http://www.flexthinker.com/2015/02/monitoring-docker-containers-with-cadvisor-from-marathon/

cadvisor.json

{
  "container": {
    "type": "DOCKER",
    "docker": {
      "image": "google/cadvisor:latest"
    },
    "volumes": [
      {
        "containerPath": "/rootfs",
        "hostPath": "/",
        "mode": "RO"
      },
      {
        "containerPath": "/var/run",
        "hostPath": "/var/run",
        "mode": "RW"
      },
      {
        "containerPath": "/sys",
        "hostPath": "/sys",
        "mode": "RO"
      },
      {
        "containerPath": "/var/lib/docker",
        "hostPath": "/var/lib/docker",
        "mode": "RO"
      },
      {
        "containerPath": "/cgroup",
        "hostPath": "/cgroup",
        "mode": "RO"
      }
    ],
    "network": "BRIDGE",
    "portMappings": [
      { "containerPort": "0.0.0.0:8080", "hostPort": "0.0.0.0:8080", "protocol": "tcp" }
    ]
  },
  "id": "cadvisor",
  "instances": 1,
  "cpus": 0.5,
  "mem": 512,
  "constraints": [
    [
      "hostname",
      "UNIQUE"
    ]
  ],
  "ports": [
    8081
  ]
}