# Copyright 2018 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
  namespace: knative-serving
  labels:
    serving.knative.dev/release: "v0.19.0"
spec:
  replicas: 1
  selector:
    matchLabels:
      app: autoscaler
  template:
    metadata:
      annotations:
        cluster-autoscaler.kubernetes.io/safe-to-evict: "false"
      labels:
        app: autoscaler
        serving.knative.dev/release: "v0.19.0"
    spec:
      # To avoid node becoming SPOF, spread our replicas to different nodes.
      affinity:
        podAntiAffinity:
          preferredDuringSchedulingIgnoredDuringExecution:
            - podAffinityTerm:
                labelSelector:
                  matchLabels:
                    app: autoscaler
                topologyKey: kubernetes.io/hostname
              weight: 100
      serviceAccountName: controller
      containers:
        - name: autoscaler
          # 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@sha256:db6ceff2aab47083b36c0e24ab0c0eea6f070bc8e7c82dae828778c6714fe1fb
          resources:
            requests:
              cpu: 30m
              memory: 40Mi
            limits:
              cpu: 300m
              memory: 400Mi
          env:
            - name: POD_NAME
              valueFrom:
                fieldRef:
                  fieldPath: metadata.name
            - name: POD_IP
              valueFrom:
                fieldRef:
                  fieldPath: status.podIP
            - 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
            readOnlyRootFilesystem: true
            runAsNonRoot: true
            capabilities:
              drop:
                - all
          ports:
            - name: metrics
              containerPort: 9090
            - name: profiling
              containerPort: 8008
            - name: websocket
              containerPort: 8080
          readinessProbe:
            httpGet:
              port: 8080
              httpHeaders:
                - name: k-kubelet-probe
                  value: "autoscaler"
          livenessProbe:
            httpGet:
              port: 8080
              httpHeaders:
                - name: k-kubelet-probe
                  value: "autoscaler"
            failureThreshold: 6