有些容器启动时需要通过volume，把配置文件塞进容器的肚子里。本例子中，要把一个README.txt文件添加到容器中。
ConfigMap配置
apiVersion: v1
kind: ConfigMap
metadata:
name: playground-configmap
namespace: "playground"
data:
readme: |
这是readme文件，请勿删除。
Pod配置
apiVersion: v1
kind: Pod
metadata:
name: pod
namespace: "playground"
labels:
app: "playground"
spec:
volumes:
- name: configmap-volume
configMap:
name: playground-configmap
items:
- key: "readme"
path: "README.txt"
containers:
- name: "app"
image: "10.211.55.6:5000/yingzhuo/playground:latest"
imagePullPolicy: Always
ports:
- containerPort: 8080
volumeMounts:
- name: configmap-volume
mountPath: "/config"
