Find an EC2 instance by its IP in boto3

Question

I want to find an EC2 instance using its public and private IPs. In CLI it can be done through:

aws ec2 describe-instances --filter Name=ip-address,Values=IP_1,..IP_N

However, I am looking for a way to do this using boto3 in Python:

import boto3
ec2 = boto3.resource("ec2")
for instance in ec2.instances.all():
    # if instance.ip['private'] == '1.2.3.4': # Something like this.

Answer 1

One better option is to use Filters on the ec2 client describe_instances method. Variety of filters available is listed here

This is the reference for ec2 boto3

Sample code that I tried

ec2_client = self.get_ec2_client(aws_credentials)
ec2_client.describe_instances(Filters=[{
                'Name': 'private-ip-address',
                'Values': [
                    '10.273.117.10',
                ]
            }
            ])

 def get_ec2_client(self, aws_credentials):
        client = boto3.client('ec2', aws_access_key_id=aws_credentials["aws_access_key_id"],
                              aws_secret_access_key=aws_credentials["aws_secret_access_id"])
        return client