492 lines
17 KiB
Python
492 lines
17 KiB
Python
import oca
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import socket
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import logging
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from oca.pool import WrongNameError, WrongIdError
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from oca.exceptions import OpenNebulaException
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from django.conf import settings
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from utils.models import CustomUser
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from .exceptions import KeyExistsError, UserExistsError, UserCredentialError
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logger = logging.getLogger(__name__)
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class OpenNebulaManager():
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"""This class represents an opennebula manager."""
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def __init__(self, email=None, password=None):
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# Get oneadmin client
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self.oneadmin_client = self._get_opennebula_client(
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settings.OPENNEBULA_USERNAME,
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settings.OPENNEBULA_PASSWORD
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)
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# Get or create oppenebula user using given credentials
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try:
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self.opennebula_user = self._get_or_create_user(
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email,
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password
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)
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# If opennebula user was created/obtained, get his client
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self.client = self._get_opennebula_client(
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email,
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password
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)
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except:
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pass
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def _get_client(self, user):
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"""Get a opennebula client object for a CustomUser object
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Args:
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user (CustomUser): dynamicweb CustomUser object
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Returns:
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oca.Client: Opennebula client object
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Raise:
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ConnectionError: If the connection to the opennebula server can't be
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established
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"""
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return oca.Client("{0}:{1}".format(
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user.email,
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user.password),
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"{protocol}://{domain}:{port}{endpoint}".format(
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protocol=settings.OPENNEBULA_PROTOCOL,
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domain=settings.OPENNEBULA_DOMAIN,
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port=settings.OPENNEBULA_PORT,
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endpoint=settings.OPENNEBULA_ENDPOINT
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))
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def _get_opennebula_client(self, username, password):
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return oca.Client("{0}:{1}".format(
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username,
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password),
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"{protocol}://{domain}:{port}{endpoint}".format(
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protocol=settings.OPENNEBULA_PROTOCOL,
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domain=settings.OPENNEBULA_DOMAIN,
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port=settings.OPENNEBULA_PORT,
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endpoint=settings.OPENNEBULA_ENDPOINT
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))
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def _get_user(self, user):
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"""Get the corresponding opennebula user for a CustomUser object
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Args:
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user (CustomUser): dynamicweb CustomUser object
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Returns:
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oca.User: Opennebula user object
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Raise:
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WrongNameError: If no openebula user with this credentials exists
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ConnectionError: If the connection to the opennebula server can't be
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established
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"""
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user_pool = self._get_user_pool()
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return user_pool.get_by_name(user.email)
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def create_user(self, user: CustomUser):
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"""Create a new opennebula user or a corresponding CustomUser object
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Args:
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user (CustomUser): dynamicweb CustomUser object
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Returns:
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int: Return the opennebula user id
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Raises:
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ConnectionError: If the connection to the opennebula server can't be
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established
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UserExistsError: If a user with this credeintals already exits on the
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server
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UserCredentialError: If a user with this email exists but the
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password is worng
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"""
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try:
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self._get_user(user)
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try:
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self._get_client(self, user)
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logger.debug('User already exists')
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raise UserExistsError()
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except OpenNebulaException as err:
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logger.error('OpenNebulaException error: {0}'.format(err))
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logger.debug('User exists but password is wrong')
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raise UserCredentialError()
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except WrongNameError:
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user_id = self.oneadmin_client.call(oca.User.METHODS['allocate'],
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user.email, user.password, 'core')
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logger.debug('Created a user for CustomObject: {user} with user id = {u_id}',
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user=user,
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u_id=user_id
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)
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return user_id
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except ConnectionRefusedError:
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logger.error('Could not connect to host: {host} via protocol {protocol}'.format(
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host=settings.OPENNEBULA_DOMAIN,
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protocol=settings.OPENNEBULA_PROTOCOL)
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)
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raise ConnectionRefusedError
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def _get_or_create_user(self, email, password):
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try:
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user_pool = self._get_user_pool()
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opennebula_user = user_pool.get_by_name(email)
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return opennebula_user
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except WrongNameError as wrong_name_err:
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opennebula_user = self.oneadmin_client.call(oca.User.METHODS['allocate'], email,
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password, 'core')
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logger.debug(
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"User {0} does not exist. Created the user. User id = {1}",
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email,
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opennebula_user
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)
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return opennebula_user
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except ConnectionRefusedError:
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logger.info('Could not connect to host: {host} via protocol {protocol}'.format(
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host=settings.OPENNEBULA_DOMAIN,
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protocol=settings.OPENNEBULA_PROTOCOL)
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)
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raise ConnectionRefusedError
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def _get_user_pool(self):
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try:
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user_pool = oca.UserPool(self.oneadmin_client)
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user_pool.info()
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except ConnectionRefusedError:
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logger.info('Could not connect to host: {host} via protocol {protocol}'.format(
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host=settings.OPENNEBULA_DOMAIN,
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protocol=settings.OPENNEBULA_PROTOCOL)
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)
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raise
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return user_pool
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def _get_vm_pool(self):
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try:
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vm_pool = oca.VirtualMachinePool(self.client)
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vm_pool.info()
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return vm_pool
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except AttributeError:
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logger.info('Could not connect via client, using oneadmin instead')
