Merge pull request #939 from tgupta3/vcenter-inventory

Add vcenter as inventory source

Author: ddutt

poetry.lock

@@ -54,6 +54,7 @@ jellyfish = "~0.10"
 altair = '>3.2, <5.0'
 pydantic = '< 2.0'
 numpy = '~1.20'
+pyvmomi = "^8.0.2.0.1"
 
 [tool.poetry.dev-dependencies]
 pylint = "*"

pyproject.toml

@@ -112,6 +112,7 @@ markers =
     controller_source_ansible
     controller_source_native
     controller_source_netbox
+    controller_source_vcenter
     controller_unit_tests
 
     # schema

pytest.ini

@@ -0,0 +1,247 @@
+"""Vcenter module
+
+This module contains the methods to connect to a Vcenter server to
+retrieve the list of VMs.
+"""
+# pylint: disable=no-name-in-module
+# pylint: disable=no-self-argument
+
+import asyncio
+import logging
+from typing import Dict, List, Optional, Union
+from urllib.parse import urlparse
+import ssl
+from pyVim.connect import Disconnect, SmartConnect
+from pyVmomi import vim, vmodl
+
+
+from pydantic import BaseModel, validator, Field
+
+from suzieq.poller.controller.inventory_async_plugin import \
+    InventoryAsyncPlugin
+from suzieq.poller.controller.source.base_source import Source, SourceModel
+from suzieq.shared.utils import get_sensitive_data
+from suzieq.shared.exceptions import InventorySourceError, SensitiveLoadError
+
+_DEFAULT_PORTS = {'https': 443}
+
+logger = logging.getLogger(__name__)
+
+
+class VcenterServerModel(BaseModel):
+    """Model containing data to connect with vcenter server."""
+    host: str
+    port: str
+
+    class Config:
+        """pydantic configuration
+        """
+        extra = 'forbid'
+
+
+class VcenterSourceModel(SourceModel):
+    """Vcenter source validation model."""
+    username: str
+    password: str
+    attributes: Optional[List] = Field(default=['suzieq'])
+    period: Optional[int] = Field(default=3600)
+    ssl_verify: Optional[bool] = Field(alias='ssl-verify')
+    server: Union[str, VcenterServerModel] = Field(alias='url')
+    run_once: Optional[bool] = Field(default=False, alias='run_once')
+
+    @validator('server', pre=True)
+    def validate_and_set(cls, url, values):
+        """Validate the field 'url' and set the correct parameters
+        """
+        if isinstance(url, str):
+            url_data = urlparse(url)
+            host = url_data.hostname
+            if not host:
+                raise ValueError(f'Unable to parse hostname {url}')
+            port = url_data.port or _DEFAULT_PORTS.get("https")
+            if not port:
+                raise ValueError(f'Unable to parse port {url}')
+            server = VcenterServerModel(host=host, port=port)
+            ssl_verify = values['ssl_verify']
+            if ssl_verify is None:
+                ssl_verify = True
+            values['ssl_verify'] = ssl_verify
+            return server
+        elif isinstance(url, VcenterServerModel):
+            return url
+        else:
+            raise ValueError('Unknown input type')
+
+    @validator('password')
+    def validate_password(cls, password):
+        """checks if the password can be load as sensible data
+        """
+        try:
+            if password == 'ask':
+                return password
+            return get_sensitive_data(password)
+        except SensitiveLoadError as e:
+            raise ValueError(e)
+
+
+class Vcenter(Source, InventoryAsyncPlugin):
+    """This class is used to dynamically retrieve the inventory
+    from Vcenter
+    """
+    def __init__(self, config_data: dict, validate: bool = True) -> None:
+        self._status = 'init'
+        self._server: VcenterServerModel = None
+        self._session = None
+
+        super().__init__(config_data, validate)
+
+    @classmethod
+    def get_data_model(cls):
+        return VcenterSourceModel
+
+    def _load(self, input_data):
+        # load the server class from the dictionary
+        if not self._validate:
+            input_data['server'] = VcenterServerModel.construct(
+                **input_data.pop('url', {}))
+            input_data['ssl_verify'] = input_data.pop('ssl-verify', False)
+        super()._load(input_data)
+        if self._data.password == 'ask':
+            self._data.password = get_sensitive_data(
+                'ask', f'{self.name} Insert vcenter password: '
+            )
+        self._server = self._data.server
+        if not self._auth:
+            raise InventorySourceError(
+                f"{self.name} Vcenter must have an "
+                "'auth' set in the 'namespaces' section")
+
+    def _init_session(self):
+        """Initialize the session property"""
+        context = ssl.SSLContext(ssl.PROTOCOL_SSLv23)
+        context.verify_mode = ssl.CERT_REQUIRED
+        if not self._data.ssl_verify:
+            context.verify_mode = ssl.CERT_NONE
+
+        try:
+            self._session = SmartConnect(
+                host=self._server.host,
