Class: Kdep::Commands::Scale

Inherits:
Object
  • Object
show all
Defined in:
lib/kdep/commands/scale.rb

Constant Summary collapse

NON_SCALABLE_PRESETS = 
%w[job cronjob].freeze

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(global_options:, command_options:, args:) ⇒ Scale

Returns a new instance of Scale.



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# File 'lib/kdep/commands/scale.rb', line 20

def initialize(global_options:, command_options:, args:)
  @global_options = global_options
  @command_options = command_options
  @args = args
  @ui = Kdep::UI.new(color: false)
end

Class Method Details

.option_parser ⇒ Object 



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# File 'lib/kdep/commands/scale.rb', line 8

def self.option_parser
  OptionParser.new do |opts|
    opts.banner = "Usage: kdep scale [deploy] N [--type TYPE]"
    opts.separator ""
    opts.separator "Scales a Deployment or StatefulSet to N replicas."
    opts.separator ""
    opts.on("--type TYPE", "Resource type: deployment, statefulset (overrides preset)") do |_|
      # parsed via into: hash
    end
  end
end

Instance Method Details

#execute ⇒ Object 



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# File 'lib/kdep/commands/scale.rb', line 27

def execute
  if @args.length == 1 && @args[0] && @args[0].match?(/\A\d+\z/)
    deploy_name = nil
    @replica_count = @args[0].to_i
  else
    deploy_name = @args[0]
  end

  # Discover kdep/ directory
  discovery = Kdep::Discovery.new
  kdep_dir = discovery.find_kdep_dir
  unless kdep_dir
    @ui.error("No kdep/ directory found")
    exit 1
  end

  # Resolve deploy directory
  deploy_dir = resolve_deploy_dir(kdep_dir, deploy_name, discovery)
  unless deploy_dir
    exit 1
  end

  # Load config
  config = Kdep::Config.new(deploy_dir, nil).load

  # Validate context before any cluster operation
  begin
    Kdep::ContextGuard.new(config["context"]).validate!
  rescue Kdep::Kubectl::Error => e
    @ui.error(e.message)
    exit 1
  end

  namespace = config["namespace"]
  app_name = config["name"]
  preset = config["preset"]

  # Parse and validate replica count
  replicas = parse_replicas
  unless replicas
    @ui.error("Usage: kdep scale [deploy] N -- replica count required")
    exit 1
  end

  # Determine resource type
  resource_type = determine_resource_type(preset)

  # Execute scale
  Kdep::Kubectl.run("scale", "#{resource_type}/#{app_name}", "--replicas=#{replicas}", "-n", namespace)
  @ui.info("Scaled #{resource_type}/#{app_name} to #{replicas} replicas in #{namespace}")
end