Class: Owssh

Inherits:
Object
  • Object
show all
Includes:
CommandLineReporter
Defined in:
lib/owssh.rb

Instance Method Summary collapse

Instance Method Details

#get_instances(id) ⇒ Object 



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# File 'lib/owssh.rb', line 24

def get_instances(id)
  my_instances = {}
  instances_json = JSON.parse(`AWS_CONFIG_FILE=#{$aws_config_file} aws --profile #{$aws_profile} opsworks describe-instances --stack-id #{id}`)
  instances_json['Instances'].each do |instance|
    pub_ip = instance['ElasticIp'] || instance['PublicIp'] || "N/A"
    priv_ip = instance['PrivateIp'] || "N/A"
    status = instance['Status']
    match = instance['Hostname'].match(/(.*)\d+/) rescue nil
    if !match.nil? then
      type = match[1].to_s
    else
      type = "N/A"
    end
    my_instances[instance['Hostname'].to_s] = { "PUB_IP" => pub_ip.to_s, "PRIV_IP" => priv_ip.to_s, "TYPE" => type, "STATUS" => status }
  end
  my_instances
end

#get_stacks ⇒ Object 



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# File 'lib/owssh.rb', line 12

def get_stacks
  my_stacks = {}
  stacks_json = JSON.parse(`AWS_CONFIG_FILE=#{$aws_config_file} aws --profile #{$aws_profile} opsworks describe-stacks`)

  stacks_json['Stacks'].each do |stack|
    if $debug then puts "Stack Name: #{stack['Name'].gsub(' ','_').downcase}     Stack ID: #{stack['StackId']}" end
    stack_name = stack['Name'].gsub(' ','_').downcase
    my_stacks[stack_name.to_s] = stack['StackId']
  end
  my_stacks
end

#owssh ⇒ Object 



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# File 'lib/owssh.rb', line 104

def owssh
  # Export environment variables for AWS CLI here
  $debug = false
  $aws_profile = ENV['AWS_DEFAULT_PROFILE'] || "default"
  $ssh_key_file = ENV['OWSSH_SSH_KEY_FILE'] || "~/.ssh/id_rsa_owssh"
  $aws_config_file = ENV['OWSSH_AWS_CONFIG_FILE'] || ENV['AWS_CONFIG_FILE'] || "~/.aws/config.owssh"
  $ssh_user = ENV['OWSSH_USER'] || "ubuntu"

  if ARGV.empty?
    puts "Please supply some options. Try 'owssh help' for available commands"
    exit
  end

  $stacks = {}
  $instances = {}

  $stacks = get_stacks

  if ARGV[0] == "help" then
    print_help
  elsif ARGV[0] == "list" then
    # List all stacks
    puts "Getting list of stacks..."
    print_stacks($stacks)
    exit
  elsif ARGV[0] == "describe" && ARGV[1].nil? then
    # Describe all stacks
    $stacks.each do |stack_name, id|
      puts "Getting data for Stack: #{stack_name}"
      $instances = get_instances(id)
      print_instances($instances)
    end
    exit
  elsif ARGV[0] == "describe" && !ARGV[1].nil? then
    # Describe a particular stack
    stack_name = ARGV[1].downcase.to_s
    if $stacks.has_key?(stack_name) then
      if $debug then puts "Stack ID: #{$stacks[stack_name]}" end
      puts "Getting data for Stack: #{stack_name}"
      $instances = get_instances($stacks[stack_name])
      print_instances($instances)
    elsif
      puts "Unable to find stack named '#{ARGV[1]}'"
      exit
    end
  elsif $stacks.has_key?(ARGV[0].downcase.to_s) then
    # SSH to the host
    if ARGV[1].nil? then
      puts "Please enter an instance name. I.E. rails-app3"
      exit
    end

    stack_name = ARGV[0].downcase.to_s
    $instances = get_instances($stacks[stack_name])

