Merge pull request #869 from zalando-incubator/fix-nil-pointer

fix: Nil check Metric.Selector in MetricTypeName

.github/workflows/ci.yaml

@@ -10,8 +10,8 @@ jobs:
   tests:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v5
-    - uses: actions/setup-go@v6.0.0
+    - uses: actions/checkout@v6.0.2
+    - uses: actions/setup-go@v6.2.0
       with:
         go-version: '^1.25'
     - run: go version

.github/workflows/codeql-analysis.yml

@@ -38,10 +38,10 @@ jobs:
 
     steps:
     - name: Checkout repository
-      uses: actions/checkout@v5
+      uses: actions/checkout@v6.0.2
 
     - name: setup go
-      uses: actions/setup-go@v6.0.0
+      uses: actions/setup-go@v6.2.0
       with:
         go-version: '1.25'
 

.github/workflows/gh-packages.yaml

@@ -25,15 +25,15 @@ jobs:
       packages: write # to push packages
     steps:
       - name: Checkout
-        uses: actions/checkout@ff7abcd0c3c05ccf6adc123a8cd1fd4fb30fb493
+        uses: actions/checkout@0c366fd6a839edf440554fa01a7085ccba70ac98
 
-      - uses: actions/setup-go@44694675825211faa026b3c33043df3e48a5fa00
+      - uses: actions/setup-go@a5f9b05d2d216f63e13859e0d847461041025775
         with:
           # https://www.npmjs.com/package/semver#caret-ranges-123-025-004
           go-version: '^1.25'
 
       - name: Login to Github Container Registry
-        uses: docker/login-action@5e57cd118135c172c3672efd75eb46360885c0ef
+        uses: docker/login-action@c94ce9fb468520275223c153574b00df6fe4bcc9
         with:
           registry: ${{ env.REGISTRY }}
           username: ${{ github.actor }}
@@ -47,21 +47,21 @@ jobs:
           make build.linux.amd64 build.linux.arm64
 
       - name: Set up QEMU
-        uses: docker/setup-qemu-action@29109295f81e9208d7d86ff1c6c12d2833863392
+        uses: docker/setup-qemu-action@c7c53464625b32c7a7e944ae62b3e17d2b600130
 
       - name: Set up Docker Buildx
-        uses: docker/setup-buildx-action@e468171a9de216ec08956ac3ada2f0791b6bd435
+        uses: docker/setup-buildx-action@8d2750c68a42422c14e847fe6c8ac0403b4cbd6f
 
       - name: Login to GitHub Container Registry
         if: github.event_name != 'pull_request'
-        uses: docker/login-action@5e57cd118135c172c3672efd75eb46360885c0ef
+        uses: docker/login-action@c94ce9fb468520275223c153574b00df6fe4bcc9
         with:
           registry: ghcr.io
           username: ${{ github.actor }}
           password: ${{ secrets.GITHUB_TOKEN }}
 
       - name: Docker meta
-        uses: docker/metadata-action@c1e51972afc2121e065aed6d45c65596fe445f3f
+        uses: docker/metadata-action@c299e40c65443455700f0fdfc63efafe5b349051
         id: meta
         with:
           images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}

.github/workflows/release-chart.yml

@@ -10,7 +10,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6.0.2
         with:
           fetch-depth: 0
 

docs/helm/templates/custom-metrics-apiservice.yaml

@@ -3,6 +3,13 @@ apiVersion: apiregistration.k8s.io/v1
 kind: APIService
 metadata:
   name: v1beta1.custom.metrics.k8s.io
+  {{- with .Values.customMetricsApi.annotations }}
+  annotations:
+    {{- range $k, $v := . }}
+      {{- $value := $v | quote }}
+      {{- printf "%s: %s" (tpl $k $) (tpl $value $) | nindent 4 }}
+    {{- end }}
+  {{- end }}
 spec:
   service:
     name: kube-metrics-adapter
@@ -13,3 +20,4 @@ spec:
   groupPriorityMinimum: 100
   versionPriority: 100
 {{- end}}
+""

docs/helm/templates/external-metrics-apiservice.yaml

@@ -3,6 +3,13 @@ apiVersion: apiregistration.k8s.io/v1
 kind: APIService
 metadata:
   name: v1beta1.external.metrics.k8s.io
+  {{- with .Values.externalMetricsApi.annotations }}
+  annotations:
+    {{- range $k, $v := . }}
+      {{- $value := $v | quote }}
+      {{- printf "%s: %s" (tpl $k $) (tpl $value $) | nindent 4 }}
+    {{- end }}
+  {{- end }}
 spec:
   service:
     name: kube-metrics-adapter

docs/helm/values.yaml

@@ -15,7 +15,19 @@ addDirectoryHeader:
 contentionProfiling:
 profiling:
 enableCustomMetricsApi: true
+
+# -- add annotations to the custom metrics apiservice resource, e.g.
+# cert-manager.io/inject-ca-from: {{.Release.Namespace}}/kube-metrics-adapter to inject the CA certificate form a cert-manager-issued cert used for the deployment
+customMetricsApi:
+  annotations: {}
+
 enableExternalMetricsApi: true
+
+# -- add annotations to the custom metrics apiservice resource, e.g.
+# cert-manager.io/inject-ca-from: {{.Release.Namespace}}/kube-metrics-adapter to inject the CA certificate form a cert-manager-issued cert used for the deployment
+externalMetricsApi:
+  annotations: {}
+
 credentialsDirectory:
 disregardIncompatibleHPAs:
 http2MaxStreamsPerConnection:

go.mod

@@ -1,32 +1,31 @@
 module github.com/zalando-incubator/kube-metrics-adapter
 
 require (
-	github.com/argoproj/argo-rollouts v1.8.3
-	github.com/aws/aws-sdk-go-v2 v1.39.2
-	github.com/aws/aws-sdk-go-v2/config v1.31.12
-	github.com/aws/aws-sdk-go-v2/service/sqs v1.42.8
+	github.com/argoproj/argo-rollouts v1.8.4
+	github.com/aws/aws-sdk-go-v2 v1.41.1
+	github.com/aws/aws-sdk-go-v2/config v1.32.7
+	github.com/aws/aws-sdk-go-v2/service/sqs v1.42.21
 	github.com/influxdata/influxdb-client-go v1.4.0
 	github.com/prometheus/client_golang v1.23.2
-	github.com/prometheus/common v0.67.1
-	github.com/sirupsen/logrus v1.9.3
-	github.com/spf13/cobra v1.10.1
+	github.com/prometheus/common v0.67.5
+	github.com/sirupsen/logrus v1.9.4
+	github.com/spf13/cobra v1.10.2
 	github.com/spyzhov/ajson v0.9.6
 	github.com/stretchr/testify v1.11.1
 	github.com/szuecs/routegroup-client v0.34.1
 	github.com/zalando-incubator/cluster-lifecycle-manager v0.0.0-20250912104308-4489de744ee3
-	golang.org/x/net v0.46.0
-	golang.org/x/oauth2 v0.32.0
-	golang.org/x/sync v0.17.0
-	k8s.io/api v0.34.1
-	k8s.io/apimachinery v0.34.1
-	k8s.io/apiserver v0.34.1
-	k8s.io/client-go v0.34.1
-	k8s.io/component-base v0.34.1
+	golang.org/x/oauth2 v0.35.0
+	golang.org/x/sync v0.19.0
+	k8s.io/api v0.34.4
+	k8s.io/apimachinery v0.34.4
+	k8s.io/apiserver v0.34.4
+	k8s.io/client-go v0.34.4
+	k8s.io/component-base v0.34.4
 	k8s.io/klog v1.0.0
-	k8s.io/kube-openapi v0.0.0-20250710124328-f3f2b991d03b
-	k8s.io/metrics v0.33.5
-	k8s.io/utils v0.0.0-20250604170112-4c0f3b243397
-	sigs.k8s.io/custom-metrics-apiserver v1.33.0
+	k8s.io/kube-openapi v0.0.0-20250910181357-589584f1c912
+	k8s.io/metrics v0.34.4
+	k8s.io/utils v0.0.0-20251002143259-bc988d571ff4
+	sigs.k8s.io/custom-metrics-apiserver v1.34.0
 )
 
