184 lines
6.2 KiB
Python
184 lines
6.2 KiB
Python
import decimal
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import logging
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import subprocess
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from oca.pool import WrongIdError
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from datacenterlight.models import VMPricing
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from hosting.models import UserHostingKey, VMDetail, VATRates
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from opennebula_api.serializers import VirtualMachineSerializer
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logger = logging.getLogger(__name__)
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def get_all_public_keys(customer):
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"""
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Returns all the public keys of the user
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:param customer: The customer whose public keys are needed
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:return: A list of public keys
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"""
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return UserHostingKey.objects.filter(user_id=customer.id).values_list(
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"public_key", flat=True).distinct()
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def get_or_create_vm_detail(user, manager, vm_id):
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"""
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Returns VMDetail object related to given vm_id. Creates the object
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if it does not exist
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:param vm_id: The ID of the VM which should be greater than 0.
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:param user: The CustomUser object that owns this VM
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:param manager: The OpenNebulaManager object
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:return: The VMDetail object. None if vm_id is less than or equal to 0.
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Also, for the cases where the VMDetail does not exist and we can not
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fetch data about the VM from OpenNebula, the function returns None
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"""
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if vm_id <= 0:
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return None
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try:
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vm_detail_obj = VMDetail.objects.get(vm_id=vm_id)
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except VMDetail.DoesNotExist:
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try:
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vm_obj = manager.get_vm(vm_id)
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except (WrongIdError, ConnectionRefusedError) as e:
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logger.error(str(e))
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return None
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vm = VirtualMachineSerializer(vm_obj).data
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vm_detail_obj = VMDetail.objects.create(
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user=user, vm_id=vm_id, disk_size=vm['disk_size'],
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cores=vm['cores'], memory=vm['memory'],
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configuration=vm['configuration'], ipv4=vm['ipv4'],
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ipv6=vm['ipv6']
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)
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return vm_detail_obj
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def get_vm_price(cpu, memory, disk_size, hdd_size=0, pricing_name='default'):
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"""
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A helper function that computes price of a VM from given cpu, ram and
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ssd parameters
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:param cpu: Number of cores of the VM
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:param memory: RAM of the VM
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:param disk_size: Disk space of the VM (SSD)
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:param hdd_size: The HDD size
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:param pricing_name: The pricing name to be used
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:return: The price of the VM
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"""
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try:
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pricing = VMPricing.objects.get(name=pricing_name)
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except Exception as ex:
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logger.error(
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"Error getting VMPricing object for {pricing_name}."
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"Details: {details}".format(
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pricing_name=pricing_name, details=str(ex)
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)
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)
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return None
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price = ((decimal.Decimal(cpu) * pricing.cores_unit_price) +
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(decimal.Decimal(memory) * pricing.ram_unit_price) +
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(decimal.Decimal(disk_size) * pricing.ssd_unit_price) +
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(decimal.Decimal(hdd_size) * pricing.hdd_unit_price))
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cents = decimal.Decimal('.01')
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price = price.quantize(cents, decimal.ROUND_HALF_UP)
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return round(float(price), 2)
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def get_vm_price_with_vat(cpu, memory, ssd_size, hdd_size=0,
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pricing_name='default'):
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"""
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A helper function that computes price of a VM from given cpu, ram and
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ssd, hdd and the pricing parameters
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:param cpu: Number of cores of the VM
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:param memory: RAM of the VM
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:param ssd_size: Disk space of the VM (SSD)
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:param hdd_size: The HDD size
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:param pricing_name: The pricing name to be used
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:return: The a tuple containing the price of the VM, the VAT and the
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VAT percentage
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"""
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try:
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pricing = VMPricing.objects.get(name=pricing_name)
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except Exception as ex:
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logger.error(
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"Error getting VMPricing object for {pricing_name}."
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"Details: {details}".format(
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pricing_name=pricing_name, details=str(ex)
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)
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)
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return None
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price = (
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(decimal.Decimal(cpu) * pricing.cores_unit_price) +
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(decimal.Decimal(memory) * pricing.ram_unit_price) +
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(decimal.Decimal(ssd_size) * pricing.ssd_unit_price) +
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(decimal.Decimal(hdd_size) * pricing.hdd_unit_price)
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)
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if pricing.vat_inclusive:
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vat = decimal.Decimal(0)
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vat_percent = decimal.Decimal(0)
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else:
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vat = price * pricing.vat_percentage * decimal.Decimal(0.01)
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vat_percent = pricing.vat_percentage
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cents = decimal.Decimal('.01')
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price = price.quantize(cents, decimal.ROUND_HALF_UP)
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vat = vat.quantize(cents, decimal.ROUND_HALF_UP)
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discount = {
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'name': pricing.discount_name,
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'amount': round(float(pricing.discount_amount), 2)
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}
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return (round(float(price), 2), round(float(vat), 2),
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round(float(vat_percent), 2), discount)
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def ping_ok(host_ipv6):
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"""
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A utility method to check if a host responds to ping requests. Note: the
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function relies on `ping6` utility of debian to check.
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:param host_ipv6 str type parameter that represets the ipv6 of the host to
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checked
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:return True if the host responds to ping else returns False
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"""
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try:
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subprocess.check_output("ping6 -c 1 " + host_ipv6, shell=True)
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except Exception as ex:
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logger.debug(host_ipv6 + " not reachable via ping. Error = " + str(ex))
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return False
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return True
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def get_vat_rate_for_country(country):
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vat_rate = None
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try:
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vat_rate = VATRates.objects.get(
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territory_codes=country, start_date__isnull=False, stop_date=None
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)
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logger.debug("VAT rate for %s is %s" % (country, vat_rate.rate))
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return vat_rate.rate
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except VATRates.DoesNotExist as dne:
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logger.debug(str(dne))
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logger.debug("Did not find VAT rate for %s, returning 0" % country)
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return 0
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class HostingUtils:
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@staticmethod
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def clear_items_from_list(from_list, items_list):
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"""
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A utility function to clear items from a given list.
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Useful when deleting items in bulk from session.
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e.g.:
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HostingUtils.clear_items_from_list(
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request.session,
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['token', 'billing_address_data', 'card_id',]
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)
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:param from_list:
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:param items_list:
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:return:
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"""
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for var in items_list:
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if var in from_list:
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del from_list[var]
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