prometheus/storage/local/test_helpers.go

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// Copyright 2014 The Prometheus Authors
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
// NOTE ON FILENAME: Do not rename this file helpers_test.go (which might appear
// an obvious choice). We need NewTestStorage in tests outside of the local
// package, too. On the other hand, moving NewTestStorage in its own package
// would cause circular dependencies in the tests in packages local.
package local
import (
"time"
"github.com/prometheus/common/model"
"github.com/prometheus/prometheus/storage/local/chunk"
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"github.com/prometheus/prometheus/util/testutil"
)
type testStorageCloser struct {
storage Storage
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directory testutil.Closer
}
func (t *testStorageCloser) Close() {
if err := t.storage.Stop(); err != nil {
panic(err)
}
t.directory.Close()
}
// NewTestStorage creates a storage instance backed by files in a temporary
// directory. The returned storage is already in serving state. Upon closing the
// returned test.Closer, the temporary directory is cleaned up.
func NewTestStorage(t testutil.T, encoding chunk.Encoding) (*MemorySeriesStorage, testutil.Closer) {
chunk.DefaultEncoding = encoding
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directory := testutil.NewTemporaryDirectory("test_storage", t)
o := &MemorySeriesStorageOptions{
MemoryChunks: 1000000,
MaxChunksToPersist: 1000000,
PersistenceRetentionPeriod: 24 * time.Hour * 365 * 100, // Enough to never trigger purging.
PersistenceStoragePath: directory.Path(),
HeadChunkTimeout: 5 * time.Minute,
CheckpointInterval: time.Hour,
SyncStrategy: Adaptive,
}
storage := NewMemorySeriesStorage(o)
storage.archiveHighWatermark = model.Latest
if err := storage.Start(); err != nil {
directory.Close()
t.Fatalf("Error creating storage: %s", err)
}
closer := &testStorageCloser{
storage: storage,
directory: directory,
}
return storage, closer
}
func makeFingerprintSeriesPair(s *MemorySeriesStorage, fp model.Fingerprint) fingerprintSeriesPair {
return fingerprintSeriesPair{fp, s.seriesForRange(fp, model.Earliest, model.Latest)}
}