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Add remoteUser (from http basic auth) and remoteAddr to Thanos slow query logs #6153

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Feb 24, 2023
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Add remoteUser (from http basic auth) and remoteAddr to Thanos slow query logs #6153

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1 change: 1 addition & 0 deletions CHANGELOG.md
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Original file line number Diff line number Diff line change
Expand Up @@ -22,6 +22,7 @@ We use *breaking :warning:* to mark changes that are not backward compatible (re
- [#6104](https://github.com/thanos-io/thanos/pull/6104) Objstore: Support S3 session token.
- [#5548](https://github.com/thanos-io/thanos/pull/5548) Query: Added experimental support for load balancing across multiple Store endpoints.
- [#6148](https://github.com/thanos-io/thanos/pull/6148) Query-frontend: add traceID to slow query detected log line
- [#6153](https://github.com/thanos-io/thanos/pull/6153) Query-frontend: add remote_user (from http basic auth) and remote_addr to slow query detected log line

### Fixed

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7 changes: 7 additions & 0 deletions internal/cortex/frontend/transport/handler.go
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Expand Up @@ -177,11 +177,15 @@ func (f *Handler) reportSlowQuery(r *http.Request, responseHeaders http.Header,
thanosTraceID = traceID
}

remoteUser, _, _ := r.BasicAuth()
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Is this the only way we can get the remote user? Are there maybe some Grafana headers we can use as fallback when basic auth is not used?

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Grafana can be but one client. It's highly possible that users may use custom clients to query some data from Thanos.

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Should we indicate in the changelog that this only works for basic auth?

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Added mention of basic auth


logMessage := append([]interface{}{
"msg", "slow query detected",
"method", r.Method,
"host", r.Host,
"path", r.URL.Path,
"remote_user", remoteUser,
"remote_addr", r.RemoteAddr,
"time_taken", queryResponseTime.String(),
"grafana_dashboard_uid", grafanaDashboardUID,
"grafana_panel_id", grafanaPanelID,
Expand All @@ -200,6 +204,7 @@ func (f *Handler) reportQueryStats(r *http.Request, queryString url.Values, quer
wallTime := stats.LoadWallTime()
numSeries := stats.LoadFetchedSeries()
numBytes := stats.LoadFetchedChunkBytes()
remoteUser, _, _ := r.BasicAuth()

// Track stats.
f.querySeconds.WithLabelValues(userID).Add(wallTime.Seconds())
Expand All @@ -213,6 +218,8 @@ func (f *Handler) reportQueryStats(r *http.Request, queryString url.Values, quer
"component", "query-frontend",
"method", r.Method,
"path", r.URL.Path,
"remote_user", remoteUser,
"remote_addr", r.RemoteAddr,
"response_time", queryResponseTime,
"query_wall_time_seconds", wallTime.Seconds(),
"fetched_series_count", numSeries,
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