tests: use pytest instead of unittest
pytest provides session scoped fixtures, making it much easier to reuse resources across tests.
This commit is contained in:
Lucian Petrut
+242
-278
@@ -1,17 +1,18 @@
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# Copyright 2026 Cloudbase Solutions Srl
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# All Rights Reserved.
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"""Test base classes for openvixdisklib integration tests."""
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"""Lab helpers for openvixdisklib integration tests."""
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from __future__ import annotations
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import ctypes
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import os
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import time
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import unittest
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import uuid
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from dataclasses import dataclass
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from typing import Any, Optional
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import pytest
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import yaml
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from pyVim.connect import Disconnect
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from pyVmomi import vim
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@@ -38,290 +39,49 @@ _TASK_POLL_S = 0.5
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_TASK_TIMEOUT_S = 300
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_LAB_VM_PREFIX = "ovdl-test-"
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VDDK_DIR = _VDDK_DIR
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SECTOR_SIZE = 512
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SECTOR_AT_1GB = (1024 * 1024 * 1024) // SECTOR_SIZE
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class TestBase(unittest.TestCase):
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"""Shared lab vSphere settings for live NFC / VDDK integration tests."""
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HOST: str
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PORT: int
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USERNAME: str
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PASSWORD: str
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ALLOW_UNTRUSTED: bool
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DATACENTER: str
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DATASTORE: str
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THUMBPRINT: str
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VM_MOREF: str
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VMX_SPEC: str
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DISK_PATH: str
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SECTOR_SIZE = 512
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SECTOR_AT_1GB = (1024 * 1024 * 1024) // SECTOR_SIZE
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VDDK_DIR = _VDDK_DIR
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_lab_refcount = 0
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_lab_vm_moref: Optional[str] = None
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_lab_vm_name: Optional[str] = None
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@dataclass
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class LabEnv:
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"""vCenter settings and the temporary VM used by a pytest session."""
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@classmethod
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def setUpClass(cls) -> None:
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"""Prepare process environment and create a temporary lab VM."""
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super().setUpClass()
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os.environ.pop("LD_PRELOAD", None)
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cls._ensure_vddk_library_path()
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TestBase._acquire_lab()
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@classmethod
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def tearDownClass(cls) -> None:
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"""Release the temporary lab VM when the last test class finishes."""
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TestBase._release_lab()
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super().tearDownClass()
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def setUp(self) -> None:
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"""Reset per-test state; subclasses may reuse this."""
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super().setUp()
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@classmethod
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def _ensure_vddk_library_path(cls) -> None:
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current = os.environ.get("LD_LIBRARY_PATH", "")
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parts = [p for p in current.split(":") if p]
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if cls.VDDK_DIR not in parts:
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os.environ["LD_LIBRARY_PATH"] = (
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cls.VDDK_DIR if not current else f"{cls.VDDK_DIR}:{current}")
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@classmethod
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def require_vddk(cls) -> None:
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"""Skip when ``libvixDiskLib`` cannot be loaded from ``.vddk``."""
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cls._ensure_vddk_library_path()
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try:
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ctypes.CDLL(_VDDK_LIB)
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except OSError as exc:
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raise unittest.SkipTest(
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f"VDDK library not available at {_VDDK_LIB}: {exc}") from exc
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@classmethod
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def _load_test_config(cls) -> None:
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"""Load lab settings from the repo-root ``.test_config.yaml``."""
