Is this a request for help? (If yes, you should use our troubleshooting guide and community support channels, see http://kubernetes.io/docs/troubleshooting/.):

There is no metrics in volume manager and controllers (i.e. attach/detach and provision controllers). It is hard to get latency and stats.
What keywords did you search in Kubernetes issues before filing this one? (If you have found any duplicates, you should instead reply there.):
metrics, volume

Is this a BUG REPORT or FEATURE REQUEST? (choose one):
FEATURE REQUEST

Kubernetes version (use kubectl version):

Environment:

• Cloud provider or hardware configuration:
• OS (e.g. from /etc/os-release):
• Kernel (e.g. uname -a):
• Install tools:
• Others:

What happened:

What you expected to happen:

How to reproduce it (as minimally and precisely as possible):

Anything else do we need to know: