# -*- coding: utf-8 -*- # # Copyright: (c) 2018, Bojan Vitnik <bvitnik@mainstream.rs> # GNU General Public License v3.0+ (see COPYING or https://www.gnu.org/licenses/gpl-3.0.txt) from __future__ import absolute_import, division, print_function __metaclass__ = type import atexit import time import re import traceback XENAPI_IMP_ERR = None try: import XenAPI HAS_XENAPI = True except ImportError: HAS_XENAPI = False XENAPI_IMP_ERR = traceback.format_exc() from ansible.module_utils.basic import env_fallback, missing_required_lib from ansible.module_utils.common.network import is_mac from ansible.module_utils.ansible_release import __version__ as ANSIBLE_VERSION def xenserver_common_argument_spec(): return dict( hostname=dict(type='str', aliases=['host', 'pool'], required=False, default='localhost', fallback=(env_fallback, ['XENSERVER_HOST']), ), username=dict(type='str', aliases=['user', 'admin'], required=False, default='root', fallback=(env_fallback, ['XENSERVER_USER'])), password=dict(type='str', aliases=['pass', 'pwd'], required=False, no_log=True, fallback=(env_fallback, ['XENSERVER_PASSWORD'])), validate_certs=dict(type='bool', required=False, default=True, fallback=(env_fallback, ['XENSERVER_VALIDATE_CERTS'])), ) def xapi_to_module_vm_power_state(power_state): """Maps XAPI VM power states to module VM power states.""" module_power_state_map = { "running": "poweredon", "halted": "poweredoff", "suspended": "suspended", "paused": "paused" } return module_power_state_map.get(power_state) def module_to_xapi_vm_power_state(power_state): """Maps module VM power states to XAPI VM power states.""" vm_power_state_map = { "poweredon": "running", "poweredoff": "halted", "restarted": "running", "suspended": "suspended", "shutdownguest": "halted", "rebootguest": "running", } return vm_power_state_map.get(power_state) def is_valid_ip_addr(ip_addr): """Validates given string as IPv4 address for given string. Args: ip_addr (str): string to validate as IPv4 address. Returns: bool: True if string is valid IPv4 address, else False. """ ip_addr_split = ip_addr.split('.') if len(ip_addr_split) != 4: return False for ip_addr_octet in ip_addr_split: if not ip_addr_octet.isdigit(): return False ip_addr_octet_int = int(ip_addr_octet) if ip_addr_octet_int < 0 or ip_addr_octet_int > 255: return False return True def is_valid_ip_netmask(ip_netmask): """Validates given string as IPv4 netmask. Args: ip_netmask (str): string to validate as IPv4 netmask. Returns: bool: True if string is valid IPv4 netmask, else False. """ ip_netmask_split = ip_netmask.split('.') if len(ip_netmask_split) != 4: return False valid_octet_values = ['0', '128', '192', '224', '240', '248', '252', '254', '255'] for ip_netmask_octet in ip_netmask_split: if ip_netmask_octet not in valid_octet_values: return False if ip_netmask_split[0] != '255' and (ip_netmask_split[1] != '0' or ip_netmask_split[2] != '0' or ip_netmask_split[3] != '0'): return False elif ip_netmask_split[1] != '255' and (ip_netmask_split[2] != '0' or ip_netmask_split[3] != '0'): return False elif ip_netmask_split[2] != '255' and ip_netmask_split[3] != '0': return False return True def is_valid_ip_prefix(ip_prefix): """Validates given string as IPv4 prefix. Args: ip_prefix (str): string to validate as IPv4 prefix. Returns: bool: True if string is valid IPv4 prefix, else False. """ if not ip_prefix.isdigit(): return False ip_prefix_int = int(ip_prefix) if ip_prefix_int < 0 or ip_prefix_int > 32: return False return True def ip_prefix_to_netmask(ip_prefix, skip_check=False): """Converts IPv4 prefix to netmask. Args: ip_prefix (str): IPv4 prefix to convert. skip_check (bool): Skip validation of IPv4 prefix (default: False). Use if you are sure IPv4 prefix is valid. Returns: str: IPv4 netmask equivalent to given IPv4 prefix if IPv4 prefix is valid, else an empty string. """ if skip_check: ip_prefix_valid = True else: ip_prefix_valid = is_valid_ip_prefix(ip_prefix) if ip_prefix_valid: return '.'