mirror of
https://github.com/prometheus/prometheus.git
synced 2024-12-26 06:04:05 -08:00
ca93fd544b
* vendor: update tsdb Signed-off-by: Ganesh Vernekar <cs15btech11018@iith.ac.in> * /api/v1/labels endpoint Signed-off-by: Ganesh Vernekar <cs15btech11018@iith.ac.in> * regex matchers for API Signed-off-by: Ganesh Vernekar <cs15btech11018@iith.ac.in> * Add docs Signed-off-by: Ganesh Vernekar <cs15btech11018@iith.ac.in> * Matchers behaving as OR Signed-off-by: Ganesh Vernekar <cs15btech11018@iith.ac.in> * Removed the matchers Signed-off-by: Ganesh Vernekar <cs15btech11018@iith.ac.in> * vendor: update tsdb using go mod Signed-off-by: Ganesh Vernekar <cs15btech11018@iith.ac.in> * vendor update: tsdb Signed-off-by: Ganesh Vernekar <cs15btech11018@iith.ac.in> * Added LabelNames() to storage.Querier Signed-off-by: Ganesh Vernekar <cs15btech11018@iith.ac.in> * Test for api.labelNames Signed-off-by: Ganesh Vernekar <cs15btech11018@iith.ac.in> * Nits Signed-off-by: Ganesh Vernekar <cs15btech11018@iith.ac.in>
615 lines
14 KiB
Go
615 lines
14 KiB
Go
// Copyright 2016 The Prometheus Authors
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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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package promql
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import (
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"context"
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"fmt"
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"reflect"
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"testing"
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"time"
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"github.com/go-kit/kit/log"
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"github.com/prometheus/prometheus/pkg/labels"
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"github.com/prometheus/prometheus/storage"
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"github.com/prometheus/prometheus/util/testutil"
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)
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func TestQueryConcurrency(t *testing.T) {
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opts := EngineOpts{
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Logger: nil,
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Reg: nil,
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MaxConcurrent: 10,
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MaxSamples: 10,
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Timeout: 100 * time.Second,
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}
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engine := NewEngine(opts)
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ctx, cancelCtx := context.WithCancel(context.Background())
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defer cancelCtx()
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block := make(chan struct{})
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processing := make(chan struct{})
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f := func(context.Context) error {
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processing <- struct{}{}
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<-block
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return nil
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}
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for i := 0; i < opts.MaxConcurrent; i++ {
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q := engine.newTestQuery(f)
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go q.Exec(ctx)
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select {
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case <-processing:
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// Expected.
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case <-time.After(20 * time.Millisecond):
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t.Fatalf("Query within concurrency threshold not being executed")
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}
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}
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q := engine.newTestQuery(f)
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go q.Exec(ctx)
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select {
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case <-processing:
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t.Fatalf("Query above concurrency threshold being executed")
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case <-time.After(20 * time.Millisecond):
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// Expected.
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}
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// Terminate a running query.
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block <- struct{}{}
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select {
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case <-processing:
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// Expected.
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case <-time.After(20 * time.Millisecond):
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t.Fatalf("Query within concurrency threshold not being executed")
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}
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// Terminate remaining queries.
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for i := 0; i < opts.MaxConcurrent; i++ {
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block <- struct{}{}
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}
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}
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func TestQueryTimeout(t *testing.T) {
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opts := EngineOpts{
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Logger: nil,
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Reg: nil,
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MaxConcurrent: 20,
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MaxSamples: 10,
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Timeout: 5 * time.Millisecond,
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}
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engine := NewEngine(opts)
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ctx, cancelCtx := context.WithCancel(context.Background())
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defer cancelCtx()
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query := engine.newTestQuery(func(ctx context.Context) error {
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time.Sleep(50 * time.Millisecond)
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return contextDone(ctx, "test statement execution")
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})
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res := query.Exec(ctx)
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if res.Err == nil {
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t.Fatalf("expected timeout error but got none")
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}
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if _, ok := res.Err.(ErrQueryTimeout); res.Err != nil && !ok {
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t.Fatalf("expected timeout error but got: %s", res.Err)
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}
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}
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func TestQueryCancel(t *testing.T) {
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opts := EngineOpts{
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Logger: nil,
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Reg: nil,
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MaxConcurrent: 10,
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MaxSamples: 10,
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Timeout: 10 * time.Second,
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}
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engine := NewEngine(opts)
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ctx, cancelCtx := context.WithCancel(context.Background())
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defer cancelCtx()
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// Cancel a running query before it completes.
