Class: Sfn::Command::Inspect

Inherits:
Sfn::Command
  • Object
show all
Includes:
Sfn::CommandModule::Base, Utils::Ssher
Defined in:
lib/sfn/command/inspect.rb

Overview

Inspect command

Constant Summary

Constants inherited from Sfn::Command

CONFIG_BASE_NAME, VALID_CONFIG_EXTENSIONS

Instance Method Summary collapse

Methods included from Utils::Ssher

#remote_file_contents

Methods included from Sfn::CommandModule::Base

included

Methods inherited from Sfn::Command

#config, #initialize

Methods included from Sfn::CommandModule::Callbacks

#api_action!, #callbacks_for, #run_callbacks_for

Constructor Details

This class inherits a constructor from Sfn::Command

Instance Method Details

#display_attribute(stack) ⇒ Object 



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# File 'lib/sfn/command/inspect.rb', line 94

def display_attribute(stack)
  [config[:attribute]].flatten.compact.each do |stack_attribute|
    attr = stack_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.puts MultiJson.dump(
      MultiJson.load(
        MultiJson.dump(attr)
      ),
      :pretty => true,
    )
  end
end

#display_instance_failure(stack) ⇒ Object 



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# File 'lib/sfn/command/inspect.rb', line 35

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 = config[: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_load_balancers(stack) ⇒ Object 



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# File 'lib/sfn/command/inspect.rb', line 164

def display_load_balancers(stack)
  load_balancers = Smash[
    stack.resources.all.find_all do |resource|
      resource.within?(:load_balancer, :balancers)
    end.map do |lb|
      exp_lb = lb.expand
      lb_pub_addrs = exp_lb.public_addresses.nil? ? nil : exp_lb.public_addresses.map(&:address)
      lb_priv_addrs = exp_lb.private_addresses.nil? ? nil : exp_lb.private_addresses.map(&:address)
      [lb.id, Smash.new(
        :name => exp_lb.name,
        :state => exp_lb.state,
        :public_addresses => lb_pub_addrs,
        :private_addresses => lb_priv_addrs,
        :server_states => exp_lb.server_states,
      ).delete_if { |k, v| v.nil? }]
    end
  ]
  unless load_balancers.empty?
    ui.info "  Load Balancer Instances:"
    ui.puts MultiJson.dump(load_balancers, :pretty => true)
  end
end

#display_nodes(stack) ⇒ Object 



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# File 'lib/sfn/command/inspect.rb', line 122

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).compact.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
      if srv
        [srv.id, Smash.new(
          :name => srv.name,
          :addresses => srv.addresses.map(&:address),
        )]
      end
    end.compact
  ]
  unless asg_nodes.empty?
    ui.info "  AutoScale Group Instances:"
    ui.puts MultiJson.dump(asg_nodes, :pretty => true)
  end
  unless compute_nodes.empty?
    ui.info "  Compute Instances:"
    ui.puts MultiJson.dump(compute_nodes, :pretty => true)
  end
end

#execute! ⇒ Object

Run the stack inspection action



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# File 'lib/sfn/command/inspect.rb', line 11

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

#ssh_attempt_users ⇒ Array<String>

Users to attempt SSH connection

Returns:

  • (Array<String>) —

    usernames for ssh connect attempt



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# File 'lib/sfn/command/inspect.rb', line 86

def ssh_attempt_users
  [config[:ssh_user], config[:ssh_attempt_users], ENV["USER"]].flatten.compact.uniq
end

#ssh_key ⇒ Object 



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# File 'lib/sfn/command/inspect.rb', line 90

def ssh_key
  config[:identity_file]
end