Class: EC2::Host

Inherits:

Object

• Object
• EC2::Host

show all

Includes:

Enumerable

Defined in:

lib/ec2/host.rb,
lib/ec2/host/cli.rb,
lib/ec2/host/config.rb,
lib/ec2/host/version.rb,
lib/ec2/host/host_data.rb,
lib/ec2/host/role_data.rb,
lib/ec2/host/hash_util.rb,
lib/ec2/host/ec2_client.rb,
lib/ec2/host/string_util.rb

Overview

require 'ec2-host'
# Search by `Name` tag
EC2::Host.new(hostname: 'test').first # => test

# Search by `Roles` tag
EC2::Host.new(
  role: 'admin:haikanko',
).each do |host|
  # ...
end

or

EC2::Host.new(
  role1: 'admin',
  role2: 'haikanko',
).each do |host|
  # ...
end

# Or search
EC2::Host.new(
  {
      role1: 'db',
      role2: 'master',
  },
  {
      role1: 'web',
  }
).each do |host|
    # ...
end

EC2::Host.me.hostname # => 'test'

Defined Under Namespace

Modules: HashUtil, StringUtil Classes: CLI, Config, EC2Client, HostData, RoleData

Constant Summary

VERSION =

'0.5.1'

Instance Attribute Summary (collapse)

• - (Object) conditions readonly

  Returns the value of attribute conditions.

• - (Object) options readonly

  Returns the value of attribute options.

Class Method Summary (collapse)

• + (Object) configure(params = {})

  Configure EC2::Host.

• + (Object) ec2_client
• + (Host::Data) me

  Representing myself.

Instance Method Summary (collapse)

• - (Object) each {|data| ... }
• - (Object) ec2_client
• - (Host) initialize(*conditions) constructor

  A new instance of Host.

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# File 'lib/ec2/host.rb', line 82

def initialize(*conditions)
  conditions = [{}] if conditions.empty?
  conditions = [conditions] if conditions.kind_of?(Hash)
  @options = {}
  if conditions.size == 1
    @options = conditions.first.delete(:options) || {}
  else
    index = conditions.find_index {|condition| condition.has_key?(:options) }
    @options = conditions.delete_at(index)[:options] if index
  end
  raise ArgumentError, "Hash expected (options)" unless @options.is_a?(Hash)
  @conditions = []
  conditions.each do |condition|
    @conditions << Hash[condition.map {|k, v| [k, Array(v).map(&:to_s)]}]
  end
  raise ArgumentError, "Array of Hash, or Hash expected (conditions)" unless @conditions.all? {|h| h.kind_of?(Hash)}
end

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# File 'lib/ec2/host.rb', line 64

def conditions
  @conditions
end

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# File 'lib/ec2/host.rb', line 64

def options
  @options
end

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# File 'lib/ec2/host.rb', line 52

def self.configure(params = {})
  Config.configure(params)
end

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# File 'lib/ec2/host.rb', line 56

def self.ec2_client
  @ec2_client ||= EC2Client.new
end

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# File 'lib/ec2/host.rb', line 42

def self.me
  new(instance_id: ec2_client.instance_id).each do |d|
    return d
  end
  raise 'Not Found'
end

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# File 'lib/ec2/host.rb', line 101

def each(&block)
  @conditions.each do |condition|
    search(ec2_client.instances(condition), condition, &block)
  end
  return self
end

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# File 'lib/ec2/host.rb', line 60

def ec2_client
  self.class.ec2_client
end