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block := make(chan struct{})
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processing := make(chan struct{})
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query1 := engine.newTestQuery(func(ctx context.Context) error {
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processing <- struct{}{}
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<-block
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return contextDone(ctx, "test statement execution")
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})
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var res *Result
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go func() {
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res = query1.Exec(ctx)
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processing <- struct{}{}
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}()
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<-processing
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query1.Cancel()
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block <- struct{}{}
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<-processing
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if res.Err == nil {
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t.Fatalf("expected cancellation error for query1 but got none")
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}
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if ee := ErrQueryCanceled("test statement execution"); res.Err != ee {
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t.Fatalf("expected error %q, got %q", ee, res.Err)
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}
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// Canceling a query before starting it must have no effect.
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query2 := engine.newTestQuery(func(ctx context.Context) error {
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return contextDone(ctx, "test statement execution")
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})
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query2.Cancel()
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res = query2.Exec(ctx)
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if res.Err != nil {
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t.Fatalf("unexpected error on executing query2: %s", res.Err)
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}
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}
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// errQuerier implements storage.Querier which always returns error.
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type errQuerier struct {
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err error
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}
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func (q *errQuerier) Select(*storage.SelectParams, ...*labels.Matcher) (storage.SeriesSet, error) {
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return errSeriesSet{err: q.err}, q.err
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}
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func (*errQuerier) LabelValues(name string) ([]string, error) { return nil, nil }
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func (*errQuerier) LabelNames() ([]string, error) { return nil, nil }
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func (*errQuerier) Close() error { return nil }
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// errSeriesSet implements storage.SeriesSet which always returns error.
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type errSeriesSet struct {
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err error
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}
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func (errSeriesSet) Next() bool { return false }
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func (errSeriesSet) At() storage.Series { return nil }
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func (e errSeriesSet) Err() error { return e.err }
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func TestQueryError(t *testing.T) {
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opts := EngineOpts{
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Logger: nil,
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Reg: nil,
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MaxConcurrent: 10,
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MaxSamples: 10,
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Timeout: 10 * time.Second,
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}
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engine := NewEngine(opts)
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errStorage := ErrStorage{fmt.Errorf("storage error")}
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queryable := storage.QueryableFunc(func(ctx context.Context, mint, maxt int64) (storage.Querier, error) {
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return &errQuerier{err: errStorage}, nil
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})
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ctx, cancelCtx := context.WithCancel(context.Background())
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defer cancelCtx()
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vectorQuery, err := engine.NewInstantQuery(queryable, "foo", time.Unix(1, 0))
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if err != nil {
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t.Fatalf("unexpected error creating query: %q", err)
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}
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res := vectorQuery.Exec(ctx)
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if res.Err == nil {
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t.Fatalf("expected error on failed select but got none")
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}
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if res.Err != errStorage {
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t.Fatalf("expected error %q, got %q", errStorage, res.Err)
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}
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matrixQuery, err := engine.NewInstantQuery(queryable, "foo[1m]", time.Unix(1, 0))
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if err != nil {
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t.Fatalf("unexpected error creating query: %q", err)
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}
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res = matrixQuery.Exec(ctx)
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if res.Err == nil {
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t.Fatalf("expected error on failed select but got none")
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}
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if res.Err != errStorage {
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t.Fatalf("expected error %q, got %q", errStorage, res.Err)
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}
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}
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func TestEngineShutdown(t *testing.T) {
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opts := EngineOpts{
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Logger: nil,
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Reg: nil,
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MaxConcurrent: 10,
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MaxSamples: 10,
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Timeout: 10 * time.Second,
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}
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engine := NewEngine(opts)
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ctx, cancelCtx := context.WithCancel(context.Background())
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block := make(chan struct{})
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processing := make(chan struct{})
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// Shutdown engine on first handler execution. Should handler execution ever become
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// concurrent this test has to be adjusted accordingly.
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f := func(ctx context.Context) error {
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processing <- struct{}{}
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<-block
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return contextDone(ctx, "test statement execution")
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}
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query1 := engine.newTestQuery(f)
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// Stopping the engine must cancel the base context. While executing queries is
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// still possible, their context is canceled from the beginning and execution should
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// terminate immediately.
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var res *Result
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go func() {
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res = query1.Exec(ctx)
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processing <- struct{}{}
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}()
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<-processing
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cancelCtx()
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block <- struct{}{}
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<-processing
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if res.Err == nil {
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t.Fatalf("expected error on shutdown during query but got none")
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}
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if ee := ErrQueryCanceled("test statement execution"); res.Err != ee {
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t.Fatalf("expected error %q, got %q", ee, res.Err)
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}
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query2 := engine.newTestQuery(func(context.Context) error {
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t.Fatalf("reached query execution unexpectedly")
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return nil
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})
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// The second query is started after the engine shut down. It must
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// be canceled immediately.
