From 8d24867044ffb5472487a878ad4e9c54ff83a759 Mon Sep 17 00:00:00 2001
From: "cilium-renovate[bot]"
 <134692979+cilium-renovate[bot]@users.noreply.github.com>
Date: Wed, 11 Sep 2024 19:12:37 +0000
Subject: [PATCH] fix(deps): update all go dependencies main

Signed-off-by: cilium-renovate[bot] <134692979+cilium-renovate[bot]@users.noreply.github.com>
---
 api/go.mod                                    |  2 +-
 api/go.sum                                    |  4 +-
 .../grpc/experimental/stats/metricregistry.go | 11 +--
 .../grpc/internal/internal.go                 |  7 +-
 .../grpc/mem/buffer_slice.go                  | 12 ++-
 api/vendor/google.golang.org/grpc/server.go   |  1 +
 api/vendor/google.golang.org/grpc/version.go  |  2 +-
 api/vendor/modules.txt                        |  2 +-
 go.mod                                        |  6 +-
 go.sum                                        | 12 +--
 .../client_golang/prometheus/histogram.go     | 92 +++++++++++++------
 .../grpc/experimental/stats/metricregistry.go | 11 +--
 .../grpc/internal/internal.go                 |  7 +-
 .../grpc/mem/buffer_slice.go                  | 12 ++-
 vendor/google.golang.org/grpc/server.go       |  1 +
 vendor/google.golang.org/grpc/version.go      |  2 +-
 vendor/modules.txt                            |  6 +-
 17 files changed, 116 insertions(+), 74 deletions(-)

diff --git a/api/go.mod b/api/go.mod
index 9ceccc27a18..0f31c7a7512 100644
--- a/api/go.mod
+++ b/api/go.mod
@@ -9,7 +9,7 @@ require (
 	github.com/cilium/tetragon v0.0.0-00010101000000-000000000000
 	github.com/sirupsen/logrus v1.9.3
 	github.com/stretchr/testify v1.9.0
-	google.golang.org/grpc v1.66.0
+	google.golang.org/grpc v1.66.2
 	google.golang.org/protobuf v1.34.2
 	sigs.k8s.io/yaml v1.4.0
 )
diff --git a/api/go.sum b/api/go.sum
index 0db94debe63..26a22890be6 100644
--- a/api/go.sum
+++ b/api/go.sum
@@ -32,8 +32,8 @@ golang.org/x/text v0.17.0 h1:XtiM5bkSOt+ewxlOE/aE/AKEHibwj/6gvWMl9Rsh0Qc=
 golang.org/x/text v0.17.0/go.mod h1:BuEKDfySbSR4drPmRPG/7iBdf8hvFMuRexcpahXilzY=
 google.golang.org/genproto/googleapis/rpc v0.0.0-20240701130421-f6361c86f094 h1:BwIjyKYGsK9dMCBOorzRri8MQwmi7mT9rGHsCEinZkA=
 google.golang.org/genproto/googleapis/rpc v0.0.0-20240701130421-f6361c86f094/go.mod h1:Ue6ibwXGpU+dqIcODieyLOcgj7z8+IcskoNIgZxtrFY=
-google.golang.org/grpc v1.66.0 h1:DibZuoBznOxbDQxRINckZcUvnCEvrW9pcWIE2yF9r1c=
-google.golang.org/grpc v1.66.0/go.mod h1:s3/l6xSSCURdVfAnL+TqCNMyTDAGN6+lZeVxnZR128Y=
+google.golang.org/grpc v1.66.2 h1:3QdXkuq3Bkh7w+ywLdLvM56cmGvQHUMZpiCzt6Rqaoo=
+google.golang.org/grpc v1.66.2/go.mod h1:s3/l6xSSCURdVfAnL+TqCNMyTDAGN6+lZeVxnZR128Y=
 google.golang.org/protobuf v1.34.2 h1:6xV6lTsCfpGD21XK49h7MhtcApnLqkfYgPcdHftf6hg=
 google.golang.org/protobuf v1.34.2/go.mod h1:qYOHts0dSfpeUzUFpOMr/WGzszTmLH+DiWniOlNbLDw=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
diff --git a/api/vendor/google.golang.org/grpc/experimental/stats/metricregistry.go b/api/vendor/google.golang.org/grpc/experimental/stats/metricregistry.go
index 930140f57ed..1d827dd5d9d 100644
--- a/api/vendor/google.golang.org/grpc/experimental/stats/metricregistry.go
+++ b/api/vendor/google.golang.org/grpc/experimental/stats/metricregistry.go
@@ -20,7 +20,6 @@ package stats
 
 import (
 	"maps"
-	"testing"
 
