Update dependencies to v0.26.5 tag

discovery/aggregated_discovery.go

@@ -111,8 +111,6 @@ func convertAPIGroup(g apidiscovery.APIGroupDiscovery) (
 	return group, gvResources, failedGVs
 }
 
-var emptyKind = metav1.GroupVersionKind{}
-
 // convertAPIResource tranforms a APIResourceDiscovery to an APIResource. We are
 // resilient to missing GVK, since this resource might be the parent resource
 // for a subresource. If the parent is missing a GVK, it is not returned in
@@ -127,7 +125,7 @@ func convertAPIResource(in apidiscovery.APIResourceDiscovery) (metav1.APIResourc
 		Categories:   in.Categories,
 	}
 	var err error
-	if in.ResponseKind != nil && (*in.ResponseKind) != emptyKind {
+	if in.ResponseKind != nil {
 		result.Group = in.ResponseKind.Group
 		result.Version = in.ResponseKind.Version
 		result.Kind = in.ResponseKind.Kind
@@ -142,7 +140,7 @@ func convertAPIResource(in apidiscovery.APIResourceDiscovery) (metav1.APIResourc
 // convertAPISubresource tranforms a APISubresourceDiscovery to an APIResource.
 func convertAPISubresource(parent metav1.APIResource, in apidiscovery.APISubresourceDiscovery) (metav1.APIResource, error) {
 	result := metav1.APIResource{}
-	if in.ResponseKind == nil || (*in.ResponseKind) == emptyKind {
+	if in.ResponseKind == nil {
 		return result, fmt.Errorf("subresource %s/%s missing GVK", parent.Name, in.Subresource)
 	}
 	result.Name = fmt.Sprintf("%s/%s", parent.Name, in.Subresource)

discovery/aggregated_discovery_test.go

@@ -610,76 +610,6 @@ func TestSplitGroupsAndResources(t *testing.T) {
 			},
 			expectedFailedGVs: map[schema.GroupVersion]error{},
 		},
-		{
-			name: "Aggregated discovery with single subresource and parent empty GVK",
-			agg: apidiscovery.APIGroupDiscoveryList{
-				Items: []apidiscovery.APIGroupDiscovery{
-					{
-						ObjectMeta: metav1.ObjectMeta{
-							Name: "external.metrics.k8s.io",
-						},
-						Versions: []apidiscovery.APIVersionDiscovery{
-							{
-								Version: "v1beta1",
-								Resources: []apidiscovery.APIResourceDiscovery{
-									{
-										// resilient to empty GVK for parent
-										Resource:         "*",
-										Scope:            apidiscovery.ScopeNamespace,
-										SingularResource: "",
-										ResponseKind:     &metav1.GroupVersionKind{},
-										Subresources: []apidiscovery.APISubresourceDiscovery{
-											{
-												Subresource: "other-external-metric",
-												ResponseKind: &metav1.GroupVersionKind{
-													Kind: "MetricValueList",
-												},
-												Verbs: []string{"get"},
-											},
-										},
-									},
-								},
-							},
-						},
-					},
-				},
-			},
-			expectedGroups: metav1.APIGroupList{
-				Groups: []metav1.APIGroup{
-					{
-						Name: "external.metrics.k8s.io",
-						Versions: []metav1.GroupVersionForDiscovery{
-							{
-								GroupVersion: "external.metrics.k8s.io/v1beta1",
-								Version:      "v1beta1",
-							},
-						},
-						PreferredVersion: metav1.GroupVersionForDiscovery{
-							GroupVersion: "external.metrics.k8s.io/v1beta1",
-							Version:      "v1beta1",
-						},
-					},
-				},
-			},
-			expectedGVResources: map[schema.GroupVersion]*metav1.APIResourceList{
-				{Group: "external.metrics.k8s.io", Version: "v1beta1"}: {
-					GroupVersion: "external.metrics.k8s.io/v1beta1",
-					APIResources: []metav1.APIResource{
-						// Since parent GVK was nil, it is NOT returned--only the subresource.
-						{
-							Name:         "*/other-external-metric",
-							SingularName: "",
-							Namespaced:   true,
-							Group:        "",
-							Version:      "",
-							Kind:         "MetricValueList",
-							Verbs:        []string{"get"},
-						},
-					},
-				},
-			},
-			expectedFailedGVs: map[schema.GroupVersion]error{},
-		},
 		{
 			name: "Aggregated discovery with multiple subresources",
 			agg: apidiscovery.APIGroupDiscoveryList{

go.mod

@@ -9,23 +9,23 @@ require (
 	github.com/evanphx/json-patch v4.12.0+incompatible
 	github.com/gogo/protobuf v1.3.2
 	github.com/golang/groupcache v0.0.0-20210331224755-41bb18bfe9da
-	github.com/golang/protobuf v1.5.3
+	github.com/golang/protobuf v1.5.2
 	github.com/google/gnostic v0.5.7-v3refs
 	github.com/google/go-cmp v0.5.9
 	github.com/google/gofuzz v1.1.0
-	github.com/google/uuid v1.3.0
+	github.com/google/uuid v1.1.2
 	github.com/gregjones/httpcache v0.0.0-20180305231024-9cad4c3443a7
 	github.com/imdario/mergo v0.3.6
 	github.com/peterbourgon/diskv v2.0.1+incompatible
 	github.com/spf13/pflag v1.0.5
-	github.com/stretchr/testify v1.8.1
-	golang.org/x/net v0.17.0
-	golang.org/x/oauth2 v0.7.0
-	golang.org/x/term v0.13.0
-	golang.org/x/time v0.3.0
-	google.golang.org/protobuf v1.31.0
-	k8s.io/api v0.26.11
-	k8s.io/apimachinery v0.26.11
+	github.com/stretchr/testify v1.8.0
+	golang.org/x/net v0.8.0
+	golang.org/x/oauth2 v0.0.0-20220223155221-ee480838109b
+	golang.org/x/term v0.6.0
+	golang.org/x/time v0.0.0-20220210224613-90d013bbcef8
+	google.golang.org/protobuf v1.28.1
+	k8s.io/api v0.26.5
+	k8s.io/apimachinery v0.26.5
 	k8s.io/klog/v2 v2.80.1
 	k8s.io/kube-openapi v0.0.0-20221012153701-172d655c2280
 	k8s.io/utils v0.0.0-20221107191617-1a15be271d1d
@@ -49,8 +49,8 @@ require (
 	github.com/munnerz/goautoneg v0.0.0-20191010083416-a7dc8b61c822 // indirect
 	github.com/pkg/errors v0.9.1 // indirect
 	github.com/pmezard/go-difflib v1.0.0 // indirect
-	golang.org/x/sys v0.13.0 // indirect
-	golang.org/x/text v0.13.0 // indirect
+	golang.org/x/sys v0.6.0 // indirect
+	golang.org/x/text v0.8.0 // indirect
 	google.golang.org/appengine v1.6.7 // indirect
 	gopkg.in/inf.v0 v0.9.1 // indirect
 	gopkg.in/yaml.v2 v2.4.0 // indirect
@@ -59,6 +59,6 @@ require (
 )
 
