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Prometheus: Fix Instant query time calculation (#60815)

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* Use single point in time instead of doing time range calculation

* Comment update
This commit is contained in:
ismail simsek
2022-12-29 16:32:08 +01:00
committed by GitHub
parent ab1777e7a6
commit 15d32546ea
1 changed files with 7 additions and 6 deletions
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13
pkg/tsdb/prometheus/client/client.go
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@ -50,12 +50,13 @@ func (c *Client) QueryRange(ctx context.Context, q *models.Query) (*http.Respons
}
func (c *Client) QueryInstant(ctx context.Context, q *models.Query) (*http.Response, error) {
qv := map[string]string{"query": q.Expr}
tr := q.TimeRange()
if !tr.End.IsZero() {
qv["time"] = formatTime(tr.End)
}
// We do not need a time range here.
// Instant query evaluates at a single point in time.
// Using q.TimeRange is aligning the query range to step.
// Which causes a misleading time point.
// Instead of aligning we use time point directly.
// https://prometheus.io/docs/prometheus/latest/querying/api/#instant-queries
qv := map[string]string{"query": q.Expr, "time": formatTime(q.End)}
req, err := c.createQueryRequest(ctx, "api/v1/query", qv)
if err != nil {
return nil, err