 	"google.golang.org/grpc/grpclog"
 	"google.golang.org/grpc/internal"
@@ -250,9 +249,9 @@ func RegisterInt64Gauge(descriptor MetricDescriptor) *Int64GaugeHandle {
 }
 
 // snapshotMetricsRegistryForTesting snapshots the global data of the metrics
-// registry. Registers a cleanup function on the provided testing.T that sets
-// the metrics registry to its original state. Only called in testing functions.
-func snapshotMetricsRegistryForTesting(t *testing.T) {
+// registry. Returns a cleanup function that sets the metrics registry to its
+// original state.
+func snapshotMetricsRegistryForTesting() func() {
 	oldDefaultMetrics := DefaultMetrics
 	oldRegisteredMetrics := registeredMetrics
 	oldMetricsRegistry := metricsRegistry
@@ -262,9 +261,9 @@ func snapshotMetricsRegistryForTesting(t *testing.T) {
 	maps.Copy(registeredMetrics, registeredMetrics)
 	maps.Copy(metricsRegistry, metricsRegistry)
 
-	t.Cleanup(func() {
+	return func() {
 		DefaultMetrics = oldDefaultMetrics
 		registeredMetrics = oldRegisteredMetrics
 		metricsRegistry = oldMetricsRegistry
-	})
+	}
 }
diff --git a/api/vendor/google.golang.org/grpc/internal/internal.go b/api/vendor/google.golang.org/grpc/internal/internal.go
index 65f936a623a..73fa407b6c8 100644
--- a/api/vendor/google.golang.org/grpc/internal/internal.go
+++ b/api/vendor/google.golang.org/grpc/internal/internal.go
@@ -217,10 +217,9 @@ var (
 	SetConnectedAddress any // func(scs *SubConnState, addr resolver.Address)
 
 	// SnapshotMetricRegistryForTesting snapshots the global data of the metric
-	// registry. Registers a cleanup function on the provided testing.T that
-	// sets the metric registry to its original state. Only called in testing
-	// functions.
-	SnapshotMetricRegistryForTesting any // func(t *testing.T)
+	// registry. Returns a cleanup function that sets the metric registry to its
+	// original state. Only called in testing functions.
+	SnapshotMetricRegistryForTesting func() func()
 
 	// SetDefaultBufferPoolForTesting updates the default buffer pool, for
 	// testing purposes.
diff --git a/api/vendor/google.golang.org/grpc/mem/buffer_slice.go b/api/vendor/google.golang.org/grpc/mem/buffer_slice.go
index d7775cea623..228e9c2f20f 100644
--- a/api/vendor/google.golang.org/grpc/mem/buffer_slice.go
+++ b/api/vendor/google.golang.org/grpc/mem/buffer_slice.go
@@ -19,7 +19,6 @@
 package mem
 
 import (
-	"compress/flate"
 	"io"
 )
 