 replace (
-	k8s.io/api => k8s.io/api v0.26.11
-	k8s.io/apimachinery => k8s.io/apimachinery v0.26.11
+	k8s.io/api => k8s.io/api v0.26.5
+	k8s.io/apimachinery => k8s.io/apimachinery v0.26.5
 )

go.sum

@@ -1,8 +1,45 @@
 cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
+cloud.google.com/go v0.34.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
+cloud.google.com/go v0.38.0/go.mod h1:990N+gfupTy94rShfmMCWGDn0LpTmnzTp2qbd1dvSRU=
+cloud.google.com/go v0.44.1/go.mod h1:iSa0KzasP4Uvy3f1mN/7PiObzGgflwredwwASm/v6AU=
+cloud.google.com/go v0.44.2/go.mod h1:60680Gw3Yr4ikxnPRS/oxxkBccT6SA1yMk63TGekxKY=
+cloud.google.com/go v0.45.1/go.mod h1:RpBamKRgapWJb87xiFSdk4g1CME7QZg3uwTez+TSTjc=
+cloud.google.com/go v0.46.3/go.mod h1:a6bKKbmY7er1mI7TEI4lsAkts/mkhTSZK8w33B4RAg0=
+cloud.google.com/go v0.50.0/go.mod h1:r9sluTvynVuxRIOHXQEHMFffphuXHOMZMycpNR5e6To=
+cloud.google.com/go v0.52.0/go.mod h1:pXajvRH/6o3+F9jDHZWQ5PbGhn+o8w9qiu/CffaVdO4=
+cloud.google.com/go v0.53.0/go.mod h1:fp/UouUEsRkN6ryDKNW/Upv/JBKnv6WDthjR6+vze6M=
+cloud.google.com/go v0.54.0/go.mod h1:1rq2OEkV3YMf6n/9ZvGWI3GWw0VoqH/1x2nd8Is/bPc=
+cloud.google.com/go v0.56.0/go.mod h1:jr7tqZxxKOVYizybht9+26Z/gUq7tiRzu+ACVAMbKVk=
+cloud.google.com/go v0.57.0/go.mod h1:oXiQ6Rzq3RAkkY7N6t3TcE6jE+CIBBbA36lwQ1JyzZs=
+cloud.google.com/go v0.62.0/go.mod h1:jmCYTdRCQuc1PHIIJ/maLInMho30T/Y0M4hTdTShOYc=
+cloud.google.com/go v0.65.0/go.mod h1:O5N8zS7uWy9vkA9vayVHs65eM1ubvY4h553ofrNHObY=
+cloud.google.com/go/bigquery v1.0.1/go.mod h1:i/xbL2UlR5RvWAURpBYZTtm/cXjCha9lbfbpx4poX+o=
+cloud.google.com/go/bigquery v1.3.0/go.mod h1:PjpwJnslEMmckchkHFfq+HTD2DmtT67aNFKH1/VBDHE=
+cloud.google.com/go/bigquery v1.4.0/go.mod h1:S8dzgnTigyfTmLBfrtrhyYhwRxG72rYxvftPBK2Dvzc=
+cloud.google.com/go/bigquery v1.5.0/go.mod h1:snEHRnqQbz117VIFhE8bmtwIDY80NLUZUMb4Nv6dBIg=
+cloud.google.com/go/bigquery v1.7.0/go.mod h1://okPTzCYNXSlb24MZs83e2Do+h+VXtc4gLoIoXIAPc=
+cloud.google.com/go/bigquery v1.8.0/go.mod h1:J5hqkt3O0uAFnINi6JXValWIb1v0goeZM77hZzJN/fQ=
+cloud.google.com/go/datastore v1.0.0/go.mod h1:LXYbyblFSglQ5pkeyhO+Qmw7ukd3C+pD7TKLgZqpHYE=
+cloud.google.com/go/datastore v1.1.0/go.mod h1:umbIZjpQpHh4hmRpGhH4tLFup+FVzqBi1b3c64qFpCk=
+cloud.google.com/go/pubsub v1.0.1/go.mod h1:R0Gpsv3s54REJCy4fxDixWD93lHJMoZTyQ2kNxGRt3I=
+cloud.google.com/go/pubsub v1.1.0/go.mod h1:EwwdRX2sKPjnvnqCa270oGRyludottCI76h+R3AArQw=
+cloud.google.com/go/pubsub v1.2.0/go.mod h1:jhfEVHT8odbXTkndysNHCcx0awwzvfOlguIAii9o8iA=
+cloud.google.com/go/pubsub v1.3.1/go.mod h1:i+ucay31+CNRpDW4Lu78I4xXG+O1r/MAHgjpRVR+TSU=
+cloud.google.com/go/storage v1.0.0/go.mod h1:IhtSnM/ZTZV8YYJWCY8RULGVqBDmpoyjwiyrjsg+URw=
+cloud.google.com/go/storage v1.5.0/go.mod h1:tpKbwo567HUNpVclU5sGELwQWBDZ8gh0ZeosJ0Rtdos=
+cloud.google.com/go/storage v1.6.0/go.mod h1:N7U0C8pVQ/+NIKOBQyamJIeKQKkZ+mxpohlUTyfDhBk=
+cloud.google.com/go/storage v1.8.0/go.mod h1:Wv1Oy7z6Yz3DshWRJFhqM/UCfaWIRTdp0RXyy7KQOVs=
+cloud.google.com/go/storage v1.10.0/go.mod h1:FLPqc6j+Ki4BU591ie1oL6qBQGu2Bl/tZ9ullr3+Kg0=
+dmitri.shuralyov.com/gpu/mtl v0.0.0-20190408044501-666a987793e9/go.mod h1:H6x//7gZCb22OMCxBHrMx7a5I7Hp++hsVxbQ4BYO7hU=
 github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
+github.com/BurntSushi/xgb v0.0.0-20160522181843-27f122750802/go.mod h1:IVnqGOEym/WlBOVXweHU+Q+/VP0lqqI8lqeDx9IjBqo=
 github.com/armon/go-socks5 v0.0.0-20160902184237-e75332964ef5 h1:0CwZNZbxp69SHPdPJAN/hZIm0C4OItdklCFmMRWYpio=
 github.com/census-instrumentation/opencensus-proto v0.2.1/go.mod h1:f6KPmirojxKA12rnyqOA5BBL4O983OfeGPqjHWSTneU=
+github.com/chzyer/logex v1.1.10/go.mod h1:+Ywpsq7O8HXn0nuIou7OrIPyXbp3wmkHB+jjWRnGsAI=
+github.com/chzyer/readline v0.0.0-20180603132655-2972be24d48e/go.mod h1:nSuG5e5PlCu98SY8svDHJxuZscDgtXS6KTTbou5AhLI=
+github.com/chzyer/test v0.0.0-20180213035817-a1ea475d72b1/go.mod h1:Q3SI9o4m/ZMnBNeIyt5eFwwo7qiLfzFZmjNmxjkiQlU=
 github.com/client9/misspell v0.3.4/go.mod h1:qj6jICC3Q7zFZvVWo7KLAzC3yx5G7kyvSDkc90ppPyw=
+github.com/cncf/udpa/go v0.0.0-20191209042840-269d4d468f6f/go.mod h1:M8M6+tZqaGXZJjfX53e64911xZQV5JYwmTeXPW+k8Sc=
 github.com/creack/pty v1.1.9/go.mod h1:oKZEueFk5CKHvIhNR5MUki03XCEU+Q6VDXinZuGJ33E=
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
@@ -11,10 +48,15 @@ github.com/docopt/docopt-go v0.0.0-20180111231733-ee0de3bc6815/go.mod h1:WwZ+bS3
 github.com/elazarl/goproxy v0.0.0-20180725130230-947c36da3153 h1:yUdfgN0XgIJw7foRItutHYUIhlcKzcSf5vDpdhQAKTc=
 github.com/emicklei/go-restful/v3 v3.9.0 h1:XwGDlfxEnQZzuopoqxwSEllNcCOM9DhhFyhFIIGKwxE=
 github.com/emicklei/go-restful/v3 v3.9.0/go.mod h1:6n3XBCmQQb25CM2LCACGz8ukIrRry+4bhvbpWn3mrbc=
