make memory units compatible with native docker cli

[smothiki]

Signed-off-by: sivaram mothiki smothiki@engineyard.com

There is no hard enforcement of syntax on specifying memory from docker side . I think docker-py should return an Error only if docker engine errors out and accept any syntax.

$ sudo docker run -d --name serame -m 30MB busybox sleep 30
$ docker inspect serame|grep Memory
        "Memory": 31457280,
        "MemorySwap": 0,
$ sudo docker run -d --name serame -m 30M busybox sleep 30
$ docker inspect serame|grep Memory
        "Memory": 31457280,
        "MemorySwap": 0,
$ sudo docker run -d --name serame -m 30Mb busybox sleep 30
$ docker inspect serame|grep Memory
        "Memory": 31457280,
        "MemorySwap": 0,
$ sudo docker run -d --name serame -m 30mb busybox sleep 30
$ docker inspect serame|grep Memory
        "Memory": 31457280,
        "MemorySwap": 0,
$ sudo docker run -d --name serame -m 30MK busybox sleep 30
FATA[0000] invalid size: '30MK'

[mboersma]

+1

[shin-]

Thank you for the contribution! Could you add unit tests to validate that this will behave as expected?

[smothiki]

Apologies for multiple commits. Ignored checking flake8 every time

[smothiki]

@shin- I have added integration tests. Let me know if you want more test cases

[shin-]

Thanks!