 require (
@@ -40,17 +39,18 @@ require (
 	github.com/andybalholm/brotli v1.1.0 // indirect
 	github.com/antlr4-go/antlr/v4 v4.13.0 // indirect
 	github.com/apapsch/go-jsonmerge/v2 v2.0.0 // indirect
-	github.com/aws/aws-sdk-go-v2/credentials v1.18.16 // indirect
-	github.com/aws/aws-sdk-go-v2/feature/ec2/imds v1.18.9 // indirect
-	github.com/aws/aws-sdk-go-v2/internal/configsources v1.4.9 // indirect
-	github.com/aws/aws-sdk-go-v2/internal/endpoints/v2 v2.7.9 // indirect
-	github.com/aws/aws-sdk-go-v2/internal/ini v1.8.3 // indirect
-	github.com/aws/aws-sdk-go-v2/service/internal/accept-encoding v1.13.1 // indirect
-	github.com/aws/aws-sdk-go-v2/service/internal/presigned-url v1.13.9 // indirect
-	github.com/aws/aws-sdk-go-v2/service/sso v1.29.6 // indirect
-	github.com/aws/aws-sdk-go-v2/service/ssooidc v1.35.1 // indirect
-	github.com/aws/aws-sdk-go-v2/service/sts v1.38.6 // indirect
-	github.com/aws/smithy-go v1.23.0 // indirect
+	github.com/aws/aws-sdk-go-v2/credentials v1.19.7 // indirect
+	github.com/aws/aws-sdk-go-v2/feature/ec2/imds v1.18.17 // indirect
+	github.com/aws/aws-sdk-go-v2/internal/configsources v1.4.17 // indirect
+	github.com/aws/aws-sdk-go-v2/internal/endpoints/v2 v2.7.17 // indirect
+	github.com/aws/aws-sdk-go-v2/internal/ini v1.8.4 // indirect
+	github.com/aws/aws-sdk-go-v2/service/internal/accept-encoding v1.13.4 // indirect
+	github.com/aws/aws-sdk-go-v2/service/internal/presigned-url v1.13.17 // indirect
+	github.com/aws/aws-sdk-go-v2/service/signin v1.0.5 // indirect
+	github.com/aws/aws-sdk-go-v2/service/sso v1.30.9 // indirect
+	github.com/aws/aws-sdk-go-v2/service/ssooidc v1.35.13 // indirect
+	github.com/aws/aws-sdk-go-v2/service/sts v1.41.6 // indirect
+	github.com/aws/smithy-go v1.24.0 // indirect
 	github.com/aymerick/douceur v0.2.0 // indirect
 	github.com/beorn7/perks v1.0.1 // indirect
 	github.com/blang/semver/v4 v4.0.0 // indirect
@@ -64,7 +64,7 @@ require (
 	github.com/coreos/go-systemd/v22 v22.5.0 // indirect
 	github.com/davecgh/go-spew v1.1.2-0.20180830191138-d8f796af33cc // indirect
 	github.com/deepmap/oapi-codegen v1.16.3 // indirect
-	github.com/emicklei/go-restful/v3 v3.12.2 // indirect
+	github.com/emicklei/go-restful/v3 v3.13.0 // indirect
 	github.com/fatih/color v1.18.0 // indirect
 	github.com/fatih/structs v1.1.0 // indirect
 	github.com/felixge/httpsnoop v1.0.4 // indirect
@@ -174,18 +174,19 @@ require (
 	go.yaml.in/yaml/v2 v2.4.3 // indirect
 	go.yaml.in/yaml/v3 v3.0.4 // indirect
 	golang.org/x/arch v0.8.0 // indirect
-	golang.org/x/crypto v0.43.0 // indirect
+	golang.org/x/crypto v0.46.0 // indirect
 	golang.org/x/exp v0.0.0-20240719175910-8a7402abbf56 // indirect
-	golang.org/x/mod v0.28.0 // indirect
-	golang.org/x/sys v0.37.0 // indirect
-	golang.org/x/term v0.36.0 // indirect
-	golang.org/x/text v0.30.0 // indirect
+	golang.org/x/mod v0.30.0 // indirect
+	golang.org/x/net v0.48.0 // indirect
+	golang.org/x/sys v0.39.0 // indirect
+	golang.org/x/term v0.38.0 // indirect
+	golang.org/x/text v0.32.0 // indirect
 	golang.org/x/time v0.11.0 // indirect
-	golang.org/x/tools v0.37.0 // indirect
+	golang.org/x/tools v0.39.0 // indirect
 	google.golang.org/genproto/googleapis/api v0.0.0-20250303144028-a0af3efb3deb // indirect
 	google.golang.org/genproto/googleapis/rpc v0.0.0-20250303144028-a0af3efb3deb // indirect
 	google.golang.org/grpc v1.72.1 // indirect
-	google.golang.org/protobuf v1.36.10 // indirect
+	google.golang.org/protobuf v1.36.11 // indirect
 	gopkg.in/evanphx/json-patch.v4 v4.12.0 // indirect
 	gopkg.in/inf.v0 v0.9.1 // indirect
 	gopkg.in/ini.v1 v1.67.0 // indirect
@@ -193,10 +194,10 @@ require (
 	gopkg.in/yaml.v2 v2.4.0 // indirect
 	gopkg.in/yaml.v3 v3.0.1 // indirect
 	k8s.io/apiextensions-apiserver v0.34.0 // indirect
-	k8s.io/code-generator v0.34.1 // indirect
+	k8s.io/code-generator v0.34.4 // indirect
 	k8s.io/gengo/v2 v2.0.0-20250604051438-85fd79dbfd9f // indirect
 	k8s.io/klog/v2 v2.130.1 // indirect
-	k8s.io/kms v0.34.1 // indirect
+	k8s.io/kms v0.34.4 // indirect
 	sigs.k8s.io/apiserver-network-proxy/konnectivity-client v0.31.2 // indirect
 	sigs.k8s.io/controller-tools v0.19.0 // indirect
 	sigs.k8s.io/json v0.0.0-20241014173422-cfa47c3a1cc8 // indirect