+github.com/envoyproxy/go-control-plane v0.9.0/go.mod h1:YTl/9mNaCwkRvm6d1a2C3ymFceY/DCBVvsKhRF0iEA4=
 github.com/envoyproxy/go-control-plane v0.9.1-0.20191026205805-5f8ba28d4473/go.mod h1:YTl/9mNaCwkRvm6d1a2C3ymFceY/DCBVvsKhRF0iEA4=
+github.com/envoyproxy/go-control-plane v0.9.4/go.mod h1:6rpuAdCZL397s3pYoYcLgu1mIlRU8Am5FuJP05cCM98=
 github.com/envoyproxy/protoc-gen-validate v0.1.0/go.mod h1:iSmxcyjqTsJpI2R4NaDN7+kN2VEUnK/pcBlmesArF7c=
 github.com/evanphx/json-patch v4.12.0+incompatible h1:4onqiflcdA9EOZ4RxV643DvftH5pOlLGNtQ5lPWQu84=
 github.com/evanphx/json-patch v4.12.0+incompatible/go.mod h1:50XU6AFN0ol/bzJsmQLiYLvXMP4fmwYFNcr97nuDLSk=
+github.com/go-gl/glfw v0.0.0-20190409004039-e6da0acd62b1/go.mod h1:vR7hzQXu2zJy9AVAgeJqvqgH9Q5CA+iKCZ2gyEVpxRU=
+github.com/go-gl/glfw/v3.3/glfw v0.0.0-20191125211704-12ad95a8df72/go.mod h1:tQ2UAYgL5IevRw8kRxooKSPJfGvJ9fJQFa0TUsXzTg8=
+github.com/go-gl/glfw/v3.3/glfw v0.0.0-20200222043503-6f7a984d4dc4/go.mod h1:tQ2UAYgL5IevRw8kRxooKSPJfGvJ9fJQFa0TUsXzTg8=
 github.com/go-logr/logr v1.2.0/go.mod h1:jdQByPbusPIv2/zmleS9BjJVeZ6kBagPoEUsqbVz/1A=
 github.com/go-logr/logr v1.2.3 h1:2DntVwHkVopvECVRSlL5PSo9eG+cAkDCuckLubN+rq0=
 github.com/go-logr/logr v1.2.3/go.mod h1:jdQByPbusPIv2/zmleS9BjJVeZ6kBagPoEUsqbVz/1A=
@@ -29,22 +71,36 @@ github.com/go-openapi/swag v0.19.14/go.mod h1:QYRuS/SOXUCsnplDa677K7+DxSOj6IPNl/
 github.com/gogo/protobuf v1.3.2 h1:Ov1cvc58UF3b5XjBnZv7+opcTcQFZebYjWzi34vdm4Q=
 github.com/gogo/protobuf v1.3.2/go.mod h1:P1XiOD3dCwIKUDQYPy72D8LYyHL2YPYrpS2s69NZV8Q=
 github.com/golang/glog v0.0.0-20160126235308-23def4e6c14b/go.mod h1:SBH7ygxi8pfUlaOkMMuAQtPIUF8ecWP5IEl/CR7VP2Q=
+github.com/golang/groupcache v0.0.0-20190702054246-869f871628b6/go.mod h1:cIg4eruTrX1D+g88fzRXU5OdNfaM+9IcxsU14FzY7Hc=
+github.com/golang/groupcache v0.0.0-20191227052852-215e87163ea7/go.mod h1:cIg4eruTrX1D+g88fzRXU5OdNfaM+9IcxsU14FzY7Hc=
+github.com/golang/groupcache v0.0.0-20200121045136-8c9f03a8e57e/go.mod h1:cIg4eruTrX1D+g88fzRXU5OdNfaM+9IcxsU14FzY7Hc=
 github.com/golang/groupcache v0.0.0-20210331224755-41bb18bfe9da h1:oI5xCqsCo564l8iNU+DwB5epxmsaqB+rhGL0m5jtYqE=
 github.com/golang/groupcache v0.0.0-20210331224755-41bb18bfe9da/go.mod h1:cIg4eruTrX1D+g88fzRXU5OdNfaM+9IcxsU14FzY7Hc=
 github.com/golang/mock v1.1.1/go.mod h1:oTYuIxOrZwtPieC+H1uAHpcLFnEyAGVDL/k47Jfbm0A=
+github.com/golang/mock v1.2.0/go.mod h1:oTYuIxOrZwtPieC+H1uAHpcLFnEyAGVDL/k47Jfbm0A=
+github.com/golang/mock v1.3.1/go.mod h1:sBzyDLLjw3U8JLTeZvSv8jJB+tU5PVekmnlKIyFUx0Y=
+github.com/golang/mock v1.4.0/go.mod h1:UOMv5ysSaYNkG+OFQykRIcU/QvvxJf3p21QfJ2Bt3cw=
+github.com/golang/mock v1.4.1/go.mod h1:UOMv5ysSaYNkG+OFQykRIcU/QvvxJf3p21QfJ2Bt3cw=
+github.com/golang/mock v1.4.3/go.mod h1:UOMv5ysSaYNkG+OFQykRIcU/QvvxJf3p21QfJ2Bt3cw=
+github.com/golang/mock v1.4.4/go.mod h1:l3mdAwkq5BuhzHwde/uurv3sEJeZMXNpwsxVWU71h+4=
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+github.com/golang/protobuf v1.3.3/go.mod h1:vzj43D7+SQXF/4pzW/hwtAqwc6iTitCiVSaWz5lYuqw=
+github.com/golang/protobuf v1.3.4/go.mod h1:vzj43D7+SQXF/4pzW/hwtAqwc6iTitCiVSaWz5lYuqw=
+github.com/golang/protobuf v1.3.5/go.mod h1:6O5/vntMXwX2lRkT1hjjk0nAC1IDOTvTlVgjlRvqsdk=
 github.com/golang/protobuf v1.4.0-rc.1/go.mod h1:ceaxUfeHdC40wWswd/P6IGgMaK3YpKi5j83Wpe3EHw8=
 github.com/golang/protobuf v1.4.0-rc.1.0.20200221234624-67d41d38c208/go.mod h1:xKAWHe0F5eneWXFV3EuXVDTCmh+JuBKY0li0aMyXATA=
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+github.com/golang/protobuf v1.4.2/go.mod h1:oDoupMAO8OvCJWAcko0GGGIgR6R6ocIYbsSw735rRwI=
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-k8s.io/apimachinery v0.26.11/go.mod h1:2/HZp0l6coXtS26du1Bk36fCuAEr/lVs9Q9NbpBtd1Y=
+honnef.co/go/tools v0.0.1-2019.2.3/go.mod h1:a3bituU0lyd329TUQxRnasdCoJDkEUEAqEt0JzvZhAg=
+honnef.co/go/tools v0.0.1-2020.1.3/go.mod h1:X/FiERA/W4tHapMX5mGpAtMSVEeEUOyHaw9vFzvIQ3k=
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+k8s.io/api v0.26.5 h1:Npao/+sMSng6nkEcNydgH3BNo4s5YoBg7iw35HM7Hcw=
+k8s.io/api v0.26.5/go.mod h1:O7ICW7lj6+ZQQQ3cxekgCoW+fnGo5kWT0nTHkLZ5grc=
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 k8s.io/klog/v2 v2.80.1 h1:atnLQ121W371wYYFawwYx1aEY2eUfs4l3J72wtgAwV4=
 k8s.io/klog/v2 v2.80.1/go.mod h1:y1WjHnz7Dj687irZUWR/WLkLc5N1YHtjLdmgWjndZn0=
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+rsc.io/binaryregexp v0.2.0/go.mod h1:qTv7/COck+e2FymRvadv62gMdZztPaShugOCi3I+8D8=
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 sigs.k8s.io/json v0.0.0-20220713155537-f223a00ba0e2/go.mod h1:B8JuhiUyNFVKdsE8h686QcCxMaH6HrOAZj4vswFpcB0=
 sigs.k8s.io/structured-merge-diff/v4 v4.2.3 h1:PRbqxJClWWYMNV1dhaG4NsibJbArud9kFxnAMREiWFE=