.join([str((0xffffffff << (32 - int(ip_prefix)) >> i) & 0xff) for i in [24, 16, 8, 0]]) else: return "" def ip_netmask_to_prefix(ip_netmask, skip_check=False): """Converts IPv4 netmask to prefix. Args: ip_netmask (str): IPv4 netmask to convert. skip_check (bool): Skip validation of IPv4 netmask (default: False). Use if you are sure IPv4 netmask is valid. Returns: str: IPv4 prefix equivalent to given IPv4 netmask if IPv4 netmask is valid, else an empty string. """ if skip_check: ip_netmask_valid = True else: ip_netmask_valid = is_valid_ip_netmask(ip_netmask) if ip_netmask_valid: return str(sum([bin(int(i)).count("1") for i in ip_netmask.split(".")])) else: return "" def is_valid_ip6_addr(ip6_addr): """Validates given string as IPv6 address. Args: ip6_addr (str): string to validate as IPv6 address. Returns: bool: True if string is valid IPv6 address, else False. """ ip6_addr = ip6_addr.lower() ip6_addr_split = ip6_addr.split(':') if ip6_addr_split[0] == "": ip6_addr_split.pop(0) if ip6_addr_split[-1] == "": ip6_addr_split.pop(-1) if len(ip6_addr_split) > 8: return False if ip6_addr_split.count("") > 1: return False elif ip6_addr_split.count("") == 1: ip6_addr_split.remove("") else: if len(ip6_addr_split) != 8: return False ip6_addr_hextet_regex = re.compile('^[0-9a-f]{1,4}$') for ip6_addr_hextet in ip6_addr_split: if not bool(ip6_addr_hextet_regex.match(ip6_addr_hextet)): return False return True def is_valid_ip6_prefix(ip6_prefix): """Validates given string as IPv6 prefix. Args: ip6_prefix (str): string to validate as IPv6 prefix. Returns: bool: True if string is valid IPv6 prefix, else False. """ if not ip6_prefix.isdigit(): return False ip6_prefix_int = int(ip6_prefix) if ip6_prefix_int < 0 or ip6_prefix_int > 128: return False return True def get_object_ref(module, name, uuid=None, obj_type="VM", fail=True, msg_prefix=""): """Finds and returns a reference to arbitrary XAPI object. An object is searched by using either name (name_label) or UUID with UUID taken precedence over name. Args: module: Reference to Ansible module object. name (str): Name (name_label) of an object to search for. uuid (str): UUID of an object to search for. obj_type (str): Any valid XAPI object type. See XAPI docs. fail (bool): Should function fail with error message if object is not found or exit silently (default: True). The function always fails if multiple objects with same name are found. msg_prefix (str): A string error messages should be prefixed with (default: ""). Returns: XAPI reference to found object or None if object is not found and fail=False. """ xapi_session = XAPI.connect(module) if obj_type in ["template", "snapshot"]: real_obj_type = "VM" elif obj_type == "home server": real_obj_type = "host" elif obj_type == "ISO image": real_obj_type = "VDI" else: real_obj_type = obj_type obj_ref = None # UUID has precedence over name. if uuid: try: # Find object by UUID. If no object is found using given UUID, # an exception will be generated. obj_ref = xapi_session.xenapi_request("%s.get_by_uuid" % real_obj_type, (uuid,)) except XenAPI.Failure as f: if fail: module.fail_json(msg="%s%s with UUID '%s' not found!" % (msg_prefix, obj_type, uuid)) elif name: try: # Find object by name (name_label). obj_ref_list = xapi_session.xenapi_request("%s.get_by_name_label" % real_obj_type, (name,)) except XenAPI.Failure as f: module.fail_json(msg="XAPI ERROR: %s" % f.details) # If obj_ref_list is empty. if not obj_ref_list: if fail: module.fail_json(msg="%s%s with name '%s' not found!" % (msg_prefix, obj_type, name)) # If obj_ref_list contains multiple object references. elif len(obj_ref_list) > 1: module.fail_json(msg="%smultiple %ss with name '%s' found! Please use UUID." % (msg_prefix, obj_type, name)) # The obj_ref_list contains only one object reference. else: obj_ref = obj_ref_list[0] else: module.fail_json(msg="%sno valid name or UUID supplied for %s!" % (msg_prefix, obj_type)) return obj_ref def gather_vm_params(module, vm_ref): """Gathers all VM parameters available in XAPI database. Args: module: Reference to Ansible module object. vm_ref (str): XAPI reference to VM. Returns: dict: VM parameters. """ # We silently return empty vm_params if bad vm_ref was supplied. if not vm_ref or vm_ref == "OpaqueRef:NULL": return {} xapi_session = XAPI.connect(module) try: vm_params = xapi_session.xenapi.VM.get_record(vm_ref) # We need some params like affinity, VBDs, VIFs, VDIs etc. dereferenced. # Affinity. if vm_params['affinity'] != "OpaqueRef:NULL": vm_affinity = xapi_session.xenapi.host.get_record(vm_params['affinity']) vm_params['affinity'] = vm_affinity else: vm_params['affinity'] = {} # VBDs. vm_vbd_params_list = [xapi_session.xenapi.VBD.get_record(vm_vbd_ref) for vm_vbd_ref in vm_params['VBDs']] # List of VBDs is usually sorted by userdevice but we sort just # in case. We need this list sorted by userdevice so that we can # make positional pairing with module.params['disks']. vm_vbd_params_list = sorted(vm_vbd_params_list, key=lambda vm_vbd_params: int(vm_vbd_params['userdevice'])) vm_params['VBDs'] = vm_vbd_params_list # VDIs. for vm_vbd_params in vm_params['VBDs']: if vm_vbd_params['VDI'] != "OpaqueRef:NULL": vm_vdi_params = xapi_session.xenapi.VDI.get_record(vm_vbd_params['VDI']) else: vm_vdi_params = {} vm_vbd_params['VDI'] = vm_vdi_params # VIFs. vm_vif_params_list = [xapi_session.xenapi.VIF.get_record(vm_vif_ref) for vm_vif_ref in vm_params['VIFs']] # List of VIFs is usually sorted by device but we sort just # in case. We need this list sorted by device so that we can # make positional pairing with module.params['networks']. vm_vif_params_list = sorted(vm_vif_params_list, key=lambda vm_vif_params: int(vm_vif_params['device'])) vm_params['VIFs'] = vm_vif_params_list # Networks. for vm_vif_params in vm_params['VIFs']: if vm_vif_params['network'] != "OpaqueRef:NULL": vm_network_params = xapi_session.xenapi.network.get_record(vm_vif_params['network']) else: vm_network_params = {} vm_vif_params['network'] = vm_network_params # Guest metrics. if vm_params['guest_metrics'] != "OpaqueRef:NULL": vm_guest_metrics = xapi_session.xenapi.VM_guest_metrics.get_record(vm_params['guest_metrics']) vm_params['guest_metrics'] = vm_guest_metrics else: vm_params['guest_metrics'] = {} # Detect customization agent. xenserver_version = get_xenserver_version(module) if (xenserver_version[0] >= 7 and xenserver_version[1] >= 0 and vm_params.get('guest_metrics') and "feature-static-ip-setting" in vm_params['guest_metrics']['other']): vm_params['customization_agent'] = "native" else: vm_params['customization_agent'] = "custom" except XenAPI.Failure as f: module.fail_json(msg="XAPI ERROR: %s" % f.details) return vm_params def gather_vm_facts(module, vm_params): """Gathers VM facts. Args: module: Reference to Ansible module object. vm_params (dict): A dictionary with VM parameters as returned by gather_vm_params() function. Returns: dict: VM facts. """ # We silently return empty vm_facts if no vm_params are available. if not vm_params: return {} xapi_session = XAPI.connect(module) # Gather facts. vm_facts = { "state": xapi_to_module_vm_power_state(vm_params['power_state'].lower()), "name": vm_params['name_label'], "name_desc": vm_params['name_description'], "uuid": vm_params['uuid'], "is_template": vm_params['is_a_template'], "folder": vm_params['other_config'].get('folder', ''), "hardware": { "num_cpus": int(vm_params['VCPUs_max']), "num_cpu_cores_per_socket": int(vm_params['platform'].get('cores-per-socket', '1')), "memory_mb": int(int(vm_params['memory_dynamic_max']) / 1048576), }, "disks": [], "cdrom": {}, "networks": [], "home_server": vm_params['affinity'].get('name_label', ''), "domid": vm_params['domid'], "platform": vm_params['platform'], "other_config": vm_params['other_config'], "xenstore_data": vm_params['xenstore_data'], "customization_agent": vm_params['customization_agent'], } for vm_vbd_params in vm_params['VBDs']: if vm_vbd_params['type'] == "Disk": vm_disk_sr_params = xapi_session.xenapi.SR.get_record(vm_vbd_params['VDI']['SR']) vm_disk_params = { "size": int(vm_vbd_params['VDI']['virtual_size']), "name": vm_vbd_params['VDI']['name_label'], "name_desc": vm_vbd_params['VDI']['name_description'], "sr": vm_disk_sr_params['name_label'], "sr_uuid": vm_disk_sr_params['uuid'], "os_device": vm_vbd_params['device'], "vbd_userdevice": vm_vbd_params['userdevice'], } vm_facts['disks'].append(vm_disk_params) elif vm_vbd_params['type'] == "CD": if vm_vbd_params['empty']: vm_facts['cdrom'].update(type="none") else: vm_facts['cdrom'].update(type="iso") vm_facts['cdrom'].update(iso_name=vm_vbd_params['VDI']['name_label']) for vm_vif_params in vm_params['VIFs']: vm_guest_metrics_networks = vm_params['guest_metrics'].get('networks', {}) vm_network_params = { "name": vm_vif_params['network']['name_label'], "mac": vm_vif_params['MAC'], "vif_device": vm_vif_params['device'], "mtu": vm_vif_params['MTU'], "ip": vm_guest_metrics_networks.get("%s/ip" % vm_vif_params['device'], ''), "prefix": "", "netmask": "", "gateway": "", "ip6": [vm_guest_metrics_networks[ipv6] for ipv6 in sorted(vm_guest_metrics_networks.keys()) if ipv6.startswith("%s/ipv6/" % vm_vif_params['device'])], "prefix6": "", "gateway6": "", } if vm_params['customization_agent'] == "native": if vm_vif_params['ipv4_addresses'] and vm_vif_params['ipv4_addresses'][0]: vm_network_params['prefix'] = vm_vif_params['ipv4_addresses'][0].split('/')[1] vm_network_params['netmask'] = ip_prefix_to_netmask(vm_network_params['prefix']) vm_network_params['gateway'] = vm_vif_params['ipv4_gateway'] if vm_vif_params['ipv6_addresses'] and vm_vif_params['ipv6_addresses'][0]: vm_network_params['prefix6'] = vm_vif_params['ipv6_addresses'][0].split('/')[1] vm_network_params['gateway6'] = vm_vif_params['ipv6_gateway'] elif vm_params['customization_agent'] == "custom": vm_xenstore_data = vm_params['xenstore_data'] for f in ['prefix', 'netmask', 'gateway', 'prefix6', 'gateway6']: vm_network_params[f] = vm_xenstore_data.get("vm-data/networks/%s/%s" % (vm_vif_params['device'], f), "") vm_facts['networks'].append(vm_network_params) return vm_facts def set_vm_power_state(module, vm_ref, power_state, timeout=300): """Controls VM power state. Args: module: Reference to Ansible module object. vm_ref (str): XAPI reference to VM. power_state (str): Power state to put VM into. Accepted values: - poweredon - poweredoff - restarted - suspended - shutdownguest - rebootguest timeout (int): timeout in seconds (default: 300). Returns: tuple (bool, str): Bool element is True if VM power state has changed by calling this function, else False. Str element carries a value of resulting power state as defined by XAPI - 'running', 'halted' or 'suspended'. """ # Fail if we don't have a valid VM reference. if not vm_ref or vm_ref == "OpaqueRef:NULL": module.fail_json(msg="Cannot set VM power state. Invalid VM reference supplied!") xapi_session = XAPI.connect(module) power_state = power_state.replace('_', '').replace('-', '').lower() vm_power_state_resulting = module_to_xapi_vm_power_state(power_state) state_changed = False try: # Get current state of the VM. vm_power_state_current = xapi_to_module_vm_power_state(xapi_session.xenapi.VM.get_power_state(vm_ref).lower()) if vm_power_state_current != power_state: if power_state == "poweredon": if not module.check_mode: # VM can be in either halted, suspended, paused or running state. # For VM to be in running state, start has to be called on halted, # resume on suspended and unpause on paused VM. if vm_power_state_current == "poweredoff": xapi_session.xenapi.VM.start(vm_ref, False, False) elif vm_power_state_current == "suspended": xapi_session.xenapi.VM.resume(vm_ref, False, False) elif vm_power_state_current == "paused": xapi_session.xenapi.VM.unpause(vm_ref) elif power_state == "poweredoff": if not module.check_mode: # hard_shutdown will halt VM regardless of current state. xapi_session.xenapi.VM.hard_shutdown(vm_ref) elif power_state == "restarted": # hard_reboot will restart VM only if VM is in paused or running state. if vm_power_state_current in ["paused", "poweredon"]: if not module.check_mode: xapi_session.xenapi.VM.hard_reboot(vm_ref) else: module.fail_json(msg="Cannot restart VM in state '%s'!" % vm_power_state_current) elif