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try:
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vm_pool = oca.VirtualMachinePool(self.oneadmin_client)
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vm_pool.info(filter=-2)
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return vm_pool
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except:
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raise ConnectionRefusedError
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except ConnectionRefusedError:
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logger.info('Could not connect to host: {host} via protocol {protocol}'.format(
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host=settings.OPENNEBULA_DOMAIN,
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protocol=settings.OPENNEBULA_PROTOCOL)
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)
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raise ConnectionRefusedError
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# For now we'll just handle all other errors as connection errors
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except:
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raise ConnectionRefusedError
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def get_vms(self):
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try:
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return self._get_vm_pool()
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except ConnectionRefusedError:
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raise ConnectionRefusedError
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def get_vm(self, vm_id):
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vm_id = int(vm_id)
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try:
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vm_pool = self._get_vm_pool()
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return vm_pool.get_by_id(vm_id)
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except WrongIdError:
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raise WrongIdError
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except:
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raise ConnectionRefusedError
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def create_vm(self, template_id, specs, ssh_key=None, vm_name=None):
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template = self.get_template(template_id)
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vm_specs_formatter = """<TEMPLATE>
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<MEMORY>{memory}</MEMORY>
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<VCPU>{vcpu}</VCPU>
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<CPU>{cpu}</CPU>
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"""
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try:
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disk = template.template.disks[0]
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image_id = disk.image_id
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vm_specs = vm_specs_formatter.format(
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vcpu=int(specs['cpu']),
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cpu=0.1 * int(specs['cpu']),
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memory=1024 * int(specs['memory']),
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)
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vm_specs += """<DISK>
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<TYPE>fs</TYPE>
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<SIZE>{size}</SIZE>
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<DEV_PREFIX>vd</DEV_PREFIX>
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<IMAGE_ID>{image_id}</IMAGE_ID>
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</DISK>
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""".format(size=1024 * int(specs['disk_size']),
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image_id=image_id)
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except:
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disk = template.template.disks[0]
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image = disk.image
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image_uname = disk.image_uname
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vm_specs = vm_specs_formatter.format(
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vcpu=int(specs['cpu']),
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cpu=0.1 * int(specs['cpu']),
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memory=1024 * int(specs['memory']),
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)
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vm_specs += """<DISK>
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<TYPE>fs</TYPE>
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<SIZE>{size}</SIZE>
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<DEV_PREFIX>vd</DEV_PREFIX>
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<IMAGE>{image}</IMAGE>
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<IMAGE_UNAME>{image_uname}</IMAGE_UNAME>
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</DISK>
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""".format(size=1024 * int(specs['disk_size']),
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image=image,
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image_uname=image_uname)
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vm_specs += "<CONTEXT>"
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if ssh_key:
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vm_specs += "<SSH_PUBLIC_KEY>{ssh}</SSH_PUBLIC_KEY>".format(ssh=ssh_key)
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vm_specs += """<NETWORK>YES</NETWORK>
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</CONTEXT>
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</TEMPLATE>
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"""
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vm_id = self.client.call(oca.VmTemplate.METHODS['instantiate'],
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template.id,
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'',
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True,
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vm_specs,
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False)
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self.oneadmin_client.call(
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oca.VirtualMachine.METHODS['action'],
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'release',
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vm_id
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)
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if vm_name is not None:
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self.oneadmin_client.call(
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'vm.rename',
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vm_id,
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vm_name
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)
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return vm_id
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def delete_vm(self, vm_id):
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TERMINATE_ACTION = 'terminate'
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vm_terminated = False
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try:
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self.oneadmin_client.call(
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oca.VirtualMachine.METHODS['action'],
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TERMINATE_ACTION,
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int(vm_id),
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)
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vm_terminated = True
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except socket.timeout as socket_err:
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logger.info("Socket timeout error: {0}".format(socket_err))
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except OpenNebulaException as opennebula_err:
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logger.info(
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"OpenNebulaException error: {0}".format(opennebula_err))
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except OSError as os_err:
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logger.info("OSError : {0}".format(os_err))
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except ValueError as value_err:
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logger.info("ValueError : {0}".format(value_err))
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return vm_terminated
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def _get_template_pool(self):
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try:
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template_pool = oca.VmTemplatePool(self.oneadmin_client)
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template_pool.info()
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return template_pool
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except ConnectionRefusedError:
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logger.info('Could not connect to host: {host} via protocol {protocol}'.format(
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host=settings.OPENNEBULA_DOMAIN,
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protocol=settings.OPENNEBULA_PROTOCOL)
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)
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raise ConnectionRefusedError
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except:
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raise ConnectionRefusedError
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def get_templates(self):
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try:
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public_templates = [
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template
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for template in self._get_template_pool()
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if template.name.startswith('public-')
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]
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return public_templates
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except ConnectionRefusedError:
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raise ConnectionRefusedError
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except:
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raise ConnectionRefusedError
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def try_get_templates(self):
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try:
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return self.get_templates()
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except:
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return []
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def get_template(self, template_id):
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template_id = int(template_id)
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try:
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template_pool = self._get_template_pool()
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return template_pool.get_by_id(template_id)
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except:
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raise ConnectionRefusedError
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def create_template(self, name, cores, memory, disk_size, core_price, memory_price,
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disk_size_price, ssh=''):
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"""Create and add a new template to opennebula.
