Question

CA UIM probe使用AWS提供的API监视EC2实例。

我可以访问此AWS API来监视EC2实例吗？

Answer 1

当然，您可以使用AWS REST API（可通过SDKs或CLI使用）。要获取实例指标，您需要使用EC2和CloudWatch API。以下是AWS CLI的示例，这些示例针对您提供的文档的"AWS related QOS Metrics"中的指标：

实例状态：

aws ec2 describe-instances --instance-ids i-999f9f99f999f99f9 --query "Reservations[*].Instances[*].[State]"

[
    [
        [
            {
                "Code": 16,
                "Name": "running"
            }
        ]
    ]
]

CPU使用率（％）：

aws cloudwatch get-metric-statistics --namespace AWS/EC2 --metric-name CPUUtilization  --period 60 --statistics Average --dimensions Name=InstanceId,Value=i-999f9f99f999f99f9 --start-time 2018-12-07T00:00:00 --end-time 2018-12-08T00:00:00

{
    "Label": "CPUUtilization",
    "Datapoints": [
        {
            "Timestamp": "2018-12-07T02:40:00Z",
            "Average": 0.0,
            "Unit": "Percent"
        },
        {
            "Timestamp": "2018-12-07T13:35:00Z",
            "Average": 1.0,
            "Unit": "Percent"
        },
        …
    ]
}

磁盘读取操作：

aws cloudwatch get-metric-statistics --namespace AWS/EC2 --metric-name EBSReadOps  --period 60 --statistics Average --dimensions Name=InstanceId,Value=i-999f9f99f999f99f9 --start-time 2018-12-07T00:00:00 --end-time 2018-12-08T00:00:00
aws cloudwatch get-metric-statistics --namespace AWS/EC2 --metric-name DiskReadOps  --period 60 --statistics Average --dimensions Name=InstanceId,Value=i-999f9f99f999f99f9 --start-time 2018-12-07T00:00:00 --end-time 2018-12-08T00:00:00

{
    "Label": "EBSReadOps",
    "Datapoints": [
        {
            "Timestamp": "2018-12-07T00:25:00Z",
            "Average": 10.0,
            "Unit": "Count"
        },
        {
            "Timestamp": "2018-12-07T20:10:00Z",
            "Average": 11.5,
            "Unit": "Count"
        },
        …
    ]
}

磁盘写入操作

aws cloudwatch get-metric-statistics --namespace AWS/EC2 --metric-name EBSWriteOps  --period 60 --statistics Average --dimensions Name=InstanceId,Value=i-999f9f99f999f99f9 --start-time 2018-12-07T00:00:00 --end-time 2018-12-08T00:00:00
aws cloudwatch get-metric-statistics --namespace AWS/EC2 --metric-name DiskWriteOps  --period 60 --statistics Average --dimensions Name=InstanceId,Value=i-999f9f99f999f99f9 --start-time 2018-12-07T00:00:00 --end-time 2018-12-08T00:00:00

{
    "Label": "EBSWriteOps",
    "Datapoints": [
        {
            "Timestamp": "2018-12-07T00:25:00Z",
            "Average": 1229.3,
            "Unit": "Count"
        },
        {
            "Timestamp": "2018-12-07T20:10:00Z",
            "Average": 496.6,
            "Unit": "Count"
        },
        …
    ]
}

磁盘读取字节

aws cloudwatch get-metric-statistics --namespace AWS/EC2 --metric-name EBSReadBytes  --period 60 --statistics Average --dimensions Name=InstanceId,Value=i-999f9f99f999f99f9 --start-time 2018-12-07T00:00:00 --end-time 2018-12-08T00:00:00
aws cloudwatch get-metric-statistics --namespace AWS/EC2 --metric-name DiskReadBytes  --period 60 --statistics Average --dimensions Name=InstanceId,Value=i-999f9f99f999f99f9 --start-time 2018-12-07T00:00:00 --end-time 2018-12-08T00:00:00

{
    "Label": "EBSReadBytes",
    "Datapoints": [
        {
            "Timestamp": "2018-12-07T00:25:00Z",
            "Average": 665.6,
            "Unit": "Count"
        },
        {
            "Timestamp": "2018-12-07T20:10:00Z",
            "Average": 200.3,
            "Unit": "Count"
        },
        …
    ]
}

磁盘写入字节

aws cloudwatch get-metric-statistics --namespace AWS/EC2 --metric-name EBSWriteBytes  --period 60 --statistics Average --dimensions Name=InstanceId,Value=i-999f9f99f999f99f9 --start-time 2018-12-07T00:00:00 --end-time 2018-12-08T00:00:00
aws cloudwatch get-metric-statistics --namespace AWS/EC2 --metric-name DiskWriteBytes  --period 60 --statistics Average --dimensions Name=InstanceId,Value=i-999f9f99f999f99f9 --start-time 2018-12-07T00:00:00 --end-time 2018-12-08T00:00:00

{
    "Label": "EBSWriteBytes",
    "Datapoints": [
        {
            "Timestamp": "2018-12-07T00:25:00Z",
            "Average": 7026688.0,
            "Unit": "Count"
        },
        {
            "Timestamp": "2018-12-07T20:10:00Z",
            "Average": 7586713.6,
            "Unit": "Count"
        },
        …
    ]
}

以字节为单位的网络

aws cloudwatch get-metric-statistics --namespace AWS/EC2 --metric-name NetworkIn  --period 60 --statistics Average --dimensions Name=InstanceId,Value=i-999f9f99f999f99f9 --start-time 2018-12-07T00:00:00 --end-time 2018-12-08T00:00:00

{
    "Label": "NetworkIn",
    "Datapoints": [
        {
            "Timestamp": "2018-12-07T16:10:00Z",
            "Average": 24489418.6,
            "Unit": "Bytes"
        },
        {
            "Timestamp": "2018-12-07T13:50:00Z",
            "Average": 21305249.0,
            "Unit": "Bytes"
        },
        …
    ]
}

网络输出字节

aws cloudwatch get-metric-statistics --namespace AWS/EC2 --metric-name NetworkOut  --period 60 --statistics Average --dimensions Name=InstanceId,Value=i-999f9f99f999f99f9 --start-time 2018-12-07T00:00:00 --end-time 2018-12-08T00:00:00

{
    "Label": "NetworkOut",
    "Datapoints": [
        {
            "Timestamp": "2018-12-07T16:10:00Z",
            "Average": 25363795.4,
            "Unit": "Bytes"
        },
        {
            "Timestamp": "2018-12-07T13:50:00Z",
            "Average": 22128487.0,
            "Unit": "Bytes"
        },
        …
    ]
}

可用指标的完整列表可以在here中找到。子页面包含特定服务的可用指标。 Here是EC2的页面。

使用语言的SDK时，您将获得几乎相同的数据。如您所见，CloudWatch只是返回您查询的带有时间戳记的指标的列表。

监控EC2实例的API

1 个答案: