SSH into an EC2 instance by tag

README.md

Usage:

$ ec2-login-amazon <tag>

• Aside from the AWS CLI tools, you'll need jq: https://stedolan.github.io/jq/
• If multiple instances have the tag you specify, the first one will be chosen
• There are separate commands for Amazon Linux and Ubuntu because, aside from looking at the AMI ID, there's no way to know which user name to use

ec2-login-amazon

#!/bin/bash
if [[ -z $SSH_DIR ]]
  then
    SSH_DIR="~/.ssh"
fi
PEM_SUFFIX=".pem"
result=(`aws ec2 describe-instances | \
  jq -r ".Reservations[] | \
  .Instances[0] | \
  { dns:.PublicDnsName, key:.KeyName, match:(.Tags[].Value // [] | select(. == \"$1\") | length > 0), state:.State.Name } | \
  select(.state | contains(\"running\")) | \
  .dns, .key"`)
host=${result[0]}
key=${result[1]}
ssh -i $SSH_DIR/$key$PEM_SUFFIX ec2-user@$host

ec2-login-ubuntu

#!/bin/bash
if [[ -z $SSH_DIR ]]
  then
    SSH_DIR="~/.ssh"
fi
PEM_SUFFIX=".pem"
result=(`aws ec2 describe-instances | \
  jq -r ".Reservations[] | \
  .Instances[0] | \
  { dns:.PublicDnsName, key:.KeyName, match:(.Tags[].Value // [] | select(. == \"$1\") | length > 0), state:.State.Name } | \
  select(.state | contains(\"running\")) | \
  .dns, .key"`)
host=${result[0]}
key=${result[1]}
ssh -i $SSH_DIR/$key$PEM_SUFFIX ubuntu@$host