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Merge pull request #5458 from matrix-org/hawkowl/fix-prometheus

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Fix Prometheus erroring after the extremities monitoring
This commit is contained in:
Erik Johnston 2019-06-14 12:59:02 +01:00 committed by GitHub
commit f03f8b7f4c
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3 changed files with 25 additions and 39 deletions
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1
changelog.d/5458.feature Normal file
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@ -0,0 +1 @@
Statistics on forward extremities per room are now exposed via Prometheus.

2
synapse/metrics/__init__.py
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@ -227,7 +227,7 @@ class BucketCollector(object):
break
for i in self.buckets:
res.append([i, buckets.get(i, 0)])
res.append([str(i), buckets.get(i, 0)])
res.append(["+Inf", sum(data.values())])

61
tests/storage/test_event_metrics.py
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@ -13,6 +13,8 @@
# See the License for the specific language governing permissions and
# limitations under the License.
from prometheus_client.exposition import generate_latest
from synapse.metrics import REGISTRY
from synapse.types import Requester, UserID
@ -52,46 +54,29 @@ class ExtremStatisticsTestCase(HomeserverTestCase):
self.reactor.advance(60 * 60 * 1000)
self.pump(1)
items = list(
items = set(
filter(
lambda x: x.name == "synapse_forward_extremities",
list(REGISTRY.collect()),
lambda x: b"synapse_forward_extremities_" in x,
generate_latest(REGISTRY).split(b"\n"),
)
)
# Check the values are what we want
buckets = {}
_count = 0
_sum = 0
expected = set([
b'synapse_forward_extremities_bucket{le="1.0"} 0.0',
b'synapse_forward_extremities_bucket{le="2.0"} 2.0',
b'synapse_forward_extremities_bucket{le="3.0"} 0.0',
b'synapse_forward_extremities_bucket{le="5.0"} 0.0',
b'synapse_forward_extremities_bucket{le="7.0"} 1.0',
b'synapse_forward_extremities_bucket{le="10.0"} 0.0',
b'synapse_forward_extremities_bucket{le="15.0"} 0.0',
b'synapse_forward_extremities_bucket{le="20.0"} 0.0',
b'synapse_forward_extremities_bucket{le="50.0"} 0.0',
b'synapse_forward_extremities_bucket{le="100.0"} 0.0',
b'synapse_forward_extremities_bucket{le="200.0"} 0.0',
b'synapse_forward_extremities_bucket{le="500.0"} 0.0',
b'synapse_forward_extremities_bucket{le="+Inf"} 3.0',
b'synapse_forward_extremities_count 3.0',
b'synapse_forward_extremities_sum 10.0',
])
for i in items[0].samples:
if i[0].endswith("_bucket"):
buckets[i[1]['le']] = i[2]
elif i[0].endswith("_count"):
_count = i[2]
elif i[0].endswith("_sum"):
_sum = i[2]
# 3 buckets, 2 with 2 extrems, 1 with 6 extrems (bucketed as 7), and
# +Inf which is all
self.assertEqual(
buckets,
{
1.0: 0,
2.0: 2,
3.0: 0,
5.0: 0,
7.0: 1,
10.0: 0,
15.0: 0,
20.0: 0,
50.0: 0,
100.0: 0,
200.0: 0,
500.0: 0,
"+Inf": 3,
},
)
# 3 rooms, with 10 total events
self.assertEqual(_count, 3)
self.assertEqual(_sum, 10)
self.assertEqual(items, expected)