Class: Cumulus::ELB::LoadBalancerDiff

Inherits:
Common::Diff show all
Includes:
LoadBalancerChange
Defined in:
lib/elb/models/LoadBalancerDiff.rb

Overview

Public: Represents a single difference between local configuration and an AWS Load Balancer.

Defined Under Namespace

Classes: BackendChange, TagChange

Constant Summary

Constants included from LoadBalancerChange

Cumulus::ELB::LoadBalancerChange::BACKEND, Cumulus::ELB::LoadBalancerChange::CROSS, Cumulus::ELB::LoadBalancerChange::DRAINING, Cumulus::ELB::LoadBalancerChange::HEALTH, Cumulus::ELB::LoadBalancerChange::IDLE, Cumulus::ELB::LoadBalancerChange::INSTANCES, Cumulus::ELB::LoadBalancerChange::INTERNAL, Cumulus::ELB::LoadBalancerChange::LISTENERS, Cumulus::ELB::LoadBalancerChange::LOG, Cumulus::ELB::LoadBalancerChange::SECURITY, Cumulus::ELB::LoadBalancerChange::SUBNETS, Cumulus::ELB::LoadBalancerChange::TAGS

Constants included from Common::DiffChange

Common::DiffChange::ADD, Common::DiffChange::MODIFIED, Common::DiffChange::UNMANAGED

Instance Attribute Summary collapse

Attributes inherited from Common::Diff

#aws, #changes, #info_only, #local, #type

Class Method Summary collapse

Instance Method Summary collapse

Methods included from Common::DiffChange

next_change_id

Methods inherited from Common::Diff

#add_string, added, #initialize, #local_name, modified, #to_s, unmanaged, #unmanaged_string

Constructor Details

This class inherits a constructor from Cumulus::Common::Diff

Instance Attribute Details

#backend_policies ⇒ Object

Returns the value of attribute backend_policies.



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# File 'lib/elb/models/LoadBalancerDiff.rb', line 37

def backend_policies
  @backend_policies
end

#health_diffs ⇒ Object

Returns the value of attribute health_diffs.



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# File 'lib/elb/models/LoadBalancerDiff.rb', line 36

def health_diffs
  @health_diffs
end

#instances ⇒ Object

Returns the value of attribute instances.



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# File 'lib/elb/models/LoadBalancerDiff.rb', line 35

def instances
  @instances
end

#listeners ⇒ Object

Returns the value of attribute listeners.



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# File 'lib/elb/models/LoadBalancerDiff.rb', line 31

def listeners
  @listeners
end

#log_diffs ⇒ Object

Returns the value of attribute log_diffs.



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# File 'lib/elb/models/LoadBalancerDiff.rb', line 38

def log_diffs
  @log_diffs
end

#security_groups ⇒ Object

Returns the value of attribute security_groups.



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# File 'lib/elb/models/LoadBalancerDiff.rb', line 33

def security_groups
  @security_groups
end

#subnets ⇒ Object

Returns the value of attribute subnets.



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# File 'lib/elb/models/LoadBalancerDiff.rb', line 32

def subnets
  @subnets
end

#tags ⇒ Object

Returns the value of attribute tags.



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# File 'lib/elb/models/LoadBalancerDiff.rb', line 34

def tags
  @tags
end

Class Method Details

.access_log(log_diffs) ⇒ Object 



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# File 'lib/elb/models/LoadBalancerDiff.rb', line 149

def self.access_log(log_diffs)
  diff = LoadBalancerDiff.new(LOG, nil, nil)
  diff.log_diffs = log_diffs
  diff
end

.backend_policies(aws, local) ⇒ Object 



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# File 'lib/elb/models/LoadBalancerDiff.rb', line 127

def self.backend_policies(aws, local)
  # map the aws and local policies to their ports
  aws_backends = Hash[aws.map { |b| [b.instance_port, b.policy_names] }]
  local_backends = Hash[local.map { |b| [b.instance_port, b.policy_names] }]

  added = local_backends.reject { |port, _| aws_backends.has_key? port }.map do |port, policies|
    BackendChange.new(port, nil, policies)
  end
  removed = aws_backends.reject { |port, _| local_backends.has_key? port }.map do |port, policies|
    BackendChange.new(port, policies, nil)
  end
  modified = local_backends.reject { |port, _| !aws_backends.has_key? port }.map do |port, policies|
    if aws_backends[port].sort != policies.sort
      BackendChange.new(port, aws_backends[port], policies)
    end
  end.reject(&:nil?)

