Class: Zeployment::Aws

Inherits:
Object
  • Object
show all
Defined in:
lib/zeployment.rb

Class Method Summary collapse

Class Method Details

.deploy(name_of_load_balancer, login_command_without_ip, commands_to_run) ⇒ Object 



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# File 'lib/zeployment.rb', line 74

def self.deploy (name_of_load_balancer, , commands_to_run)
  instances_details = get_load_balancer_instances_description(name_of_load_balancer)
  instances_details["InstanceStates"].each do |instance|
    instance_id = instance["InstanceId"]
    instance_ip = get_ip_address_of_ec2_from_id(instance_id)
    puts instance_ip
    deregister_instance_from_load_balancer(name_of_load_balancer, instance_id)
    ("#{login_command_without_ip}@#{instance_ip}", commands_to_run)
    register_instance_with_load_balancer(name_of_load_balancer, instance_id)
    wait_till_the_instance_in_service(name_of_load_balancer, instance_id)
    puts ">>>>>>> Instance is in Service now <<<<<<<<<<<<<"
  end
end

.deregister_instance_from_load_balancer(name_of_load_balancer, instance_id) ⇒ Object 



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# File 'lib/zeployment.rb', line 55

def self.deregister_instance_from_load_balancer (name_of_load_balancer, instance_id)
  JSON.parse(`aws elb deregister-instances-from-load-balancer --load-balancer-name #{name_of_load_balancer} --instances #{instance_id}`)
end

.get_ip_address_of_ec2_from_id(instance_id) ⇒ Object 



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# File 'lib/zeployment.rb', line 44

def self.get_ip_address_of_ec2_from_id (instance_id)
  instance_description_response = `#{get_ip_address_of_ec2_from_id_command(instance_id)}`
  instance_description_hash = JSON.parse(instance_description_response)
  ip_address = instance_description_hash["Reservations"][0]["Instances"][0]["PublicIpAddress"]
  return ip_address
end

.get_ip_address_of_ec2_from_id_command(instance_id) ⇒ Object 



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# File 'lib/zeployment.rb', line 51

def self.get_ip_address_of_ec2_from_id_command (instance_id)
  return "aws ec2 describe-instances --instance-id #{instance_id}"
end

.get_load_balancer_instances_description(name_of_load_balancer) ⇒ Object 



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

def self.get_load_balancer_instances_description (name_of_load_balancer)
  load_balancers_instance_description_command = get_load_balancers_instances_description_command (name_of_load_balancer)
  load_balancer_instances_description = `#{load_balancers_instance_description_command}`
  return JSON.parse(load_balancer_instances_description)
end

.get_load_balancer_particular_instance_data(name_of_load_balancer, instance_id) ⇒ Object 



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

def self.get_load_balancer_particular_instance_data (name_of_load_balancer, instance_id)
  load_balancers_instance_description_command = "aws elb describe-instance-health --load-balancer-name #{name_of_load_balancer} --instances #{instance_id}"
  load_balancer_instances_description = `#{load_balancers_instance_description_command}`
  return JSON.parse(load_balancer_instances_description)
end

.get_load_balancers_instances_description_command(name_of_load_balancer) ⇒ Object 



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# File 'lib/zeployment.rb', line 18

def self.get_load_balancers_instances_description_command (name_of_load_balancer)
  return "aws elb describe-instance-health --load-balancer-name #{name_of_load_balancer}"
end

.instance_is_in_service?(name_of_load_balancer, instance_id) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/zeployment.rb', line 69

def self.instance_is_in_service? (name_of_load_balancer, instance_id)
  load_balancer_insrance_data_hash = get_load_balancer_particular_instance_data name_of_load_balancer, instance_id
  return load_balancer_insrance_data_hash["InstanceStates"][0]["State"] == "InService"
end

.login_and_run_commands(login_command, commands_to_run) ⇒ Object 



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# File 'lib/zeployment.rb', line 94

def self.(, commands_to_run)
  system("#{login_command} << #{commands_to_run} ")
end

.number_of_instances_in_service(name_of_load_balancer) ⇒ Object 



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# File 'lib/zeployment.rb', line 22

def self.number_of_instances_in_service (name_of_load_balancer)
  instances_in_service = 0
  load_balancer_instances_description_hash = get_load_balancer_instances_description(name_of_load_balancer)
  load_balancer_instances_description_hash["InstanceStates"].each do |instance_state|
    if instance_state["State"] == "InService"
      instances_in_service = instances_in_service + 1
    end
  end
  return instances_in_service
end

.number_of_instances_not_in_service(name_of_load_balancer) ⇒ Object 



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# File 'lib/zeployment.rb', line 33

def self.number_of_instances_not_in_service (name_of_load_balancer)
  instances_not_in_service = 0
  load_balancer_instances_description_hash = get_load_balancer_instances_description(name_of_load_balancer)
  load_balancer_instances_description_hash["InstanceStates"].each do |instance_state|
    if instance_state["State"] != "InService"
      instances_not_in_service = instances_not_in_service + 1
    end
  end
  return instances_not_in_service
end

.number_of_registered_instances_to_loadbalancer(name_of_load_balancer) ⇒ Object 



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# File 'lib/zeployment.rb', line 7

def self.number_of_registered_instances_to_loadbalancer (name_of_load_balancer)
  load_balancer_instances_description_hash = get_load_balancer_instances_description(name_of_load_balancer)
  return load_balancer_instances_description_hash["InstanceStates"].length
end

.register_instance_with_load_balancer(name_of_load_balancer, instance_id) ⇒ Object 



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# File 'lib/zeployment.rb', line 59

def self.register_instance_with_load_balancer (name_of_load_balancer, instance_id)
  JSON.parse(`aws elb register-instances-with-load-balancer --load-balancer-name #{name_of_load_balancer} --instances #{instance_id}`)
end

.wait_till_the_instance_in_service(name_of_load_balancer, instance_id) ⇒ Object 



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# File 'lib/zeployment.rb', line 88

def self.wait_till_the_instance_in_service(name_of_load_balancer, instance_id)
  while !instance_is_in_service?(name_of_load_balancer, instance_id) do
    puts ">>>>>>> Instance Not in Service <<<<<<<<<<<<<"
  end
end