检索指标数据（GetMetricData）

GetMetricData 是通过编程方式检索经典指标数据点的主要 API。该 API 支持在单次调用中执行批量查询、数学表达式运算及多项查询。

基本用法

检索单条指标：

aws cloudwatch get-metric-data \
  --metric-data-queries '[
    {
      "Id": "cpu",
      "MetricStat": {
        "Metric": {
          "Namespace": "AWS/EC2",
          "MetricName": "CPUUtilization",
          "Dimensions": [{"Name": "InstanceId", "Value": "i-1234567890abcdef0"}]
        },
        "Period": 300,
        "Stat": "Average"
      }
    }
  ]' \
  --start-time $(date -u -d '1 hour ago' +%Y-%m-%dT%H:%M:%S) \
  --end-time $(date -u +%Y-%m-%dT%H:%M:%S) \
  --output json

批量查询

单次调用可一次性检索多条指标（最多支持 500 条查询）：

aws cloudwatch get-metric-data \
  --metric-data-queries '[
    {"Id": "cpu", "MetricStat": {"Metric": {"Namespace": "AWS/EC2", "MetricName": "CPUUtilization", "Dimensions": [{"Name": "InstanceId", "Value": "i-abc"}]}, "Period": 300, "Stat": "Average"}},
    {"Id": "mem", "MetricStat": {"Metric": {"Namespace": "CWAgent", "MetricName": "mem_used_percent", "Dimensions": [{"Name": "InstanceId", "Value": "i-abc"}]}, "Period": 300, "Stat": "Average"}}
  ]' \
  --start-time 2024-01-01T00:00:00 \
  --end-time 2024-01-01T01:00:00

数学表达式

通过算术运算组合多条指标：

[
  {"Id": "rx", "MetricStat": {"Metric": {"Namespace": "AWS/EC2", "MetricName": "NetworkIn", "Dimensions": [{"Name": "InstanceId", "Value": "i-abc"}]}, "Period": 300, "Stat": "Sum"}},
  {"Id": "tx", "MetricStat": {"Metric": {"Namespace": "AWS/EC2", "MetricName": "NetworkOut", "Dimensions": [{"Name": "InstanceId", "Value": "i-abc"}]}, "Period": 300, "Stat": "Sum"}},
  {"Id": "total", "Expression": "rx + tx", "Label": "TotalNetwork"}
]

GetMetricData 与 GetMetricStatistics 对比

定价

通过 GetMetricData 查询指标，每 1000 条指标收费 0.01 美元。