.ssh/config builder

Creates a .ssh/config file from the ec2 instances tags.

Usage

Assumptions
you have ruby, bundler installed

First run: bundle install

Add right config to config.yml or the defaul values will be picked from AWS_ACCESS_KEY and AWS_SECRET_KEY environment variables. You can specify path to ssh_config_file inside config.yml or else output will be thrown to your screen which you can then redirect to any file.

Example Usage ./ssh_config_builder.rb >> ~/.ssh/config

Example

Say you have 2 app_servers, 3 background_servers and 2 db instances in AWS. This ruby script generates a .ssh/config file in the following format

#sample .ssh/config file

Host app_server
  Hostname ec2****.com
  User ubuntu

Host app_server1
  Hostname ec2****.com
  User ubuntu

Host background_server
  Hostname ec2****.com
  User ubuntu

Host background_server2
  Hostname ec2****.com
  User ubuntu

Host db1
  Hostname ec2****.com
  User ubuntu

This .ssh/config can be kept up-to-date by running this ruby script frequently.

Installing autocomplete script

This commands adds few lines of bash code to ~/.bashrc or ~/.bash_profile, which autocompletes HOST names Usage: ./install_autocomplete.rb

ssh App[press TAB]
AppServer AppServer1 AppServer2