690 lines
24 KiB
Python
690 lines
24 KiB
Python
import logging
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import socket
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import oca
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from django.conf import settings
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from oca.exceptions import OpenNebulaException
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from oca.pool import WrongNameError, WrongIdError
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from hosting.models import HostingOrder
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from utils.models import CustomUser
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from utils.tasks import save_ssh_key, save_ssh_key_error_handler
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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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self.email = email
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self.password = password
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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 self._get_opennebula_client(user.email, user.password)
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def _get_opennebula_client(self, username, password):
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return oca.Client(
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"{0}:{1}".format(username, 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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)
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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.error('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,
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'core')
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logger.debug(
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'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(
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'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(
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oca.User.METHODS['allocate'], email,
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password, 'core')
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logger.debug(
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"User {} does not exist. Created the user. User id = {}".format(
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email,
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opennebula_user
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)
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)
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return opennebula_user
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except ConnectionRefusedError:
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logger.error(
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'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.error(
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'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, infoextended=True):
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"""
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# filter:
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# -4: Resources belonging to the user’s primary group
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# -3: Resources belonging to the user
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# -2: All resources
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# -1: Resources belonging to the user and any of his groups
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# >= 0: UID User’s Resources
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# vm states:
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# *-2 Any state, including DONE
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# *-1 Any state, except DONE (Default)
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# *0 INIT
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# *1 PENDING
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# *2 HOLD
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# *3 ACTIVE
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# *4 STOPPED
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# *5 SUSPENDED
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# *6 DONE
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# *7 FAILED
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# *8 POWEROFF
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# *9 UNDEPLOYED
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:param infoextended: When True calls infoextended api method introduced
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in OpenNebula 5.8 else falls back to info which has limited attributes
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of a VM
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:return: the oca VirtualMachinePool object
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"""
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try:
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vm_pool = oca.VirtualMachinePool(self.client)
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if infoextended:
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vm_pool.infoextended(
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filter=-1, # User's resources and any of his groups
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vm_state=-1 # Look for VMs in any state, except DONE
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)
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else:
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vm_pool.info()
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return vm_pool
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except AttributeError as ae:
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logger.error("AttributeError : %s" % str(ae))
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except ConnectionRefusedError:
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logger.error(
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'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 get_ipv6(self, vm_id):
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"""
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Returns the first IPv6 of the given vm.
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:return: An IPv6 address string, if it exists else returns None
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"""
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ipv6_list = self.get_all_ipv6_addresses(vm_id)
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if len(ipv6_list) > 0:
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return ipv6_list[0]
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else:
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return None
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def get_all_ipv6_addresses(self, vm_id):
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"""
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Returns a list of IPv6 addresses of the given vm
