k8s - check behavior of configMap

config.properties

TEST=123
FOO=bar
hoge=FUGA

kustomization.yaml

apiVersion: kustomize.config.k8s.io/v1beta1
kind: Kustomization

resources:
- statefulset.yaml

configMapGenerator:
- name: config-env
  envs:
  - config.properties
- name: my-test-env
  literals:	
  - BAZ=baz
  - qux=QUX

statefulset.yaml

apiVersion: v1
kind: Service
metadata:
  name: ubuntu
  labels:
    app: ubuntu
spec:
  clusterIP: None
  selector:
    app: ubuntu
---
apiVersion: apps/v1
kind: StatefulSet
metadata:
  name: ubuntu
spec:
  selector:
    matchLabels:
      app: ubuntu
  serviceName: ubuntu
  replicas: 1
  template:
    metadata:
      labels:
        app: ubuntu
    spec:
      containers:
      - name: ubuntu
        image: ubuntu:latest
        command:
        - sleep
        - infinity
        env:
        - name: FOO
          value: overwriteme
        envFrom:
        - configMapRef:
            name: config-env
        - configMapRef:
            name: my-test-env
        securityContext:
          allowPrivilegeEscalation: false
          readOnlyRootFilesystem: true
          runAsNonRoot: true
          runAsUser: 1000
          capabilities:
            drop: ["ALL"]
          seccompProfile:
            type: "RuntimeDefault"