Docker is not freeing up space on devicemapper devices
Issue
- After some time of running normal container operations on the node, the free space value in the devicemapper based Docker pool is lower than expected.
Environment
- Red Hat Enterprise Linux 7.x
- docker < 1.12.6-48.git0fdc778
- docker-latest < 1.13.1-21.1.gitcd75c68
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