mirror of
https://github.com/prometheus/prometheus.git
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72a9f7fee9
* share tsdb db locker code with agent Closes #9616 Signed-off-by: Robert Fratto <robertfratto@gmail.com> * add flag to disable lockfile for agent Signed-off-by: Robert Fratto <robertfratto@gmail.com> * use agentOnlySetting instead of PreAction Signed-off-by: Robert Fratto <robertfratto@gmail.com> * tsdb: address review feedback 1. Rename Locker to DirLocker 2. Move DirLocker to tsdb/tsdbutil 3. Name metric using fmt.Sprintf 4. Refine error checking in DirLocker test Signed-off-by: Robert Fratto <robertfratto@gmail.com> * tsdb: create test utilities to assert expected DirLocker behavior Signed-off-by: Robert Fratto <robertfratto@gmail.com> * tsdb/tsdbutil: fix lint errors Signed-off-by: Robert Fratto <robertfratto@gmail.com> * tsdb/agent: fix windows test failure Use new DB variable instead of overriding the old one. Signed-off-by: Robert Fratto <robertfratto@gmail.com>
92 lines
2.6 KiB
Go
92 lines
2.6 KiB
Go
// Copyright 2021 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 tsdbutil
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import (
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"fmt"
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"io/ioutil"
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"os"
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"testing"
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"github.com/go-kit/log"
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prom_testutil "github.com/prometheus/client_golang/prometheus/testutil"
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"github.com/stretchr/testify/require"
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"github.com/prometheus/prometheus/util/testutil"
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)
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// TestDirLockerUsage performs a set of tests which guarantee correct usage of
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// DirLocker. open should use data as the storage directory, and createLock
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// to determine if a lock file should be used.
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func TestDirLockerUsage(t *testing.T, open func(t *testing.T, data string, createLock bool) (*DirLocker, testutil.Closer)) {
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t.Helper()
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cases := []struct {
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fileAlreadyExists bool
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lockFileDisabled bool
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expectedValue int
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}{
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{
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fileAlreadyExists: false,
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lockFileDisabled: false,
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expectedValue: lockfileCreatedCleanly,
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},
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{
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fileAlreadyExists: true,
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lockFileDisabled: false,
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expectedValue: lockfileReplaced,
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},
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{
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fileAlreadyExists: true,
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lockFileDisabled: true,
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expectedValue: lockfileDisabled,
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},
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{
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fileAlreadyExists: false,
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lockFileDisabled: true,
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expectedValue: lockfileDisabled,
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},
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}
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for _, c := range cases {
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t.Run(fmt.Sprintf("%+v", c), func(t *testing.T) {
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tmpdir, err := ioutil.TempDir("", "test")
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require.NoError(t, err)
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t.Cleanup(func() {
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require.NoError(t, os.RemoveAll(tmpdir))
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})
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// Test preconditions (file already exists + lockfile option)
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if c.fileAlreadyExists {
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tmpLocker, err := NewDirLocker(tmpdir, "tsdb", log.NewNopLogger(), nil)
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require.NoError(t, err)
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err = ioutil.WriteFile(tmpLocker.path, []byte{}, 0o644)
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require.NoError(t, err)
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}
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locker, closer := open(t, tmpdir, !c.lockFileDisabled)
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require.Equal(t, float64(c.expectedValue), prom_testutil.ToFloat64(locker.createdCleanly))
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// Close the client. This should delete the lockfile.
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closer.Close()
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// Check that the lockfile is always deleted
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if !c.lockFileDisabled {
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_, err = os.Stat(locker.path)
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require.True(t, os.IsNotExist(err), "lockfile was not deleted")
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}
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})
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}
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}
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