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:param name: A string representation describing the template.
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Used as label in view.
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:param cores: Amount of virtual cpu cores for the VM.
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:param memory: Amount of RAM for the VM (GB)
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:param disk_size: Amount of disk space for VM (GB)
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:param core_price: Price of virtual cpu for the VM per core.
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:param memory_price: Price of RAM for the VM per GB
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:param disk_size_price: Price of disk space for VM per GB
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:param ssh: User public ssh key
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"""
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template_string_formatter = """<TEMPLATE>
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<NAME>{name}</NAME>
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<MEMORY>{memory}</MEMORY>
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<VCPU>{vcpu}</VCPU>
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<CPU>{cpu}</CPU>
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<DISK>
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<TYPE>fs</TYPE>
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<SIZE>{size}</SIZE>
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<DEV_PREFIX>vd</DEV_PREFIX>
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</DISK>
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<CPU_COST>{cpu_cost}</CPU_COST>
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<MEMORY_COST>{memory_cost}</MEMORY_COST>
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<DISK_COST>{disk_cost}</DISK_COST>
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<SSH_PUBLIC_KEY>{ssh}</SSH_PUBLIC_KEY>
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</TEMPLATE>
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"""
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template_id = oca.VmTemplate.allocate(
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self.oneadmin_client,
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template_string_formatter.format(
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name=name,
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vcpu=cores,
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cpu=0.1 * cores,
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size=1024 * disk_size,
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memory=1024 * memory,
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# * 10 because we set cpu to *0.1
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cpu_cost=10 * core_price,
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memory_cost=memory_price,
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disk_cost=disk_size_price,
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ssh=ssh
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)
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)
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return template_id
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def delete_template(self, template_id):
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self.oneadmin_client.call(oca.VmTemplate.METHODS[
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'delete'], template_id, False)
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def change_user_password(self, new_password):
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self.oneadmin_client.call(
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oca.User.METHODS['passwd'],
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self.opennebula_user.id,
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new_password
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)
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def add_public_key(self, user, public_key='', merge=False):
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"""
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Args:
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user (CustomUser): Dynamicweb user
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public_key (string): Public key to add to the user
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merge (bool): Optional if True the new public key replaces the old
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Raises:
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KeyExistsError: If replace is False and the user already has a
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public key
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WrongNameError: If no openebula user with this credentials exists
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ConnectionError: If the connection to the opennebula server can't be
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established
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Returns:
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True if public_key was added
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"""
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# TODO: Check if we can remove this first try because we basically just
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# raise the possible Errors
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try:
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open_user = self._get_user(user)
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try:
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old_key = open_user.template.ssh_public_key
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if not merge:
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raise KeyExistsError()
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public_key += '\n{key}'.format(key=old_key)
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except AttributeError:
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pass
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self.oneadmin_client.call('user.update', open_user.id,
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'<CONTEXT><SSH_PUBLIC_KEY>{key}</SSH_PUBLIC_KEY></CONTEXT>'
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.format(key=public_key))
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return True
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except WrongNameError:
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raise
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except ConnectionError:
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raise
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def remove_public_key(self, user, public_key=''):
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"""
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Args:
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user (CustomUser): Dynamicweb user
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public_key (string): Public key to be removed to the user
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Raises:
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KeyDoesNotExistsError: If replace is False and the user already has a
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public key
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WrongNameError: If no openebula user with this credentials exists
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ConnectionError: If the connection to the opennebula server can't be
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established
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Returns:
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True if public_key was removed
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"""
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try:
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open_user = self._get_user(user)
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try:
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old_key = open_user.template.ssh_public_key
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if public_key not in old_key:
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return False
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# raise KeyDoesNotExistsError()
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if '\n{}'.format(public_key) in old_key:
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public_key = old_key.replace('\n{}'.format(public_key), '')
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else:
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public_key = old_key.replace(public_key, '')
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except AttributeError:
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return False
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# raise KeyDoesNotExistsError()
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self.oneadmin_client.call('user.update', open_user.id,
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'<CONTEXT><SSH_PUBLIC_KEY>{key}</SSH_PUBLIC_KEY></CONTEXT>'
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.format(key=public_key))
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return True
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except WrongNameError:
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raise
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except ConnectionError:
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raise
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