CODEWITHSUNDEEP
pythonamazon-web-servicesamazon-ec2boto3
sandy
sandy

Reputation: 1

How to find the ec2 instance id by passing volume id using boto

I want to pass the volume id as a parameter which then returns the instance id in python

Upvotes: 0

Views: 1113

Answers (2)

John Rotenstein
John Rotenstein

Reputation: 270224

As @Rajesh pointed out, an easier way is to use DescribeVolumes, which returns Attachment information:

import boto3

ec2_client = boto3.client('ec2', region_name='ap-southeast-2')

response = ec2_client.describe_volumes(VolumeIds=['vol-deadbeef'])

print(response['Volumes'][0]['Attachments'][0]['InstanceId'])

This code assumes that the instance is the first attachment on the volume (since EBS volumes can only be attached to one instance).

Upvotes: 0

John Rotenstein
John Rotenstein

Reputation: 270224

You will need to call describe_instances().

You can either filter the results yourself in Python, or pass Filters for block-device-mapping.volume-id.

import boto3

ec2_client = boto3.client('ec2', region_name='ap-southeast-2')

response = ec2_client.describe_instances(Filters=[{'Name':'block-device-mapping.volume-id','Values':['vol-deadbeef']}])

instance_id = response['Reservations'][0]['Instances'][0]['InstanceId']

print(instance_id)

A volume can only be attached to one instance at a time, so this code assumes only one instance is returned.

Upvotes: 1

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