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if not os.path.isfile(_CONFIG_PATH):
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raise unittest.SkipTest(
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"integration tests need .test_config.yaml in the repo "
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"root; see README.md for a sample")
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with open(_CONFIG_PATH, encoding="utf-8") as config_file:
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data = yaml.safe_load(config_file) or {}
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missing = [key for key in _CONFIG_KEYS if key not in data]
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if missing:
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raise RuntimeError(
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f"{_CONFIG_PATH} is missing keys: {', '.join(missing)}")
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TestBase.HOST = str(data["host"])
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TestBase.PORT = int(data["port"])
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TestBase.USERNAME = str(data["username"])
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TestBase.PASSWORD = str(data["password"])
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TestBase.ALLOW_UNTRUSTED = bool(data["allow_untrusted"])
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TestBase.DATACENTER = str(data["datacenter"])
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TestBase.DATASTORE = str(data["datastore"])
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@classmethod
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def _connect_vim(cls) -> vim.ServiceInstance:
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return nfc_auth.connect_vim(
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cls.HOST,
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cls.USERNAME,
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cls.PASSWORD,
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port=cls.PORT,
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thumbprint=cls.THUMBPRINT,
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allow_untrusted=cls.ALLOW_UNTRUSTED)
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@classmethod
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def _wait_for_task(cls, task: vim.Task) -> Any:
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deadline = time.monotonic() + _TASK_TIMEOUT_S
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while task.info.state in (
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vim.TaskInfo.State.running, vim.TaskInfo.State.queued):
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if time.monotonic() > deadline:
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raise TimeoutError(
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f"timed out waiting for vSphere task {task}")
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time.sleep(_TASK_POLL_S)
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if task.info.state != vim.TaskInfo.State.success:
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raise RuntimeError(f"vSphere task failed: {task.info.error}")
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return task.info.result
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@classmethod
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def _find_datacenter(
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cls, content: vim.ServiceInstanceContent) -> vim.Datacenter:
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matches = [
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entity for entity in content.rootFolder.childEntity
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if isinstance(entity, vim.Datacenter)
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and entity.name == cls.DATACENTER]
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if not matches:
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raise RuntimeError(f"datacenter {cls.DATACENTER!r} not found")
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return matches[0]
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@classmethod
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def _find_datastore(cls, datacenter: vim.Datacenter) -> vim.Datastore:
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matches = [
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datastore for datastore in datacenter.datastore
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if datastore.name == cls.DATASTORE]
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if not matches:
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raise RuntimeError(
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f"datastore {cls.DATASTORE!r} not found in "
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f"datacenter {cls.DATACENTER!r}")
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return matches[0]
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@classmethod
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def _bind_lab_fields(cls) -> None:
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"""Copy shared lab VM fields onto the active test class."""
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cls.HOST = TestBase.HOST
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cls.PORT = TestBase.PORT
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cls.USERNAME = TestBase.USERNAME
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cls.PASSWORD = TestBase.PASSWORD
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cls.ALLOW_UNTRUSTED = TestBase.ALLOW_UNTRUSTED
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cls.DATACENTER = TestBase.DATACENTER
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cls.DATASTORE = TestBase.DATASTORE
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cls.THUMBPRINT = TestBase.THUMBPRINT
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cls.VM_MOREF = TestBase.VM_MOREF
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cls.VMX_SPEC = TestBase.VMX_SPEC
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cls.DISK_PATH = TestBase.DISK_PATH
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@classmethod
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def _acquire_lab(cls) -> None:
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if TestBase._lab_refcount == 0:
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TestBase._load_test_config()
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TestBase.THUMBPRINT = nfc_auth.get_ssl_cert_thumbprint(
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TestBase.HOST, TestBase.PORT)
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TestBase._create_lab_vm()
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TestBase._lab_refcount += 1
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cls._bind_lab_fields()
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@classmethod
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def _release_lab(cls) -> None:
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if TestBase._lab_refcount == 0:
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return
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TestBase._lab_refcount -= 1
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if TestBase._lab_refcount == 0:
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cls._destroy_lab_vm()
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@classmethod
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def _create_lab_vm(cls) -> None:
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"""Create an empty VM with a 10 GiB thin disk for I/O tests."""
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si = cls._connect_vim()
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vm = None
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try:
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content = si.RetrieveContent()
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datacenter = cls._find_datacenter(content)
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datastore = cls._find_datastore(datacenter)
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if not datastore.host:
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raise RuntimeError(
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f"datastore {cls.DATASTORE!r} is not mounted on any host")
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host = datastore.host[0].key
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pool = host.parent.resourcePool
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vm_name = _LAB_VM_PREFIX + uuid.uuid4().hex[:12]
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vm = cls._wait_for_task(
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datacenter.vmFolder.CreateVM_Task(
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config=cls._vm_config_spec(vm_name, datastore.name),
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pool=pool,
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host=host))
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TestBase._lab_vm_moref = vm._moId
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TestBase._lab_vm_name = vm_name
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TestBase.VM_MOREF = vm._moId
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TestBase.VMX_SPEC = f"moref={vm._moId}"
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disks = [
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device.backing.fileName
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for device in vm.config.hardware.device
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if isinstance(device, vim.vm.device.VirtualDisk)]
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if not disks:
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raise RuntimeError(
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f"temporary VM {vm_name!r} has no virtual disks")
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TestBase.DISK_PATH = disks[0]
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except Exception:
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if vm is not None:
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try:
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cls._wait_for_task(vm.Destroy_Task())
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except Exception:
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pass
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TestBase._lab_vm_moref = None
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TestBase._lab_vm_name = None
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raise
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finally:
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Disconnect(si)
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@classmethod
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def _vm_config_spec(
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cls, vm_name: str, datastore_name: str) -> vim.vm.ConfigSpec:
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config = vim.vm.ConfigSpec()
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config.name = vm_name
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config.guestId = "otherGuest64"
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config.memoryMB = 128
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config.numCPUs = 1
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config.files = vim.vm.FileInfo(
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vmPathName=f"[{datastore_name}]")
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controller = vim.vm.device.ParaVirtualSCSIController()
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controller.key = 1000
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controller.busNumber = 0
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controller.sharedBus = (
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vim.vm.device.VirtualSCSIController.Sharing.noSharing)
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controller_spec = vim.vm.device.VirtualDeviceSpec()
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controller_spec.operation = (
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vim.vm.device.VirtualDeviceSpec.Operation.add)
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controller_spec.device = controller
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backing = vim.vm.device.VirtualDisk.FlatVer2BackingInfo()
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backing.diskMode = "persistent"
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backing.thinProvisioned = True
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backing.fileName = f"[{datastore_name}]"
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disk = vim.vm.device.VirtualDisk()
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disk.key = 2000
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disk.controllerKey = 1000
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disk.unitNumber = 0
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disk.capacityInKB = _DISK_CAPACITY_KB
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disk.backing = backing
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disk_spec = vim.vm.device.VirtualDeviceSpec()
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disk_spec.operation = vim.vm.device.VirtualDeviceSpec.Operation.add
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disk_spec.fileOperation = (
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vim.vm.device.VirtualDeviceSpec.FileOperation.create)
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disk_spec.device = disk
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config.deviceChange = [controller_spec, disk_spec]
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return config
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@classmethod
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def _destroy_lab_vm(cls) -> None:
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"""Power off and delete the temporary lab VM if it still exists."""
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moref = TestBase._lab_vm_moref
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TestBase._lab_vm_moref = None
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TestBase._lab_vm_name = None
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if not moref:
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return
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si = cls._connect_vim()
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try:
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vm = vim.VirtualMachine(moref, si._stub)
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try:
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vm.Reload()
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except Exception:
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return
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if vm.runtime.powerState == vim.VirtualMachinePowerState.poweredOn:
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cls._wait_for_task(vm.PowerOffVM_Task())
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cls._wait_for_task(vm.Destroy_Task())
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finally:
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Disconnect(si)
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host: str
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port: int
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username: str
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password: str
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allow_untrusted: bool
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datacenter: str
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datastore: str
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thumbprint: str
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vm_moref: str
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vmx_spec: str
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disk_path: str
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def authenticate(self, read_only: bool = True) -> NfcAuthSession:
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"""Login to the lab vCenter and complete NFC authd for the temp VM."""
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return nfc_auth.authenticate(
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host=self.HOST,
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username=self.USERNAME,
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password=self.PASSWORD,
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vm_moref=self.VM_MOREF,
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thumbprint=self.THUMBPRINT,
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allow_untrusted=self.ALLOW_UNTRUSTED,
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disk_path=None if read_only else self.DISK_PATH,
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host=self.host,
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username=self.username,
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password=self.password,
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vm_moref=self.vm_moref,
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thumbprint=self.thumbprint,
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allow_untrusted=self.allow_untrusted,
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disk_path=None if read_only else self.disk_path,
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read_only=read_only)
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def vixdisklib_connect_kwargs(
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self, extra: Optional[dict[str, Any]] = None) -> dict[str, Any]:
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"""Return common ``VixDiskLib_ConnectEx`` arguments for the temp VM."""
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kwargs: dict[str, Any] = {
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"server_name": self.HOST,
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"port": self.PORT,
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"thumbprint": self.THUMBPRINT,
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"username": self.USERNAME,
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"password": self.PASSWORD,
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"vmx_spec": self.VMX_SPEC,
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"server_name": self.host,
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"port": self.port,
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"thumbprint": self.thumbprint,
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"username": self.username,
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"password": self.password,
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"vmx_spec": self.vmx_spec,
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"transport_modes": "nbd",
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"read_only": False,
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}
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@@ -329,8 +89,212 @@ class TestBase(unittest.TestCase):
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kwargs.update(extra)
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return kwargs
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def pattern_bytes(self, length: int, seed: bytes) -> bytes:
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"""Return ``length`` bytes by repeating ``seed``."""