  diff = LoadBalancerDiff.new(BACKEND, aws, local)
  diff.backend_policies = Common::ListChange.new(added, removed, modified)
  diff
end

.health_check(health_diffs) ⇒ Object 



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# File 'lib/elb/models/LoadBalancerDiff.rb', line 120

def self.health_check(health_diffs)
  diff = LoadBalancerDiff.new(HEALTH, nil, nil)
  diff.health_diffs = health_diffs
  diff
end

.instances(aws, local) ⇒ Object 



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# File 'lib/elb/models/LoadBalancerDiff.rb', line 112

def self.instances(aws, local)
  added = local - aws
  removed = aws - local
  diff = LoadBalancerDiff.new(INSTANCES, aws, local)
  diff.instances = Common::ListChange.new(added, removed)
  diff
end

.internal(aws, local) ⇒ Object 



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# File 'lib/elb/models/LoadBalancerDiff.rb', line 81

def self.internal(aws, local)
  LoadBalancerDiff.new(INTERNAL, aws, local)
end

.listeners(aws, local) ⇒ Object 



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# File 'lib/elb/models/LoadBalancerDiff.rb', line 40

def self.listeners(aws, local)
  # map listeners to load balancer port
  aws_listeners = Hash[aws.map { |l| [l.listener.load_balancer_port, l] }]
  local_listeners = Hash[local.map { |l| [l.load_balancer_port, l] }]

  added_listeners = local_listeners.reject { |k, v| aws_listeners.has_key? k }
  removed_listeners = aws_listeners.reject { |k, v| local_listeners.has_key? k }
  modified_listeners = local_listeners.select { |k, v| aws_listeners.has_key? k }

  added_diffs = Hash[added_listeners.map { |port, added| [port, ListenerDiff.added(added)] }]
  removed_diffs = Hash[removed_listeners.map { |port, removed| [port, ListenerDiff.unmanaged(removed)] }]
  modified_diffs = Hash[modified_listeners.map do |port, modified|
    [port, modified.diff(aws_listeners[port])]
  end].reject { |k, v| v.empty? }

  if !added_diffs.empty? or !removed_diffs.empty? or !modified_diffs.empty?
    diff = LoadBalancerDiff.new(LISTENERS, aws, local)
    diff.listeners = Common::ListChange.new(added_diffs, removed_diffs, modified_diffs)
    diff
  end
end

.security_groups(aws, local) ⇒ Object 



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# File 'lib/elb/models/LoadBalancerDiff.rb', line 73

def self.security_groups(aws, local)
  added = local - aws
  removed = aws - local
  diff = LoadBalancerDiff.new(SECURITY, aws, local)
  diff.security_groups = Common::ListChange.new(added, removed)
  diff
end

.subnets(aws, local) ⇒ Object 



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# File 'lib/elb/models/LoadBalancerDiff.rb', line 62

def self.subnets(aws, local)
  local_ids = local.map { |s| s.subnet_id }
  aws_ids = aws.map { |s| s.subnet_id }

  added = local.reject { |s| aws_ids.include? s.subnet_id }
  removed = aws.reject { |s| local_ids.include? s.subnet_id }
  diff = LoadBalancerDiff.new(SUBNETS, aws, local)
  diff.subnets = Common::ListChange.new(added, removed)
  diff
end

.tags(aws, local) ⇒ Object 



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# File 'lib/elb/models/LoadBalancerDiff.rb', line 86

def self.tags(aws, local)
  added = []
  removed = []
  modified = []

  aws.each_pair do |key, val|
    if local.has_key?(key)
      if local[key] != val
        modified << TagChange.new(key, val, local[key])
      end
    else
      removed << TagChange.new(key, val, nil)
    end
  end

  local.each_pair do |key, val|
    if !aws.has_key?(key)
      added << TagChange.new(key, nil, val)
    end
  end

  diff = LoadBalancerDiff.new(TAGS, aws, local)
  diff.tags = Common::ListChange.new(added, removed, modified)
  diff
end

