kubespray/roles/kubernetes-apps/ansible/templates/dns-autoscaler.yml.j2

---
# Copyright 2016 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.

apiVersion: apps/v1
kind: Deployment
metadata:
  name: dns-autoscaler{{ coredns_ordinal_suffix }}
  namespace: kube-system
  labels:
    k8s-app: dns-autoscaler{{ coredns_ordinal_suffix }}
    addonmanager.kubernetes.io/mode: Reconcile
spec:
  selector:
    matchLabels:
      k8s-app: dns-autoscaler{{ coredns_ordinal_suffix }}
  template:
    metadata:
      labels:
        k8s-app: dns-autoscaler{{ coredns_ordinal_suffix }}
      annotations:
        seccomp.security.alpha.kubernetes.io/pod: 'runtime/default'
    spec:
      priorityClassName: system-cluster-critical
      securityContext:
        supplementalGroups: [ 65534 ]
        fsGroup: 65534
      nodeSelector:
        kubernetes.io/os: linux
      tolerations:
        - effect: NoSchedule
          key: node-role.kubernetes.io/master
        - effect: NoSchedule
          key: node-role.kubernetes.io/control-plane
      affinity:
        podAntiAffinity:
          requiredDuringSchedulingIgnoredDuringExecution:
          - topologyKey: "kubernetes.io/hostname"
            labelSelector:
              matchLabels:
                k8s-app: dns-autoscaler{{ coredns_ordinal_suffix }}
        nodeAffinity:
          preferredDuringSchedulingIgnoredDuringExecution:
          - weight: 100
            preference:
              matchExpressions:
{% if kube_version is version('v1.20.0', '<') %}
              - key: node-role.kubernetes.io/master
{% else %}
              - key: node-role.kubernetes.io/control-plane
{% endif %}
                operator: In
                values:
                - ""
      containers:
      - name: autoscaler
        image: "{{ dnsautoscaler_image_repo }}:{{ dnsautoscaler_image_tag }}"
        resources:
          requests:
            cpu: {{ dns_autoscaler_cpu_requests }}
            memory: {{ dns_autoscaler_memory_requests }}
        readinessProbe:
          httpGet:
            path: /healthz
            port: 8080
            scheme: HTTP
        command:
        - /cluster-proportional-autoscaler
        - --namespace=kube-system
        - --default-params={"linear":{"preventSinglePointFailure":{{ dns_prevent_single_point_failure }},"coresPerReplica":{{ dns_cores_per_replica }},"nodesPerReplica":{{ dns_nodes_per_replica }},"min":{{ dns_min_replicas }}}}
        - --logtostderr=true
        - --v=2
        - --configmap=dns-autoscaler{{ coredns_ordinal_suffix }}
        - --target=Deployment/coredns{{ coredns_ordinal_suffix }}
      serviceAccountName: dns-autoscaler