Class: Pvectl::Services::SetContainer

Inherits:
Object
  • Object
show all
Defined in:
lib/pvectl/services/set_container.rb,
sig/pvectl/services/set_container.rbs

Overview

Orchestrates non-interactive container configuration updates.

Takes key-value pairs directly (no editor), computes diff against current config, and applies changes via the API. Supports dry-run mode and optimistic locking via digest.

Examples:

Basic usage

service = SetContainer.new(container_repository: repo)
result = service.execute(ctid: 200, params: { memory: "8192", cores: "4" })

Dry run

service = SetContainer.new(container_repository: repo, options: { dry_run: true })
result = service.execute(ctid: 200, params: { memory: "8192" })

Instance Method Summary collapse

Constructor Details

#initialize(container_repository:, options: {}) ⇒ SetContainer

Creates a new SetContainer service.



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# File 'lib/pvectl/services/set_container.rb', line 24

def initialize(container_repository:, options: {})
  @container_repository = container_repository
  @options = options
end

Instance Method Details

#build_result(resource_info, **attrs) ⇒ Models::ContainerOperationResult

Builds a ContainerOperationResult with the :set operation.



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# File 'lib/pvectl/services/set_container.rb', line 112

def build_result(resource_info, **attrs)
  container = Models::Container.new(vmid: resource_info[:vmid], node: resource_info[:node])
  Models::ContainerOperationResult.new(
    operation: :set, container: container, resource: resource_info, **attrs
  )
end

#build_update_params(changes, original_config) ⇒ Hash

Builds API update parameters from diff.

Maps changed/added keys to their new values and includes digest from original config for optimistic locking.



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# File 'lib/pvectl/services/set_container.rb', line 99

def build_update_params(changes, original_config)
  params = {}
  changes[:changed].each { |key, (_old, new_val)| params[key] = new_val }
  changes[:added].each { |key, val| params[key] = val }
  params[:digest] = original_config[:digest] if original_config[:digest]
  params
end

#compute_diff(config, params) ⇒ Hash

Computes diff between current config and requested params.

Categorizes each requested param as :changed (value differs), :added (key not in current config), or unchanged (skipped).



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# File 'lib/pvectl/services/set_container.rb', line 73

def compute_diff(config, params)
  changed = {}
  added = {}

  params.each do |key, value|
    sym_key = key.to_sym
    current = config[sym_key]

    if current.nil?
      added[sym_key] = value
    elsif current.to_s != value.to_s
      changed[sym_key] = [current.to_s, value.to_s]
    end
  end

  { changed: changed, added: added, removed: [] }
end

#execute(ctid:, params:) ⇒ Models::ContainerOperationResult?

Executes the non-interactive container config update.

Fetches current config, computes diff against requested params, and applies changes via the API (unless dry-run).



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# File 'lib/pvectl/services/set_container.rb', line 37

def execute(ctid:, params:)
  container = @container_repository.get(ctid)
  return not_found_result(ctid) unless container

  config = @container_repository.fetch_config(container.node, ctid)
  resource_info = { vmid: ctid, node: container.node, status: container.status }

  changes = compute_diff(config, params)

  if changes[:changed].empty? && changes[:added].empty? && changes[:removed].empty?
    return nil
  end

  resource_info[:diff] = changes

  if @options[:dry_run]
    return build_result(resource_info, success: true)
  end

  update_params = build_update_params(changes, config)
  @container_repository.update(ctid, container.node, update_params)
  build_result(resource_info, success: true)
rescue StandardError => e
  build_result({ vmid: ctid }, success: false, error: e.message)
end

#not_found_result(ctid) ⇒ Models::ContainerOperationResult

Builds a not-found error result.



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# File 'lib/pvectl/services/set_container.rb', line 123

def not_found_result(ctid)
  build_result({ vmid: ctid }, success: false, error: "Container #{ctid} not found")
end