Contêineres (especificamente contêineres Linux) são um jeito muito **leve** de empacotar aplicações contendo todas as dependências e arquivos necessários enquanto os mantém isolados de outros contêineres (outras aplicações ou componentes) no mesmo sistema.

    if (bubbledTo == vacated) {
      // Could not bubble toTrickle up min levels, try moving
      // it from min level to max level (or max to min level) and bubble up
      // there.
      return heap.tryCrossOverAndBubbleUp(index, vacated, toTrickle);
    } else {
      return (bubbledTo < index) ? new MoveDesc<E>(toTrickle, elementData(index)) : null;
    }
  }

	return cmd
}

// Level is an enumeration of all supported log levels.
type Level int

const (
	defaultLoggerName = "level"
)

const (
	// OffLevel disables logging
	OffLevel Level = iota
	// CriticalLevel enables critical level logging
	CriticalLevel
	// ErrorLevel enables error level logging
	ErrorLevel
	// WarningLevel enables warning level logging
	WarningLevel

		Use:   "log [<pod-name>]|[-r|--revision] [--level <scope>:<level>][--stack-trace-level <scope>:<level>]|[--reset]|[--output|-o short|json|yaml]",
		Short: "Manage istiod logging.",
		Long:  "Retrieve or update logging levels of istiod components.",
		Example: `  # Retrieve information about istiod logging levels.
  istioctl admin log

  # Retrieve information about istiod logging levels on a specific control plane pod.

     *
     * @param level the severity level of the message
     * @param message the message to be logged
     */
    default void log(@Nonnull Level level, @Nonnull String message) {
        log(level, message, null);
    }

    /**
     * Logs a message at the specified level with an associated exception.
     *
     * @param level the severity level of the message

    if (bubbledTo == vacated) {
      // Could not bubble toTrickle up min levels, try moving
      // it from min level to max level (or max to min level) and bubble up
      // there.
      return heap.tryCrossOverAndBubbleUp(index, vacated, toTrickle);
    } else {
      return (bubbledTo < index) ? new MoveDesc<E>(toTrickle, elementData(index)) : null;
    }
  }

  // as well as requests dispatched from other priority levels
  // borrowing seats from this level.
  // The server's concurrency limit (ServerCL) is divided among the
  // Limited priority levels in proportion to their NCS values:
  //
  // NominalCL(i)  = ceil( ServerCL * NCS(i) / sum_ncs )
  // sum_ncs = sum[limited priority level k] NCS(k)
  //
  // Bigger numbers mean a larger nominal concurrency limit,

  // (and thus are never queued) and do not detract from the
  // capacity made available to other priority levels.  A value of
  // `"Limited"` means that (a) requests of this priority level
  // _are_ subject to limits and (b) some of the server's limited
  // capacity is made available exclusively to this priority level.
  // Required.
  // +unionDiscriminator
  optional string type = 1;

	labelSelector = ""
	loggerName    string
)

// Level is an enumeration of all supported log levels.
type Level int

const (
	defaultLoggerName       = "level"
	defaultEnvoyOutputLevel = WarningLevel
)

const (
	// OffLevel disables logging
	OffLevel Level = iota
	// CriticalLevel enables critical level logging
	CriticalLevel
	// ErrorLevel enables error level logging
	ErrorLevel

  // (and thus are never queued) and do not detract from the
  // capacity made available to other priority levels.  A value of
  // `"Limited"` means that (a) requests of this priority level
  // _are_ subject to limits and (b) some of the server's limited
  // capacity is made available exclusively to this priority level.
  // Required.
  // +unionDiscriminator
  optional string type = 1;