@@ -92,9 +91,11 @@ func (s BufferSlice) Materialize() []byte {
 }
 
 // MaterializeToBuffer functions like Materialize except that it writes the data
-// to a single Buffer pulled from the given BufferPool. As a special case, if the
-// input BufferSlice only actually has one Buffer, this function has nothing to
-// do and simply returns said Buffer.
+// to a single Buffer pulled from the given BufferPool.
+//
+// As a special case, if the input BufferSlice only actually has one Buffer, this
+// function simply increases the refcount before returning said Buffer. Freeing this
+// buffer won't release it until the BufferSlice is itself released.
 func (s BufferSlice) MaterializeToBuffer(pool BufferPool) Buffer {
 	if len(s) == 1 {
 		s[0].Ref()
@@ -124,7 +125,8 @@ func (s BufferSlice) Reader() Reader {
 // Remaining(), which returns the number of unread bytes remaining in the slice.
 // Buffers will be freed as they are read.
 type Reader interface {
-	flate.Reader
+	io.Reader
+	io.ByteReader
 	// Close frees the underlying BufferSlice and never returns an error. Subsequent
 	// calls to Read will return (0, io.EOF).
 	Close() error
diff --git a/api/vendor/google.golang.org/grpc/server.go b/api/vendor/google.golang.org/grpc/server.go
index 457d27338f7..d1e1415a40f 100644
--- a/api/vendor/google.golang.org/grpc/server.go
+++ b/api/vendor/google.golang.org/grpc/server.go
@@ -1359,6 +1359,7 @@ func (s *Server) processUnaryRPC(ctx context.Context, t transport.ServerTranspor
 		}
 		return err
 	}
+	defer d.Free()
 	if channelz.IsOn() {
 		t.IncrMsgRecv()
 	}
diff --git a/api/vendor/google.golang.org/grpc/version.go b/api/vendor/google.golang.org/grpc/version.go
index 1ffec6e2cee..7c70005d083 100644
--- a/api/vendor/google.golang.org/grpc/version.go
+++ b/api/vendor/google.golang.org/grpc/version.go
@@ -19,4 +19,4 @@
 package grpc
 