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if not seed:
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raise ValueError("seed must be non-empty")
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return (seed * ((length // len(seed)) + 1))[:length]
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def pattern_bytes(length: int, seed: bytes) -> bytes:
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"""Return ``length`` bytes by repeating ``seed``."""
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if not seed:
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raise ValueError("seed must be non-empty")
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return (seed * ((length // len(seed)) + 1))[:length]
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def ensure_vddk_library_path() -> None:
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"""Prepend ``.vddk`` to ``LD_LIBRARY_PATH`` if it is not already there."""
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current = os.environ.get("LD_LIBRARY_PATH", "")
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parts = [p for p in current.split(":") if p]
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if VDDK_DIR not in parts:
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os.environ["LD_LIBRARY_PATH"] = (
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VDDK_DIR if not current else f"{VDDK_DIR}:{current}")
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def require_vddk() -> None:
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"""Skip when ``libvixDiskLib`` cannot be loaded from ``.vddk``."""
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ensure_vddk_library_path()
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try:
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ctypes.CDLL(_VDDK_LIB)
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except OSError as exc:
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pytest.skip(f"VDDK library not available at {_VDDK_LIB}: {exc}")
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def _load_test_config() -> dict[str, Any]:
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if not os.path.isfile(_CONFIG_PATH):
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pytest.skip(
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"integration tests need .test_config.yaml in the repo "
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"root; see README.md for a sample")
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with open(_CONFIG_PATH, encoding="utf-8") as config_file:
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data = yaml.safe_load(config_file) or {}
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missing = [key for key in _CONFIG_KEYS if key not in data]
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if missing:
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raise RuntimeError(
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f"{_CONFIG_PATH} is missing keys: {', '.join(missing)}")
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return {
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"host": str(data["host"]),
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"port": int(data["port"]),
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"username": str(data["username"]),
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"password": str(data["password"]),
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"allow_untrusted": bool(data["allow_untrusted"]),
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"datacenter": str(data["datacenter"]),
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"datastore": str(data["datastore"]),
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}
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def _connect_vim(
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host: str,
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username: str,
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password: str,
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port: int,
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thumbprint: str,
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allow_untrusted: bool) -> vim.ServiceInstance:
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return nfc_auth.connect_vim(
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host,
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username,
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password,
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port=port,
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thumbprint=thumbprint,
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allow_untrusted=allow_untrusted)
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def _wait_for_task(task: vim.Task) -> Any:
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deadline = time.monotonic() + _TASK_TIMEOUT_S
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while task.info.state in (
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vim.TaskInfo.State.running, vim.TaskInfo.State.queued):
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if time.monotonic() > deadline:
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raise TimeoutError(
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f"timed out waiting for vSphere task {task}")
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time.sleep(_TASK_POLL_S)
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if task.info.state != vim.TaskInfo.State.success:
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raise RuntimeError(f"vSphere task failed: {task.info.error}")
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return task.info.result
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def _find_datacenter(
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content: vim.ServiceInstanceContent,
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datacenter_name: str) -> vim.Datacenter:
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matches = [
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entity for entity in content.rootFolder.childEntity
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if isinstance(entity, vim.Datacenter)
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and entity.name == datacenter_name]
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if not matches:
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raise RuntimeError(f"datacenter {datacenter_name!r} not found")
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return matches[0]
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def _find_datastore(
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datacenter: vim.Datacenter, datastore_name: str) -> vim.Datastore:
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matches = [
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datastore for datastore in datacenter.datastore
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if datastore.name == datastore_name]
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if not matches:
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raise RuntimeError(
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f"datastore {datastore_name!r} not found in "
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||||
f"datacenter {datacenter.name!r}")
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return matches[0]
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def _vm_config_spec(vm_name: str, datastore_name: str) -> vim.vm.ConfigSpec:
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config = vim.vm.ConfigSpec()
|
||||
config.name = vm_name
|
||||
config.guestId = "otherGuest64"
|
||||
config.memoryMB = 128
|
||||
config.numCPUs = 1
|
||||
config.files = vim.vm.FileInfo(
|
||||
vmPathName=f"[{datastore_name}]")
|
||||
|
||||
controller = vim.vm.device.ParaVirtualSCSIController()
|
||||
controller.key = 1000
|
||||
controller.busNumber = 0
|
||||
controller.sharedBus = (
|
||||
vim.vm.device.VirtualSCSIController.Sharing.noSharing)
|
||||
controller_spec = vim.vm.device.VirtualDeviceSpec()
|
||||
controller_spec.operation = (
|
||||
vim.vm.device.VirtualDeviceSpec.Operation.add)
|
||||
controller_spec.device = controller
|
||||
|
||||
backing = vim.vm.device.VirtualDisk.FlatVer2BackingInfo()
|
||||
backing.diskMode = "persistent"
|
||||
backing.thinProvisioned = True
|
||||
backing.fileName = f"[{datastore_name}]"
|
||||
disk = vim.vm.device.VirtualDisk()
|
||||
disk.key = 2000
|
||||
disk.controllerKey = 1000
|
||||
disk.unitNumber = 0
|
||||
disk.capacityInKB = _DISK_CAPACITY_KB
|
||||
disk.backing = backing
|
||||
disk_spec = vim.vm.device.VirtualDeviceSpec()
|
||||
disk_spec.operation = vim.vm.device.VirtualDeviceSpec.Operation.add
|
||||
disk_spec.fileOperation = (
|
||||
vim.vm.device.VirtualDeviceSpec.FileOperation.create)
|
||||
disk_spec.device = disk
|
||||
|
||||
config.deviceChange = [controller_spec, disk_spec]
|
||||
return config
|
||||
|
||||
|
||||
def create_lab_vm() -> LabEnv:
|
||||
"""Create an empty VM with a 10 GiB thin disk for I/O tests."""
