List public IP addresses of EC2 instances

Question

I want to list the public IP addresses of my EC2 instances using Bash, separated by a delimiter (space or a new-line).

I tried to pipe the output to jq with aws ec2 describe-instances | jq, but can't seem to isolate just the IP addresses.

Can this be done by aws alone, specifying arguments to jq, or something else entirely?

This shows me my own IP address.. not a list of those my instances have — Bas Peeters, Jul 24 '14 at 16:31
If the output of `aws ec2 describe-instance` has the info you want, then you'll have to show some sample output of that command to get general help since most people won't have `aws` installed. — ooga, Jul 24 '14 at 16:37
For those who came here looking to get the IP via a script running **on the instance**, see https://stackoverflow.com/a/46323720/117471 — Bruno Bronosky, Jan 17 '18 at 19:32

score 108 · Accepted Answer · answered Jul 24 '14 at 17:00

108

Directly from the aws cli:

aws ec2 describe-instances \
  --query "Reservations[*].Instances[*].PublicIpAddress" \
  --output=text

answered Jul 24 '14 at 17:00

Julio Faerman

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Awesome. But this outputs three columns: one with IP's on every row and two with IP's only on some rows. I get a nice tab-separated list when I use `Reservations[*].Instances[*].PublicIpAddress[]` for the query argument instead. – Bas Peeters Jul 25 '14 at 08:08
7

Wrap your `PublicIpAddress` in square-brackets to ensure 1-per-line, as suggested here: https://github.com/aws/aws-cli/issues/914#issuecomment-56210312. This works for me `--query 'Reservations[].Instances[].[PublicIpAddress]` – jaygooby Sep 05 '16 at 20:40
Is there a way to filter using security group? I tried: "aws ec2 describe-instances --filters Name=vpc-id,Values={vpcid} Name=InstanceId,Values={securityGroupID} --output=text" . But I get nothing – Shahar Hamuzim Rajuan Feb 05 '18 at 07:51
2

If you want the instances' KeyName to go with the public IP address, you can get it with `--query "Reservations[*].Instances[*].[KeyName, PublicIpAddress]"` – Daryn May 20 '19 at 13:36

Brad Giaccio · Answer 2 · 2020-04-07T18:24:32.110

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Filter on running instances (you can drop that part if you don't need it)
Query for each PublicIPaddress and the Name Tag, handling when Name isn't set

aws ec2 describe-instances \
  --filter "Name=instance-state-name,Values=running" \
  --query "Reservations[*].Instances[*].[PublicIpAddress, Tags[?Key=='Name'].Value|[0]]" \
  --output text

edited Apr 07 '20 at 18:24

answered Apr 10 '18 at 13:09

Brad Giaccio

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score 7 · Answer 3 · edited Feb 19 '20 at 05:18

7

The below command would list the IP addresses of all your running EC2 instances

aws ec2 describe-instances | grep PublicIpAddress | grep -o -P "\d+\.\d+\.\d+\.\d+" | grep -v '^10\.'

Hope that answers your query...

But this works without all the errors about access:

wget -qO- http://instance-data/latest/meta-data/public-ipv4/|grep .

edited Feb 19 '20 at 05:18

dkb

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answered Jul 24 '14 at 16:43

A Null Pointer

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I just tried the same command today 10/23/15 and it works perfectly fine without any problems. What is the error that you see ? – A Null Pointer Oct 23 '15 at 20:30
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Grep works differently on OSX which has the BSD version of grep vs GNU found mostly on other standard Linux distributions http://stackoverflow.com/questions/19413494/does-grep-work-differently-on-osx – A Null Pointer Oct 26 '15 at 21:52

score 5 · Answer 4 · answered Sep 20 '17 at 13:42

5

You can use instance metadata so you can run the following command from the ec2 instance:

curl http://169.254.169.254/latest/meta-data/public-ipv4

and it will give you the public IP of the instance. If you want the private IP, you will run

curl http://169.254.169.254/latest/meta-data/local-ipv4

answered Sep 20 '17 at 13:42

Frederic Henri

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This is great! However, I suggest using `wget -qO -` instead of `curl` (even though I use curl 99.9% or the time in my scripts. The reason is that `curl` will output the content of the 404 page if the server doesn't have a public IP, and `wget` does not. So in bash it's simple to do `public_ip="$(wget -qO - http://169.254.169.254/latest/meta-data/public-ipv4)"` and get expected results. You can then test with `if [[ -n $public_ip ]]; then echo "Public IP: $public_ip"; fi` – Bruno Bronosky Jan 17 '18 at 19:29

score 4 · Answer 5 · answered Jan 03 '17 at 07:15

4

aws ec2 describe-instances --query "Reservations[].Instances[][PublicIpAddress]"

Refer: http://docs.aws.amazon.com/cli/latest/userguide/controlling-output.html

answered Jan 03 '17 at 07:15

Sarat Chandra

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List public IP addresses of EC2 instances

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