tools/events/event_broadcaster.go

@@ -181,24 +181,22 @@ func (e *eventBroadcasterImpl) recordToSink(event *eventsv1.Event, clock clock.C
 					return nil
 				}
 				isomorphicEvent.Series = &eventsv1.EventSeries{
-					Count:            2,
+					Count:            1,
 					LastObservedTime: metav1.MicroTime{Time: clock.Now()},
 				}
-				// Make a copy of the Event to make sure that recording it
-				// doesn't mess with the object stored in cache.
-				return isomorphicEvent.DeepCopy()
+				return isomorphicEvent
 			}
 			e.eventCache[eventKey] = eventCopy
-			// Make a copy of the Event to make sure that recording it doesn't
-			// mess with the object stored in cache.
-			return eventCopy.DeepCopy()
+			return eventCopy
 		}()
 		if evToRecord != nil {
-			// TODO: Add a metric counting the number of recording attempts
-			e.attemptRecording(evToRecord)
-			// We don't want the new recorded Event to be reflected in the
-			// client's cache because server-side mutations could mess with the
-			// aggregation mechanism used by the client.
+			recordedEvent := e.attemptRecording(evToRecord)
+			if recordedEvent != nil {
+				recordedEventKey := getKey(recordedEvent)
+				e.mu.Lock()
+				defer e.mu.Unlock()
+				e.eventCache[recordedEventKey] = recordedEvent
+			}
 		}
 	}()
 }
@@ -250,14 +248,6 @@ func recordEvent(sink EventSink, event *eventsv1.Event) (*eventsv1.Event, bool)
 		return nil, false
 	case *errors.StatusError:
 		if errors.IsAlreadyExists(err) {
-			// If we tried to create an Event from an EventSerie, it means that
-			// the original Patch request failed because the Event we were
-			// trying to patch didn't exist. If the creation failed because the
-			// Event now exists, it is safe to retry.  This occurs when a new
-			// Event is emitted twice in a very short period of time.
-			if isEventSeries {
-				return nil, true
-			}
 			klog.V(5).Infof("Server rejected event '%#v': '%v' (will not retry!)", event, err)
 		} else {
 			klog.Errorf("Server rejected event '%#v': '%v' (will not retry!)", event, err)

