Memory usage of Docker containers

You can get this from docker stats e.g:

$ docker stats --no-streamCONTAINER           CPU %               MEM USAGE / LIMIT   MEM %               NET I/O             BLOCK I/O             PIDS6b5c0fcfa7d4        0.13%               2.203 MiB / 4 MiB   55.08%              5.223 kB / 648 B    102.4 kB / 876.5 kB   3

Update: See @Adrian Mouat's answer below as docker now supports docker stats!

There isn't a way to do this that's built into docker in the current version. Future versions will support this via an api or plugin.

• https://github.com/dotcloud/docker/issues/36

It does look like there's an lxc project that you should be able to use to track CPU and Memory.

• https://github.com/Soulou/acadock-live-lxc

Also, you can read resource metrics directly from cgroups.See example below (I am running on Debian Jessie and docker 1.2)

> docker ps -qafa03c363af5> ls /sys/fs/cgroup/memory/system.slice/ | grep docker-afa03c363af5docker-afa03c363af54815d721d938e01fe4cb2debc4f6c15ebff1851e20f6cde3ae0e.scope> cd docker-afa03c363af54815d721d938e01fe4cb2debc4f6c15ebff1851e20f6cde3ae0e.scope> cat memory.usage_in_bytes4358144> cat memory.limit_in_bytes1073741824