如何从ec2实例中获取实例ID？ [英] How to get the instance id from within an ec2 instance?

问题描述

如何从ec2实例中查找ec2实例的实例ID ？

How can I find out the instance id of an ec2 instance from within the ec2 instance?

推荐答案

请参阅 EC2文档。

运行：

wget -q -O - http://169.254.169.254/latest/meta-data/instance-id

如果您需要从脚本中以编程方式访问实例ID，

If you need programatic access to the instance ID from within a script,

die() { status=$1; shift; echo "FATAL: $*"; exit $status; }
EC2_INSTANCE_ID="`wget -q -O - http://169.254.169.254/latest/meta-data/instance-id || die \"wget instance-id has failed: $?\"`"

更高级用法的示例（检索实例ID以及可用性区域和区域，等等）

An example of a more advanced use (retrieve instance ID as well as availability zone and region, etc.):

EC2_INSTANCE_ID="`wget -q -O - http://169.254.169.254/latest/meta-data/instance-id || die \"wget instance-id has failed: $?\"`"
test -n "$EC2_INSTANCE_ID" || die 'cannot obtain instance-id'
EC2_AVAIL_ZONE="`wget -q -O - http://169.254.169.254/latest/meta-data/placement/availability-zone || die \"wget availability-zone has failed: $?\"`"
test -n "$EC2_AVAIL_ZONE" || die 'cannot obtain availability-zone'
EC2_REGION="`echo \"$EC2_AVAIL_ZONE\" | sed -e 's:\([0-9][0-9]*\)[a-z]*\$:\\1:'`"

您也可以使用 curl 而不是 wget ，具体取决于您的平台上安装了什么。

You may also use curl instead of wget, depending on what is installed on your platform.

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