tools/events/event_broadcaster_test.go

@@ -1,103 +0,0 @@
-/*
-Copyright 2022 The Kubernetes 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 events
-
-import (
-	"context"
-	"reflect"
-	"testing"
-
-	eventsv1 "k8s.io/api/events/v1"
-	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
-	"k8s.io/apimachinery/pkg/util/diff"
-	"k8s.io/client-go/kubernetes/fake"
-)
-
-func TestRecordEventToSink(t *testing.T) {
-	nonIsomorphicEvent := eventsv1.Event{
-		ObjectMeta: metav1.ObjectMeta{
-			Name:      "test",
-			Namespace: metav1.NamespaceDefault,
-		},
-		Series: nil,
-	}
-
-	isomorphicEvent := *nonIsomorphicEvent.DeepCopy()
-	isomorphicEvent.Series = &eventsv1.EventSeries{Count: 2}
-
-	testCases := []struct {
-		name                  string
-		eventsToRecord        []eventsv1.Event
-		expectedRecordedEvent eventsv1.Event
-	}{
-		{
-			name: "record one Event",
-			eventsToRecord: []eventsv1.Event{
-				nonIsomorphicEvent,
-			},
-			expectedRecordedEvent: nonIsomorphicEvent,
-		},
-		{
-			name: "record one Event followed by an isomorphic one",
-			eventsToRecord: []eventsv1.Event{
-				nonIsomorphicEvent,
-				isomorphicEvent,
-			},
-			expectedRecordedEvent: isomorphicEvent,
-		},
-		{
-			name: "record one isomorphic Event before the original",
-			eventsToRecord: []eventsv1.Event{
-				isomorphicEvent,
-				nonIsomorphicEvent,
-			},
-			expectedRecordedEvent: isomorphicEvent,
-		},
-		{
-			name: "record one isomorphic Event without one already existing",
-			eventsToRecord: []eventsv1.Event{
-				isomorphicEvent,
-			},
-			expectedRecordedEvent: isomorphicEvent,
-		},
-	}
-
-	for _, tc := range testCases {
-		t.Run(tc.name, func(t *testing.T) {
-			kubeClient := fake.NewSimpleClientset()
-			eventSink := &EventSinkImpl{Interface: kubeClient.EventsV1()}
-
-			for _, ev := range tc.eventsToRecord {
-				recordEvent(eventSink, &ev)
-			}
-
-			recordedEvents, err := kubeClient.EventsV1().Events(metav1.NamespaceDefault).List(context.TODO(), metav1.ListOptions{})
-			if err != nil {
-				t.Errorf("expected to be able to list Events from fake client")
-			}
-
-			if len(recordedEvents.Items) != 1 {
-				t.Errorf("expected one Event to be recorded, found: %d", len(recordedEvents.Items))
-			}
-
-			recordedEvent := recordedEvents.Items[0]
-			if !reflect.DeepEqual(recordedEvent, tc.expectedRecordedEvent) {
-				t.Errorf("expected to have recorded Event: %#+v, got: %#+v\n diff: %s", tc.expectedRecordedEvent, recordedEvent, diff.ObjectReflectDiff(tc.expectedRecordedEvent, recordedEvent))
-			}
-		})
-	}
-}

tools/events/eventseries_test.go

@@ -17,7 +17,6 @@ limitations under the License.
 package events
 
 import (
-	"context"
 	"strconv"
 	"testing"
 	"time"
@@ -30,7 +29,6 @@ import (
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
 	k8sruntime "k8s.io/apimachinery/pkg/runtime"
 	"k8s.io/apimachinery/pkg/util/wait"
-	fake "k8s.io/client-go/kubernetes/fake"
 	"k8s.io/client-go/kubernetes/scheme"
 	restclient "k8s.io/client-go/rest"
 	ref "k8s.io/client-go/tools/reference"
@@ -108,7 +106,7 @@ func TestEventSeriesf(t *testing.T) {
 	nonIsomorphicEvent := expectedEvent.DeepCopy()
 	nonIsomorphicEvent.Action = "stopped"
 
-	expectedEvent.Series = &eventsv1.EventSeries{Count: 2}
+	expectedEvent.Series = &eventsv1.EventSeries{Count: 1}
 	table := []struct {
 		regarding    k8sruntime.Object
 		related      k8sruntime.Object
@@ -187,44 +185,6 @@ func TestEventSeriesf(t *testing.T) {
 	close(stopCh)
 }
 
-// TestEventSeriesWithEventSinkImplRace verifies that when Events are emitted to
-// an EventSink consecutively there is no data race.  This test is meant to be
-// run with the `-race` option.
-func TestEventSeriesWithEventSinkImplRace(t *testing.T) {
-	kubeClient := fake.NewSimpleClientset()
-
-	eventSink := &EventSinkImpl{Interface: kubeClient.EventsV1()}
-	eventBroadcaster := NewBroadcaster(eventSink)
-
-	stopCh := make(chan struct{})
-	eventBroadcaster.StartRecordingToSink(stopCh)
-
-	recorder := eventBroadcaster.NewRecorder(scheme.Scheme, "test")
-
-	recorder.Eventf(&v1.ObjectReference{}, nil, v1.EventTypeNormal, "reason", "action", "", "")
-	recorder.Eventf(&v1.ObjectReference{}, nil, v1.EventTypeNormal, "reason", "action", "", "")
-
-	err := wait.PollImmediate(100*time.Millisecond, 5*time.Second, func() (done bool, err error) {
-		events, err := kubeClient.EventsV1().Events(metav1.NamespaceDefault).List(context.TODO(), metav1.ListOptions{})
-		if err != nil {
-			return false, err
-		}
-
-		if len(events.Items) != 1 {
-			return false, nil
-		}
-
-		if events.Items[0].Series == nil {
-			return false, nil
-		}
-
-		return true, nil
-	})
-	if err != nil {
-		t.Fatal("expected that 2 identical Eventf calls would result in the creation of an Event with a Serie")
-	}
-}
-
 func validateEvent(messagePrefix string, expectedUpdate bool, actualEvent *eventsv1.Event, expectedEvent *eventsv1.Event, t *testing.T) {
 	recvEvent := *actualEvent
 

tools/record/event.go

@@ -344,9 +344,6 @@ func (recorder *recorderImpl) generateEvent(object runtime.Object, annotations m
 	event := recorder.makeEvent(ref, annotations, eventtype, reason, message)
 	event.Source = recorder.source
 