    if $instances.has_key?(ARGV[1].downcase.to_s) then
      # SSH to specific host
      if ARGV[2].nil? then
        puts "Opening SSH connection to #{ARGV[1]}..."
        exec("ssh -i #{$ssh_key_file} #{$ssh_user}@#{$instances[ARGV[1].downcase.to_s]['PUB_IP']}")
      elsif ARGV[3].nil? then
        # Run command through SSH on host
        puts "Running comand #{ARGV[2]} on host #{ARGV[1]}..."
        exec("ssh -i #{$ssh_key_file} #{$ssh_user}@#{$instances[ARGV[1].downcase.to_s]['PUB_IP']} '#{ARGV[2]}'")
      end
    else
      # SSH to first instance of certain type
      $first_instance = ""
      $instances.each do |instance_name, data|
        unless (instance_name =~ /#{ARGV[1].to_s}(.*)/).nil? || data["STATUS"] == ( "stopped" || "pending" || "requested" || "pending" )
          $first_instance = instance_name
          break
        end
      end
      if $first_instance == "" then
        puts "Could not find valid host with name or type of '#{ARGV[1]}'"
        exit
      else
        if ARGV[2].nil? then
          puts "Opening SSH connection to first of type '#{ARGV[1]}' which is '#{$first_instance}'..."
        else
          puts "Running command '#{ARGV[2]}' on first host of type '#{ARGV[1]}' which is '#{$first_instance}'..."
        end
        exec("ssh -i #{$ssh_key_file} #{$ssh_user}@#{$instances[$first_instance.to_s]['PUB_IP']} '#{ARGV[2]}'")
      end
    end
  else
    puts "I don't quite understand what you're asking me to do..."
    puts " Try running 'owssh help' for help!"
    exit
  end
end

#print_help ⇒ Object 



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# File 'lib/owssh.rb', line 82

def print_help
  puts "Version #{Gem.loaded_specs['owssh'].version}"
  puts ""
  puts "Usage:"
  puts "owssh list                                                   - List all environments"
  puts "owssh describe                                               - Show details of hosts in all stacks"
  puts "owssh describe [Stack Name]                                  - Show details of a specific stack"
  puts "owssh [Stack Name] [Hostname or Type]                        - SSH to a host in a stack"
  puts "owssh [Stack Name] [Hostname or Type] \"Your command here\"    - SSH to a host in a stack and run a command"
  puts ""
  puts " Type      - The type of host. I.E. rails-app, resque, etc..."
  puts " Hostname  - The name of the host. I.E. rails-app1, resque1, etc..."
  puts ""
  puts "Environment Variables:"
  puts "  AWS_DEFAULT_PROFILE         Defines the AWS config profile to use"
  puts "  OWSSH_SSH_KEY_FILE          Path to your ssh key file"
  puts "  OWSSH_AWS_CONFIG_FILE       Path to your aws config file if you want it to be different from default"
  puts "  OWSSH_USER                  The user to SSH as. Default is ubuntu"
  puts ""
  exit
end

#print_instances(instances) ⇒ Object 



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# File 'lib/owssh.rb', line 42

def print_instances(instances)
  table(:border => true) do
    row do
      column('Hostname', :width => 20)
      column('Public IP', :width => 15, :align => 'right')
      column('Private IP', :width => 15, :align => 'right')
      column('Type', :width => 16)
      column('Status', :width => 8)
    end
    instances.each do |instance_name, data|
      row do
        column(instance_name)
        column(data['PUB_IP'])
        column(data['PRIV_IP'])
        column(data['TYPE'])
        column(data['STATUS'])
      end
    end
  end
end

#print_stacks(stacks) ⇒ Object 



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# File 'lib/owssh.rb', line 63

def print_stacks(stacks)
  table(:border => true) do
    row do
      column('Stack Name', :width => 20)
      column('Stack ID', :width => 40, :align => 'right')
    end
    stacks.each do |stack_name, id|
      row do
        column(stack_name)
        column(id)
      end
    end
  end
end

#ssh_connect(connect_user, su_to_user, ssh_key, command) ⇒ Object 



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# File 'lib/owssh.rb', line 78

def ssh_connect(connect_user, su_to_user, ssh_key, command)

end