{{/*
Copyright 2018 AT&T Intellectual Property.  All other rights reserved.

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.
*/}}

{{- $envAll := . }}
---
apiVersion: extensions/v1beta1
kind: Deployment
metadata:
  name: coredns
  labels:
    {{ .Values.service.name }}: enabled
    kubernetes.io/name: "CoreDNS"
spec:
  replicas: {{ .Values.pod.replicas.coredns }}
  strategy:
    type: RollingUpdate
    rollingUpdate:
      maxUnavailable: 1
  selector:
    matchLabels:
      {{ .Values.service.name }}: enabled
  template:
    metadata:
      labels:
{{ tuple $envAll "kubernetes" "coredns" | include "helm-toolkit.snippets.kubernetes_metadata_labels" | indent 8 }}
        {{ .Values.service.name }}: enabled
      annotations:
        configmap-bin-hash: {{ tuple "configmap-bin.yaml" . | include "helm-toolkit.utils.hash" }}
        configmap-etc-hash: {{ tuple "configmap-etc.yaml" . | include "helm-toolkit.utils.hash" }}
    spec:
      serviceAccountName: coredns
      tolerations:
        - key: "CriticalAddonsOnly"
          operator: "Exists"
      nodeSelector:
        {{ .Values.labels.coredns.node_selector_key }}: {{ .Values.labels.coredns.node_selector_value }}
      affinity:
        podAntiAffinity:
          preferredDuringSchedulingIgnoredDuringExecution:
          - weight: 100
            podAffinityTerm:
              labelSelector:
                matchExpressions:
                - key: {{ .Values.service.name }}
                  operator: In
                  values:
                  - enabled
              topologyKey: kubernetes.io/hostname
      containers:
      - name: coredns
        image: {{ .Values.images.tags.coredns | quote }}
        imagePullPolicy: {{ .Values.images.pull_policy | quote }}
{{ tuple $envAll $envAll.Values.pod.resources.coredns | include "helm-toolkit.snippets.kubernetes_resources" | indent 8 }}
        args: [ "-conf", "/etc/coredns/Corefile" ]
        volumeMounts:
        - name: config-volume
          mountPath: /etc/coredns
        - name: scripts
          mountPath: /tmp/bin
        ports:
        - containerPort: 53
          name: dns
          protocol: UDP
        - containerPort: 53
          name: dns-tcp
          protocol: TCP
        readinessProbe:
          exec:
            command:
              - /tmp/bin/probe.sh
          initialDelaySeconds: 2
          timeoutSeconds: 5
          successThreshold: 1
        livenessProbe:
          exec:
            command:
              - /tmp/bin/probe.sh
          initialDelaySeconds: 10
          timeoutSeconds: 5
          successThreshold: 1
          failureThreshold: 3
      dnsPolicy: Default
      volumes:
        - name: config-volume
          configMap:
            name: {{ .Values.service.name }}-etc
            items:
            - key: Corefile
              path: Corefile
        - name: scripts
          configMap:
            name: {{ .Values.service.name }}-bin
            defaultMode: 0555