a6d37fa14c
We create a custom histogram metric that logs the userID when the observed value is greater or equal to the last bucket value. This allows us to start tracking the slowest users of a system while at the same time not polluting the Prometheus metrics by storing a userID for every observation. https://mattermost.atlassian.net/browse/MM-61887 ```release-note NONE ```
36 строки
1.1 KiB
Go
36 строки
1.1 KiB
Go
// Copyright (c) 2015-present Mattermost, Inc. All Rights Reserved.
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// See LICENSE.enterprise for license information.
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package metrics
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import (
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"testing"
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"github.com/prometheus/client_golang/prometheus"
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"github.com/stretchr/testify/require"
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"github.com/mattermost/mattermost/server/public/shared/mlog"
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"github.com/mattermost/mattermost/server/v8/channels/api4"
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"github.com/mattermost/mattermost/server/v8/channels/testlib"
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)
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func TestWrappedObserver(t *testing.T) {
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th := api4.Setup(t)
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defer th.TearDown()
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h := NewHistogramVec(prometheus.HistogramOpts{
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Namespace: MetricsNamespace,
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Subsystem: MetricsSubsystemClientsWeb,
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Name: "test",
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Buckets: []float64{0, 5, 10},
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}, []string{"l1"}, th.TestLogger)
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h.With(prometheus.Labels{"l1": "hello"}, th.BasicUser.Id).Observe(6)
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require.NoError(t, th.TestLogger.Flush())
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testlib.AssertNoLog(t, th.LogBuffer, mlog.LvlWarn.Name, "Metric observation exceeded.")
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h.With(prometheus.Labels{"l1": "hello"}, th.BasicUser.Id).Observe(10)
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require.NoError(t, th.TestLogger.Flush())
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testlib.AssertLog(t, th.LogBuffer, mlog.LvlWarn.Name, "Metric observation exceeded.")
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}
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