PHP:

$instance = json_decode(file_get_contents('http://169.254.169.254/latest/dynamic/instance-identity/document));
$id = $instance['instanceId'];

编辑@John

在Ubuntu上你可以:

sudo apt-get install cloud-utils

然后你就可以:

EC2_INSTANCE_ID=$(ec2metadata --instance-id)

你可以通过这种方式获取大多数与实例相关的元数据:

ec2metadata --help
Syntax: /usr/bin/ec2metadata [options]

Query and display EC2 metadata.

If no options are provided, all options will be displayed

Options:
    -h --help               show this help

    --kernel-id             display the kernel id
    --ramdisk-id            display the ramdisk id
    --reservation-id        display the reservation id

    --ami-id                display the ami id
    --ami-launch-index      display the ami launch index
    --ami-manifest-path     display the ami manifest path
    --ancestor-ami-ids      display the ami ancestor id
    --product-codes         display the ami associated product codes
    --availability-zone     display the ami placement zone

    --instance-id           display the instance id
    --instance-type         display the instance type

    --local-hostname        display the local hostname
    --public-hostname       display the public hostname

    --local-ipv4            display the local ipv4 ip address
    --public-ipv4           display the public ipv4 ip address

    --block-device-mapping  display the block device id
    --security-groups       display the security groups

    --mac                   display the instance mac address
    --profile               display the instance profile
    --instance-action       display the instance-action

    --public-keys           display the openssh public keys
    --user-data             display the user data (not actually metadata)

对于Windows实例:

(wget http://169.254.169.254/latest/meta-data/instance-id).Content

or

(ConvertFrom-Json (wget http://169.254.169.254/latest/dynamic/instance-identity/document).Content).instanceId

一个更现代的解决方案。

在Amazon Linux中已经安装了ec2-metadata命令。

从终点站

ec2-metadata -help

会给你可用的选项吗

ec2-metadata -i

将返回

instance-id: yourid

简单的一行

猫/ sys /设备/虚拟/ dmi / id / board_asset_tag

or

Curl_cli -s http://169.254.169.254/latest/meta-data/instance-id

来源:https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/identify_ec2_instances.html

如果你想在python中获取所有实例id列表，下面是代码:

import boto3

ec2=boto3.client('ec2')
instance_information = ec2.describe_instances()

for reservation in instance_information['Reservations']:
   for instance in reservation['Instances']:
      print(instance['InstanceId'])