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res2 := query2.Exec(ctx)
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if res2.Err == nil {
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t.Fatalf("expected error on querying with canceled context but got none")
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}
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if _, ok := res2.Err.(ErrQueryCanceled); !ok {
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t.Fatalf("expected cancellation error, got %q", res2.Err)
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}
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}
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func TestEngineEvalStmtTimestamps(t *testing.T) {
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test, err := NewTest(t, `
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load 10s
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metric 1 2
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`)
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if err != nil {
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t.Fatalf("unexpected error creating test: %q", err)
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}
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defer test.Close()
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err = test.Run()
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if err != nil {
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t.Fatalf("unexpected error initializing test: %q", err)
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}
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cases := []struct {
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Query string
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Result Value
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Start time.Time
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End time.Time
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Interval time.Duration
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ShouldError bool
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}{
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// Instant queries.
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{
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Query: "1",
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Result: Scalar{V: 1, T: 1000},
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Start: time.Unix(1, 0),
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},
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{
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Query: "metric",
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Result: Vector{
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Sample{Point: Point{V: 1, T: 1000},
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Metric: labels.FromStrings("__name__", "metric")},
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},
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Start: time.Unix(1, 0),
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},
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{
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Query: "metric[20s]",
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Result: Matrix{Series{
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Points: []Point{{V: 1, T: 0}, {V: 2, T: 10000}},
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Metric: labels.FromStrings("__name__", "metric")},
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},
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Start: time.Unix(10, 0),
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},
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// Range queries.
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{
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Query: "1",
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Result: Matrix{Series{
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Points: []Point{{V: 1, T: 0}, {V: 1, T: 1000}, {V: 1, T: 2000}},
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Metric: labels.FromStrings()},
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},
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Start: time.Unix(0, 0),
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End: time.Unix(2, 0),
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Interval: time.Second,
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},
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{
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Query: "metric",
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Result: Matrix{Series{
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Points: []Point{{V: 1, T: 0}, {V: 1, T: 1000}, {V: 1, T: 2000}},
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Metric: labels.FromStrings("__name__", "metric")},
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},
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Start: time.Unix(0, 0),
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End: time.Unix(2, 0),
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Interval: time.Second,
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},
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{
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Query: "metric",
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Result: Matrix{Series{
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Points: []Point{{V: 1, T: 0}, {V: 1, T: 5000}, {V: 2, T: 10000}},
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Metric: labels.FromStrings("__name__", "metric")},
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},
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Start: time.Unix(0, 0),
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End: time.Unix(10, 0),
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Interval: 5 * time.Second,
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},
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{
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Query: `count_values("wrong label!", metric)`,
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ShouldError: true,
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},
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}
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for _, c := range cases {
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var err error
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var qry Query
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if c.Interval == 0 {
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qry, err = test.QueryEngine().NewInstantQuery(test.Queryable(), c.Query, c.Start)
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} else {
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qry, err = test.QueryEngine().NewRangeQuery(test.Queryable(), c.Query, c.Start, c.End, c.Interval)
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}
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if err != nil {
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t.Fatalf("unexpected error creating query: %q", err)
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}
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res := qry.Exec(test.Context())
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if c.ShouldError {
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testutil.NotOk(t, res.Err, "expected error for the query %q", c.Query)
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continue
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}
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if res.Err != nil {
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t.Fatalf("unexpected error running query: %q", res.Err)
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}
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if !reflect.DeepEqual(res.Value, c.Result) {
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t.Fatalf("unexpected result for query %q: got %q wanted %q", c.Query, res.Value.String(), c.Result.String())
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}
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}
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}
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func TestMaxQuerySamples(t *testing.T) {
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test, err := NewTest(t, `
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load 10s
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metric 1 2
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`)
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if err != nil {
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t.Fatalf("unexpected error creating test: %q", err)
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}
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defer test.Close()
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err = test.Run()
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if err != nil {
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t.Fatalf("unexpected error initializing test: %q", err)
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}
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cases := []struct {
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Query string
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MaxSamples int
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Result Result
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Start time.Time
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End time.Time
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Interval time.Duration
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}{
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// Instant queries.
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{
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Query: "1",
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MaxSamples: 1,
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Result: Result{
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nil,
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Scalar{V: 1, T: 1000}},
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Start: time.Unix(1, 0),
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},
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{
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Query: "1",
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MaxSamples: 0,
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Result: Result{
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ErrTooManySamples(env),
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nil,
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},
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Start: time.Unix(1, 0),
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},
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{
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Query: "metric",
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MaxSamples: 0,
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Result: Result{
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ErrTooManySamples(env),
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nil,
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},
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Start: time.Unix(1, 0),
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},
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{
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Query: "metric",
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MaxSamples: 1,
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Result: Result{
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nil,
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Vector{
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Sample{Point: Point{V: 1, T: 1000},
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Metric: labels.FromStrings("__name__", "metric")},
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},
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},
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Start: time.Unix(1, 0),
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},
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{
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Query: "metric[20s]",
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MaxSamples: 2,
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Result: Result{
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nil,
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Matrix{Series{
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Points: []Point{{V: 1, T: 0}, {V: 2, T: 10000}},
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Metric: labels.FromStrings("__name__", "metric")},
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},
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},
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Start: time.Unix(10, 0),
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},
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{
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Query: "metric[20s]",
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MaxSamples: 0,
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Result: Result{
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ErrTooManySamples(env),
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nil,
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},
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Start: time.Unix(10, 0),
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},
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// Range queries.