go.sum

@@ -25,36 +25,38 @@ github.com/antlr4-go/antlr/v4 v4.13.0 h1:lxCg3LAv+EUK6t1i0y1V6/SLeUi0eKEKdhQAlS8
 github.com/antlr4-go/antlr/v4 v4.13.0/go.mod h1:pfChB/xh/Unjila75QW7+VU4TSnWnnk9UTnmpPaOR2g=
 github.com/apapsch/go-jsonmerge/v2 v2.0.0 h1:axGnT1gRIfimI7gJifB699GoE/oq+F2MU7Dml6nw9rQ=
 github.com/apapsch/go-jsonmerge/v2 v2.0.0/go.mod h1:lvDnEdqiQrp0O42VQGgmlKpxL1AP2+08jFMw88y4klk=
-github.com/argoproj/argo-rollouts v1.8.3 h1:blbtQva4IK9r6gFh+dWkCrLnFdPOWiv9ubQYu36qeaA=
-github.com/argoproj/argo-rollouts v1.8.3/go.mod h1:kCAUvIfMGfOyVf3lvQbBt0nqQn4Pd+zB5/YwKv+UBa8=
-github.com/aws/aws-sdk-go-v2 v1.39.2 h1:EJLg8IdbzgeD7xgvZ+I8M1e0fL0ptn/M47lianzth0I=
-github.com/aws/aws-sdk-go-v2 v1.39.2/go.mod h1:sDioUELIUO9Znk23YVmIk86/9DOpkbyyVb1i/gUNFXY=
-github.com/aws/aws-sdk-go-v2/config v1.31.12 h1:pYM1Qgy0dKZLHX2cXslNacbcEFMkDMl+Bcj5ROuS6p8=
-github.com/aws/aws-sdk-go-v2/config v1.31.12/go.mod h1:/MM0dyD7KSDPR+39p9ZNVKaHDLb9qnfDurvVS2KAhN8=
-github.com/aws/aws-sdk-go-v2/credentials v1.18.16 h1:4JHirI4zp958zC026Sm+V4pSDwW4pwLefKrc0bF2lwI=
-github.com/aws/aws-sdk-go-v2/credentials v1.18.16/go.mod h1:qQMtGx9OSw7ty1yLclzLxXCRbrkjWAM7JnObZjmCB7I=
-github.com/aws/aws-sdk-go-v2/feature/ec2/imds v1.18.9 h1:Mv4Bc0mWmv6oDuSWTKnk+wgeqPL5DRFu5bQL9BGPQ8Y=
-github.com/aws/aws-sdk-go-v2/feature/ec2/imds v1.18.9/go.mod h1:IKlKfRppK2a1y0gy1yH6zD+yX5uplJ6UuPlgd48dJiQ=
-github.com/aws/aws-sdk-go-v2/internal/configsources v1.4.9 h1:se2vOWGD3dWQUtfn4wEjRQJb1HK1XsNIt825gskZ970=
-github.com/aws/aws-sdk-go-v2/internal/configsources v1.4.9/go.mod h1:hijCGH2VfbZQxqCDN7bwz/4dzxV+hkyhjawAtdPWKZA=
-github.com/aws/aws-sdk-go-v2/internal/endpoints/v2 v2.7.9 h1:6RBnKZLkJM4hQ+kN6E7yWFveOTg8NLPHAkqrs4ZPlTU=
-github.com/aws/aws-sdk-go-v2/internal/endpoints/v2 v2.7.9/go.mod h1:V9rQKRmK7AWuEsOMnHzKj8WyrIir1yUJbZxDuZLFvXI=
-github.com/aws/aws-sdk-go-v2/internal/ini v1.8.3 h1:bIqFDwgGXXN1Kpp99pDOdKMTTb5d2KyU5X/BZxjOkRo=
-github.com/aws/aws-sdk-go-v2/internal/ini v1.8.3/go.mod h1:H5O/EsxDWyU+LP/V8i5sm8cxoZgc2fdNR9bxlOFrQTo=
-github.com/aws/aws-sdk-go-v2/service/internal/accept-encoding v1.13.1 h1:oegbebPEMA/1Jny7kvwejowCaHz1FWZAQ94WXFNCyTM=
-github.com/aws/aws-sdk-go-v2/service/internal/accept-encoding v1.13.1/go.mod h1:kemo5Myr9ac0U9JfSjMo9yHLtw+pECEHsFtJ9tqCEI8=
-github.com/aws/aws-sdk-go-v2/service/internal/presigned-url v1.13.9 h1:5r34CgVOD4WZudeEKZ9/iKpiT6cM1JyEROpXjOcdWv8=
-github.com/aws/aws-sdk-go-v2/service/internal/presigned-url v1.13.9/go.mod h1:dB12CEbNWPbzO2uC6QSWHteqOg4JfBVJOojbAoAUb5I=
-github.com/aws/aws-sdk-go-v2/service/sqs v1.42.8 h1:cWiY+//XL5QOYKJyf4Pvt+oE/5wSIi095+bS+ME2lGw=
-github.com/aws/aws-sdk-go-v2/service/sqs v1.42.8/go.mod h1:sLvnKf0p0sMQ33nkJGP2NpYyWHMojpL0O9neiCGc9lc=
-github.com/aws/aws-sdk-go-v2/service/sso v1.29.6 h1:A1oRkiSQOWstGh61y4Wc/yQ04sqrQZr1Si/oAXj20/s=
-github.com/aws/aws-sdk-go-v2/service/sso v1.29.6/go.mod h1:5PfYspyCU5Vw1wNPsxi15LZovOnULudOQuVxphSflQA=
-github.com/aws/aws-sdk-go-v2/service/ssooidc v1.35.1 h1:5fm5RTONng73/QA73LhCNR7UT9RpFH3hR6HWL6bIgVY=
-github.com/aws/aws-sdk-go-v2/service/ssooidc v1.35.1/go.mod h1:xBEjWD13h+6nq+z4AkqSfSvqRKFgDIQeaMguAJndOWo=
-github.com/aws/aws-sdk-go-v2/service/sts v1.38.6 h1:p3jIvqYwUZgu/XYeI48bJxOhvm47hZb5HUQ0tn6Q9kA=
-github.com/aws/aws-sdk-go-v2/service/sts v1.38.6/go.mod h1:WtKK+ppze5yKPkZ0XwqIVWD4beCwv056ZbPQNoeHqM8=
-github.com/aws/smithy-go v1.23.0 h1:8n6I3gXzWJB2DxBDnfxgBaSX6oe0d/t10qGz7OKqMCE=
-github.com/aws/smithy-go v1.23.0/go.mod h1:t1ufH5HMublsJYulve2RKmHDC15xu1f26kHCp/HgceI=
+github.com/argoproj/argo-rollouts v1.8.4 h1:yRoN6/mNtb9H2VHhL09ZvF3ZfajerOrKB3EhgIGoz6c=
+github.com/argoproj/argo-rollouts v1.8.4/go.mod h1:/J99JlgiXreVVjJUIXTsguvubJRNBtYKAhIrx0UdaS8=
+github.com/aws/aws-sdk-go-v2 v1.41.1 h1:ABlyEARCDLN034NhxlRUSZr4l71mh+T5KAeGh6cerhU=
+github.com/aws/aws-sdk-go-v2 v1.41.1/go.mod h1:MayyLB8y+buD9hZqkCW3kX1AKq07Y5pXxtgB+rRFhz0=
+github.com/aws/aws-sdk-go-v2/config v1.32.7 h1:vxUyWGUwmkQ2g19n7JY/9YL8MfAIl7bTesIUykECXmY=
+github.com/aws/aws-sdk-go-v2/config v1.32.7/go.mod h1:2/Qm5vKUU/r7Y+zUk/Ptt2MDAEKAfUtKc1+3U1Mo3oY=
+github.com/aws/aws-sdk-go-v2/credentials v1.19.7 h1:tHK47VqqtJxOymRrNtUXN5SP/zUTvZKeLx4tH6PGQc8=
+github.com/aws/aws-sdk-go-v2/credentials v1.19.7/go.mod h1:qOZk8sPDrxhf+4Wf4oT2urYJrYt3RejHSzgAquYeppw=
+github.com/aws/aws-sdk-go-v2/feature/ec2/imds v1.18.17 h1:I0GyV8wiYrP8XpA70g1HBcQO1JlQxCMTW9npl5UbDHY=
+github.com/aws/aws-sdk-go-v2/feature/ec2/imds v1.18.17/go.mod h1:tyw7BOl5bBe/oqvoIeECFJjMdzXoa/dfVz3QQ5lgHGA=
+github.com/aws/aws-sdk-go-v2/internal/configsources v1.4.17 h1:xOLELNKGp2vsiteLsvLPwxC+mYmO6OZ8PYgiuPJzF8U=
+github.com/aws/aws-sdk-go-v2/internal/configsources v1.4.17/go.mod h1:5M5CI3D12dNOtH3/mk6minaRwI2/37ifCURZISxA/IQ=
+github.com/aws/aws-sdk-go-v2/internal/endpoints/v2 v2.7.17 h1:WWLqlh79iO48yLkj1v3ISRNiv+3KdQoZ6JWyfcsyQik=
+github.com/aws/aws-sdk-go-v2/internal/endpoints/v2 v2.7.17/go.mod h1:EhG22vHRrvF8oXSTYStZhJc1aUgKtnJe+aOiFEV90cM=
+github.com/aws/aws-sdk-go-v2/internal/ini v1.8.4 h1:WKuaxf++XKWlHWu9ECbMlha8WOEGm0OUEZqm4K/Gcfk=
+github.com/aws/aws-sdk-go-v2/internal/ini v1.8.4/go.mod h1:ZWy7j6v1vWGmPReu0iSGvRiise4YI5SkR3OHKTZ6Wuc=
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@@ -90,8 +92,8 @@ github.com/deepmap/oapi-codegen v1.16.3/go.mod h1:JD6ErqeX0nYnhdciLc61Konj3NBASR
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@@ -313,8 +315,8 @@ github.com/prometheus/client_golang v1.23.2 h1:Je96obch5RDVy3FDMndoUsjAhG5Edi49h
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@@ -328,12 +330,12 @@ github.com/schollz/closestmatch v2.1.0+incompatible/go.mod h1:RtP1ddjLong6gTkbtm
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@@ -460,15 +462,15 @@ golang.org/x/crypto v0.0.0-20190701094942-4def268fd1a4/go.mod h1:yigFU9vqHzYiE8U
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@@ -476,16 +478,16 @@ golang.org/x/net v0.0.0-20191112182307-2180aed22343/go.mod h1:z5CRVTTTmAJ677TzLL
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@@ -497,22 +499,21 @@ golang.org/x/sys v0.0.0-20200930185726-fdedc70b468f/go.mod h1:h1NjWce9XRLGQEsW7w
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@@ -521,8 +522,8 @@ golang.org/x/tools v0.0.0-20191125144606-a911d9008d1f/go.mod h1:b+2E5dAYhXwXZwtn
 golang.org/x/tools v0.0.0-20200619180055-7c47624df98f/go.mod h1:EkVYQZoAsY45+roYkvgYkIh4xh/qjgUK9TdY2XT94GE=
 golang.org/x/tools v0.0.0-20210106214847-113979e3529a/go.mod h1:emZCQorbCU4vsT4fOWvOPXz4eW1wZW4PmDk9uLelYpA=
 golang.org/x/tools v0.1.9/go.mod h1:nABZi5QlRsZVlzPpHl034qft6wpY4eDcsTt5AaioBiU=
-golang.org/x/tools v0.37.0 h1:DVSRzp7FwePZW356yEAChSdNcQo6Nsp+fex1SUW09lE=
-golang.org/x/tools v0.37.0/go.mod h1:MBN5QPQtLMHVdvsbtarmTNukZDdgwdwlO5qGacAzF0w=
+golang.org/x/tools v0.39.0 h1:ik4ho21kwuQln40uelmciQPp9SipgNDdrafrYA4TmQQ=
+golang.org/x/tools v0.39.0/go.mod h1:JnefbkDPyD8UU2kI5fuf8ZX4/yUeh9W877ZeBONxUqQ=
 golang.org/x/tools/go/expect v0.1.0-deprecated h1:jY2C5HGYR5lqex3gEniOQL0r7Dq5+VGVgY1nudX5lXY=
 golang.org/x/tools/go/expect v0.1.0-deprecated/go.mod h1:eihoPOH+FgIqa3FpoTwguz/bVUSGBlGQU67vpBeOrBY=
 golang.org/x/tools/go/packages/packagestest v0.1.1-deprecated h1:1h2MnaIAIXISqTFKdENegdpAgUXz6NrPEsbIeWaBRvM=
@@ -537,8 +538,8 @@ google.golang.org/genproto/googleapis/rpc v0.0.0-20250303144028-a0af3efb3deb h1:
 google.golang.org/genproto/googleapis/rpc v0.0.0-20250303144028-a0af3efb3deb/go.mod h1:LuRYeWDFV6WOn90g357N17oMCaxpgCnbi/44qJvDn2I=
 google.golang.org/grpc v1.72.1 h1:HR03wO6eyZ7lknl75XlxABNVLLFc2PAb6mHlYh756mA=
 google.golang.org/grpc v1.72.1/go.mod h1:wH5Aktxcg25y1I3w7H69nHfXdOG3UiadoBtjh3izSDM=
-google.golang.org/protobuf v1.36.10 h1:AYd7cD/uASjIL6Q9LiTjz8JLcrh/88q5UObnmY3aOOE=
-google.golang.org/protobuf v1.36.10/go.mod h1:HTf+CrKn2C3g5S8VImy6tdcUvCska2kB7j23XfzDpco=
+google.golang.org/protobuf v1.36.11 h1:fV6ZwhNocDyBLK0dj+fg8ektcVegBBuEolpbTQyBNVE=
+google.golang.org/protobuf v1.36.11/go.mod h1:HTf+CrKn2C3g5S8VImy6tdcUvCska2kB7j23XfzDpco=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/check.v1 v1.0.0-20200902074654-038fdea0a05b/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
@@ -561,34 +562,34 @@ gopkg.in/yaml.v2 v2.4.0/go.mod h1:RDklbk79AGWmwhnvt/jBztapEOGDOx6ZbXqjP6csGnQ=
 gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
 gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
 gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
-k8s.io/api v0.34.1 h1:jC+153630BMdlFukegoEL8E/yT7aLyQkIVuwhmwDgJM=
-k8s.io/api v0.34.1/go.mod h1:SB80FxFtXn5/gwzCoN6QCtPD7Vbu5w2n1S0J5gFfTYk=
+k8s.io/api v0.34.4 h1:Z5hsoQcZ2yBjelb9j5JKzCVo9qv9XLkVm5llnqS4h+0=
+k8s.io/api v0.34.4/go.mod h1:6SaGYuGPkMqqCgg8rPG/OQoCrhgSEV+wWn9v21fDP3o=
 k8s.io/apiextensions-apiserver v0.34.0 h1:B3hiB32jV7BcyKcMU5fDaDxk882YrJ1KU+ZSkA9Qxoc=
 k8s.io/apiextensions-apiserver v0.34.0/go.mod h1:hLI4GxE1BDBy9adJKxUxCEHBGZtGfIg98Q+JmTD7+g0=
-k8s.io/apimachinery v0.34.1 h1:dTlxFls/eikpJxmAC7MVE8oOeP1zryV7iRyIjB0gky4=
-k8s.io/apimachinery v0.34.1/go.mod h1:/GwIlEcWuTX9zKIg2mbw0LRFIsXwrfoVxn+ef0X13lw=
-k8s.io/apiserver v0.34.1 h1:U3JBGdgANK3dfFcyknWde1G6X1F4bg7PXuvlqt8lITA=
-k8s.io/apiserver v0.34.1/go.mod h1:eOOc9nrVqlBI1AFCvVzsob0OxtPZUCPiUJL45JOTBG0=
