Class: Chef::Knife::CloudformationInspect

Inherits:
Chef::Knife
  • Object
show all
Includes:
KnifeCloudformation::Knife::Base, KnifeCloudformation::Utils::Ssher
Defined in:
lib/chef/knife/cloudformation_inspect.rb

Overview

Cloudformation inspect command

Instance Method Summary collapse

Methods included from KnifeCloudformation::Utils::Ssher

#remote_file_contents

Methods included from KnifeCloudformation::Knife::Base

included

Instance Method Details

#_run ⇒ Object

Run the stack inspection action



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# File 'lib/chef/knife/cloudformation_inspect.rb', line 54

def _run
  stack_name = name_args.last
  stack = provider.connection.stacks.get(stack_name)
  ui.info "Stack inspection #{ui.color(stack_name, :bold)}:"
  outputs = [:attribute, :nodes, :instance_failure].map do |key|
    if(config.has_key?(key))
      send("display_#{key}", stack)
      key
    end
  end.compact
  if(outputs.empty?)
    ui.info '  Stack dump:'
    ui.info MultiJson.dump(
      MultiJson.load(
        stack.reload.to_json
      ),
      :pretty => true
    )
  end
end

#display_attribute(stack) ⇒ Object 



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# File 'lib/chef/knife/cloudformation_inspect.rb', line 138

def display_attribute(stack)
  attr = config[:attribute].split('.').inject(stack) do |memo, key|
    args = key.scan(/\(([^)]*)\)/).flatten.first.to_s
    if(args)
      args = args.split(',').map{|a| a.to_i.to_s == a ? a.to_i : a}
      key = key.split('(').first
    end
    if(memo.public_methods.include?(key.to_sym))
      if(args.size == 1 && args.first.to_s.start_with?('&'))
        memo.send(key, &args.first.slice(2, args.first.size).to_sym)
      else
        memo.send(*[key, args].flatten.compact)
      end
    else
      raise NoMethodError.new "Invalid attribute requested! (#{memo.class}##{key})"
    end
  end
  ui.info "  Attribute Lookup -> #{config[:attribute]}:"
  ui.info MultiJson.dump(
    MultiJson.load(
      MultiJson.dump(attr)
    ),
    :pretty => true
  )
end

#display_instance_failure(stack) ⇒ Object 



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# File 'lib/chef/knife/cloudformation_inspect.rb', line 75

def display_instance_failure(stack)
  instances = stack.resources.all.find_all do |resource|
    resource.state.to_s.end_with?('failed')
  end.map do |resource|
    # If compute instance, simply expand
    if(resource.within?(:compute, :servers))
      resource.instance
    # If a waitcondition, check for instance ID
    elsif(resource.type.to_s.downcase.end_with?('waitcondition'))
      if(resource.status_reason.to_s.include?('uniqueId'))
        srv_id = resource.status_reason.split(' ').last.strip
        provider.connection.api_for(:compute).servers.get(srv_id)
      end
    end
  end.compact
  if(instances.empty?)
    ui.error 'Failed to locate any failed instances'
  else
    log_path = Chef::Config[:knife][:cloudformation][:failure_log_path]
    if(log_path.to_s.empty?)
      log_path = '/var/log/chef/client.log'
    end
    opts = ssh_key ? {:keys => [ssh_key]} : {}
    instances.each do |instance|
      ui.info "  -> Log inspect for #{instance.id}:"
      address = instance.addresses_public.map do |address|
        if(address.version == 4)
          address.address
        end
      end
      if(address)
        ssh_attempt_users.each do |user|
          begin
            ui.info remote_file_contents(address.first, user, log_path, opts)
            break
          rescue Net::SSH::AuthenticationFailed
            ui.warn "Authentication failed for user #{user} on instance #{address}"
          rescue => e
            ui.error "Failed to retrieve log: #{e}"
            _debug e
            break
          end
        end
      end
    end
  end
end

#display_nodes(stack) ⇒ Object 



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# File 'lib/chef/knife/cloudformation_inspect.rb', line 164

def display_nodes(stack)
  asg_nodes = Smash[
    stack.resources.all.find_all do |resource|
      resource.within?(:auto_scale, :groups)
    end.map do |group_resource|
      asg = group_resource.expand
      [
        asg.name,
        Smash[
          asg.servers.map(&:expand).map{|s|
            [s.id, Smash.new(
                :name => s.name,
                :addresses => s.addresses.map(&:address)
            )]
          }
        ]
      ]
    end
  ]
  compute_nodes = Smash[
    stack.resources.all.find_all do |resource|
      resource.within?(:compute, :servers)
    end.map do |srv|
      srv = srv.instance
      [srv.id, Smash.new(
          :name => srv.name,
          :addresses => srv.addresses.map(&:address)
      )]
    end
  ]
  unless(asg_nodes.empty?)
    ui.info '  AutoScale Group Instances:'
    ui.info MultiJson.dump(asg_nodes, :pretty => true)
  end
  unless(compute_nodes.empty?)
    ui.info '  Compute Instances:'
    ui.info MultiJson.dump(compute_nodes, :pretty => true)
  end
end

#ssh_attempt_users ⇒ Array<String>

Users to attempt SSH connection



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# File 'lib/chef/knife/cloudformation_inspect.rb', line 126

def ssh_attempt_users
  base_user = Chef::Config[:knife][:cloudformation][:ssh_user] ||
    Chef::Config[:knife][:ssh_user] ||
    ENV['USER']
  [base_user, Chef::Config[:knife][:cloudformation][:ssh_attempt_users]].flatten.compact
end

#ssh_key ⇒ Object 



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# File 'lib/chef/knife/cloudformation_inspect.rb', line 133

def ssh_key
  Chef::Config[:knife][:cloudformation][:identity_file] ||
    Chef::Config[:knife][:identity_file]
end