 // Version is the current grpc version.
-const Version = "1.66.0"
+const Version = "1.66.2"
diff --git a/api/vendor/modules.txt b/api/vendor/modules.txt
index 650997bb997..54163a67867 100644
--- a/api/vendor/modules.txt
+++ b/api/vendor/modules.txt
@@ -37,7 +37,7 @@ golang.org/x/text/unicode/norm
 # google.golang.org/genproto/googleapis/rpc v0.0.0-20240701130421-f6361c86f094
 ## explicit; go 1.20
 google.golang.org/genproto/googleapis/rpc/status
-# google.golang.org/grpc v1.66.0
+# google.golang.org/grpc v1.66.2
 ## explicit; go 1.21
 google.golang.org/grpc
 google.golang.org/grpc/attributes
diff --git a/go.mod b/go.mod
index 0c97f01c027..06fc3c0ea42 100644
--- a/go.mod
+++ b/go.mod
@@ -22,12 +22,12 @@ require (
 	github.com/grpc-ecosystem/go-grpc-middleware/providers/prometheus v1.0.1
 	github.com/hashicorp/golang-lru/v2 v2.0.7
 	github.com/iancoleman/strcase v0.3.0
-	github.com/isovalent/metricstool v0.1.0
+	github.com/isovalent/metricstool v0.1.1
 	github.com/jpillora/longestcommon v0.0.0-20161227235612-adb9d91ee629
 	github.com/kballard/go-shellquote v0.0.0-20180428030007-95032a82bc51
 	github.com/mennanov/fieldmask-utils v1.1.2
 	github.com/opencontainers/runtime-spec v1.2.0
-	github.com/prometheus/client_golang v1.20.2
+	github.com/prometheus/client_golang v1.20.3
 	github.com/prometheus/client_model v0.6.1
 	github.com/prometheus/procfs v0.15.1
 	github.com/sirupsen/logrus v1.9.3
@@ -44,7 +44,7 @@ require (
 	golang.org/x/sync v0.8.0
 	golang.org/x/sys v0.24.0
 	golang.org/x/time v0.6.0
-	google.golang.org/grpc v1.66.0
+	google.golang.org/grpc v1.66.2
 	google.golang.org/protobuf v1.34.2
 	gopkg.in/yaml.v3 v3.0.1
 	k8s.io/api v0.29.8
diff --git a/go.sum b/go.sum
index 9e26081bc0d..bfba271f31c 100644
--- a/go.sum
+++ b/go.sum
@@ -318,8 +318,8 @@ github.com/imdario/mergo v0.3.16 h1:wwQJbIsHYGMUyLSPrEq1CT16AhnhNJQ51+4fdHUnCl4=
 github.com/imdario/mergo v0.3.16/go.mod h1:WBLT9ZmE3lPoWsEzCh9LPo3TiwVN+ZKEjmz+hD27ysY=
 github.com/inconshreveable/mousetrap v1.1.0 h1:wN+x4NVGpMsO7ErUn/mUI3vEoE6Jt13X2s0bqwp9tc8=
 github.com/inconshreveable/mousetrap v1.1.0/go.mod h1:vpF70FUmC8bwa3OWnCshd2FqLfsEA9PFc4w1p2J65bw=
-github.com/isovalent/metricstool v0.1.0 h1:0PcgRzEKPOfqAWte0gJ9WvqfnaflXK00zop098DdMlk=
-github.com/isovalent/metricstool v0.1.0/go.mod h1:k4H0NE60X59E1HzGdpCBeh5RxAAUHVfvtEAgeKLCyPo=
+github.com/isovalent/metricstool v0.1.1 h1:iXwUEEcIvxSjC+IJI64q/tyvZDpYFc7o9Oa9ws7D1Jg=
+github.com/isovalent/metricstool v0.1.1/go.mod h1:QitmtxWp1tC0hju/FTUtznjGE1DWg3g5KV6Avuq0NPs=
 github.com/jbenet/go-context v0.0.0-20150711004518-d14ea06fba99 h1:BQSFePA1RWJOlocH6Fxy8MmwDt+yVQYULKfN0RoTN8A=
 github.com/jbenet/go-context v0.0.0-20150711004518-d14ea06fba99/go.mod h1:1lJo3i6rXxKeerYnT8Nvf0QmHCRC1n8sfWVwXF2Frvo=
 github.com/josharian/intern v1.0.0 h1:vlS4z54oSdjm0bgjRigI+G1HpF+tI+9rE5LLzOg8HmY=
@@ -463,8 +463,8 @@ github.com/power-devops/perfstat v0.0.0-20210106213030-5aafc221ea8c/go.mod h1:Om
 github.com/prometheus/client_golang v0.9.1/go.mod h1:7SWBe2y4D6OKWSNQJUaRYU/AaXPKyh/dDVn+NZz0KFw=
 github.com/prometheus/client_golang v1.0.0/go.mod h1:db9x61etRT2tGnBNRi70OPL5FsnadC4Ky3P0J6CfImo=
 github.com/prometheus/client_golang v1.4.0/go.mod h1:e9GMxYsXl05ICDXkRhurwBS4Q3OK1iX/F2sw+iXX5zU=
-github.com/prometheus/client_golang v1.20.2 h1:5ctymQzZlyOON1666svgwn3s6IKWgfbjsejTMiXIyjg=
-github.com/prometheus/client_golang v1.20.2/go.mod h1:PIEt8X02hGcP8JWbeHyeZ53Y/jReSnHgO035n//V5WE=
+github.com/prometheus/client_golang v1.20.3 h1:oPksm4K8B+Vt35tUhw6GbSNSgVlVSBH0qELP/7u83l4=
+github.com/prometheus/client_golang v1.20.3/go.mod h1:PIEt8X02hGcP8JWbeHyeZ53Y/jReSnHgO035n//V5WE=
 github.com/prometheus/client_model v0.0.0-20180712105110-5c3871d89910/go.mod h1:MbSGuTsp3dbXC40dX6PRTWyKYBIrTGTE9sqQNg2J8bo=
 github.com/prometheus/client_model v0.0.0-20190129233127-fd36f4220a90/go.mod h1:xMI15A0UPsDsEKsMN9yxemIoYk6Tm2C1GtYGdfGttqA=
 github.com/prometheus/client_model v0.0.0-20190812154241-14fe0d1b01d4/go.mod h1:xMI15A0UPsDsEKsMN9yxemIoYk6Tm2C1GtYGdfGttqA=
@@ -755,8 +755,8 @@ google.golang.org/grpc v1.27.0/go.mod h1:qbnxyOmOxrQa7FizSgH+ReBfzJrCY1pSN7KXBS8
 google.golang.org/grpc v1.33.1/go.mod h1:fr5YgcSWrqhRRxogOsw7RzIpsmvOZ6IcH4kBYTpR3n0=
 google.golang.org/grpc v1.36.0/go.mod h1:qjiiYl8FncCW8feJPdyg3v6XW24KsRHe+dy9BAGRRjU=
 google.golang.org/grpc v1.46.2/go.mod h1:vN9eftEi1UMyUsIF80+uQXhHjbXYbm0uXoFCACuMGWk=
-google.golang.org/grpc v1.66.0 h1:DibZuoBznOxbDQxRINckZcUvnCEvrW9pcWIE2yF9r1c=
-google.golang.org/grpc v1.66.0/go.mod h1:s3/l6xSSCURdVfAnL+TqCNMyTDAGN6+lZeVxnZR128Y=
+google.golang.org/grpc v1.66.2 h1:3QdXkuq3Bkh7w+ywLdLvM56cmGvQHUMZpiCzt6Rqaoo=
+google.golang.org/grpc v1.66.2/go.mod h1:s3/l6xSSCURdVfAnL+TqCNMyTDAGN6+lZeVxnZR128Y=
 google.golang.org/protobuf v0.0.0-20200109180630-ec00e32a8dfd/go.mod h1:DFci5gLYBciE7Vtevhsrf46CRTquxDuWsQurQQe4oz8=
 google.golang.org/protobuf v0.0.0-20200221191635-4d8936d0db64/go.mod h1:kwYJMbMJ01Woi6D6+Kah6886xMZcty6N08ah7+eCXa0=
 google.golang.org/protobuf v0.0.0-20200228230310-ab0ca4ff8a60/go.mod h1:cfTl7dwQJ+fmap5saPgwCLgHXTUD7jkjRqWcaiX5VyM=
diff --git a/vendor/github.com/prometheus/client_golang/prometheus/histogram.go b/vendor/github.com/prometheus/client_golang/prometheus/histogram.go
index 8d35f2d8ae9..8a4f49a4c54 100644
--- a/vendor/github.com/prometheus/client_golang/prometheus/histogram.go
+++ b/vendor/github.com/prometheus/client_golang/prometheus/histogram.go
@@ -1658,7 +1658,10 @@ func addAndResetCounts(hot, cold *histogramCounts) {
 type nativeExemplars struct {
 	sync.Mutex
 
-	ttl       time.Duration
+	// Time-to-live for exemplars, it is set to -1 if exemplars are disabled, that is NativeHistogramMaxExemplars is below 0.
+	// The ttl is used on insertion to remove an exemplar that is older than ttl, if present.
+	ttl time.Duration
+
 	exemplars []*dto.Exemplar
 }
 
@@ -1673,6 +1676,7 @@ func makeNativeExemplars(ttl time.Duration, maxCount int) nativeExemplars {
 
 	if maxCount < 0 {
 		maxCount = 0
+		ttl = -1
 	}
 
 	return nativeExemplars{
@@ -1682,20 +1686,18 @@ func makeNativeExemplars(ttl time.Duration, maxCount int) nativeExemplars {
 }
 
 func (n *nativeExemplars) addExemplar(e *dto.Exemplar) {
-	if cap(n.exemplars) == 0 {
+	if n.ttl == -1 {
 		return
 	}
 
 	n.Lock()
 	defer n.Unlock()
 
-	// The index where to insert the new exemplar.
-	var nIdx int = -1
-
 	// When the number of exemplars has not yet exceeded or
 	// is equal to cap(n.exemplars), then
 	// insert the new exemplar directly.
 	if len(n.exemplars) < cap(n.exemplars) {
+		var nIdx int
 		for nIdx = 0; nIdx < len(n.exemplars); nIdx++ {
 			if *e.Value < *n.exemplars[nIdx].Value {
 				break
@@ -1705,17 +1707,46 @@ func (n *nativeExemplars) addExemplar(e *dto.Exemplar) {
 		return
 	}
 