Instance Method Details

#asset_type ⇒ Object 



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# File 'lib/elb/models/LoadBalancerDiff.rb', line 155

def asset_type
  "Load Balancer"
end

#aws_name ⇒ Object 



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# File 'lib/elb/models/LoadBalancerDiff.rb', line 159

def aws_name
  @aws.load_balancer_name
end

#diff_string ⇒ Object 



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# File 'lib/elb/models/LoadBalancerDiff.rb', line 163

def diff_string
  case @type
  when LISTENERS
    [
      "listeners:",
      @listeners.removed.map { |_, diff| "\t#{diff}" },
      @listeners.added.map { |_, diff| "\t#{diff}" },
      @listeners.modified.map do |port, diffs|
        [
          "\tListener for port #{port}:",
          diffs.map do |diff|
            diff.to_s.lines.map { |l| "\t\t#{l}".chomp("\n") }
          end
        ].join("\n")
      end
    ].flatten.join("\n")
  when SUBNETS
    [
      "subnets:",
      @subnets.removed.map { |s| Colors.removed("\t#{s.subnet_id} (#{s.name})") },
      @subnets.added.map { |s| Colors.added("\t#{s.subnet_id} (#{s.name})") },
    ].flatten.join("\n")
  when SECURITY
    [
      "security groups:",
      @security_groups.removed.map { |s| Colors.removed("\t#{s}") },
      @security_groups.added.map { |s| Colors.added("\t#{s}") },
    ].flatten.join("\n")
  when INTERNAL
    [
      "internal:",
      Colors.aws_changes("\tAWS - #{aws}"),
      Colors.local_changes("\tLocal - #{local}"),
    ].join("\n")
  when TAGS
    [
      "tags:",
      @tags.removed.map { |t| Colors.removed("\t#{t.key}: #{t.aws}") },
      @tags.added.map { |t| Colors.added("\t#{t.key}: #{t.local}") },
      @tags.modified.map do |t|
        [
          "\t#{t.key}:",
          Colors.aws_changes("(AWS) #{t.aws}"),
          Colors.local_changes("(Local) #{t.local}")
        ].join(" ")
      end
    ].flatten.join("\n")
  when INSTANCES
    [
      "managed instances:",
      @instances.removed.map { |i| Colors.removed("\t#{i}") },
      @instances.added.map { |i| Colors.added("\t#{i}") },
    ].flatten.join("\n")
  when HEALTH
    [
      "health check:",
      @health_diffs.map do |d|
        d.to_s.lines.map { |l| "\t#{l}".chomp("\n") }
      end
    ].join("\n")
  when BACKEND
    [
      "backend policies:",
      @backend_policies.removed.map { |bc| Colors.removed("\tinstance port #{bc.port}: #{bc.aws_policies.join(" ")}") },
      @backend_policies.added.map { |bc| Colors.added("\tinstance port #{bc.port}: #{bc.local_policies.join(" ")}") },
      @backend_policies.modified.map do |bc|
        [
          "\tinstance port #{bc.port}:",
          (bc.aws_policies - bc.local_policies).map { |p| Colors.removed("#{p}") },
          (bc.local_policies - bc.aws_policies).map { |p| Colors.added("#{p}") },
        ].flatten.join(" ")
      end
    ].flatten.join("\n")
  when CROSS
    [
      "cross zone load balancing:",
      Colors.aws_changes("\tAWS - #{aws}"),
      Colors.local_changes("\tLocal - #{local}"),
    ].flatten.join("\n")
  when LOG
    [
      "access log:",
      @log_diffs.map do |d|
        d.to_s.lines.map { |l| "\t#{l}".chomp("\n") }
      end
    ].join("\n")
  when DRAINING
    [
      "connection draining:",
      Colors.aws_changes("\tAWS - #{aws}"),
      Colors.local_changes("\tLocal - #{local}"),
    ].join("\n")
  when IDLE
    [
      "idle timeout:",
      Colors.aws_changes("\tAWS - #{aws}"),
      Colors.local_changes("\tLocal - #{local}"),
    ].join("\n")
  end
end