scheduler-deployment.yaml

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################################
## Airflow Scheduler Deployment/StatefulSet
#################################
{{- if .Values.scheduler.enabled }}
# Are we using a local executor?
{{- $local := contains "Local" .Values.executor }}
# Is persistence enabled on the _workers_?
# This is important because in $local mode, the scheduler assumes the role of the worker
{{- $persistence := .Values.workers.persistence.enabled }}
# If we're using a StatefulSet
{{- $stateful := and $local $persistence }}
# We can skip DAGs mounts on scheduler if dagProcessor is enabled, except with $local mode
{{- $localOrDagProcessorDisabled := or (not .Values.dagProcessor.enabled) $local }}
# If we're using elasticsearch logging
{{- $elasticsearch := .Values.elasticsearch.enabled }}
{{- $nodeSelector := or .Values.scheduler.nodeSelector .Values.nodeSelector }}
{{- $affinity := or .Values.scheduler.affinity .Values.affinity }}
{{- $tolerations := or .Values.scheduler.tolerations .Values.tolerations }}
{{- $topologySpreadConstraints := or .Values.scheduler.topologySpreadConstraints .Values.topologySpreadConstraints }}
{{- $revisionHistoryLimit := or .Values.scheduler.revisionHistoryLimit .Values.revisionHistoryLimit }}
{{- $securityContext := include "airflowPodSecurityContext" (list . .Values.scheduler) }}
{{- $containerSecurityContext := include "containerSecurityContext" (list . .Values.scheduler) }}
{{- $containerSecurityContextWaitForMigrations := include "containerSecurityContext" (list . .Values.scheduler.waitForMigrations) }}
{{- $containerSecurityContextLogGroomerSidecar := include "containerSecurityContext" (list . .Values.scheduler.logGroomerSidecar) }}
{{- $containerLifecycleHooks := or .Values.scheduler.containerLifecycleHooks .Values.containerLifecycleHooks }}
{{- $containerLifecycleHooksLogGroomerSidecar := or .Values.scheduler.logGroomerSidecar.containerLifecycleHooks .Values.containerLifecycleHooks }}
apiVersion: apps/v1
kind: {{ if $stateful }}StatefulSet{{ else }}Deployment{{ end }}
metadata:
  name: {{ include "airflow.fullname" . }}-scheduler
  labels:
    tier: airflow
    component: scheduler
    release: {{ .Release.Name }}
    chart: "{{ .Chart.Name }}-{{ .Chart.Version }}"
    heritage: {{ .Release.Service }}
    executor: {{ .Values.executor }}
    {{- with .Values.labels }}
      {{- toYaml . | nindent 4 }}
    {{- end }}
  {{- if .Values.scheduler.annotations }}
  annotations: {{- toYaml .Values.scheduler.annotations | nindent 4 }}
  {{- end }}
spec:
  {{- if $stateful }}
  serviceName: {{ include "airflow.fullname" . }}-scheduler
  {{- end }}
  replicas: {{ .Values.scheduler.replicas }}
  {{- if $revisionHistoryLimit }}
  revisionHistoryLimit: {{ $revisionHistoryLimit }}
  {{- end }}
  {{- if and $stateful .Values.scheduler.updateStrategy }}
  updateStrategy: {{- toYaml .Values.scheduler.updateStrategy | nindent 4 }}
  {{- end }}
  {{- if and $stateful .Values.workers.persistence.persistentVolumeClaimRetentionPolicy }}
  persistentVolumeClaimRetentionPolicy: {{- toYaml .Values.workers.persistence.persistentVolumeClaimRetentionPolicy  | nindent 4 }}
  {{- end }}
  {{- if and (not $stateful) .Values.scheduler.strategy }}
  strategy: {{- toYaml .Values.scheduler.strategy | nindent 4 }}
  {{- end }}
  selector:
    matchLabels:
      tier: airflow
      component: scheduler
      release: {{ .Release.Name }}
  template:
    metadata:
      labels:
        tier: airflow
        component: scheduler
        release: {{ .Release.Name }}
        {{- if or (.Values.labels) (.Values.scheduler.labels) }}
          {{- mustMerge .Values.scheduler.labels .Values.labels | toYaml | nindent 8 }}
        {{- end }}
      annotations:
        checksum/metadata-secret: {{ include (print $.Template.BasePath "/secrets/metadata-connection-secret.yaml") . | sha256sum }}
        checksum/result-backend-secret: {{ include (print $.Template.BasePath "/secrets/result-backend-connection-secret.yaml") . | sha256sum }}
        checksum/pgbouncer-config-secret: {{ include (print $.Template.BasePath "/secrets/pgbouncer-config-secret.yaml") . | sha256sum }}