-	event.ReportingInstance = recorder.source.Host
-	event.ReportingController = recorder.source.Component
-
 	// NOTE: events should be a non-blocking operation, but we also need to not
 	// put this in a goroutine, otherwise we'll race to write to a closed channel
 	// when we go to shut down this broadcaster.  Just drop events if we get overloaded,

tools/record/event_test.go

@@ -178,12 +178,11 @@ func TestEventf(t *testing.T) {
 					APIVersion: "v1",
 					FieldPath:  "spec.containers[2]",
 				},
-				Reason:              "Started",
-				Message:             "some verbose message: 1",
-				Source:              v1.EventSource{Component: "eventTest"},
-				ReportingController: "eventTest",
-				Count:               1,
-				Type:                v1.EventTypeNormal,
+				Reason:  "Started",
+				Message: "some verbose message: 1",
+				Source:  v1.EventSource{Component: "eventTest"},
+				Count:   1,
+				Type:    v1.EventTypeNormal,
 			},
 			expectLog:    `Event(v1.ObjectReference{Kind:"Pod", Namespace:"baz", Name:"foo", UID:"bar", APIVersion:"v1", ResourceVersion:"", FieldPath:"spec.containers[2]"}): type: 'Normal' reason: 'Started' some verbose message: 1`,
 			expectUpdate: false,
@@ -206,12 +205,11 @@ func TestEventf(t *testing.T) {
 					UID:        "bar",
 					APIVersion: "v1",
 				},
-				Reason:              "Killed",
-				Message:             "some other verbose message: 1",
-				Source:              v1.EventSource{Component: "eventTest"},
-				ReportingController: "eventTest",
-				Count:               1,
-				Type:                v1.EventTypeNormal,
+				Reason:  "Killed",
+				Message: "some other verbose message: 1",
+				Source:  v1.EventSource{Component: "eventTest"},
+				Count:   1,
+				Type:    v1.EventTypeNormal,
 			},
 			expectLog:    `Event(v1.ObjectReference{Kind:"Pod", Namespace:"baz", Name:"foo", UID:"bar", APIVersion:"v1", ResourceVersion:"", FieldPath:""}): type: 'Normal' reason: 'Killed' some other verbose message: 1`,
 			expectUpdate: false,
@@ -235,12 +233,11 @@ func TestEventf(t *testing.T) {
 					APIVersion: "v1",
 					FieldPath:  "spec.containers[2]",
 				},
-				Reason:              "Started",
-				Message:             "some verbose message: 1",
-				Source:              v1.EventSource{Component: "eventTest"},
-				ReportingController: "eventTest",
-				Count:               2,
-				Type:                v1.EventTypeNormal,
+				Reason:  "Started",
+				Message: "some verbose message: 1",
+				Source:  v1.EventSource{Component: "eventTest"},
+				Count:   2,
+				Type:    v1.EventTypeNormal,
 			},
 			expectLog:    `Event(v1.ObjectReference{Kind:"Pod", Namespace:"baz", Name:"foo", UID:"bar", APIVersion:"v1", ResourceVersion:"", FieldPath:"spec.containers[2]"}): type: 'Normal' reason: 'Started' some verbose message: 1`,
 			expectUpdate: true,
@@ -264,12 +261,11 @@ func TestEventf(t *testing.T) {
 					APIVersion: "v1",
 					FieldPath:  "spec.containers[3]",
 				},
-				Reason:              "Started",
-				Message:             "some verbose message: 1",
-				Source:              v1.EventSource{Component: "eventTest"},
-				ReportingController: "eventTest",
-				Count:               1,
-				Type:                v1.EventTypeNormal,
+				Reason:  "Started",
+				Message: "some verbose message: 1",
+				Source:  v1.EventSource{Component: "eventTest"},
+				Count:   1,
+				Type:    v1.EventTypeNormal,
 			},
 			expectLog:    `Event(v1.ObjectReference{Kind:"Pod", Namespace:"baz", Name:"foo", UID:"differentUid", APIVersion:"v1", ResourceVersion:"", FieldPath:"spec.containers[3]"}): type: 'Normal' reason: 'Started' some verbose message: 1`,
 			expectUpdate: false,
@@ -293,12 +289,11 @@ func TestEventf(t *testing.T) {
 					APIVersion: "v1",
 					FieldPath:  "spec.containers[2]",
 				},
-				Reason:              "Started",
-				Message:             "some verbose message: 1",
-				Source:              v1.EventSource{Component: "eventTest"},
-				ReportingController: "eventTest",
-				Count:               3,
-				Type:                v1.EventTypeNormal,
+				Reason:  "Started",
+				Message: "some verbose message: 1",
+				Source:  v1.EventSource{Component: "eventTest"},
+				Count:   3,
+				Type:    v1.EventTypeNormal,
 			},
 			expectLog:    `Event(v1.ObjectReference{Kind:"Pod", Namespace:"baz", Name:"foo", UID:"bar", APIVersion:"v1", ResourceVersion:"", FieldPath:"spec.containers[2]"}): type: 'Normal' reason: 'Started' some verbose message: 1`,
 			expectUpdate: true,
@@ -322,12 +317,11 @@ func TestEventf(t *testing.T) {
 					APIVersion: "v1",
 					FieldPath:  "spec.containers[3]",
 				},
-				Reason:              "Stopped",
-				Message:             "some verbose message: 1",
-				Source:              v1.EventSource{Component: "eventTest"},
-				ReportingController: "eventTest",
-				Count:               1,
-				Type:                v1.EventTypeNormal,
+				Reason:  "Stopped",
+				Message: "some verbose message: 1",
+				Source:  v1.EventSource{Component: "eventTest"},
+				Count:   1,
+				Type:    v1.EventTypeNormal,
 			},
 			expectLog:    `Event(v1.ObjectReference{Kind:"Pod", Namespace:"baz", Name:"foo", UID:"differentUid", APIVersion:"v1", ResourceVersion:"", FieldPath:"spec.containers[3]"}): type: 'Normal' reason: 'Stopped' some verbose message: 1`,
 			expectUpdate: false,
@@ -351,12 +345,11 @@ func TestEventf(t *testing.T) {
 					APIVersion: "v1",
 					FieldPath:  "spec.containers[3]",
 				},
-				Reason:              "Stopped",
-				Message:             "some verbose message: 1",
-				Source:              v1.EventSource{Component: "eventTest"},
-				ReportingController: "eventTest",
-				Count:               2,
-				Type:                v1.EventTypeNormal,
+				Reason:  "Stopped",
+				Message: "some verbose message: 1",
+				Source:  v1.EventSource{Component: "eventTest"},
+				Count:   2,
+				Type:    v1.EventTypeNormal,
 			},
