kubernetes: Cgroup 'cpu.cfs_quota_us' error on container creation when CPU limit is low

After upgrading my environment from Kubernetes 1.1.8 to Kubernetes 1.2.0, I see pods creation failing with the following resource limits set:

        resources:
          limits:
            cpu: 5m
            memory: 25Mi

Translated to Docker container info:

1.1.8	1.2.0
“Memory”: 26214400,	“Memory”: 26214400,
“MemoryReservation”: 0,	“MemoryReservation”: 0,
“CpuShares”: 5,	“CpuShares”: 5,
“CpuPeriod”: 0,	“CpuPeriod”: 100000,
“CpuQuota”: 0,	“CpuQuota”: 500,

The error message is:

Cannot start container <sha>: [9] System error: write /sys/fs/cgroup/cpu,cpuacct/system.slice/docker-<sha>.scope/cpu.cfs_quota_us: invalid argument

I can reproduce this by creating containers manually:

$ docker run --rm --cpu-shares=5 --cpu-quota=0 --cpu-period=0 tianon/true
[exit code 0]
$ docker run --rm --cpu-shares=5 --cpu-quota=500 --cpu-period=100000 tianon/true
docker: Error response from daemon: Cannot start container <sha>: [9] System error: write /sys/fs/cgroup/cpu,cpuacct/docker/<sha>/cpu.cfs_quota_us: invalid argument.
[exit code 125]

Kubernetes should check that the defined CPU restrictions are valid before attempting to create containers.