./data/metric
fileStatus: 200
[
"cpu.busy",
"cpu.cnt",
"cpu.guest",
"cpu.idle",
"cpu.iowait",
"cpu.irq",
"cpu.nice",
"cpu.softirq",
"cpu.steal",
"cpu.system",
"cpu.user",
"df.bytes.free",
"df.bytes.free.percent"
....
]