        checksum/airflow-config: {{ include (print $.Template.BasePath "/configmaps/configmap.yaml") . | sha256sum }}
        checksum/extra-configmaps: {{ include (print $.Template.BasePath "/configmaps/extra-configmaps.yaml") . | sha256sum }}
        checksum/extra-secrets: {{ include (print $.Template.BasePath "/secrets/extra-secrets.yaml") . | sha256sum }}
        {{- if .Values.scheduler.safeToEvict }}
        cluster-autoscaler.kubernetes.io/safe-to-evict: "true"
        {{- end }}
        {{- if .Values.airflowPodAnnotations }}
          {{- toYaml .Values.airflowPodAnnotations | nindent 8 }}
        {{- end }}
        {{- if .Values.scheduler.podAnnotations }}
          {{- toYaml .Values.scheduler.podAnnotations | nindent 8 }}
        {{- end }}
    spec:
      {{- if .Values.scheduler.priorityClassName }}
      priorityClassName: {{ .Values.scheduler.priorityClassName }}
      {{- end }}
      {{- if .Values.schedulerName }}
      schedulerName: {{ .Values.schedulerName }}
      {{- end }}
      nodeSelector: {{- toYaml $nodeSelector | nindent 8 }}
      affinity:
        {{- if $affinity }}
          {{- toYaml $affinity | nindent 8 }}
        {{- else }}
        podAntiAffinity:
          preferredDuringSchedulingIgnoredDuringExecution:
          - podAffinityTerm:
              labelSelector:
                matchLabels:
                  component: scheduler
              topologyKey: kubernetes.io/hostname
            weight: 100
        {{- end }}
      tolerations: {{- toYaml $tolerations | nindent 8 }}
      topologySpreadConstraints: {{- toYaml $topologySpreadConstraints | nindent 8 }}
      restartPolicy: Always
      terminationGracePeriodSeconds: {{ .Values.scheduler.terminationGracePeriodSeconds }}
      serviceAccountName: {{ include "scheduler.serviceAccountName" . }}
      securityContext: {{ $securityContext | nindent 8 }}
      {{- if or .Values.registry.secretName .Values.registry.connection }}
      imagePullSecrets:
        - name: {{ template "registry_secret" . }}
      {{- end }}
      {{- if .Values.scheduler.hostAliases }}
      hostAliases: {{- toYaml .Values.scheduler.hostAliases | nindent 8 }}
      {{- end }}
      initContainers:
        {{- if .Values.scheduler.waitForMigrations.enabled }}
        - name: wait-for-airflow-migrations
          resources: {{- toYaml .Values.scheduler.resources | nindent 12 }}
          image: {{ template "airflow_image_for_migrations" . }}
          imagePullPolicy: {{ .Values.images.airflow.pullPolicy }}
          securityContext: {{ $containerSecurityContextWaitForMigrations | nindent 12 }}
          volumeMounts:
            {{- include "airflow_config_mount" . | nindent 12 }}
            {{- if .Values.volumeMounts }}
              {{- toYaml .Values.volumeMounts | nindent 12 }}
            {{- end }}
            {{- if .Values.scheduler.extraVolumeMounts }}
              {{- tpl (toYaml .Values.scheduler.extraVolumeMounts) . | nindent 12 }}
            {{- end }}
            {{- if or .Values.webserver.webserverConfig .Values.webserver.webserverConfigConfigMapName }}
              {{- include "airflow_webserver_config_mount" . | nindent 12 }}
            {{- end }}
          args: {{- include "wait-for-migrations-command" . | indent 10 }}
          envFrom: {{- include "custom_airflow_environment_from" . | default "\n  []" | indent 10 }}
          env:
            {{- include "custom_airflow_environment" . | indent 10 }}
            {{- include "standard_airflow_environment" . | indent 10 }}
            {{- if .Values.scheduler.waitForMigrations.env }}
              {{- tpl (toYaml .Values.scheduler.waitForMigrations.env) $ | nindent 12 }}
            {{- end }}
        {{- end }}
        {{- if and $localOrDagProcessorDisabled .Values.dags.gitSync.enabled }}
          {{- include "git_sync_container" (dict "Values" .Values "is_init" "true" "Template" .Template) | nindent 8 }}
        {{- end }}
        {{- if .Values.scheduler.extraInitContainers }}
          {{- tpl (toYaml .Values.scheduler.extraInitContainers) . | nindent 8 }}
        {{- end }}
      containers:
        # Always run the main scheduler container.
        - name: scheduler
          image: {{ template "airflow_image" . }}
          imagePullPolicy: {{ .Values.images.airflow.pullPolicy }}
          securityContext: {{ $containerSecurityContext | nindent 12 }}
          {{- if $containerLifecycleHooks }}
          lifecycle: {{- tpl (toYaml $containerLifecycleHooks) . | nindent 12 }}
          {{- end }}
          {{- if .Values.scheduler.command }}
          command: {{ tpl (toYaml .Values.scheduler.command) . | nindent 12 }}
          {{- end }}
          {{- if .Values.scheduler.args }}
          args: {{ tpl (toYaml .Values.scheduler.args) . | nindent 12 }}
          {{- end }}
          envFrom: {{- include "custom_airflow_environment_from" . | default "\n  []" | indent 10 }}
          env:
            {{- include "custom_airflow_environment" . | indent 10 }}
            {{- include "standard_airflow_environment" . | indent 10 }}
            {{- include "container_extra_envs" (list . .Values.scheduler.env) | indent 10 }}
          livenessProbe:
            initialDelaySeconds: {{ .Values.scheduler.livenessProbe.initialDelaySeconds }}
            timeoutSeconds: {{ .Values.scheduler.livenessProbe.timeoutSeconds }}
            failureThreshold: {{ .Values.scheduler.livenessProbe.failureThreshold }}
            periodSeconds: {{ .Values.scheduler.livenessProbe.periodSeconds }}
            exec:
              command:
                {{- if .Values.scheduler.livenessProbe.command }}
                  {{- toYaml .Values.scheduler.livenessProbe.command  | nindent 16 }}
                {{- else }}
                  {{- include "scheduler_liveness_check_command" . | indent 14 }}
                {{- end }}
          startupProbe:
            timeoutSeconds: {{ .Values.scheduler.startupProbe.timeoutSeconds }}
            failureThreshold: {{ .Values.scheduler.startupProbe.failureThreshold }}
            periodSeconds: {{ .Values.scheduler.startupProbe.periodSeconds }}
            exec:
              command:
                {{- if .Values.scheduler.startupProbe.command }}
                  {{- toYaml .Values.scheduler.startupProbe.command  | nindent 16 }}
                {{- else }}
                  {{- include "scheduler_startup_check_command" . | indent 14 }}
                {{- end }}
          {{- if and $local (not $elasticsearch) }}
          # Serve logs if we're in local mode and we don't have elasticsearch enabled.
          ports:
            - name: worker-logs
              containerPort: {{ .Values.ports.workerLogs }}
          {{- end }}
          resources: {{- toYaml .Values.scheduler.resources | nindent 12 }}
          volumeMounts:
            {{- if semverCompare ">=1.10.12" .Values.airflowVersion }}
            - name: config
              mountPath: {{ include "airflow_pod_template_file" . }}/pod_template_file.yaml
              subPath: pod_template_file.yaml
              readOnly: true
            {{- end }}
            - name: logs
              mountPath: {{ template "airflow_logs" . }}
            {{- include "airflow_config_mount" . | nindent 12 }}
            {{- if or .Values.webserver.webserverConfig .Values.webserver.webserverConfigConfigMapName }}
              {{- include "airflow_webserver_config_mount" . | nindent 12 }}
            {{- end }}
            {{- if and $localOrDagProcessorDisabled (or .Values.dags.persistence.enabled .Values.dags.gitSync.enabled) }}
              {{- include "airflow_dags_mount" . | nindent 12 }}
            {{- end }}
            {{- if .Values.volumeMounts }}
              {{- toYaml .Values.volumeMounts | nindent 12 }}
            {{- end }}
            {{- if .Values.scheduler.extraVolumeMounts }}
              {{- tpl (toYaml .Values.scheduler.extraVolumeMounts) . | nindent 12 }}
            {{- end }}
        {{- if and $localOrDagProcessorDisabled .Values.dags.gitSync.enabled }}
          {{- include "git_sync_container" . | indent 8 }}
        {{- end }}
        {{- if .Values.scheduler.logGroomerSidecar.enabled }}
        - name: scheduler-log-groomer
