mirror of
https://github.com/retspen/webvirtcloud
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337063bf7b
#394 read each host's states in one call and every domain's XML once, for the title, memory and vCPUs. A user's list shows only their own VMs, but it read the XML of every VM on those hosts: a user with two VMs on a host of 300 made about 301 libvirt calls a list load, where the old per-VM reads made 6. get_domain_rows takes the UUIDs the list shows and reads only their XML; the states still come in one call. The capacity reads every domain, as before.
106 lines
5 KiB
Python
106 lines
5 KiB
Python
"""A VM that cannot be read shows as unknown in the lists instead of turning
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the whole page into an error page (host down, failed sync, VM gone)."""
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from types import SimpleNamespace
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from unittest.mock import PropertyMock, patch
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from appsettings.models import AppSettings
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from computes.models import Compute
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from django.contrib.auth import get_user_model
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from django.test import TestCase
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from django.urls import reverse
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from instances.models import Instance
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from lxml import html
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from vrtManager.util import OperationError
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ERROR = "Connection Failed: No route to host"
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UP_INFO = [1, 4194304, 2097152, 3, 0]
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class UnreachableListTests(TestCase):
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def setUp(self):
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self.client.force_login(
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get_user_model().objects.create_superuser(username="down-admin", password="pwd", email="down@example.com")
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)
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self.compute = Compute.objects.create(name="down-compute", hostname="192.0.2.1", type=1, login="u", password="p")
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self.vm_a = Instance.objects.create(compute=self.compute, name="vm-a", uuid="11111111-1111-1111-1111-111111111111")
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self.vm_b = Instance.objects.create(compute=self.compute, name="vm-b", uuid="22222222-2222-2222-2222-222222222222")
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def get(self, url, rows=None):
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"""The page with the host down, or up with these VM rows (get_domain_rows),
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or up with the error its listing raises."""
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up = rows is not None
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def domain_rows(uuids=None):
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if isinstance(rows, Exception):
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raise rows
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return rows
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def no_live_host_data(_self):
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raise AssertionError("host data read for a host that is down")
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props = {"status": up, "connection_error": None if up else ERROR}
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patches = [patch.object(Compute, k, new_callable=PropertyMock, return_value=v) for k, v in props.items()]
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for name in ("cpu_count", "ram_size", "ram_usage"):
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if up:
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patches.append(patch.object(Compute, name, new_callable=PropertyMock, return_value=1))
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else:
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patches.append(patch.object(Compute, name, property(no_live_host_data)))
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patches += [
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patch("instances.views.utils.refr"),
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patch("computes.views.utils.refresh_instance_database"),
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patch.object(Compute, "proxy", new_callable=PropertyMock,
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return_value=SimpleNamespace(get_domain_rows=domain_rows)),
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]
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for p in patches:
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p.start()
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try:
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response = self.client.get(url)
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finally:
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for p in reversed(patches):
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p.stop()
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self.assertEqual(response.status_code, 200)
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return response
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def assert_unknown(self, response, instances):
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for vm in instances:
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self.assertContains(response, vm.name)
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self.assertNotContains(response, reverse("instances:poweron", args=[vm.id]))
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self.assertNotContains(response, reverse("instances:poweroff", args=[vm.id]))
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states = html.fromstring(response.content).xpath("//span[@data-state]/@data-state")
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self.assertEqual(states.count("Unknown"), len(instances))
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def test_nongrouped_index_lists_the_vms_of_a_down_host(self):
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AppSettings.objects.filter(key="VIEW_INSTANCES_LIST_STYLE").update(value="nongrouped")
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response = self.get(reverse("instances:index"))
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self.assert_unknown(response, [self.vm_a, self.vm_b])
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self.assertContains(response, ERROR)
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def test_grouped_index_lists_the_vms_of_a_down_host(self):
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AppSettings.objects.filter(key="VIEW_INSTANCES_LIST_STYLE").update(value="grouped")
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response = self.get(reverse("instances:index"))
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self.assert_unknown(response, [self.vm_a, self.vm_b])
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self.assertContains(response, "Not connected")
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def test_one_unreadable_vm_does_not_hide_the_others(self):
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AppSettings.objects.filter(key="VIEW_INSTANCES_LIST_STYLE").update(value="nongrouped")
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# vm-b is gone from its host
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response = self.get(reverse("instances:index"), {self.vm_a.uuid: (UP_INFO, "")})
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self.assert_unknown(response, [self.vm_b])
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self.assertContains(response, reverse("instances:poweroff", args=[self.vm_a.id]))
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def test_a_host_whose_listing_fails_shows_its_vms_unknown(self):
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AppSettings.objects.filter(key="VIEW_INSTANCES_LIST_STYLE").update(value="nongrouped")
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response = self.get(reverse("instances:index"), OperationError(ERROR))
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self.assert_unknown(response, [self.vm_a, self.vm_b])
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def test_compute_instances_page_of_a_down_host(self):
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response = self.get(reverse("instances", args=[self.compute.id]))
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self.assert_unknown(response, [self.vm_a, self.vm_b])
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self.assertContains(response, ERROR)
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def test_compute_instances_page_does_not_claim_a_down_host_is_empty(self):
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Instance.objects.all().delete()
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response = self.get(reverse("instances", args=[self.compute.id]))
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self.assertNotContains(response, "have any Instances")
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self.assertContains(response, ERROR)
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