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aws_manage.rb
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aws_manage.rb
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require 'rubygems'
require 'aws-sdk'
require 'ipaddress'
require 'yaml'
require 'net/ssh'
class Aws_Manage
@@image_id = 'ami-d05e75b8'
def initialize
# windows openssl hack
Aws.use_bundled_cert!
# load config
@config = YAML.load_file 'config.yaml'
# set region
Aws.config[:region] = @config['region']
# set login credentials
Aws.config[:credentials] = Aws::Credentials.new(@config['access_key_id'], @config['secret_access_key'])
# ec2 client initialization (class scope)
@@ec2 = Aws::EC2::Client.new
end
# start new instance
def create_instance
start = @@ec2.run_instances({
image_id: @@image_id,
min_count: 1,
max_count: 1,
instance_type: 't2.micro',
key_name: 'sajat',
security_group_ids: ['cheppers'],
})
instances = start.instances
instance_id = instances[0].instance_id
end
# terminate an instance
def terminate_instance(instance_id)
terminate = @@ec2.terminate_instances({
instance_ids: [instance_id]
})
return terminate
end
def get_instance_ids(running_only = false)
ids = Hash.new
filter_hash = Hash.new
filter_hash = {name: 'instance-state-name', values: ['running']} if running_only
desc = @@ec2.describe_instances({
filters: [ filter_hash ]
})
desc.reservations.each do |reservation|
reservation.instances.each do |instance|
ids[instance.instance_id] = instance.state.name
end
end
return ids
end
# fetch public ip for specific instance
def fetch_public_ip(instance_id)
while true do
desc = @@ec2.describe_instances({
instance_ids: [instance_id]
})
ipaddr = desc.reservations[0].instances[0].public_ip_address
if (IPAddress.valid? ipaddr)
return ipaddr
end
sleep 5
yield
end
end
def install_application(instance_id, package_name)
@ipaddr = $aws.fetch_public_ip(instance_id)
@ssh = Net::SSH.start(@ipaddr, 'ubuntu', :host_key => "ssh_rsa", :encryption => "blowfish-cbc", :keys => [ "#{Dir.home}/Dropbox/id_rsa" ], :compression => "zlib")
if @ssh.exec!("dpkg -l #{package_name} &> /dev/null;echo $?").to_i > 0
@res = @ssh.exec!("sudo apt-get update && sudo apt-get install #{package_name} -y")
if @ssh.exec!("dpkg -l #{package_name} &> /dev/null;echo $?").to_i > 0
return false
end
end
@ssh.close
return true
end
end
# menu methods
def create_new_instance
print "Start new instance... "
instance_id = $aws.create_instance
puts "done (instance id: #{instance_id})"
return instance_id
end
def get_public_ip(instance_id = nil)
if instance_id.nil?
@ids = $aws.get_instance_ids(true)
if @ids.nil? || @ids.size == 0
puts "No running instances"
return false
end
if @ids.size == 1
instance_id = @ids.keys[0]
end
end
print "Waiting for public ip"
@ip_address = $aws.fetch_public_ip(instance_id) { print "." }
puts " Found: #{@ip_address}"
end
def terminate_instance(instance_id = nil)
if instance_id.nil?
@ids = $aws.get_instance_ids(true)
if @ids.nil? || @ids.size == 0
puts "No running instances"
return false
end
if @ids.size == 1
instance_id = @ids.keys[0]
end
if @ids.size > 1
puts "Multiple instances found, please choose one of them. Type \"all\" to terminate all."
counter = 1
@ids.each_key { |id|
puts "#{counter}. #{id}"
counter+=1
}
print "Your choice: "
choice = gets.chomp
if(choice == "all")
@ids.each_key { |id| terminate_instance(id)}
return true
else
if choice.to_i > 0 && choice.to_i < counter
instance_id = @ids.keys[choice.to_i-1]
else
puts "You have to select from the list, exiting..."
return false
end
end
end
end
puts "Instance terminated (id: #{instance_id})"
return $aws.terminate_instance(instance_id)
end
def install_package(package)
@ret = $aws.install_application('i-5909c2f2', package)
if(!@ret)
puts "Package installation (#{package}) was unsuccessful"
else
puts "Package #{package} installed successful"
end
end
# main program
$aws = Aws_Manage.new
puts "Choose an option"
puts "1. create new instance"
puts "2. get instances public ip"
puts "3. terminate an instance"
puts "4. install puppet"
print "Your choice (number): "
choice = gets.chomp
case choice.to_i
when 1
create_new_instance
when 2
get_public_ip
when 3
terminate_instance
when 4
install_package('puppet')
else
puts "Please choose a number from the list"
end