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{
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Query: "1",
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MaxSamples: 3,
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Result: Result{
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nil,
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Matrix{Series{
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Points: []Point{{V: 1, T: 0}, {V: 1, T: 1000}, {V: 1, T: 2000}},
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Metric: labels.FromStrings()},
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},
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},
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Start: time.Unix(0, 0),
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End: time.Unix(2, 0),
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Interval: time.Second,
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},
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{
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Query: "1",
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MaxSamples: 0,
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Result: Result{
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ErrTooManySamples(env),
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nil,
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},
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Start: time.Unix(0, 0),
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End: time.Unix(2, 0),
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Interval: time.Second,
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},
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{
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Query: "metric",
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MaxSamples: 3,
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Result: Result{
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nil,
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Matrix{Series{
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Points: []Point{{V: 1, T: 0}, {V: 1, T: 1000}, {V: 1, T: 2000}},
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Metric: labels.FromStrings("__name__", "metric")},
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},
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},
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Start: time.Unix(0, 0),
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End: time.Unix(2, 0),
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Interval: time.Second,
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},
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{
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Query: "metric",
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MaxSamples: 2,
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Result: Result{
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ErrTooManySamples(env),
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nil,
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},
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Start: time.Unix(0, 0),
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End: time.Unix(2, 0),
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Interval: time.Second,
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},
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{
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Query: "metric",
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MaxSamples: 3,
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Result: Result{
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nil,
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Matrix{Series{
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Points: []Point{{V: 1, T: 0}, {V: 1, T: 5000}, {V: 2, T: 10000}},
|
|
Metric: labels.FromStrings("__name__", "metric")},
|
|
},
|
|
},
|
|
Start: time.Unix(0, 0),
|
|
End: time.Unix(10, 0),
|
|
Interval: 5 * time.Second,
|
|
},
|
|
{
|
|
Query: "metric",
|
|
MaxSamples: 2,
|
|
Result: Result{
|
|
ErrTooManySamples(env),
|
|
nil,
|
|
},
|
|
Start: time.Unix(0, 0),
|
|
End: time.Unix(10, 0),
|
|
Interval: 5 * time.Second,
|
|
},
|
|
}
|
|
|
|
engine := test.QueryEngine()
|
|
for _, c := range cases {
|
|
var err error
|
|
var qry Query
|
|
|
|
engine.maxSamplesPerQuery = c.MaxSamples
|
|
|
|
if c.Interval == 0 {
|
|
qry, err = engine.NewInstantQuery(test.Queryable(), c.Query, c.Start)
|
|
} else {
|
|
qry, err = engine.NewRangeQuery(test.Queryable(), c.Query, c.Start, c.End, c.Interval)
|
|
}
|
|
if err != nil {
|
|
t.Fatalf("unexpected error creating query: %q", err)
|
|
}
|
|
res := qry.Exec(test.Context())
|
|
if res.Err != nil && res.Err != c.Result.Err {
|
|
t.Fatalf("unexpected error running query: %q, expected to get result: %q", res.Err, c.Result.Value)
|
|
}
|
|
if !reflect.DeepEqual(res.Value, c.Result.Value) {
|
|
t.Fatalf("unexpected result for query %q: got %q wanted %q", c.Query, res.Value.String(), c.Result.String())
|
|
}
|
|
}
|
|
}
|
|
|
|
func TestRecoverEvaluatorRuntime(t *testing.T) {
|
|
ev := &evaluator{logger: log.NewNopLogger()}
|
|
|
|
var err error
|
|
defer ev.recover(&err)
|
|
|
|
// Cause a runtime panic.
|
|
var a []int
|
|
a[123] = 1
|
|
|
|
if err.Error() != "unexpected error" {
|
|
t.Fatalf("wrong error message: %q, expected %q", err, "unexpected error")
|
|
}
|
|
}
|
|
|
|
func TestRecoverEvaluatorError(t *testing.T) {
|
|
ev := &evaluator{logger: log.NewNopLogger()}
|
|
var err error
|
|
|
|
e := fmt.Errorf("custom error")
|
|
|
|
defer func() {
|
|
if err.Error() != e.Error() {
|
|
t.Fatalf("wrong error message: %q, expected %q", err, e)
|
|
}
|
|
}()
|
|
defer ev.recover(&err)
|
|
|
|
panic(e)
|
|
}
|