Install the manifest based on the version specified in knativeserving spec

cmd/operator/kodata/knative-serving/0.15.0/3-serving-hpa.yaml

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+# Copyright 2019 The Knative 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
+#
+#     https://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.
+
+apiVersion: rbac.authorization.k8s.io/v1
+kind: ClusterRole
+metadata:
+  name: custom-metrics-server-resources
+  labels:
+    serving.knative.dev/release: "v0.15.0"
+    autoscaling.knative.dev/metric-provider: custom-metrics
+rules:
+- apiGroups: ["custom.metrics.k8s.io"]
+  resources: ["*"]
+  verbs: ["*"]
+
+---
+# Copyright 2019 The Knative 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
+#
+#     https://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.
+
+apiVersion: rbac.authorization.k8s.io/v1
+kind: ClusterRoleBinding
+metadata:
+  name: custom-metrics:system:auth-delegator
+  labels:
+    serving.knative.dev/release: "v0.15.0"
+    autoscaling.knative.dev/metric-provider: custom-metrics
+roleRef:
+  apiGroup: rbac.authorization.k8s.io
+  kind: ClusterRole
+  name: system:auth-delegator
+subjects:
+- kind: ServiceAccount
+  name: controller
+  namespace: knative-serving
+
+---
+# Copyright 2019 The Knative 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
+#
+#     https://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.
+
+apiVersion: rbac.authorization.k8s.io/v1
+kind: ClusterRoleBinding
+metadata:
+  name: hpa-controller-custom-metrics
+  labels:
+    serving.knative.dev/release: "v0.15.0"
+    autoscaling.knative.dev/metric-provider: custom-metrics
+roleRef:
+  apiGroup: rbac.authorization.k8s.io
+  kind: ClusterRole
+  name: custom-metrics-server-resources
+subjects:
+- kind: ServiceAccount
+  name: horizontal-pod-autoscaler
+  namespace: kube-system
+
+---
+# Copyright 2019 The Knative 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
+#
+#     https://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.
+
+apiVersion: rbac.authorization.k8s.io/v1
+kind: RoleBinding
+metadata:
+  name: custom-metrics-auth-reader
+  namespace: kube-system
+  labels:
+    serving.knative.dev/release: "v0.15.0"
+    autoscaling.knative.dev/metric-provider: custom-metrics
+roleRef:
+  apiGroup: rbac.authorization.k8s.io
+  kind: Role
+  name: extension-apiserver-authentication-reader
+subjects:
+- kind: ServiceAccount
+  name: controller
+  namespace: knative-serving
+
+---
+# Copyright 2019 The Knative 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
+#
+#     https://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.
+
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: autoscaler-hpa
+  namespace: knative-serving
+  labels:
+    serving.knative.dev/release: "v0.15.0"
+    autoscaling.knative.dev/autoscaler-provider: hpa
+spec:
+  selector:
+    matchLabels:
+      app: autoscaler-hpa
+  template:
+    metadata:
+      annotations:
+        cluster-autoscaler.kubernetes.io/safe-to-evict: "true"
+      labels:
+        app: autoscaler-hpa
+        serving.knative.dev/release: "v0.15.0"
+    spec:
+      serviceAccountName: controller
+      containers:
+      - name: autoscaler-hpa
+        # This is the Go import path for the binary that is containerized
+        # and substituted here.
+        image: gcr.io/knative-releases/knative.dev/serving/cmd/autoscaler-hpa@sha256:807a4ccd295b2ac1a29b5f60b869ff60930d4ebfdc9421b2c041dd17f0c1279c
+        resources:
+          requests:
+            cpu: 30m
+            memory: 40Mi
+          limits:
+            cpu: 300m
+            memory: 400Mi
+        env:
+        - name: SYSTEM_NAMESPACE
+          valueFrom:
+            fieldRef:
+              fieldPath: metadata.namespace
+        - name: CONFIG_LOGGING_NAME
+          value: config-logging
+        - name: CONFIG_OBSERVABILITY_NAME
+          value: config-observability
+        - # TODO(https://github.com/knative/pkg/pull/953): Remove stackdriver specific config
+          name: METRICS_DOMAIN
+          value: knative.dev/serving
+        securityContext:
+          allowPrivilegeEscalation: false
+        ports:
+        - name: metrics
+          containerPort: 9090
+        - name: profiling
+          containerPort: 8008
+---
+apiVersion: v1
+kind: Service
+metadata:
+  labels:
+    app: autoscaler-hpa
+    serving.knative.dev/release: "v0.15.0"
+    autoscaling.knative.dev/autoscaler-provider: hpa
+  name: autoscaler-hpa
+  namespace: knative-serving
+spec:
+  ports:
+  - # Define metrics and profiling for them to be accessible within service meshes.
+    name: http-metrics
+    port: 9090
+    targetPort: 9090
+  - name: http-profiling
+    port: 8008
+    targetPort: 8008
+  selector:
+    app: autoscaler-hpa
+
+---
+# Copyright 2019 The Knative 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
+#
+#     https://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.
+
+apiVersion: apiregistration.k8s.io/v1beta1
+kind: APIService
+metadata:
+  name: v1beta1.custom.metrics.k8s.io
+  labels:
+    serving.knative.dev/release: "v0.15.0"
+    autoscaling.knative.dev/metric-provider: custom-metrics
+spec:
+  service:
+    name: autoscaler
+    namespace: knative-serving
+  group: custom.metrics.k8s.io
+  version: v1beta1
+  insecureSkipTLSVerify: true
+  groupPriorityMinimum: 100
+  versionPriority: 100
+
+---