Class: Environment

Inherits:
Object
  • Object
show all
Includes:
Validations
Defined in:
lib/dew/models/environment.rb

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(name, servers = [], database = nil) ⇒ Environment

Returns a new instance of Environment.



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# File 'lib/dew/models/environment.rb', line 8

def initialize name, servers=[], database=nil
  @name = name
  @servers = servers
  @database = database
  valid?
end

Instance Attribute Details

#database ⇒ Object (readonly)

Returns the value of attribute database.



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# File 'lib/dew/models/environment.rb', line 6

def database
  @database
end

#name ⇒ Object (readonly)

Returns the value of attribute name.



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# File 'lib/dew/models/environment.rb', line 6

def name
  @name
end

#servers ⇒ Object (readonly)

Returns the value of attribute servers.



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# File 'lib/dew/models/environment.rb', line 6

def servers
  @servers
end

Class Method Details

.create(name, profile) ⇒ Object 



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# File 'lib/dew/models/environment.rb', line 25

def self.create(name, profile)
  raise "Keypair '#{profile.keypair}' is not available in AWS #{Cloud.region}." unless Cloud.keypair_exists?(profile.keypair)
  raise "AMI for '#{Cloud.region}' is not setup in the '#{profile.profile_name}' profile." unless profile.ami

  environment = new(name)
  Inform.info "Creating new environment %{name}", :name => name

  # Creating the database is the longest running task, so do that first.
  password = Password.random if profile.has_rds?
  environment.add_database(profile.rds_size, password) if profile.has_rds?

  (1..profile.count).each do
    environment.add_server(profile.ami, profile.size, profile.keypair, profile.security_groups, profile.username)
  end

  environment.add_elb(profile.elb_listener_ports) if profile.has_elb?

  environment.wait_until_ready

  environment.configure_servers_for_database password if profile.has_rds?
  Inform.info "Environment %{name} ready!", :name => name
  environment
end

.get(name) ⇒ Object 



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# File 'lib/dew/models/environment.rb', line 19

def self.get name
  servers = Server.find('Environment', name)
  database = Database.get(name)
  servers.length > 0 || database ? new(name, servers, database) : nil
end

.index ⇒ Object 



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# File 'lib/dew/models/environment.rb', line 53

def self.index
  #environments = rows.inject({}) { |h, (name, owner)| h[name] = Environment.get(name); h }
  #items = rows.collect { |name, owner| [name, owner, environments[name].servers.size, environments[name].database] }
  #table(%w(name owner instance_count database), *rows).to_s.indent
  Inform.info View.new('Environments', owners, %w(name owner)).index
end

.owners ⇒ Object 



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# File 'lib/dew/models/environment.rb', line 49

def self.owners
  Cloud.valid_servers.collect(&:tags).collect { |h| {:name => h['Environment'], :owner => h['Creator']} if h['Environment'] }.uniq.compact
end

Instance Method Details

#add_database(size, password) ⇒ Object 



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# File 'lib/dew/models/environment.rb', line 153

def add_database size, password
  Inform.info "Adding Database %{name} of size %{size} with master password %{password}",
    :name => name, :size => size, :password => password do
    @database = Database.create!(name, size, password)
  end
end

#add_elb(listener_ports = []) ⇒ Object 



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# File 'lib/dew/models/environment.rb', line 144

def add_elb listener_ports=[]
  zones = servers.map {|s| s.availability_zone}.uniq
  Inform.info "Adding Load Balancer for availability zone(s) %{zones}", :zones => zones.join(', ') do
    Cloud.elb.create_load_balancer(zones, name, listeners_from_ports(listener_ports))
    Inform.debug("ELB created, adding instances...")
    Cloud.elb.register_instances_with_load_balancer(servers.map {|s| s.id}, name)
  end
end

#add_server(ami, size, keypair, groups, username) ⇒ Object 



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# File 'lib/dew/models/environment.rb', line 120

def add_server(ami, size, keypair, groups, username)
  Inform.info "Adding server using AMI %{ami} of size %{size}, keypair %{keypair} and security groups %{groups}",
    :ami => ami, :size => size, :keypair => keypair, :groups => groups.join(',') do
    server = Server.create!( ami, size, keypair, groups )
    server.add_tag('Environment', name)
    server.add_tag('Creator', ENV['USER'])
    server_name = "#{name} #{servers.count + 1}"
    server.add_tag('Name', server_name)
    server.add_tag('Username', username) # Needed for SSH
    Inform.debug("%{name} ID: %{id} AZ: %{az}", :name => server_name, :id =>server.id, :az => server.availability_zone)
    servers << server
  end
end

