k8s volumeMounts 功能 使用时subPath 参数

写pod的yaml文件时，如果想使用云存储，则volumeMounts这个property，
mountPath 为container内部目录
而subPath 虽然紧跟mountpath， 最容易被误解为本地路径，其实其为远端云存储上的子路径

所以进入pod内部看磁盘情况，显示
bbuser@stream-notifications-baseline-learn-tomcat-7cd697-2xwp7:~$ df -v
Filesystem 1K-blocks Used Available Use% Mounted on
10.114.70.2:/learn_perf_bbcontent_1/instance/stream-notifications-baseline
570422592 19338048 551084544 4% /mnt/bbcontent
- name: learn image: ${LEARN_DOCKER_IMAGE} imagePullPolicy: IfNotPresent
resources: requests: cpu: ${LEARN_CPU_REQUEST} memory: ${LEARN_MEM_REQUEST}
limits: cpu: ${LEARN_CPU_LIMITS} memory: ${LEARN_MEM_LIMITS} command: -
${BB_USER_HOME}/bin/launcher.sh env: - name: DEV_FEATURES valueFrom:
configMapKeyRef: name: ${INSTANCE_NAME}-learn-config key: DEV_FEATURES
volumeMounts: - name: bbcontent **mountPath: /mnt/bbcontent subPath:
instance/${INSTANCE_NAME} ** volumes: - name: bbcontent persistentVolumeClaim:
claimName: learn-deployments-share
volume 和name（container的名字）是统一层级。

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