 			expectLog:    `Event(v1.ObjectReference{Kind:"Pod", Namespace:"baz", Name:"foo", UID:"differentUid", APIVersion:"v1", ResourceVersion:"", FieldPath:"spec.containers[3]"}): type: 'Normal' reason: 'Stopped' some verbose message: 1`,
 			expectUpdate: true,
@@ -704,12 +697,11 @@ func TestMultiSinkCache(t *testing.T) {
 					APIVersion: "v1",
 					FieldPath:  "spec.containers[2]",
 				},
-				Reason:              "Started",
-				Message:             "some verbose message: 1",
-				Source:              v1.EventSource{Component: "eventTest"},
-				ReportingController: "eventTest",
-				Count:               1,
-				Type:                v1.EventTypeNormal,
+				Reason:  "Started",
+				Message: "some verbose message: 1",
+				Source:  v1.EventSource{Component: "eventTest"},
+				Count:   1,
+				Type:    v1.EventTypeNormal,
 			},
 			expectLog:    `Event(v1.ObjectReference{Kind:"Pod", Namespace:"baz", Name:"foo", UID:"bar", APIVersion:"v1", ResourceVersion:"", FieldPath:"spec.containers[2]"}): type: 'Normal' reason: 'Started' some verbose message: 1`,
 			expectUpdate: false,
@@ -732,12 +724,11 @@ func TestMultiSinkCache(t *testing.T) {
 					UID:        "bar",
 					APIVersion: "v1",
 				},
-				Reason:              "Killed",
-				Message:             "some other verbose message: 1",
-				Source:              v1.EventSource{Component: "eventTest"},
-				ReportingController: "eventTest",
-				Count:               1,
-				Type:                v1.EventTypeNormal,
+				Reason:  "Killed",
+				Message: "some other verbose message: 1",
+				Source:  v1.EventSource{Component: "eventTest"},
+				Count:   1,
+				Type:    v1.EventTypeNormal,
 			},
 			expectLog:    `Event(v1.ObjectReference{Kind:"Pod", Namespace:"baz", Name:"foo", UID:"bar", APIVersion:"v1", ResourceVersion:"", FieldPath:""}): type: 'Normal' reason: 'Killed' some other verbose message: 1`,
 			expectUpdate: false,
@@ -761,12 +752,11 @@ func TestMultiSinkCache(t *testing.T) {
 					APIVersion: "v1",
 					FieldPath:  "spec.containers[2]",
 				},
-				Reason:              "Started",
-				Message:             "some verbose message: 1",
-				Source:              v1.EventSource{Component: "eventTest"},
-				ReportingController: "eventTest",
-				Count:               2,
-				Type:                v1.EventTypeNormal,
+				Reason:  "Started",
+				Message: "some verbose message: 1",
+				Source:  v1.EventSource{Component: "eventTest"},
+				Count:   2,
+				Type:    v1.EventTypeNormal,
 			},
 			expectLog:    `Event(v1.ObjectReference{Kind:"Pod", Namespace:"baz", Name:"foo", UID:"bar", APIVersion:"v1", ResourceVersion:"", FieldPath:"spec.containers[2]"}): type: 'Normal' reason: 'Started' some verbose message: 1`,
 			expectUpdate: true,
@@ -790,12 +780,11 @@ func TestMultiSinkCache(t *testing.T) {
 					APIVersion: "v1",
 					FieldPath:  "spec.containers[3]",
 				},
-				Reason:              "Started",
-				Message:             "some verbose message: 1",
-				Source:              v1.EventSource{Component: "eventTest"},
-				ReportingController: "eventTest",
-				Count:               1,
-				Type:                v1.EventTypeNormal,
+				Reason:  "Started",
+				Message: "some verbose message: 1",
+				Source:  v1.EventSource{Component: "eventTest"},
+				Count:   1,
+				Type:    v1.EventTypeNormal,
 			},
 			expectLog:    `Event(v1.ObjectReference{Kind:"Pod", Namespace:"baz", Name:"foo", UID:"differentUid", APIVersion:"v1", ResourceVersion:"", FieldPath:"spec.containers[3]"}): type: 'Normal' reason: 'Started' some verbose message: 1`,
 			expectUpdate: false,
@@ -819,12 +808,11 @@ func TestMultiSinkCache(t *testing.T) {
 					APIVersion: "v1",
 					FieldPath:  "spec.containers[2]",
 				},
-				Reason:              "Started",
-				Message:             "some verbose message: 1",
-				Source:              v1.EventSource{Component: "eventTest"},
-				ReportingController: "eventTest",
-				Count:               3,
-				Type:                v1.EventTypeNormal,
+				Reason:  "Started",
+				Message: "some verbose message: 1",
+				Source:  v1.EventSource{Component: "eventTest"},
+				Count:   3,
+				Type:    v1.EventTypeNormal,
 			},
 			expectLog:    `Event(v1.ObjectReference{Kind:"Pod", Namespace:"baz", Name:"foo", UID:"bar", APIVersion:"v1", ResourceVersion:"", FieldPath:"spec.containers[2]"}): type: 'Normal' reason: 'Started' some verbose message: 1`,
 			expectUpdate: true,
@@ -848,12 +836,11 @@ func TestMultiSinkCache(t *testing.T) {
 					APIVersion: "v1",
 					FieldPath:  "spec.containers[3]",
 				},
-				Reason:              "Stopped",
-				Message:             "some verbose message: 1",
-				Source:              v1.EventSource{Component: "eventTest"},
-				ReportingController: "eventTest",
-				Count:               1,
-				Type:                v1.EventTypeNormal,
+				Reason:  "Stopped",
+				Message: "some verbose message: 1",
+				Source:  v1.EventSource{Component: "eventTest"},
+				Count:   1,
+				Type:    v1.EventTypeNormal,
 			},
 			expectLog:    `Event(v1.ObjectReference{Kind:"Pod", Namespace:"baz", Name:"foo", UID:"differentUid", APIVersion:"v1", ResourceVersion:"", FieldPath:"spec.containers[3]"}): type: 'Normal' reason: 'Stopped' some verbose message: 1`,
 			expectUpdate: false,
@@ -877,12 +864,11 @@ func TestMultiSinkCache(t *testing.T) {
 					APIVersion: "v1",
 					FieldPath:  "spec.containers[3]",
 				},
-				Reason:              "Stopped",
-				Message:             "some verbose message: 1",
-				Source:              v1.EventSource{Component: "eventTest"},
-				ReportingController: "eventTest",
-				Count:               2,
-				Type:                v1.EventTypeNormal,
+				Reason:  "Stopped",
+				Message: "some verbose message: 1",
+				Source:  v1.EventSource{Component: "eventTest"},
+				Count:   2,
+				Type:    v1.EventTypeNormal,
 			},
 			expectLog:    `Event(v1.ObjectReference{Kind:"Pod", Namespace:"baz", Name:"foo", UID:"differentUid", APIVersion:"v1", ResourceVersion:"", FieldPath:"spec.containers[3]"}): type: 'Normal' reason: 'Stopped' some verbose message: 1`,
 			expectUpdate: true,

