[root@hdss7-200 ~]# vim /data/k8s-yaml/base_resource/volume/cm-pod-01.yaml
apiVersion: v1
kind: Pod
metadata: 
  name: slb-configmap-env
  namespace: app
  labels:
    tier: configmap
    role: slb
spec:
  containers:
  - name: slb-container
    image: harbor.od.com/public/nginx:v1.14
    env:
    - name: LISTEN_PORT
      valueFrom:
        configMapKeyRef:
          name: slb-vhosts-config
          key: listen-port
    - name: SERVER_NAME
      valueFrom:
        configMapKeyRef:
          name: slb-vhosts-config
          key: server-name

[root@hdss7-21 ~]# kubectl apply -f http://k8s-yaml.od.com/base_resource/volume/cm-pod-01.yaml
pod/slb-configmap-env created
[root@hdss7-21 ~]# kubectl get pod slb-configmap-env -n app 
NAME                READY   STATUS    RESTARTS   AGE
slb-configmap-env   1/1     Running   0          14s
[root@hdss7-21 ~]# kubectl exec slb-configmap-env -n app -- /bin/sh -c "echo \$LISTEN_PORT ; echo \$SERVER_NAME"
8080
www.maxiaoke.com