k8s/airflow/chart/airflow/templates/webserver/webserver-deployment.yaml

---
apiVersion: apps/v1
kind: Deployment
metadata:
  name: {{ .Release.Name }}-web
  labels:
    app: {{ include "airflow.labels.app" . }}
    component: web
    name: {{ .Release.Name }}
spec:
  replicas: {{ .Values.web.replicas }}
  strategy:
    type: RollingUpdate
    rollingUpdate:
      ## multiple web pods can safely run concurrently
      maxSurge: 25%
      maxUnavailable: 0
  selector:
    matchLabels:
      app: {{ include "airflow.labels.app" . }}
      component: web
      name: {{ .Release.Name }}
  template:
    metadata:
      annotations:
        cluster-autoscaler.kubernetes.io/safe-to-evict: "true"
      labels:
        app: {{ include "airflow.labels.app" . }}
        component: web
        name: {{ .Release.Name }}
    spec:
      restartPolicy: Always
      terminationGracePeriodSeconds: 60
      serviceAccountName: {{ include "airflow.serviceAccountName" . }}
      initContainers:
        {{- include "airflow.init_container.check_db" . | indent 8 }}
        {{- include "airflow.init_container.wait_for_db_migrations" . | indent 8 }}
      containers:
        - name: airflow-web
          {{- include "airflow.image" . | indent 10 }}
          ports:
            - name: web
              containerPort: 8080
              protocol: TCP
          envFrom:
            {{- include "airflow.envFrom" . | indent 12 }}
          env:
            {{- include "airflow.env" . | indent 12 }}
            - name: _AIRFLOW_WWW_USER_CREATE
              value: 'true'
          command:
            {{- include "airflow.command" . | indent 12 }}
          args:
            - "webserver"
          livenessProbe: &probes
            initialDelaySeconds: 30
            periodSeconds: 10
            timeoutSeconds: 5
            failureThreshold: 6
            httpGet:
              scheme: HTTP
              path: /health
              port: web
          readinessProbe: *probes
          volumeMounts:
            {{- include "airflow.volumeMounts" . | indent 12 }}
            - name: webserver-config
              mountPath: /opt/airflow/webserver_config.py
              subPath: webserver_config.py
              readOnly: true
        {{ if .Values.metrics.exporter.enabled }}
        - name: stackdriver-exporter
          image: {{ .Values.metrics.image }}
          ports:
          - name: profiler
            containerPort: 6060
          command:
          - /monitor
          - --stackdriver-prefix=custom.googleapis.com
          - --source=airflow:http://localhost:8080/admin/metrics
          - --pod-id=$(POD_NAME)
          - --namespace-id=$(POD_NAMESPACE)
          - --monitored-resource-types=k8s
          env:
          - name: POD_NAME
            valueFrom:
              fieldRef:
                fieldPath: metadata.name
          - name: POD_NAMESPACE
            valueFrom:
              fieldRef:
                fieldPath: metadata.namespace
        {{ end }}
      volumes:
        {{- include "airflow.volumes" . | indent 8 }}
        - name: webserver-config
          secret:
            secretName: {{ .Release.Name }}-webserver-config
            defaultMode: 0644