+	if len(n.exemplars) == 1 {
+		// When the number of exemplars is 1, then
+		// replace the existing exemplar with the new exemplar.
+		n.exemplars[0] = e
+		return
+	}
+	// From this point on, the number of exemplars is greater than 1.
+
 	// When the number of exemplars exceeds the limit, remove one exemplar.
 	var (
-		rIdx int // The index where to remove the old exemplar.
-
-		ot    = time.Now() // Oldest timestamp seen.
-		otIdx = -1         // Index of the exemplar with the oldest timestamp.
-
-		md    = -1.0  // Logarithm of the delta of the closest pair of exemplars.
-		mdIdx = -1    // Index of the older exemplar within the closest pair.
-		cLog  float64 // Logarithm of the current exemplar.
-		pLog  float64 // Logarithm of the previous exemplar.
+		ot    = time.Time{} // Oldest timestamp seen. Initial value doesn't matter as we replace it due to otIdx == -1 in the loop.
+		otIdx = -1          // Index of the exemplar with the oldest timestamp.
+
+		md = -1.0 // Logarithm of the delta of the closest pair of exemplars.
+
+		// The insertion point of the new exemplar in the exemplars slice after insertion.
+		// This is calculated purely based on the order of the exemplars by value.
+		// nIdx == len(n.exemplars) means the new exemplar is to be inserted after the end.
+		nIdx = -1
+
+		// rIdx is ultimately the index for the exemplar that we are replacing with the new exemplar.
+		// The aim is to keep a good spread of exemplars by value and not let them bunch up too much.
+		// It is calculated in 3 steps:
+		//   1. First we set rIdx to the index of the older exemplar within the closest pair by value.
+		//      That is the following will be true (on log scale):
+		//      either the exemplar pair on index (rIdx-1, rIdx) or (rIdx, rIdx+1) will have
+		//      the closest values to each other from all pairs.
+		//      For example, suppose the values are distributed like this:
+		//        |-----------x-------------x----------------x----x-----|
+		//                                                   ^--rIdx as this is older.
+		//      Or like this:
+		//        |-----------x-------------x----------------x----x-----|
+		//                                                        ^--rIdx as this is older.
+		//   2. If there is an exemplar that expired, then we simple reset rIdx to that index.
+		//   3. We check if by inserting the new exemplar we would create a closer pair at
+		//      (nIdx-1, nIdx) or (nIdx, nIdx+1) and set rIdx to nIdx-1 or nIdx accordingly to
+		//      keep the spread of exemplars by value; otherwise we keep rIdx as it is.
+		rIdx = -1
+		cLog float64 // Logarithm of the current exemplar.
+		pLog float64 // Logarithm of the previous exemplar.
 	)
 
 	for i, exemplar := range n.exemplars {
@@ -1726,7 +1757,7 @@ func (n *nativeExemplars) addExemplar(e *dto.Exemplar) {
 		}
 
 		// Find the index at which to insert new the exemplar.
-		if *e.Value <= *exemplar.Value && nIdx == -1 {
+		if nIdx == -1 && *e.Value <= *exemplar.Value {
 			nIdx = i
 		}
 
@@ -1738,11 +1769,13 @@ func (n *nativeExemplars) addExemplar(e *dto.Exemplar) {
 		}
 		diff := math.Abs(cLog - pLog)
 		if md == -1 || diff < md {
+			// The closest exemplar pair is at index: i-1, i.
+			// Choose the exemplar with the older timestamp for replacement.
 			md = diff
 			if n.exemplars[i].Timestamp.AsTime().Before(n.exemplars[i-1].Timestamp.AsTime()) {
-				mdIdx = i
+				rIdx = i
 			} else {
-				mdIdx = i - 1
+				rIdx = i - 1
 			}
 		}
 
@@ -1753,8 +1786,12 @@ func (n *nativeExemplars) addExemplar(e *dto.Exemplar) {
 	if nIdx == -1 {
 		nIdx = len(n.exemplars)
 	}
+	// Here, we have the following relationships:
+	// n.exemplars[nIdx-1].Value < e.Value (if nIdx > 0)
+	// e.Value <= n.exemplars[nIdx].Value (if nIdx < len(n.exemplars))
 