-k8s.io/client-go v0.34.1 h1:ZUPJKgXsnKwVwmKKdPfw4tB58+7/Ik3CrjOEhsiZ7mY=
-k8s.io/client-go v0.34.1/go.mod h1:kA8v0FP+tk6sZA0yKLRG67LWjqufAoSHA2xVGKw9Of8=
-k8s.io/code-generator v0.34.1 h1:WpphT26E+j7tEgIUfFr5WfbJrktCGzB3JoJH9149xYc=
-k8s.io/code-generator v0.34.1/go.mod h1:DeWjekbDnJWRwpw3s0Jat87c+e0TgkxoR4ar608yqvg=
-k8s.io/component-base v0.34.1 h1:v7xFgG+ONhytZNFpIz5/kecwD+sUhVE6HU7qQUiRM4A=
-k8s.io/component-base v0.34.1/go.mod h1:mknCpLlTSKHzAQJJnnHVKqjxR7gBeHRv0rPXA7gdtQ0=
+k8s.io/apimachinery v0.34.4 h1:C5SiSzLEMyWIk53sSbnk0WlOOyqv/MFnWvuc/d6M+xc=
+k8s.io/apimachinery v0.34.4/go.mod h1:/GwIlEcWuTX9zKIg2mbw0LRFIsXwrfoVxn+ef0X13lw=
+k8s.io/apiserver v0.34.4 h1:QmMakuCjlFBJpsXKIUom8OUE7+PhZk7hyNiLqlyDH58=
+k8s.io/apiserver v0.34.4/go.mod h1:4dM2Pfd+VQQA/4pLVPorZJbIadaTLcvgQn2GYYcA6Ic=
+k8s.io/client-go v0.34.4 h1:IXhvzFdm0e897kXtLbeyMpAGzontcShJ/gi/XCCsOLc=
+k8s.io/client-go v0.34.4/go.mod h1:tXIVJTQabT5QRGlFdxZQFxrIhcGUPpKL5DAc4gSWTE8=
+k8s.io/code-generator v0.34.4 h1:ri/HSQ1eCQ40pqTQ4HeEiC8UR/SaftH/syav9RL4b+c=
+k8s.io/code-generator v0.34.4/go.mod h1:JbvI8dtG5KB5HJSFzExSbvigBSG8gCncyMtdwg/NVbw=
+k8s.io/component-base v0.34.4 h1:jP4XqR48YelfXIlRpOHQgms5GebU23zSE6xcvTwpXDE=
+k8s.io/component-base v0.34.4/go.mod h1:uujRfLNOwNiFWz47eBjNZEj/Swn2cdhqI7lW2MeFdrU=
 k8s.io/gengo/v2 v2.0.0-20250604051438-85fd79dbfd9f h1:SLb+kxmzfA87x4E4brQzB33VBbT2+x7Zq9ROIHmGn9Q=
 k8s.io/gengo/v2 v2.0.0-20250604051438-85fd79dbfd9f/go.mod h1:EJykeLsmFC60UQbYJezXkEsG2FLrt0GPNkU5iK5GWxU=
 k8s.io/klog v1.0.0 h1:Pt+yjF5aB1xDSVbau4VsWe+dQNzA0qv1LlXdC2dF6Q8=
 k8s.io/klog v1.0.0/go.mod h1:4Bi6QPql/J/LkTDqv7R/cd3hPo4k2DG6Ptcz060Ez5I=
 k8s.io/klog/v2 v2.130.1 h1:n9Xl7H1Xvksem4KFG4PYbdQCQxqc/tTUyrgXaOhHSzk=
 k8s.io/klog/v2 v2.130.1/go.mod h1:3Jpz1GvMt720eyJH1ckRHK1EDfpxISzJ7I9OYgaDtPE=
-k8s.io/kms v0.34.1 h1:iCFOvewDPzWM9fMTfyIPO+4MeuZ0tcZbugxLNSHFG4w=
-k8s.io/kms v0.34.1/go.mod h1:s1CFkLG7w9eaTYvctOxosx88fl4spqmixnNpys0JAtM=
-k8s.io/kube-openapi v0.0.0-20250710124328-f3f2b991d03b h1:MloQ9/bdJyIu9lb1PzujOPolHyvO06MXG5TUIj2mNAA=
-k8s.io/kube-openapi v0.0.0-20250710124328-f3f2b991d03b/go.mod h1:UZ2yyWbFTpuhSbFhv24aGNOdoRdJZgsIObGBUaYVsts=
-k8s.io/metrics v0.33.5 h1:dOG+Yh4SZ6TJ7LcjvVXrYFvZ9G+sogCpTWyhoOVgQCE=
-k8s.io/metrics v0.33.5/go.mod h1:YvBlRD01hos/j7dmjdtSBaZbmGyCJrxVS977x5+Y1kk=
-k8s.io/utils v0.0.0-20250604170112-4c0f3b243397 h1:hwvWFiBzdWw1FhfY1FooPn3kzWuJ8tmbZBHi4zVsl1Y=
-k8s.io/utils v0.0.0-20250604170112-4c0f3b243397/go.mod h1:OLgZIPagt7ERELqWJFomSt595RzquPNLL48iOWgYOg0=
+k8s.io/kms v0.34.4 h1:jF1s1e0CZsM8UXtzqz8JYIBhI4EQIvZHQ15K28StUJA=
+k8s.io/kms v0.34.4/go.mod h1:s1CFkLG7w9eaTYvctOxosx88fl4spqmixnNpys0JAtM=
+k8s.io/kube-openapi v0.0.0-20250910181357-589584f1c912 h1:Y3gxNAuB0OBLImH611+UDZcmKS3g6CthxToOb37KgwE=
+k8s.io/kube-openapi v0.0.0-20250910181357-589584f1c912/go.mod h1:kdmbQkyfwUagLfXIad1y2TdrjPFWp2Q89B3qkRwf/pQ=
+k8s.io/metrics v0.34.4 h1:u/0EwE8M1BHwlfDUjyAlDInm8Y545lQ6lU2bZTvq/tE=
+k8s.io/metrics v0.34.4/go.mod h1:rH8Uul1TDHXdbBwuRh9ilZpUOfPiUJu99GhbYSE2X90=
+k8s.io/utils v0.0.0-20251002143259-bc988d571ff4 h1:SjGebBtkBqHFOli+05xYbK8YF1Dzkbzn+gDM4X9T4Ck=
+k8s.io/utils v0.0.0-20251002143259-bc988d571ff4/go.mod h1:OLgZIPagt7ERELqWJFomSt595RzquPNLL48iOWgYOg0=
 moul.io/http2curl/v2 v2.3.0 h1:9r3JfDzWPcbIklMOs2TnIFzDYvfAZvjeavG6EzP7jYs=
 moul.io/http2curl/v2 v2.3.0/go.mod h1:RW4hyBjTWSYDOxapodpNEtX0g5Eb16sxklBqmd2RHcE=
 nullprogram.com/x/optparse v1.0.0/go.mod h1:KdyPE+Igbe0jQUrVfMqDMeJQIJZEuyV7pjYmp6pbG50=
@@ -597,8 +598,8 @@ sigs.k8s.io/apiserver-network-proxy/konnectivity-client v0.31.2 h1:jpcvIRr3GLoUo
 sigs.k8s.io/apiserver-network-proxy/konnectivity-client v0.31.2/go.mod h1:Ve9uj1L+deCXFrPOk1LpFXqTg7LCFzFso6PA48q/XZw=
 sigs.k8s.io/controller-tools v0.19.0 h1:OU7jrPPiZusryu6YK0jYSjPqg8Vhf8cAzluP9XGI5uk=
 sigs.k8s.io/controller-tools v0.19.0/go.mod h1:y5HY/iNDFkmFla2CfQoVb2AQXMsBk4ad84iR1PLANB0=
-sigs.k8s.io/custom-metrics-apiserver v1.33.0 h1:9uHgBT8ah8PZG+iMAhkXH25kIOmWs7JcrasFA0d83rI=
-sigs.k8s.io/custom-metrics-apiserver v1.33.0/go.mod h1:7lxzUW4z5aEaXOtqOdzh8+pzJ/gT/E3B6LooxIP3tKc=
+sigs.k8s.io/custom-metrics-apiserver v1.34.0 h1:LoDRJMLYbV+x5mDUO6gxNQtR9SKuIVAgbLLC3ybYCPQ=
+sigs.k8s.io/custom-metrics-apiserver v1.34.0/go.mod h1:vBXu7FqpxPoHgiaDjU6TAB2XxU7yFhiWcf0RPai3qhs=
 sigs.k8s.io/json v0.0.0-20241014173422-cfa47c3a1cc8 h1:gBQPwqORJ8d8/YNZWEjoZs7npUVDpVXUUOFfW6CgAqE=
 sigs.k8s.io/json v0.0.0-20241014173422-cfa47c3a1cc8/go.mod h1:mdzfpAEoE6DHQEN0uh9ZbOCuHbLK5wOm7dK4ctXE9Tg=
 sigs.k8s.io/randfill v1.0.0 h1:JfjMILfT8A6RbawdsK2JXGBR5AQVfd+9TbzrlneTyrU=