tools/record/events_cache_test.go

@@ -115,9 +115,6 @@ func validateEvent(messagePrefix string, actualEvent *v1.Event, expectedEvent *v
 	// Temp clear time stamps for comparison because actual values don't matter for comparison
 	recvEvent.FirstTimestamp = expectedEvent.FirstTimestamp
 	recvEvent.LastTimestamp = expectedEvent.LastTimestamp
-
-	recvEvent.ReportingController = expectedEvent.ReportingController
-
 	// Check that name has the right prefix.
 	if n, en := recvEvent.Name, expectedEvent.Name; !strings.HasPrefix(n, en) {
 		t.Errorf("%v - Name '%v' does not contain prefix '%v'", messagePrefix, n, en)

util/cert/cert.go

@@ -25,7 +25,6 @@ import (
 	"crypto/x509/pkix"
 	"encoding/pem"
 	"fmt"
-	"math"
 	"math/big"
 	"net"
 	"os"
@@ -45,7 +44,6 @@ type Config struct {
 	Organization []string
 	AltNames     AltNames
 	Usages       []x509.ExtKeyUsage
-	NotBefore    time.Time
 }
 
 // AltNames contains the domain names and IP addresses that will be added
@@ -59,24 +57,14 @@ type AltNames struct {
 // NewSelfSignedCACert creates a CA certificate
 func NewSelfSignedCACert(cfg Config, key crypto.Signer) (*x509.Certificate, error) {
 	now := time.Now()
-	// returns a uniform random value in [0, max-1), then add 1 to serial to make it a uniform random value in [1, max).
-	serial, err := cryptorand.Int(cryptorand.Reader, new(big.Int).SetInt64(math.MaxInt64-1))
-	if err != nil {
-		return nil, err
-	}
-	serial = new(big.Int).Add(serial, big.NewInt(1))
-	notBefore := now.UTC()
-	if !cfg.NotBefore.IsZero() {
-		notBefore = cfg.NotBefore.UTC()
-	}
 	tmpl := x509.Certificate{
-		SerialNumber: serial,
+		SerialNumber: new(big.Int).SetInt64(0),
 		Subject: pkix.Name{
 			CommonName:   cfg.CommonName,
 			Organization: cfg.Organization,
 		},
 		DNSNames:              []string{cfg.CommonName},
-		NotBefore:             notBefore,
+		NotBefore:             now.UTC(),
 		NotAfter:              now.Add(duration365d * 10).UTC(),
 		KeyUsage:              x509.KeyUsageKeyEncipherment | x509.KeyUsageDigitalSignature | x509.KeyUsageCertSign,
 		BasicConstraintsValid: true,
@@ -128,14 +116,9 @@ func GenerateSelfSignedCertKeyWithFixtures(host string, alternateIPs []net.IP, a
 	if err != nil {
 		return nil, nil, err
 	}
-	// returns a uniform random value in [0, max-1), then add 1 to serial to make it a uniform random value in [1, max).
-	serial, err := cryptorand.Int(cryptorand.Reader, new(big.Int).SetInt64(math.MaxInt64-1))
-	if err != nil {
-		return nil, nil, err
-	}
-	serial = new(big.Int).Add(serial, big.NewInt(1))
+
 	caTemplate := x509.Certificate{
-		SerialNumber: serial,
+		SerialNumber: big.NewInt(1),
 		Subject: pkix.Name{
 			CommonName: fmt.Sprintf("%s-ca@%d", host, time.Now().Unix()),
 		},
@@ -161,14 +144,9 @@ func GenerateSelfSignedCertKeyWithFixtures(host string, alternateIPs []net.IP, a
 	if err != nil {
 		return nil, nil, err
 	}
-	// returns a uniform random value in [0, max-1), then add 1 to serial to make it a uniform random value in [1, max).
-	serial, err = cryptorand.Int(cryptorand.Reader, new(big.Int).SetInt64(math.MaxInt64-1))
-	if err != nil {
-		return nil, nil, err
-	}
-	serial = new(big.Int).Add(serial, big.NewInt(1))
+
 	template := x509.Certificate{
-		SerialNumber: serial,
+		SerialNumber: big.NewInt(2),
 		Subject: pkix.Name{
 			CommonName: fmt.Sprintf("%s@%d", host, time.Now().Unix()),
 		},