event mixed sample

    {
        "counter_name": "instance:Popular_2",
        "user_id": "3d45398dda6c43f3b97dece2b1a05314",
        "resource_id": "5b0baa8d-c650-4962-bd8c-885472bd498b",
        "timestamp": "2015-08-31T19:01:34",
        "recorded_at": "2015-08-31T19:01:34.990000",
        "message_id": "b3242352-5012-11e5-827a-0025904bfa7a",
        "source": "openstack",
        "counter_unit": "instance",
        "counter_volume": 1,
        "project_id": "dde5a7e510d4401882816c43e97b3127",
        "resource_metadata": {
            "ephemeral_gb": "0",
            "flavor.vcpus": "2",
            "flavor.ephemeral": "0",
            "display_name": "Instance-resize",
            "flavor.ram": "2048",
            "user_metadata.public_port_id": "1e7168e5-d4c0-4264-9dbe-16496a08f9ba",
            "status": "active",
            "user_metadata.private_port_id": "f716ada2-0f81-45ec-bc40-d0d0d6b17a40",
            "flavor.name": "Popular_2",
            "disk_gb": "20",
            "kernel_id": "None",
            "image.id": "78e740da-4193-4f88-806d-e55c66e40837",
            "flavor.id": "f14c0d83-8824-4916-8d24-4cd969c3c2b1",
            "host": "69e12ff60cf76844fbd0b07ebdc1790aa368b2c6fd7cbd49936c1ae8",
            "OS-EXT-AZ.availability_zone": "nova",
            "image.name": "Ubuntu 14.04",
            "image_ref_url": "***************************************************",
            "image.links": "*****************************************************",
            "flavor.disk": "20",
            "root_gb": "20",
            "name": "instance-0000179f",
            "memory_mb": "2048",
            "instance_type": "f14c0d83-8824-4916-8d24-4cd969c3c2b1",
            "vcpus": "2",
            "image_ref": "78e740da-4193-4f88-806d-e55c66e40837",
            "flavor.links": "***************************************************",
            "ramdisk_id": "None"
        },
        "counter_type": "gauge"
    },
    {
        "counter_name": "instance:Popular_2",
        "user_id": "3d45398dda6c43f3b97dece2b1a05314",
        "resource_id": "5b0baa8d-c650-4962-bd8c-885472bd498b",
        "timestamp": "2015-08-31T19:01:00.071000",
        "recorded_at": "2015-08-31T19:01:00.144000",
        "message_id": "9e574e04-5012-11e5-abb2-0cc47a0b5168",
        "source": "openstack",
        "counter_unit": "instance",
        "counter_volume": 1,
        "project_id": "dde5a7e510d4401882816c43e97b3127",
        "resource_metadata": {
            "image_meta.os_require_quiesce": "yes",
            "state_description": "",
            "image_meta.base_image_ref": "78e740da-4193-4f88-806d-e55c66e40837",
            "event_type": "compute.instance.exists",
            "availability_zone": "nova",
            "terminated_at": "",
            "ephemeral_gb": "0",
            "instance_type_id": "58",
            "image_meta.hw_qemu_guest_agent": "yes",
            "deleted_at": "",
            "reservation_id": "r-g8v3etkw",
            "memory_mb": "2048",
            "display_name": "Instance-resize",
            "hostname": "instance-resize",
            "state": "active",
            "image_ref_url": "********************************************",
            "progress": "",
            "image_meta.hw_disk_bus": "scsi",
            "launched_at": "2015-08-31T18:51:19.000000",
            "user_metadata.public_port_id": "1e7168e5-d4c0-4264-9dbe-16496a08f9ba",
            "node": "********************************************",
            "user_metadata.private_port_id": "f716ada2-0f81-45ec-bc40-d0d0d6b17a40",
            "access_ip_v6": "None",
            "disk_gb": "20",
            "access_ip_v4": "None",
            "kernel_id": "",
            "image_meta.disk_format": "raw",
            "image_meta.container_format": "bare",
            "user_id": "3d45398dda6c43f3b97dece2b1a05314",
            "image_meta.min_disk": "20",
            "cell_name": "",
            "audit_period_beginning": "2015-08-31 18:00:00",
            "root_gb": "20",
            "tenant_id": "dde5a7e510d4401882816c43e97b3127",
            "created_at": "2015-08-31 18:39:41+00:00",
            "image_meta.min_ram": "0",
            "host": "********************************************",
            "instance_id": "5b0baa8d-c650-4962-bd8c-885472bd498b",
            "instance_type": "Popular_2",
            "vcpus": "2",
            "architecture": "None",
            "audit_period_ending": "2015-08-31 19:00:00",
            "image_meta.hw_scsi_model": "virtio-scsi",
            "os_type": "None",
            "ramdisk_id": "",
            "instance_flavor_id": "f14c0d83-8824-4916-8d24-4cd969c3c2b1"
        },
        "counter_type": "gauge"
    },