mirror of
https://github.com/element-hq/synapse
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165 lines
5.3 KiB
Python
165 lines
5.3 KiB
Python
# -*- coding: utf-8 -*-
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# Copyright 2018 New Vector Ltd
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# Copyright 2019 Matrix.org Foundation C.I.C.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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from synapse.metrics import REGISTRY, InFlightGauge, generate_latest
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from synapse.util.caches.deferred_cache import DeferredCache
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from tests import unittest
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def get_sample_labels_value(sample):
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""" Extract the labels and values of a sample.
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prometheus_client 0.5 changed the sample type to a named tuple with more
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members than the plain tuple had in 0.4 and earlier. This function can
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extract the labels and value from the sample for both sample types.
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Args:
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sample: The sample to get the labels and value from.
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Returns:
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A tuple of (labels, value) from the sample.
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"""
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# If the sample has a labels and value attribute, use those.
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if hasattr(sample, "labels") and hasattr(sample, "value"):
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return sample.labels, sample.value
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# Otherwise fall back to treating it as a plain 3 tuple.
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else:
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_, labels, value = sample
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return labels, value
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class TestMauLimit(unittest.TestCase):
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def test_basic(self):
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gauge = InFlightGauge(
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"test1", "", labels=["test_label"], sub_metrics=["foo", "bar"]
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)
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def handle1(metrics):
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metrics.foo += 2
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metrics.bar = max(metrics.bar, 5)
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def handle2(metrics):
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metrics.foo += 3
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metrics.bar = max(metrics.bar, 7)
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gauge.register(("key1",), handle1)
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self.assert_dict(
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{
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"test1_total": {("key1",): 1},
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"test1_foo": {("key1",): 2},
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"test1_bar": {("key1",): 5},
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},
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self.get_metrics_from_gauge(gauge),
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)
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gauge.unregister(("key1",), handle1)
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self.assert_dict(
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{
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"test1_total": {("key1",): 0},
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"test1_foo": {("key1",): 0},
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"test1_bar": {("key1",): 0},
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},
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self.get_metrics_from_gauge(gauge),
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)
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gauge.register(("key1",), handle1)
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gauge.register(("key2",), handle2)
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self.assert_dict(
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{
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"test1_total": {("key1",): 1, ("key2",): 1},
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"test1_foo": {("key1",): 2, ("key2",): 3},
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"test1_bar": {("key1",): 5, ("key2",): 7},
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},
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self.get_metrics_from_gauge(gauge),
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)
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gauge.unregister(("key2",), handle2)
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gauge.register(("key1",), handle2)
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self.assert_dict(
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{
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"test1_total": {("key1",): 2, ("key2",): 0},
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"test1_foo": {("key1",): 5, ("key2",): 0},
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"test1_bar": {("key1",): 7, ("key2",): 0},
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},
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self.get_metrics_from_gauge(gauge),
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)
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def get_metrics_from_gauge(self, gauge):
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results = {}
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for r in gauge.collect():
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results[r.name] = {
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tuple(labels[x] for x in gauge.labels): value
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for labels, value in map(get_sample_labels_value, r.samples)
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}
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return results
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class BuildInfoTests(unittest.TestCase):
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def test_get_build(self):
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"""
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The synapse_build_info metric reports the OS version, Python version,
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and Synapse version.
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"""
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items = list(
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filter(
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lambda x: b"synapse_build_info{" in x,
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generate_latest(REGISTRY).split(b"\n"),
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)
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)
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self.assertEqual(len(items), 1)
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self.assertTrue(b"osversion=" in items[0])
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self.assertTrue(b"pythonversion=" in items[0])
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self.assertTrue(b"version=" in items[0])
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class CacheMetricsTests(unittest.HomeserverTestCase):
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def test_cache_metric(self):
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"""
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Caches produce metrics reflecting their state when scraped.
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"""
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CACHE_NAME = "cache_metrics_test_fgjkbdfg"
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cache = DeferredCache(CACHE_NAME, max_entries=777)
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items = {
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x.split(b"{")[0].decode("ascii"): x.split(b" ")[1].decode("ascii")
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for x in filter(
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lambda x: b"cache_metrics_test_fgjkbdfg" in x,
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generate_latest(REGISTRY).split(b"\n"),
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)
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}
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self.assertEqual(items["synapse_util_caches_cache_size"], "0.0")
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self.assertEqual(items["synapse_util_caches_cache_max_size"], "777.0")
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cache.prefill("1", "hi")
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items = {
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x.split(b"{")[0].decode("ascii"): x.split(b" ")[1].decode("ascii")
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for x in filter(
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lambda x: b"cache_metrics_test_fgjkbdfg" in x,
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generate_latest(REGISTRY).split(b"\n"),
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)
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}
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self.assertEqual(items["synapse_util_caches_cache_size"], "1.0")
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self.assertEqual(items["synapse_util_caches_cache_max_size"], "777.0")
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