power_state == "suspended": # running state is required for suspend. if vm_power_state_current == "poweredon": if not module.check_mode: xapi_session.xenapi.VM.suspend(vm_ref) else: module.fail_json(msg="Cannot suspend VM in state '%s'!" % vm_power_state_current) elif power_state == "shutdownguest": # running state is required for guest shutdown. if vm_power_state_current == "poweredon": if not module.check_mode: if timeout == 0: xapi_session.xenapi.VM.clean_shutdown(vm_ref) else: task_ref = xapi_session.xenapi.Async.VM.clean_shutdown(vm_ref) task_result = wait_for_task(module, task_ref, timeout) if task_result: module.fail_json(msg="Guest shutdown task failed: '%s'!" % task_result) else: module.fail_json(msg="Cannot shutdown guest when VM is in state '%s'!" % vm_power_state_current) elif power_state == "rebootguest": # running state is required for guest reboot. if vm_power_state_current == "poweredon": if not module.check_mode: if timeout == 0: xapi_session.xenapi.VM.clean_reboot(vm_ref) else: task_ref = xapi_session.xenapi.Async.VM.clean_reboot(vm_ref) task_result = wait_for_task(module, task_ref, timeout) if task_result: module.fail_json(msg="Guest reboot task failed: '%s'!" % task_result) else: module.fail_json(msg="Cannot reboot guest when VM is in state '%s'!" % vm_power_state_current) else: module.fail_json(msg="Requested VM power state '%s' is unsupported!" % power_state) state_changed = True except XenAPI.Failure as f: module.fail_json(msg="XAPI ERROR: %s" % f.details) return (state_changed, vm_power_state_resulting) def wait_for_task(module, task_ref, timeout=300): """Waits for async XAPI task to finish. Args: module: Reference to Ansible module object. task_ref (str): XAPI reference to task. timeout (int): timeout in seconds (default: 300). Returns: str: failure message on failure, else an empty string. """ # Fail if we don't have a valid task reference. if not task_ref or task_ref == "OpaqueRef:NULL": module.fail_json(msg="Cannot wait for task. Invalid task reference supplied!") xapi_session = XAPI.connect(module) interval = 2 result = "" # If we have to wait indefinitely, make time_left larger than 0 so we can # enter while loop. if timeout == 0: time_left = 1 else: time_left = timeout try: while time_left > 0: task_status = xapi_session.xenapi.task.get_status(task_ref).lower() if task_status == "pending": # Task is still running. time.sleep(interval) # We decrease time_left only if we don't wait indefinitely. if timeout != 0: time_left -= interval continue elif task_status == "success": # Task is done. break else: # Task failed. result = task_status break else: # We timed out. result = "timeout" xapi_session.xenapi.task.destroy(task_ref) except XenAPI.Failure as f: module.fail_json(msg="XAPI ERROR: %s" % f.details) return result def wait_for_vm_ip_address(module, vm_ref, timeout=300): """Waits for VM to acquire an IP address. Args: module: Reference to Ansible module object. vm_ref (str): XAPI reference to VM. timeout (int): timeout in seconds (default: 300). Returns: dict: VM guest metrics as retrieved by VM_guest_metrics.get_record() XAPI method with info on IP address acquired. """ # Fail if we don't have a valid VM reference. if not vm_ref or vm_ref == "OpaqueRef:NULL": module.fail_json(msg="Cannot wait for VM IP address. Invalid VM reference supplied!") xapi_session = XAPI.connect(module) vm_guest_metrics = {} try: # We translate VM power state string so that error message can be # consistent with module VM power states. vm_power_state = xapi_to_module_vm_power_state(xapi_session.xenapi.VM.get_power_state(vm_ref).lower()) if vm_power_state != 'poweredon': module.fail_json(msg="Cannot wait for VM IP address when VM is in state '%s'!" % vm_power_state) interval = 2 # If we have to wait indefinitely, make time_left larger than 0 so we can # enter while loop. if timeout == 0: time_left = 1 else: time_left = timeout while time_left > 0: vm_guest_metrics_ref = xapi_session.xenapi.VM.get_guest_metrics(vm_ref) if vm_guest_metrics_ref != "OpaqueRef:NULL": vm_guest_metrics = xapi_session.xenapi.VM_guest_metrics.get_record(vm_guest_metrics_ref) vm_ips = vm_guest_metrics['networks'] if "0/ip" in vm_ips: break time.sleep(interval) # We decrease time_left only if we don't wait indefinitely. if timeout != 0: time_left -= interval else: # We timed out. module.fail_json(msg="Timed out waiting for VM IP address!") except XenAPI.Failure as f: module.fail_json(msg="XAPI ERROR: %s" % f.details) return vm_guest_metrics def get_xenserver_version(module): """Returns XenServer version. Args: module: Reference to Ansible module object. Returns: list: Element [0] is major version. Element [1] is minor version. Element [2] is update number. """ xapi_session = XAPI.connect(module) host_ref = xapi_session.xenapi.session.get_this_host(xapi_session._session) try: xenserver_version = [int(version_number) for version_number in xapi_session.xenapi.host.get_software_version(host_ref)['product_version'].split('.')] except ValueError: xenserver_version = [0, 0, 0] return xenserver_version class XAPI(object): """Class for XAPI session management.""" _xapi_session = None @classmethod def connect(cls, module, disconnect_atexit=True): """Establishes XAPI connection and returns session reference. If no existing session is available, establishes a new one and returns it, else returns existing one. Args: module: Reference to Ansible module object. disconnect_atexit (bool): Controls if method should register atexit handler to disconnect from XenServer on module exit (default: True). Returns: XAPI session reference. """ if cls._xapi_session is not None: return cls._xapi_session hostname = module.params['hostname'] username = module.params['username'] password = module.params['password'] ignore_ssl = not module.params['validate_certs'] if hostname == 'localhost': cls._xapi_session = XenAPI.xapi_local() username = '' password = '' else: # If scheme is not specified we default to http:// because https:// # is problematic in most setups. if not hostname.startswith("http://") and not hostname.startswith("https://"): hostname = "http://%s" % hostname try: # ignore_ssl is supported in XenAPI library from XenServer 7.2 # SDK onward but there is no way to tell which version we # are using. TypeError will be raised if ignore_ssl is not # supported. Additionally, ignore_ssl requires Python 2.7.9 # or newer. cls._xapi_session = XenAPI.Session(hostname, ignore_ssl=ignore_ssl) except TypeError: # Try without ignore_ssl. cls._xapi_session = XenAPI.Session(hostname) if not password: password = '' try: cls._xapi_session.login_with_password(username, password, ANSIBLE_VERSION, 'Ansible') except XenAPI.Failure as f: module.fail_json(msg="Unable to log on to XenServer at %s as %s: %s" % (hostname, username, f.details)) # Disabling atexit should be used in special cases only. if disconnect_atexit: atexit.register(cls._xapi_session.logout) return cls._xapi_session class XenServerObject(object): """Base class for all XenServer objects. This class contains active XAPI session reference and common attributes with useful info about XenServer host/pool. Attributes: module: Reference to Ansible module object. xapi_session: Reference to XAPI session. pool_ref (str): XAPI reference to a pool currently connected to. default_sr_ref (str): XAPI reference to a pool default Storage Repository. host_ref (str): XAPI rerefence to a host currently connected to. xenserver_version (list of str): Contains XenServer major and minor version. """ def __init__(self, module): """Inits XenServerObject using common module parameters. Args: module: Reference to Ansible module object. """ if not HAS_XENAPI: module.fail_json(changed=False, msg=missing_required_lib("XenAPI"), exception=XENAPI_IMP_ERR) self.module = module self.xapi_session = XAPI.connect(module) try: self.pool_ref = self.xapi_session.xenapi.pool.get_all()[0] self.default_sr_ref = self.xapi_session.xenapi.pool.get_default_SR(self.pool_ref) self.xenserver_version = get_xenserver_version(module) except XenAPI.Failure as f: self.module.fail_json(msg="XAPI ERROR: %s" % f.details)