 	if otIdx != -1 && e.Timestamp.AsTime().Sub(ot) > n.ttl {
+		// If the oldest exemplar has expired, then replace it with the new exemplar.
 		rIdx = otIdx
 	} else {
 		// In the previous for loop, when calculating the closest pair of exemplars,
@@ -1764,23 +1801,26 @@ func (n *nativeExemplars) addExemplar(e *dto.Exemplar) {
 		if nIdx > 0 {
 			diff := math.Abs(elog - math.Log(n.exemplars[nIdx-1].GetValue()))
 			if diff < md {
+				// The value we are about to insert is closer to the previous exemplar at the insertion point than what we calculated before in rIdx.
+				//                                            v--rIdx
+				// |-----------x-n-----------x----------------x----x-----|
+				//     nIdx-1--^ ^--new exemplar value
+				// Do not make the spread worse, replace nIdx-1 and not rIdx.
 				md = diff
-				mdIdx = nIdx
-				if n.exemplars[nIdx-1].Timestamp.AsTime().Before(e.Timestamp.AsTime()) {
-					mdIdx = nIdx - 1
-				}
+				rIdx = nIdx - 1
 			}
 		}
 		if nIdx < len(n.exemplars) {
 			diff := math.Abs(math.Log(n.exemplars[nIdx].GetValue()) - elog)
 			if diff < md {
-				mdIdx = nIdx
-				if n.exemplars[nIdx].Timestamp.AsTime().Before(e.Timestamp.AsTime()) {
-					mdIdx = nIdx
-				}
+				// The value we are about to insert is closer to the next exemplar at the insertion point than what we calculated before in rIdx.
+				//                                            v--rIdx
+				// |-----------x-----------n-x----------------x----x-----|
+				//     new exemplar value--^ ^--nIdx
+				// Do not make the spread worse, replace nIdx-1 and not rIdx.
+				rIdx = nIdx
 			}
 		}
-		rIdx = mdIdx
 	}
 
 	// Adjust the slice according to rIdx and nIdx.
diff --git a/vendor/google.golang.org/grpc/experimental/stats/metricregistry.go b/vendor/google.golang.org/grpc/experimental/stats/metricregistry.go
index 930140f57ed..1d827dd5d9d 100644
--- a/vendor/google.golang.org/grpc/experimental/stats/metricregistry.go
+++ b/vendor/google.golang.org/grpc/experimental/stats/metricregistry.go
@@ -20,7 +20,6 @@ package stats
 
 import (
 	"maps"
-	"testing"
 
 	"google.golang.org/grpc/grpclog"
 	"google.golang.org/grpc/internal"
@@ -250,9 +249,9 @@ func RegisterInt64Gauge(descriptor MetricDescriptor) *Int64GaugeHandle {
 }
 
 // snapshotMetricsRegistryForTesting snapshots the global data of the metrics
-// registry. Registers a cleanup function on the provided testing.T that sets
-// the metrics registry to its original state. Only called in testing functions.
-func snapshotMetricsRegistryForTesting(t *testing.T) {
+// registry. Returns a cleanup function that sets the metrics registry to its
+// original state.
+func snapshotMetricsRegistryForTesting() func() {
 	oldDefaultMetrics := DefaultMetrics
 	oldRegisteredMetrics := registeredMetrics
 	oldMetricsRegistry := metricsRegistry
@@ -262,9 +261,9 @@ func snapshotMetricsRegistryForTesting(t *testing.T) {
 	maps.Copy(registeredMetrics, registeredMetrics)
 	maps.Copy(metricsRegistry, metricsRegistry)
 
-	t.Cleanup(func() {
+	return func() {
 		DefaultMetrics = oldDefaultMetrics
 		registeredMetrics = oldRegisteredMetrics
 		metricsRegistry = oldMetricsRegistry
-	})
+	}
 }
diff --git a/vendor/google.golang.org/grpc/internal/internal.go b/vendor/google.golang.org/grpc/internal/internal.go
index 65f936a623a..73fa407b6c8 100644
--- a/vendor/google.golang.org/grpc/internal/internal.go
+++ b/vendor/google.golang.org/grpc/internal/internal.go
@@ -217,10 +217,9 @@ var (
 	SetConnectedAddress any // func(scs *SubConnState, addr resolver.Address)
 
 	// SnapshotMetricRegistryForTesting snapshots the global data of the metric
-	// registry. Registers a cleanup function on the provided testing.T that
-	// sets the metric registry to its original state. Only called in testing
-	// functions.
-	SnapshotMetricRegistryForTesting any // func(t *testing.T)
+	// registry. Returns a cleanup function that sets the metric registry to its
+	// original state. Only called in testing functions.
+	SnapshotMetricRegistryForTesting func() func()
 