|
||||
cfg = _load_test_config()
|
||||
thumbprint = nfc_auth.get_ssl_cert_thumbprint(cfg["host"], cfg["port"])
|
||||
si = _connect_vim(
|
||||
cfg["host"], cfg["username"], cfg["password"], cfg["port"],
|
||||
thumbprint, cfg["allow_untrusted"])
|
||||
vm = None
|
||||
try:
|
||||
content = si.RetrieveContent()
|
||||
datacenter = _find_datacenter(content, cfg["datacenter"])
|
||||
datastore = _find_datastore(datacenter, cfg["datastore"])
|
||||
if not datastore.host:
|
||||
raise RuntimeError(
|
||||
f"datastore {cfg['datastore']!r} is not mounted on any host")
|
||||
host = datastore.host[0].key
|
||||
pool = host.parent.resourcePool
|
||||
vm_name = _LAB_VM_PREFIX + uuid.uuid4().hex[:12]
|
||||
vm = _wait_for_task(
|
||||
datacenter.vmFolder.CreateVM_Task(
|
||||
config=_vm_config_spec(vm_name, datastore.name),
|
||||
pool=pool,
|
||||
host=host))
|
||||
disks = [
|
||||
device.backing.fileName
|
||||
for device in vm.config.hardware.device
|
||||
if isinstance(device, vim.vm.device.VirtualDisk)]
|
||||
if not disks:
|
||||
raise RuntimeError(
|
||||
f"temporary VM {vm_name!r} has no virtual disks")
|
||||
return LabEnv(
|
||||
host=cfg["host"],
|
||||
port=cfg["port"],
|
||||
username=cfg["username"],
|
||||
password=cfg["password"],
|
||||
allow_untrusted=cfg["allow_untrusted"],
|
||||
datacenter=cfg["datacenter"],
|
||||
datastore=cfg["datastore"],
|
||||
thumbprint=thumbprint,
|
||||
vm_moref=vm._moId,
|
||||
vmx_spec=f"moref={vm._moId}",
|
||||
disk_path=disks[0])
|
||||
except Exception:
|
||||
if vm is not None:
|
||||
try:
|
||||
_wait_for_task(vm.Destroy_Task())
|
||||
except Exception:
|
||||
pass
|
||||
raise
|
||||
finally:
|
||||
Disconnect(si)
|
||||
|
||||
|
||||
def destroy_lab_vm(lab: LabEnv) -> None:
|
||||
"""Power off and delete the temporary lab VM if it still exists."""
|
||||
si = _connect_vim(
|
||||
lab.host, lab.username, lab.password, lab.port,
|
||||
lab.thumbprint, lab.allow_untrusted)
|
||||
try:
|
||||
vm = vim.VirtualMachine(lab.vm_moref, si._stub)
|
||||
try:
|
||||
vm.Reload()
|
||||
except Exception:
|
||||
return
|
||||
if vm.runtime.powerState == vim.VirtualMachinePowerState.poweredOn:
|
||||
_wait_for_task(vm.PowerOffVM_Task())
|
||||
_wait_for_task(vm.Destroy_Task())
|
||||
finally:
|
||||
Disconnect(si)
|
||||
|
||||
Reference in New Issue
Block a user