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 26

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'] || "DOWN"
    priv_ip = instance['PrivateIp'] || "N/A"
    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 }
  end
  my_instances
end

#get_stacks ⇒ Object 



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# File 'lib/owssh.rb', line 14

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 90

def owssh
  # Export environment variables for AWS CLI here
  $debug = false
  $ssh_key_file = "~/.ssh/id_rsa_dev"
  $owssh_config = "~/.owssh_conf"

  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
    puts "Getting list of stacks..."
    print_stacks($stacks)
    exit
  elsif ARGV[0] == "describe" && ARGV[1].nil? then
    $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
    stack_name = ARGV[1]
    if $stacks.has_key?(ARGV[1].downcase.to_s) 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
    $instances = get_instances($stacks[stack_name])

    if $instances.has_key?(ARGV[1]) then
      # Open interactive SSH connnection
      if ARGV[2].nil? then
        puts "Opening SSH connection to #{ARGV[1]}..."
        exec("ssh -i ~/.ssh/id_rsa_dev ubuntu@#{$instances[ARGV[1].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/id_rsa_dev ubuntu@#{$instances[ARGV[1].to_s]['PUB_IP']} '#{ARGV[2]}'")
      end
    else
      $first_instance = ""
      $instances.each do |instance_name, data|
        unless (instance_name =~ /#{ARGV[1].to_s}(.*)/).nil? || data["PUB_IP"] == "DOWN"
          $first_instance = instance_name
          break
        end
      end
      if $first_instance == "" then
        puts "Could not find host with name or type of '#{ARGV[1]}'"
        exit
      else
        if ARGV[2].nil? then
          puts "Opening SSH connection to first of type '#{ARGV[1]}' which is '#{$first_instance}'..."
        else
          puts "Running command '#{ARGV[2]}' on first host of type '#{ARGV[1]}' which is '#{$first_instance}'..."
        end
        exec("ssh -i ~/.ssh/id_rsa_dev ubuntu@#{$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 with no arguments for help!"
    exit
  end
end

#print_help ⇒ Object 



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# File 'lib/owssh.rb', line 77

def print_help
  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..."
  exit
end

#print_instances(instances) ⇒ Object 



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# File 'lib/owssh.rb', line 43

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)
    end
    instances.each do |instance_name, data|
      row do
        column(instance_name)
        column(data['PUB_IP'])
        column(data['PRIV_IP'])
        column(data['TYPE'])
      end
    end
  end
end

#print_stacks(stacks) ⇒ Object 



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# File 'lib/owssh.rb', line 62

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