 	// SetDefaultBufferPoolForTesting updates the default buffer pool, for
 	// testing purposes.
diff --git a/vendor/google.golang.org/grpc/mem/buffer_slice.go b/vendor/google.golang.org/grpc/mem/buffer_slice.go
index d7775cea623..228e9c2f20f 100644
--- a/vendor/google.golang.org/grpc/mem/buffer_slice.go
+++ b/vendor/google.golang.org/grpc/mem/buffer_slice.go
@@ -19,7 +19,6 @@
 package mem
 
 import (
-	"compress/flate"
 	"io"
 )
 
@@ -92,9 +91,11 @@ func (s BufferSlice) Materialize() []byte {
 }
 
 // MaterializeToBuffer functions like Materialize except that it writes the data
-// to a single Buffer pulled from the given BufferPool. As a special case, if the
-// input BufferSlice only actually has one Buffer, this function has nothing to
-// do and simply returns said Buffer.
+// to a single Buffer pulled from the given BufferPool.
+//
+// As a special case, if the input BufferSlice only actually has one Buffer, this
+// function simply increases the refcount before returning said Buffer. Freeing this
+// buffer won't release it until the BufferSlice is itself released.
 func (s BufferSlice) MaterializeToBuffer(pool BufferPool) Buffer {
 	if len(s) == 1 {
 		s[0].Ref()
@@ -124,7 +125,8 @@ func (s BufferSlice) Reader() Reader {
 // Remaining(), which returns the number of unread bytes remaining in the slice.
 // Buffers will be freed as they are read.
 type Reader interface {
-	flate.Reader
+	io.Reader
+	io.ByteReader
 	// Close frees the underlying BufferSlice and never returns an error. Subsequent
 	// calls to Read will return (0, io.EOF).
 	Close() error
diff --git a/vendor/google.golang.org/grpc/server.go b/vendor/google.golang.org/grpc/server.go
index 457d27338f7..d1e1415a40f 100644
--- a/vendor/google.golang.org/grpc/server.go
+++ b/vendor/google.golang.org/grpc/server.go
@@ -1359,6 +1359,7 @@ func (s *Server) processUnaryRPC(ctx context.Context, t transport.ServerTranspor
 		}
 		return err
 	}
+	defer d.Free()
 	if channelz.IsOn() {
 		t.IncrMsgRecv()
 	}
diff --git a/vendor/google.golang.org/grpc/version.go b/vendor/google.golang.org/grpc/version.go
index 1ffec6e2cee..7c70005d083 100644
--- a/vendor/google.golang.org/grpc/version.go
+++ b/vendor/google.golang.org/grpc/version.go
@@ -19,4 +19,4 @@
 package grpc
 
 // Version is the current grpc version.
-const Version = "1.66.0"
+const Version = "1.66.2"
diff --git a/vendor/modules.txt b/vendor/modules.txt
index 7ec868987ed..219f3f9317d 100644
--- a/vendor/modules.txt
+++ b/vendor/modules.txt
@@ -530,7 +530,7 @@ github.com/imdario/mergo
 # github.com/inconshreveable/mousetrap v1.1.0
 ## explicit; go 1.18
 github.com/inconshreveable/mousetrap
-# github.com/isovalent/metricstool v0.1.0
+# github.com/isovalent/metricstool v0.1.1
 ## explicit; go 1.22.0
 github.com/isovalent/metricstool/pkg/metricsmd
 # github.com/josharian/intern v1.0.0
@@ -652,7 +652,7 @@ github.com/pmezard/go-difflib/difflib
 # github.com/power-devops/perfstat v0.0.0-20210106213030-5aafc221ea8c
 ## explicit; go 1.14
 github.com/power-devops/perfstat
-# github.com/prometheus/client_golang v1.20.2
+# github.com/prometheus/client_golang v1.20.3
 ## explicit; go 1.20
 github.com/prometheus/client_golang/internal/github.com/golang/gddo/httputil
 github.com/prometheus/client_golang/internal/github.com/golang/gddo/httputil/header
@@ -971,7 +971,7 @@ google.golang.org/genproto/googleapis/api/expr/v1alpha1
 # google.golang.org/genproto/googleapis/rpc v0.0.0-20240701130421-f6361c86f094
 ## explicit; go 1.20
 google.golang.org/genproto/googleapis/rpc/status
-# google.golang.org/grpc v1.66.0
+# google.golang.org/grpc v1.66.2
 ## explicit; go 1.21
 google.golang.org/grpc
 google.golang.org/grpc/attributes