List public IP addresses of EC2 instances

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?

Directly from the aws cli:

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

A Null Pointer

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.

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

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

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

来源：https://stackoverflow.com/questions/24938971/list-public-ip-addresses-of-ec2-instances

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