          resources: {{- toYaml .Values.scheduler.logGroomerSidecar.resources | nindent 12 }}
          image: {{ template "airflow_image" . }}
          imagePullPolicy: {{ .Values.images.airflow.pullPolicy }}
          securityContext: {{ $containerSecurityContextLogGroomerSidecar | nindent 12 }}
          {{- if $containerLifecycleHooksLogGroomerSidecar  }}
          lifecycle: {{- tpl (toYaml $containerLifecycleHooksLogGroomerSidecar) . | nindent 12 }}
          {{- end }}
          {{- if .Values.scheduler.logGroomerSidecar.command }}
          command: {{ tpl (toYaml .Values.scheduler.logGroomerSidecar.command) . | nindent 12 }}
          {{- end }}
          {{- if .Values.scheduler.logGroomerSidecar.args }}
          args: {{- tpl (toYaml .Values.scheduler.logGroomerSidecar.args) . | nindent 12 }}
          {{- end }}
          {{- if .Values.scheduler.logGroomerSidecar.retentionDays }}
          env:
            - name: AIRFLOW__LOG_RETENTION_DAYS
              value: "{{ .Values.scheduler.logGroomerSidecar.retentionDays }}"
            - name: AIRFLOW_HOME
              value: "{{ .Values.airflowHome }}"
          {{- end }}
          volumeMounts:
            - name: logs
              mountPath: {{ template "airflow_logs" . }}
            {{- if .Values.volumeMounts }}
              {{- toYaml .Values.volumeMounts | nindent 12 }}
            {{- end }}
            {{- if .Values.scheduler.extraVolumeMounts }}
              {{- tpl (toYaml .Values.scheduler.extraVolumeMounts) . | nindent 12 }}
            {{- end }}
            {{- if or .Values.webserver.webserverConfig .Values.webserver.webserverConfigConfigMapName }}
              {{- include "airflow_webserver_config_mount" . | nindent 12 }}
            {{- end }}
          {{- end }}
        {{- if .Values.scheduler.extraContainers }}
          {{- tpl (toYaml .Values.scheduler.extraContainers) . | nindent 8 }}
        {{- end }}
      volumes:
        - name: config
          configMap:
            name: {{ template "airflow_config" . }}
        {{- if or .Values.webserver.webserverConfig .Values.webserver.webserverConfigConfigMapName }}
        - name: webserver-config
          configMap:
            name: {{ template "airflow_webserver_config_configmap_name" . }}
        {{- end }}
        {{- if $localOrDagProcessorDisabled }}
        {{- if .Values.dags.persistence.enabled }}
        - name: dags
          persistentVolumeClaim:
            claimName: {{ template "airflow_dags_volume_claim" . }}
        {{- else if .Values.dags.gitSync.enabled }}
        - name: dags
          emptyDir: {{- toYaml (default (dict) .Values.dags.gitSync.emptyDirConfig) | nindent 12 }}
        {{- if or .Values.dags.gitSync.sshKeySecret .Values.dags.gitSync.sshKey}}
          {{- include "git_sync_ssh_key_volume" . | indent 8 }}
        {{- end }}
        {{- end }}
        {{- end }}
        {{- if .Values.volumes }}
          {{- toYaml .Values.volumes | nindent 8 }}
        {{- end }}
        {{- if .Values.scheduler.extraVolumes }}
          {{- tpl (toYaml .Values.scheduler.extraVolumes) . | nindent 8 }}
        {{- end }}
  {{- if .Values.logs.persistence.enabled }}
        - name: logs
          persistentVolumeClaim:
            claimName: {{ template "airflow_logs_volume_claim" . }}
  {{- else if not $stateful }}
        - name: logs
          emptyDir: {{- toYaml (default (dict) .Values.logs.emptyDirConfig) | nindent 12 }}
  {{- else }}
  volumeClaimTemplates:
    - apiVersion: v1
      kind: PersistentVolumeClaim
      metadata:
        name: logs
        {{- if .Values.workers.persistence.annotations }}
        annotations: {{- toYaml .Values.workers.persistence.annotations | nindent 10 }}
        {{- end }}
      spec:
      {{- if .Values.workers.persistence.storageClassName }}
        storageClassName: {{ tpl .Values.workers.persistence.storageClassName . | quote }}
      {{- end }}
        accessModes: ["ReadWriteOnce"]
        resources:
          requests:
            storage: {{ .Values.workers.persistence.size }}
  {{- end }}
  {{- end }}