chart/templates/workers/worker-kedaautoscaler.yaml

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################################
## Airflow Worker KEDA Scaler
#################################
{{- if and .Values.workers.keda.enabled (or (contains "CeleryExecutor" .Values.executor) (contains "CeleryKubernetesExecutor" .Values.executor) ) }}
apiVersion: keda.sh/v1alpha1
kind: ScaledObject
metadata:
  name: {{ include "airflow.fullname" . }}-worker
  labels:
    tier: airflow
    component: worker-horizontalpodautoscaler
    release: {{ .Release.Name }}
    chart: "{{ .Chart.Name }}-{{ .Chart.Version }}"
    heritage: {{ .Release.Service }}
    deploymentName: {{ .Release.Name }}-worker
    {{- if or (.Values.labels) (.Values.workers.labels) }}
      {{- mustMerge .Values.workers.labels .Values.labels | toYaml | nindent 4 }}
    {{- end }}
spec:
  scaleTargetRef:
    kind: {{ ternary "StatefulSet" "Deployment" .Values.workers.persistence.enabled }}
    name: {{ include "airflow.fullname" . }}-worker
    envSourceContainerName: worker
  pollingInterval:  {{ .Values.workers.keda.pollingInterval }}
  cooldownPeriod: {{ .Values.workers.keda.cooldownPeriod }}
  minReplicaCount: {{ .Values.workers.keda.minReplicaCount }}
  maxReplicaCount: {{ .Values.workers.keda.maxReplicaCount }}
  {{- if .Values.workers.keda.advanced }}
  advanced: {{- toYaml .Values.workers.keda.advanced | nindent 4 }}
  {{- end }}
  triggers:
    {{- if eq .Values.data.metadataConnection.protocol "mysql" }}
    - type: "mysql"
      metadata:
        queryValue: "1"
        connectionStringFromEnv: KEDA_DB_CONN
        query: {{ tpl .Values.workers.keda.query . | quote }}
    {{- else }}
    - type: "postgresql"
      metadata:
        targetQueryValue: "1"
        {{- if and .Values.pgbouncer.enabled (not .Values.workers.keda.usePgbouncer) }}
        connectionFromEnv: KEDA_DB_CONN
        {{- else }}
        connectionFromEnv: AIRFLOW_CONN_AIRFLOW_DB
        {{- end }}
        query: {{ tpl .Values.workers.keda.query . | quote }}
    {{- end }}
{{- end }}