cinder/api-ref/source/v3/samples/volume-initialize-connection-request.json

{
    "os-initialize_connection": {
        "connector": {
            "platform":"x86_64",
            "host": "node2",
            "do_local_attach": false,
            "ip": "192.168.13.101",
            "os_type": "linux2",
            "multipath": false,
            "initiator": "iqn.1994-05.com.redhat:d16cbb5d31e5"
        }
    }
}