#add_server_to_elb(server) ⇒ Object 



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# File 'lib/dew/models/environment.rb', line 134

def add_server_to_elb server
  Inform.debug("Adding %{id} to ELB", :id => server.id)
  Cloud.elb.register_instances_with_load_balancer([server.id], name)
end

#configure_servers_for_database(password) ⇒ Object 



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# File 'lib/dew/models/environment.rb', line 179

def configure_servers_for_database password
  Inform.info "Configuring servers for database" do
    servers.each do |server|
      Inform.debug "%{id}", :id => server.id
      server.configure_for_database(database, password)
    end
  end
end

#destroy ⇒ Object 



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# File 'lib/dew/models/environment.rb', line 102

def destroy
  servers.each do |server|
    Inform.info("Destroying server %{serverid}", :serverid => server.id) do
      server.destroy
    end
  end
  if database
    Inform.info("Destroying database") do
      database.destroy(nil)
    end
  end
  if has_elb?
    Inform.info("Destroying load balancer") do
      Cloud.elb.delete_load_balancer(name)
    end
  end
end

#elb ⇒ Object 



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# File 'lib/dew/models/environment.rb', line 188

def elb
  @elb ||= Cloud.elb.load_balancers.detect { |elb| elb.id == name }  # XXX - need to refactor
end

#has_elb? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/dew/models/environment.rb', line 192

def has_elb?
  elb_descriptions.select { |elb|
    elb['LoadBalancerName'] == name
  }.length > 0
end

#remove_server_from_elb(server) ⇒ Object 



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# File 'lib/dew/models/environment.rb', line 139

def remove_server_from_elb server
  Inform.debug("Removing %{id} from ELB", :id => server.id)
  Cloud.elb.deregister_instances_from_load_balancer([server.id], name)
end

#show(options = {}) ⇒ Object 



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# File 'lib/dew/models/environment.rb', line 60

def show(options = {})
  return show_json if options[:json]

  result = ""

  result << "ENVIRONMENT:\n"

  result << "NAME: #{name}\n"
  result << "REGION: #{Cloud.region}\n"
  result << "ACCOUNT: #{Cloud..aws_user_id}\n"

  unless servers.empty?
    #keys = %w(id flavor_id public_ip_address state created_at key_name tags)
    keys = %w(id flavor_id public_ip_address state created_at groups key_name availability_zone creator)
    servers_view = View.new('SERVERS', servers, keys)
    result << servers_view.index
  end

  if elb
    elbs_view = View.new('ELB', [elb], %w(created_at dns_name instances availability_zones))
    result << elbs_view.show(0)
  end

  if database
    databases_view = View.new('DATABASE', [database], %w(flavor_id state created_at availability_zone db_security_groups))
    result << databases_view.show(0)
  end

  Inform.info result
end

#show_json ⇒ Object 



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# File 'lib/dew/models/environment.rb', line 91

def show_json
  json = servers.map do |s|
    {
      'public_dns' => s.dns_name,
      'public_ip' => s.public_ip_address
    }
  end
  
  puts JSON.pretty_generate(json)
end

#valid? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/dew/models/environment.rb', line 15

def valid?
  Validation::validates_format_of @name, /^[a-zA-Z0-9-]+$/
end

#wait_until_ready ⇒ Object 



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# File 'lib/dew/models/environment.rb', line 160

def wait_until_ready
  Inform.info "Waiting for servers to become ready" do
    servers.each do |server|
      ip_permissions = server.groups.map { |group_name| Cloud.security_groups[group_name] }.compact.collect(&:ip_permissions)
      if ip_permissions.flatten.empty?
        Inform.warning "Server %{id} has no ip_permissions in its security groups %{security_group_names}", :id => server.id, :security_group_names => server.groups.inspect
      else
        Inform.debug "Trying to connect to %{id}", :id => server.id
        server.wait_until_ready
      end
    end
  end
  if database
    Inform.info "Waiting for database to become ready" do
      database.wait_until_ready if database
    end
  end
end