+                port=self._server.port,
+                user=self._data.username,
+                pwd=self._data.password,
+                sslContext=context
+            )
+        except Exception as e:
+            self._session = None
+            raise InventorySourceError(
+                f"Failed to connect to VCenter: {str(e)}")
+
+    def _get_custom_keys(self, content, attribute_names):
+        """Retrieve custom attribute keys based on their names."""
+        all_custom_fields = {field.name: field.key
+                             for field in content.customFieldsManager.field}
+        return [
+            all_custom_fields[name]
+            for name in attribute_names
+            if name in all_custom_fields
+        ]
+
+    def _create_filter_spec(self, view):
+        """Return a FilterSpec based on provided view and attribute keys."""
+        traversal_spec = vmodl.query.PropertyCollector.TraversalSpec(
+            name='traverseEntities', path='view', skip=False,
+            type=vim.view.ContainerView,
+            selectSet=[vmodl.query.PropertyCollector.SelectionSpec(
+                name='traverseEntities')])
+        prop_set = vmodl.query.PropertyCollector.PropertySpec(
+            all=False, type=vim.VirtualMachine)
+        prop_set.pathSet = ['name', 'guest.ipAddress', 'customValue']
+        obj_spec = vmodl.query.PropertyCollector.ObjectSpec(
+            obj=view, selectSet=[traversal_spec])
+        filter_spec = vmodl.query.PropertyCollector.FilterSpec()
+        filter_spec.objectSet = [obj_spec]
+        filter_spec.propSet = [prop_set]
+        return filter_spec
+
+    async def get_inventory_list(self) -> List:
+        """
+        Retrieve VMs that have any specified custom attribute names.
+
+        This method uses vSphere's Property Collector to fetch only
+        properties that are required. This is a lot faster than
+        fetching the entire inventory and filtering on attributes.
+        """
+        if not self._session:
+            self._init_session()
+
+        content = self._session.RetrieveContent()
+        view = content.viewManager.CreateContainerView(
+            content.rootFolder, [vim.VirtualMachine], True)
+        attribute_keys = self._get_custom_keys(content, self._data.attributes)
+
+        filter_spec = self._create_filter_spec(view)
+        retrieve_options = vmodl.query.PropertyCollector.RetrieveOptions()
+        result = content.propertyCollector.RetrievePropertiesEx(
+            [filter_spec], retrieve_options)
+        vms_with_ip = {}
+        while result:
+            for obj in result.objects:
+                vm_name = None
+                vm_ip = None
+                has_custom_attr = False
+                for prop in obj.propSet:
+                    if prop.name == 'name':
+                        vm_name = prop.val
+                    elif prop.name == 'guest.ipAddress' and prop.val:
+                        vm_ip = prop.val
+                    elif prop.name == 'customValue':
+                        has_custom_attr = any(
+                            cv.key in attribute_keys for cv in prop.val)
+                if has_custom_attr and vm_ip:
+                    vms_with_ip[vm_name] = vm_ip
+
+            if hasattr(result, 'token') and result.token:
+                property_collector = content.propertyCollector
+                result = property_collector.ContinueRetrievePropertiesEx(
+                    token=result.token)
+            else:
+                break
+
+        view.Destroy()
+        logger.info(
+            f'Vcenter: Retrieved {len(vms_with_ip)} VMs with IPs')
+        return vms_with_ip
+
+    def parse_inventory(self, inventory_list: dict) -> Dict:
+        """parse the raw inventory collected from the server and generates
+           a new inventory with only the required information.
+
+        Args:
+            raw_inventory: raw inventory received from vcenter.
+
+        Returns: A dict containing the inventory.
+        """
+        inventory = {}
+        for name, ip in inventory_list.items():
+            namespace = self._namespace
+            inventory[f'{namespace}.{ip}'] = {
+                'address': ip,
+                'namespace': namespace,
+                'hostname': name,
+            }
+        logger.info(
+            f'Vcenter: Acting on inventory of {len(inventory)} devices')
+        return inventory
+
+    async def _execute(self):
+        while True:
+            inventory_list = await self.get_inventory_list()
+            tmp_inventory = self.parse_inventory(inventory_list)
+            self.set_inventory(tmp_inventory)
+            if self._run_once:
+                break
+            await asyncio.sleep(self._data.period)
+
+    async def _stop(self):
+        if self._session:
+            Disconnect(self._session)