pkg/api/generated/openapi/zz_generated.openapi.go

@@ -268,7 +268,6 @@ func GetOpenAPIDefinitions(ref common.ReferenceCallback) map[string]common.OpenA
 		"k8s.io/api/core/v1.WeightedPodAffinityTerm":                               schema_k8sio_api_core_v1_WeightedPodAffinityTerm(ref),
 		"k8s.io/api/core/v1.WindowsSecurityContextOptions":                         schema_k8sio_api_core_v1_WindowsSecurityContextOptions(ref),
 		"k8s.io/apimachinery/pkg/api/resource.Quantity":                            schema_apimachinery_pkg_api_resource_Quantity(ref),
-		"k8s.io/apimachinery/pkg/api/resource.int64Amount":                         schema_apimachinery_pkg_api_resource_int64Amount(ref),
 		"k8s.io/apimachinery/pkg/apis/meta/v1.APIGroup":                            schema_pkg_apis_meta_v1_APIGroup(ref),
 		"k8s.io/apimachinery/pkg/apis/meta/v1.APIGroupList":                        schema_pkg_apis_meta_v1_APIGroupList(ref),
 		"k8s.io/apimachinery/pkg/apis/meta/v1.APIResource":                         schema_pkg_apis_meta_v1_APIResource(ref),
@@ -15167,15 +15166,12 @@ func schema_pkg_apis_meta_v1_InternalEvent(ref common.ReferenceCallback) common.
 					"Object": {
 						SchemaProps: spec.SchemaProps{
 							Description: "Object is:\n * If Type is Added or Modified: the new state of the object.\n * If Type is Deleted: the state of the object immediately before deletion.\n * If Type is Bookmark: the object (instance of a type being watched) where\n   only ResourceVersion field is set. On successful restart of watch from a\n   bookmark resourceVersion, client is guaranteed to not get repeat event\n   nor miss any events.\n * If Type is Error: *api.Status is recommended; other types may make sense\n   depending on context.",
-							Ref:         ref("k8s.io/apimachinery/pkg/runtime.Object"),
 						},
 					},
 				},
 				Required: []string{"Type", "Object"},
 			},
 		},
-		Dependencies: []string{
-			"k8s.io/apimachinery/pkg/runtime.Object"},
 	}
 }
 

pkg/collector/collector.go

@@ -3,6 +3,7 @@ package collector
 import (
 	"context"
 	"fmt"
+	"strings"
 	"time"
 
 	log "github.com/sirupsen/logrus"
@@ -182,6 +183,25 @@ type MetricTypeName struct {
 	Metric autoscalingv2.MetricIdentifier
 }
 