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:param vm_id: The ID of the vm
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:return:
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"""
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ipv6_list = []
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vm = self.get_vm(vm_id)
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for nic in vm.template.nics:
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if hasattr(nic, 'ip6_global'):
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ipv6_list.append(nic.ip6_global)
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return ipv6_list
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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=(512 if specs['memory'] == 0.5 else
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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=(512 if specs['memory'] == 0.5 else
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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(
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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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try:
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vm_id = self.client.call(
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oca.VmTemplate.METHODS['instantiate'], template.id, '', True,
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vm_specs, False
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)
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except OpenNebulaException as err:
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logger.error("OpenNebulaException: {0}".format(err))
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return None
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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-hard'
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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.error("Socket timeout error: {0}".format(socket_err))
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except OpenNebulaException as opennebula_err:
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logger.error(
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"OpenNebulaException error: {0}".format(opennebula_err))
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except OSError as os_err:
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logger.error("OSError : {0}".format(os_err))
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except ValueError as value_err:
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logger.error("ValueError : {0}".format(value_err))
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return vm_terminated
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def power_off_vm(self, vm_id):
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vm = None
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try:
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vm = self.get_vm(vm_id)
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vm.poweroff_hard()
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except socket.timeout as socket_err:
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logger.error("Socket timeout error: {0}".format(socket_err))
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except OpenNebulaException as opennebula_err:
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logger.error(
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"OpenNebulaException error: {0}".format(opennebula_err))
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except OSError as os_err:
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logger.error("OSError : {0}".format(os_err))
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except ValueError as value_err:
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logger.error("ValueError : {0}".format(value_err))
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return vm
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def resume(self, vm_id):
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vm = None
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try:
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vm = self.get_vm(vm_id)
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vm.resume()
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except socket.timeout as socket_err:
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logger.error("Socket timeout error: {0}".format(socket_err))
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except OpenNebulaException as opennebula_err:
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logger.error(
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"OpenNebulaException error: {0}".format(opennebula_err))
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except OSError as os_err:
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logger.error("OSError : {0}".format(os_err))
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except ValueError as value_err:
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logger.error("ValueError : {0}".format(value_err))
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return vm
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def save_key_in_vm_template(self, vm_id, ssh_key):
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"""
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Update the template of a given VM and set the ssh key of the user
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:param vm_id: the identifier of the VM object
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:param ssh_key: a newline(\n) separated ssh key string that needs to be
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set in the VM template
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:return:
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"""
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UPDATE_TYPE = 1
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return_value = self.client.call(
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'vm.updateconf',
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vm_id,
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'<CONTEXT><SSH_PUBLIC_KEY>%s</SSH_PUBLIC_KEY></CONTEXT>' % ssh_key,
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UPDATE_TYPE
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)
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if type(return_value) == int:
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logger.debug(
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"Saved the key in VM Template success : %s" % return_value)
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else:
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logger.error(
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"Could not save the key in VM Template. %s" % return_value)
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return return_value
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def save_key_in_opennebula_user(self, ssh_key, update_type=1):
