feature: add memory option for container

[skoowoo]

Signed-off-by: skoo87 [email protected]

1.Describe what this PR did

include memory, memory-swap and memory-swappiness.

2.Does this pull request fix one issue?

3.Describe how you did it

4.Describe how to verify it

5.Special notes for reviews

[codecov-io]

Codecov Report

Merging #511 into master will decrease coverage by 0.2%.
The diff coverage is 0%.

@@            Coverage Diff             @@
##           master     #511      +/-   ##
==========================================
- Coverage   17.93%   17.72%   -0.21%     
==========================================
  Files          35       36       +1     
  Lines        1801     1822      +21     
==========================================
  Hits          323      323              
- Misses       1443     1464      +21     
  Partials       35       35

Impacted Files	Coverage Δ
daemon/mgr/spec.go	0% <ø> (ø)	⬆️
daemon/mgr/spec_cgroup_memory.go	0% <0%> (ø)

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[allencloud]

Could you help to add HostConfig in the response of API GET /containers/{id}/json? @skoo87
Since I got none about memory limit info in this API: https://github.com/alibaba/pouch/blob/master/apis/server/container_bridge.go#L253-L258:

root@ubuntu:~/go/src/github.com/alibaba/pouch# pouch run -d -m 50m registry.hub.docker.com/library/busybox:latest sleep 100000
dd61cc118217a6d48102a83d3ab8683e09f7e6990722728efbe366b315882792
root@ubuntu:~/go/src/github.com/alibaba/pouch# pouch inspect dd61cc118217a6d48102a83d3ab8683e09f7e6990722728efbe366b315882792
{
  "Args": null,
  "Config": {
    "Cmd": [
      "sleep",
      "100000"
    ],
    "Entrypoint": null,
    "Env": [
      "PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin"
    ],
    "Image": "registry.hub.docker.com/library/busybox:latest",
    "OnBuild": null,
    "Shell": null
  },
  "Created": "2018-01-08 07:02:10",
  "Id": "dd61cc118217a6d48102a83d3ab8683e09f7e6990722728efbe366b315882792",
  "Image": "registry.hub.docker.com/library/busybox:latest",
  "Mounts": null,
  "Name": "dd61cc",
  "State": {
    "Pid": 3328,
    "StartedAt": "2018-01-08 07:02:10",
    "Status": "running"
  }
}

[skoowoo]

updated @allencloud

[allencloud]

LGTM, tested on my local machine.Memory info is located in root@ubuntu:/sys/fs/cgroup/memory/default/183f84796b39898ed2a4fe7887a902332bf3a010ac65482749bae0d31f54f0f8# cat memory.limit_in_bytes 52428800 and hostconfig:

  "HostConfig": {
    "Runtime": "runc",
    "BlkioDeviceReadBps": null,
    "BlkioDeviceReadIOps": null,
    "BlkioDeviceWriteBps": null,
    "BlkioDeviceWriteIOps": null,
    "BlkioWeightDevice": null,
    "DeviceCgroupRules": null,
    "Devices": null,
    "Memory": 52428800,
    "MemorySwappiness": -1,
    "Ulimits": null