+func (m MetricTypeName) String() string {
+	str := fmt.Sprintf("%s/%s", m.Type, m.Metric.Name)
+	if m.Metric.Selector != nil && len(m.Metric.Selector.MatchLabels) > 0 {
+		str += " " + mapToString(m.Metric.Selector.MatchLabels)
+	}
+	return str
+}
+
+func mapToString(m map[string]string) string {
+	str := "{"
+	keyVals := make([]string, 0, len(m))
+	for k, v := range m {
+		keyVals = append(keyVals, fmt.Sprintf("%s=%s", k, v))
+	}
+	str += strings.Join(keyVals, ",")
+	str += "}"
+	return str
+}
+
 type CollectedMetric struct {
 	Type      autoscalingv2.MetricSourceType
 	Namespace string

pkg/collector/collector_test.go

@@ -30,6 +30,88 @@ func (c *mockCollector) Interval() time.Duration {
 	return 0
 }
 
+func TestMetricTypeName_String(t *testing.T) {
+	for _, tc := range []struct {
+		name          string
+		metricType    autoscalingv2.MetricSourceType
+		metricName    string
+		selector      *metav1.LabelSelector
+		expectedStr   string
+		shouldContain []string
+	}{
+		{
+			name:        "nil selector with PodsMetricSourceType",
+			metricType:  autoscalingv2.PodsMetricSourceType,
+			metricName:  "metric-name",
+			selector:    nil,
+			expectedStr: "Pods/metric-name",
+		},
+		{
+			name:        "nil selector with ObjectMetricSourceType",
+			metricType:  autoscalingv2.ObjectMetricSourceType,
+			metricName:  "metric-name",
+			selector:    nil,
+			expectedStr: "Object/metric-name",
+		},
+		{
+			name:        "nil selector with ExternalMetricSourceType",
+			metricType:  autoscalingv2.ExternalMetricSourceType,
+			metricName:  "metric-name",
+			selector:    nil,
+			expectedStr: "External/metric-name",
+		},
+		{
+			name:       "empty selector (non-nil but empty MatchLabels)",
+			metricType: autoscalingv2.ExternalMetricSourceType,
+			metricName: "metric-name",
+			selector: &metav1.LabelSelector{
+				MatchLabels: map[string]string{},
+			},
+			expectedStr: "External/metric-name",
+		},
+		{
+			name:       "selector with single MatchLabel",
+			metricType: autoscalingv2.ExternalMetricSourceType,
+			metricName: "metric-name",
+			selector: &metav1.LabelSelector{
+				MatchLabels: map[string]string{"key": "value"},
+			},
+			shouldContain: []string{"External/metric-name", "key=value"},
+		},
+		{
+			name:       "selector with multiple MatchLabels",
+			metricType: autoscalingv2.ExternalMetricSourceType,
+			metricName: "metric-name",
+			selector: &metav1.LabelSelector{
+				MatchLabels: map[string]string{"key1": "val1", "key2": "val2"},
+			},
+			shouldContain: []string{"External/metric-name", "key1=val1", "key2=val2"},
+		},
+	} {
+		t.Run(tc.name, func(t *testing.T) {
+			mtn := MetricTypeName{
+				Type: tc.metricType,
+				Metric: autoscalingv2.MetricIdentifier{
+					Name:     tc.metricName,
+					Selector: tc.selector,
+				},
+			}
+
+			result := mtn.String()
+
+			if tc.expectedStr != "" {
+				require.Equal(t, tc.expectedStr, result)
+			}
+
+			if len(tc.shouldContain) > 0 {
+				for _, substring := range tc.shouldContain {
+					require.Contains(t, result, substring, "result should contain %q", substring)
+				}
+			}
+		})
+	}
+}
+
 func TestNewCollector(t *testing.T) {
 	for _, tc := range []struct {
 		msg               string

pkg/collector/fake_collector_test.go

@@ -1,9 +1,9 @@
 package collector
 
 import (
+	"context"
 	"time"
 
-	"golang.org/x/net/context"
 	autoscalingv2 "k8s.io/api/autoscaling/v2"
 	"k8s.io/apimachinery/pkg/api/resource"
 	"k8s.io/metrics/pkg/apis/custom_metrics"

pkg/collector/zmon_collector.go

@@ -1,13 +1,13 @@
 package collector
 
 import (
+	"context"
 	"fmt"
 	"strconv"
 	"strings"
 	"time"
 
 	"github.com/zalando-incubator/kube-metrics-adapter/pkg/zmon"
-	"golang.org/x/net/context"
 	autoscalingv2 "k8s.io/api/autoscaling/v2"
 	"k8s.io/apimachinery/pkg/api/resource"
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"

pkg/controller/scheduledscaling/scaler.go

@@ -1,10 +1,10 @@
 package scheduledscaling
 
 import (
+	"context"
 	"fmt"
 	"time"
 
-	"golang.org/x/net/context"
 	autoscalingv1 "k8s.io/api/autoscaling/v1"
 	autoscalingv2 "k8s.io/api/autoscaling/v2"
 	apimeta "k8s.io/apimachinery/pkg/api/meta"

pkg/controller/scheduledscaling/scheduled_scaling.go

@@ -1,6 +1,7 @@
 package scheduledscaling
 
 import (
+	"context"
 	"errors"
 	"fmt"
 	"math"
@@ -10,7 +11,6 @@ import (
 	v1 "github.com/zalando-incubator/kube-metrics-adapter/pkg/apis/zalando.org/v1"
 	zalandov1 "github.com/zalando-incubator/kube-metrics-adapter/pkg/client/clientset/versioned/typed/zalando.org/v1"
 	"github.com/zalando-incubator/kube-metrics-adapter/pkg/recorder"
-	"golang.org/x/net/context"
 	"golang.org/x/sync/errgroup"
 	autoscalingv2 "k8s.io/api/autoscaling/v2"
 	corev1 "k8s.io/api/core/v1"
@@ -57,7 +57,7 @@ var (
 type now func() time.Time
 
 type scalingScheduleStore interface {
-	List() []interface{}
+	List() []any
 }
 
 type Controller struct {
@@ -325,7 +325,7 @@ func highestActiveSchedule(hpa *autoscalingv2.HorizontalPodAutoscaler, activeSch
 			continue
 		}
 
-		target := int64(metric.Object.Target.AverageValue.MilliValue() / 1000)
+		target := float64(metric.Object.Target.AverageValue.MilliValue()) / 1000.0
 		if target == 0 {
 			continue
 		}
@@ -338,10 +338,10 @@ func highestActiveSchedule(hpa *autoscalingv2.HorizontalPodAutoscaler, activeSch
 			value = activeSchedules[scheduleName]
 		}
 
