harvester-ui-extension/pkg/harvester/validators/volume.js

export function volumeSize(size, getters, errors, validatorArgs, displayKey, value) {
  if (!size) {
    const key = getters['i18n/t']('harvester.volume.size');

    errors.push(getters['i18n/t']('validation.required', { key }));
  }

  if (size && !/^([0-9][0-9]{0,8})[a-zA-Z]+$/.test(size)) {
    const message = getters['i18n/t']('harvester.validation.generic.maximumSize', { max: '999999999 GiB' });

    errors.push(message);
  }

  return errors;
}