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"""
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Save the given ssh key in OpenNebula user
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# Update type: 0: Replace the whole template.
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1: Merge new template with the existing one.
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:param ssh_key: The ssh key to be saved
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:param update_type: The update type as explained above
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:return:
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"""
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return_value = self.oneadmin_client.call(
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'user.update',
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self.opennebula_user.id,
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'<CONTEXT><SSH_PUBLIC_KEY>%s</SSH_PUBLIC_KEY></CONTEXT>' % ssh_key,
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update_type
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)
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if type(return_value) == int:
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logger.debug(
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"Saved the key in opennebula successfully : %s" % return_value)
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else:
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logger.error(
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"Could not save the key in opennebula. %s" % return_value)
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return
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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.error(
|
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"""Could not connect to host: {host} via protocol
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{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, prefix='public-'):
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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(prefix)
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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,
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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,
|
||
disk_cost=disk_size_price,
|
||
ssh=ssh
|
||
)
|
||
)
|
||
|
||
return template_id
|
||
|
||
def delete_template(self, template_id):
|
||
self.oneadmin_client.call(
|
||
oca.VmTemplate.METHODS['delete'], template_id, False
|
||
)
|
||
|
||
def change_user_password(self, passwd_hash):
|
||
self.oneadmin_client.call(
|
||
oca.User.METHODS['passwd'],
|
||
self.opennebula_user.id,
|
||
passwd_hash
|
||
)
|
||
|
||
def add_public_key(self, user, public_key='', merge=False):
|
||
"""
|
||
|
||
Args:
|
||
user (CustomUser): Dynamicweb user
|
||
public_key (string): Public key to add to the user
|
||
merge (bool): Optional if True the new public key replaces the old
|
||
|
||
Raises:
|
||
KeyExistsError: If replace is False and the user already has a
|
||
public key
|
||
WrongNameError: If no openebula user with this credentials exists
|
||
ConnectionError: If the connection to the opennebula server can't be
|
||
established
|
||
|
||
Returns:
|
||
True if public_key was added
|
||
|
||
"""
|
||
# TODO: Check if we can remove this first try because we basically just
|
||
# raise the possible Errors
|
||
try:
|
||
open_user = self._get_user(user)
|
||
try:
|
||
old_key = open_user.template.ssh_public_key
|
||
if not merge:
|
||
raise KeyExistsError()
|
||
public_key += '\n{key}'.format(key=old_key)
|
||
|
||
except AttributeError:
|
||
pass
|
||
self.oneadmin_client.call('user.update', open_user.id,
|
||
'<CONTEXT><SSH_PUBLIC_KEY>{key}</SSH_PUBLIC_KEY></CONTEXT>'
|
||
.format(key=public_key))
|
||
return True
|
||
except WrongNameError:
|
||
raise
|
||
|
||
except ConnectionError:
|
||
raise
|
||
|
||
def remove_public_key(self, user, public_key=''):
|
||
"""
|
||
|
||
Args:
|
||
user (CustomUser): Dynamicweb user
|
||
public_key (string): Public key to be removed to the user
|
||
|
||
Raises:
|
||
KeyDoesNotExistsError: If replace is False and the user already has a
|
||
public key
|
||
WrongNameError: If no openebula user with this credentials exists
|
||
ConnectionError: If the connection to the opennebula server can't be
|
||
established
|
||
|
||
Returns:
|
||
True if public_key was removed
|
||
|
||
"""
|
||
|
||
try:
|
||
open_user = self._get_user(user)
|
||
try:
|
||
old_key = open_user.template.ssh_public_key
|
||
if public_key not in old_key:
|
||
return False
|
||
# raise KeyDoesNotExistsError()
|
||
if '\n{}'.format(public_key) in old_key:
|
||
public_key = old_key.replace('\n{}'.format(public_key), '')
|
||
else:
|
||
public_key = old_key.replace(public_key, '')
|
||
|
||
except AttributeError:
|
||
return False
|
||
# raise KeyDoesNotExistsError()
|
||
|
||
self.oneadmin_client.call('user.update', open_user.id,
|
||
'<CONTEXT><SSH_PUBLIC_KEY>{key}</SSH_PUBLIC_KEY></CONTEXT>'
|
||
.format(key=public_key))
|
||
return True
|
||
except WrongNameError:
|
||
raise
|
||
|
||
except ConnectionError:
|
||
raise
|
||
|
||
def manage_public_key(self, keys, hosts=None, countdown=0):
|
||
"""
|
||
A function that manages the supplied keys in the
|
||
authorized_keys file of the given list of hosts. If hosts
|
||
parameter is not supplied, all hosts of this customer
|
||
will be configured with the supplied keys
|
||
|
||
:param keys: A list of ssh keys that are to be added/removed
|
||
A key should be a dict of the form
|
||
{
|
||
'value': 'sha-.....', # public key as string
|
||
'state': True # whether key is to be added or
|
||
} # removed
|
||
:param hosts: A list of hosts IPv6 addresses
|
||
:param countdown: Parameter to be passed to celery apply_async
|
||
Allows to delay a task by `countdown` number of seconds
|
||
:return:
|
||
"""
|
||
if hosts is None:
|
||
hosts = self.get_all_hosts()
|
||
|
||
if len(hosts) > 0 and len(keys) > 0:
|
||
save_ssh_key.apply_async((hosts, keys), countdown=countdown,
|
||
link_error=save_ssh_key_error_handler.s())
|
||
else:
|
||
logger.debug(
|
||
"Keys and/or hosts are empty, so not managing any keys"
|
||
)
|
||
|
||
def get_all_hosts(self):
|
||
"""
|
||
A utility function to obtain all hosts of this owner
|
||
:return: A list of IPv6 addresses of all the hosts of this customer or
|
||
an empty list if none exist
|
||
"""
|
||
owner = CustomUser.objects.filter(
|
||
email=self.email).first()
|
||
all_orders = HostingOrder.objects.filter(customer__user=owner)
|
||
hosts = []
|
||
if len(all_orders) > 0:
|
||
logger.debug("The user {} has 1 or more VMs. We need to configure "
|
||
"the ssh keys.".format(self.email))
|
||
for order in all_orders:
|
||
try:
|
||
ip = self.get_ipv6(order.vm_id)
|
||
hosts.append(ip)
|
||
except WrongIdError:
|
||
logger.debug(
|
||
"VM with ID {} does not exist".format(order.vm_id))
|
||
else:
|
||
logger.debug("The user {} has no VMs. We don't need to configure "
|
||
"the ssh keys.".format(self.email))
|
||
return hosts
|