-		expected := int64(math.Ceil(float64(value) / float64(target)))
+		expected := int64(math.Ceil(float64(value) / target))
 		if expected > highestExpected {
 			highestExpected = expected
-			usageRatio = float64(value) / (float64(target) * float64(currentReplicas))
+			usageRatio = float64(value) / (target * float64(currentReplicas))
 			highestObject = metric.Object.DescribedObject
 		}
 	}

pkg/controller/scheduledscaling/scheduled_scaling_test.go

@@ -336,35 +336,42 @@ func TestAdjustScaling(t *testing.T) {
 		msg             string
 		currentReplicas int32
 		desiredReplicas int32
-		targetValue     int64
+		targetValue     string
 		scheduleTarget  int64
 	}{
 		{
 			msg:             "current less than 10%% below desired (target 10000)",
 			currentReplicas: 28, // 7.1% increase to desired
 			desiredReplicas: 31,
-			targetValue:     333, // 10000/333 ~= 31
+			targetValue:     "333", // 10000/333 ~= 31
 			scheduleTarget:  10000,
 		},
 		{
 			msg:             "current less than 10%% below desired",
 			currentReplicas: 95, // 5.3% increase to desired
 			desiredReplicas: 100,
-			targetValue:     10, // 1000/10 = 100
+			targetValue:     "10", // 1000/10 = 100
 			scheduleTarget:  1000,
 		},
 		{
 			msg:             "current more than 10%% below desired, no adjustment",
 			currentReplicas: 90, // 11% increase to desired
 			desiredReplicas: 90,
-			targetValue:     10, // 1000/10 = 100
+			targetValue:     "10", // 1000/10 = 100
 			scheduleTarget:  1000,
 		},
 		{
 			msg:             "invalid HPA should not do any adjustment",
 			currentReplicas: 95,
 			desiredReplicas: 95,
-			targetValue:     0, // this is treated as invalid in the test, thus the HPA is ingored and no adjustment happens.
+			targetValue:     "", // this is treated as invalid in the test, thus the HPA is ingored and no adjustment happens.
+			scheduleTarget:  1000,
+		},
+		{
+			msg:             "handle milivalue as targetValue",
+			currentReplicas: 90, // 5.8% increase to desired
+			desiredReplicas: 96,
+			targetValue:     "10500m", // 1000/10.5 ~= 96
 			scheduleTarget:  1000,
 		},
 	} {
@@ -444,8 +451,11 @@ func TestAdjustScaling(t *testing.T) {
 				},
 			}
 
-			if tc.targetValue != 0 {
-				hpa.Spec.Metrics[0].Object.Target.AverageValue = resource.NewQuantity(tc.targetValue, resource.DecimalSI)
+			if tc.targetValue != "" {
+				quantity, err := resource.ParseQuantity(tc.targetValue)
+				require.NoError(t, err)
+
+				hpa.Spec.Metrics[0].Object.Target.AverageValue = &quantity
 			}
 
 			hpa, err = kubeClient.AutoscalingV2().HorizontalPodAutoscalers("default").Create(context.Background(), hpa, metav1.CreateOptions{})

pkg/provider/hpa.go

@@ -3,6 +3,7 @@ package provider
 import (
 	"context"
 	"errors"
+	"fmt"
 	"reflect"
 	"sync"
 	"time"
@@ -345,7 +346,7 @@ type CollectorScheduler struct {
 	sync.RWMutex
 }
 
-// NewCollectorScheudler initializes a new CollectorScheduler.
+// NewCollectorScheduler initializes a new CollectorScheduler.
 func NewCollectorScheduler(ctx context.Context, metricsc chan<- metricCollection) *CollectorScheduler {
 	return &CollectorScheduler{
 		ctx:        ctx,
@@ -375,14 +376,17 @@ func (t *CollectorScheduler) Add(resourceRef resourceReference, typeName collect
 	collectors[typeName] = cancel
 
 	// start runner for new collector
-	go collectorRunner(ctx, metricCollector, t.metricSink)
+	go collectorRunner(ctx, typeName, metricCollector, t.metricSink)
 }
 
 // collectorRunner runs a collector at the desirec interval. If the passed
 // context is canceled the collection will be stopped.
-func collectorRunner(ctx context.Context, collector collector.Collector, metricsc chan<- metricCollection) {
+func collectorRunner(ctx context.Context, typeName collector.MetricTypeName, collector collector.Collector, metricsc chan<- metricCollection) {
 	for {
 		values, err := collector.GetMetrics(ctx)
+		if err != nil {
+			err = fmt.Errorf("getting metrics for %s failed: %w", typeName, err)
+		}
 
 		metricsc <- metricCollection{
 			Values: values,

pkg/provider/metric_store_test.go

@@ -1,13 +1,13 @@
 package provider
 
 import (
+	"context"
 	"sort"
 	"testing"
 	"time"
 
 	"github.com/stretchr/testify/require"
 	"github.com/zalando-incubator/kube-metrics-adapter/pkg/collector"
-	"golang.org/x/net/context"
 	autoscalingv2 "k8s.io/api/autoscaling/v2"
 	"k8s.io/apimachinery/pkg/api/resource"
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"

pkg/server/start.go

@@ -70,6 +70,8 @@ func NewCommandStartAdapterServer(stopCh <-chan struct{}) *cobra.Command {
 		NakadiTokenName:                   "nakadi",
 		CredentialsDir:                    "/meta/credentials",
 		ExternalRPSMetricName:             "skipper_serve_host_duration_seconds_count",
+		KubeClientQPS:                     0.0, // 0.0 will use the 5.0 default in client-go
+		KubeClientBurst:                   0,   // 0 will use the 10 default in client-go
 	}
 
 	cmd := &cobra.Command{
@@ -153,6 +155,10 @@ func NewCommandStartAdapterServer(stopCh <-chan struct{}) *cobra.Command {
 		"The name of the metric that should be used to query prometheus for RPS per hostname.")
 	flags.BoolVar(&o.ExternalRPSMetrics, "external-rps-metrics", o.ExternalRPSMetrics, ""+
 		"whether to enable external RPS metric collector or not")
+	flags.Float64Var(&o.KubeClientQPS, "kube-client-qps", o.KubeClientQPS, ""+
+		"maximum queries per second (QPS) to the Kubernetes API server (increase for large clusters), defaults to 5")
+	flags.IntVar(&o.KubeClientBurst, "kube-client-burst", o.KubeClientBurst, ""+
+		"maximum burst for throttle to the Kubernetes API server (increase for large clusters, defaults to 10)")
 	return cmd
 }
 
@@ -199,6 +205,8 @@ func (o AdapterServerOptions) RunCustomMetricsAdapterServer(stopCh <-chan struct
 	}()
 
 	clientConfig.Timeout = defaultClientGOTimeout
+	clientConfig.QPS = float32(o.KubeClientQPS)
+	clientConfig.Burst = o.KubeClientBurst
 
 	client, err := kubernetes.NewForConfig(clientConfig)
 	if err != nil {
@@ -546,4 +554,8 @@ type AdapterServerOptions struct {
 	ExternalRPSMetrics bool
 	// Name of the Prometheus metric that stores RPS by hostname for external RPS metrics.
 	ExternalRPSMetricName string
+	// KubeClientQPS configures the maximum QPS to the Kubernetes API server
+	KubeClientQPS float64
+	// KubeClientBurst configures the maximum burst for throttle to the Kubernetes API server
+	KubeClientBurst int
 }