Class: Rebi::EC2

Inherits:
Object
  • Object
show all
Includes:
Log
Defined in:
lib/rebi/ec2.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods included from Log

#colorize, #colorize_prefix, #error, #error_label, #h1, #h2, #h3, #h4, #hstatus, #log

Constructor Details

#initialize(client) ⇒ EC2

Returns a new instance of EC2.



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# File 'lib/rebi/ec2.rb', line 8

def initialize client
  @client = client
end

Instance Attribute Details

#client ⇒ Object (readonly)

Returns the value of attribute client.



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# File 'lib/rebi/ec2.rb', line 6

def client
  @client
end

Instance Method Details

#authorize_ssh(instance_id, &blk) ⇒ Object 



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# File 'lib/rebi/ec2.rb', line 21

def authorize_ssh instance_id, &blk
  group_id = describe_instance(instance_id).security_groups.map(&:group_id).sort.first

  my_ip = `dig +short myip.opendns.com @resolver1.opendns.com`.chomp
  cidr_ip = my_ip.present? ? "#{my_ip}/32" : "0.0.0.0/0"

  begin
    log "Attempting to open port 22."
    client.authorize_security_group_ingress({
      group_id: group_id,
      ip_protocol: "tcp",
      to_port: 22,
      from_port: 22,
      cidr_ip: cidr_ip
      })
    log "SSH port 22 open."

  rescue Aws::EC2::Errors::InvalidPermissionDuplicate
    log "Opened already"
  rescue Exception => e
    raise e
  end

  yield if block_given?

  ensure
    begin
      log "Attempting to close port 22."
      client.revoke_security_group_ingress({
        group_id: group_id,
        ip_protocol: "tcp",
        to_port: 22,
        from_port: 22,
        cidr_ip: cidr_ip
        })
    rescue Exception => e
      raise e
    end
end

#describe_instance(instance_id) ⇒ Object 



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# File 'lib/rebi/ec2.rb', line 16

def describe_instance instance_id
  res = client.describe_instances instance_ids: [instance_id]
  return res.reservations.first.instances.first
end

#log_label ⇒ Object 



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# File 'lib/rebi/ec2.rb', line 12

def log_label
  "EC2"
end