configmap and secrets

configmap.yaml

apiVersion: v1
kind: ConfigMap
metadata:
  name: event-exporter-cfg
  namespace: {{ .Release.Namespace }}
data:
  config.yaml.erb: |
    route:
      match:
        - receiver: "dump"
    receivers:
      - name: "dump"
        elasticsearch:
          hosts:
          - https://{{ .Release.Name }}-es-http:9200
          index: kube-events
          username: elastic
          password: <%= ENV['ES_PASSWORD'] %>

deploy.yaml

apiVersion: apps/v1
kind: Deployment
metadata:
  name: event-exporter
spec:
  replicas: 1
    spec:
      serviceAccountName: event-exporter
      initContainers:
      - name: config
        image: "ruby:2.7-slim"
        command: ['sh', '-c', 'erb /tmpl/config.yaml.erb > /data/config.yaml']
        volumeMounts:
          - name: cfgtmpl
            mountPath: /tmpl
          - name: configdir
            mountPath: /data
        env:
          - name: ES_PASSWORD
            valueFrom:
              secretKeyRef:
                name: quickstart-es-elastic-user
                key: elastic
      containers:
        - name: event-exporter
          image: opsgenie/kubernetes-event-exporter:0.7
          imagePullPolicy: IfNotPresent
          args:
            - -conf=/data/config.yaml
          volumeMounts:
            - mountPath: /data
              name: configdir
      volumes:
        - name: cfgtmpl
          configMap:
            name: event-exporter-cfg
        - name: configdir
          emptyDir: {}