CODEWITHSUNDEEP
amazon-web-servicesamazon-ec2aws-cli
Red Cricket
Red Cricket

Reputation: 10470

How to find EC2 instances that have "null" for the PublicIpAddress?

When I run ...

$ aws ec2 describe-instances --region=us-west-1 \
> --filters Name=instance-state-name,Values=stopped \
> Name=ip-address,Values=null \
> Name=block-device-mapping.status,Values=attached \
> --query "Reservations[].Instances[].[InstanceId,PublicIpAddress,BlockDeviceMappings[].Ebs.VolumeId]"

I get back ...

[]

If I take out the filter Name=ip-address,Values=null I get this back ...

[
    [
        "i-XXXXX",
        null,
        [
            "vol-f6f6f6f"
        ]
    ],
    [
        "i-d4XXXX8b",
        "XX.XX.XXX.XX",
        [
            "vol-0ca0ca0ca"
        ]
    ],

How can I just get those EC2 instances that just have "null" for the PublicIpAddress?

Upvotes: 1

Views: 438

Answers (1)

John Rotenstein
John Rotenstein

Reputation: 269282

Since there is no public-ip, that filter doesn't seem to work.

Instead, I notice that such instances seem to have this entry:

"PublicDnsName": "",

Therefore, you should be able to use this logic:

aws ec2 describe-instances --query 'Reservations[].Instances[?PublicDnsName==``].InstanceId'

Upvotes: 1

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