How to use the same SSH key pair in all AWS regions

 

We begin by running AWS configure and add our access and secret keys:

$ aws configure

 

Verify the AWS CLI installed correctly:

$ aws –version

 

Configuring the SSH key pair

If you don’t have an SSH key pair or want to follow this article using a new one:

$ openssl genrsa -out ~/.ssh/aws.pem 2048ssh-keygen -y -f ~/.ssh/aws.pem > ~/.ssh/aws.pub

 

If you already have an SSH private key created using the AWS Console, extract the public key from it:

$ ssh-keygen -y -f ~/.ssh/aws.pem > ~/.ssh/aws.pub

 

Importing the SSH key pair

Now that you have the public key, declare the variable AWS_REGION containing a list with the regions to which you want to copy your SSH key. To check the full list of available AWS regions use this link.

 

$ AWS_REGION=”us-east-1 us-east-2 us-west-1 us-west-2 ap-south-1 eu-central-1 eu-west-1 eu-west-2″

If you don’t want to specify each region manually, you can use the ec2 describe-regions command to get a list of all available regions:

$ AWS_REGION=$(aws ec2 describe-regions –output text | awk ‘{print $3}’ | xargs)

Next, import the SSH public key to these regions, substituting your key’s name for <MyKey>:

$ for each in ${AWS_REGION} ; do aws ec2 import-key-pair –key-name mykeypair –public-key-material file://~/.ssh/aws.pub –region $each ; done

Also, if you want to display which SSH key is available in a region:

$ aws ec2 describe-key-pairs –region REGION

To delete an SSH key from a region:

$ aws ec2 delete-key-pair –key-name <MyKey> –region REGION

 

Source of information:

https://fedoramagazine.org/ssh-key-aws-regions/

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