subsystem: "mvcc",
+ Name: "total_put_size_in_bytes",
+ Help: "The total size of put kv pairs seen by this member.",
+ })
+)
+
+func init() {
+ prometheus.MustRegister(rangeCounter)
+ prometheus.MustRegister(putCounter)
+ prometheus.MustRegister(deleteCounter)
+ prometheus.MustRegister(txnCounter)
+ prometheus.MustRegister(keysGauge)
+ prometheus.MustRegister(watchStreamGauge)
+ prometheus.MustRegister(watcherGauge)
+ prometheus.MustRegister(slowWatcherGauge)
+ prometheus.MustRegister(totalEventsCounter)
+ prometheus.MustRegister(pendingEventsGauge)
+ prometheus.MustRegister(indexCompactionPauseDurations)
+ prometheus.MustRegister(dbCompactionPauseDurations)
+ prometheus.MustRegister(dbCompactionTotalDurations)
+ prometheus.MustRegister(dbCompactionKeysCounter)
+ prometheus.MustRegister(dbTotalSizeDebugging)
+ prometheus.MustRegister(dbTotalSize)
+ prometheus.MustRegister(dbTotalSizeInUse)
+ prometheus.MustRegister(hashDurations)
+ prometheus.MustRegister(hashRevDurations)
+ prometheus.MustRegister(currentRev)
+ prometheus.MustRegister(compactRev)
+ prometheus.MustRegister(totalPutSizeGauge)
+}
+
+// ReportEventReceived reports that an event is received.
+// This function should be called when the external systems received an
+// event from mvcc.Watcher.
+func ReportEventReceived(n int) {
+ pendingEventsGauge.Sub(float64(n))
+ totalEventsCounter.Add(float64(n))
+}