# Copyright 2021 The 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: deployment-splitter
  namespace: cluster-controller
  labels:
    cluster.example.dev/release: devel
spec:
  replicas: 1
  selector:
    matchLabels:
      app: deployment-splitter
  template:
    metadata:
      labels:
        app: deployment-splitter
        cluster.example.dev/release: devel
    spec:
      # To avoid node becoming SPOF, spread our replicas to different nodes.
      affinity:
        podAntiAffinity:
          preferredDuringSchedulingIgnoredDuringExecution:
          - podAffinityTerm:
              labelSelector:
                matchLabels:
                  app: deployment-splitter
              topologyKey: kubernetes.io/hostname
            weight: 100

      serviceAccountName: controller
      containers:
      - name: deployment-splitter
        # This is the Go import path for the binary that is containerized
        # and substituted here.
        image: ko://github.com/imjasonh/cluster-controller/cmd/deployment-splitter
        resources:
          requests:
            cpu: 100m
            memory: 100Mi
          limits:
            cpu: 1000m
            memory: 1000Mi
        ports:
        - name: metrics
          containerPort: 9090
        env:
        - name: SYSTEM_NAMESPACE
          valueFrom:
            fieldRef:
              fieldPath: metadata.namespace
        - name: CONFIG_LOGGING_NAME
          value: config-logging
        - name: CONFIG_OBSERVABILITY_NAME
          value: config-observability
        - name: METRICS_DOMAIN
          value: example.dev/cluster

        securityContext:
          allowPrivilegeEscalation: false
          readOnlyRootFilesystem: true
          runAsNonRoot: true
          capabilities:
            drop:
            - all
