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30c2596512
Currently, we read from `/proc/diskstats` which is found to be un-reliable in k8s environments. We can read from `sysfs` instead. Also, cache the latest drive io stats to find the diff and update the metrics.
131 lines
3.6 KiB
Go
131 lines
3.6 KiB
Go
//go:build linux && !s390x && !arm && !386
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// +build linux,!s390x,!arm,!386
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// Copyright (c) 2015-2024 MinIO, Inc.
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//
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// This file is part of MinIO Object Storage stack
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Affero General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Affero General Public License for more details.
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//
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// You should have received a copy of the GNU Affero General Public License
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// along with this program. If not, see <http://www.gnu.org/licenses/>.
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package disk
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import (
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"os"
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"reflect"
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"runtime"
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"testing"
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)
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func TestReadDriveStats(t *testing.T) {
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if runtime.GOOS == "windows" {
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t.Skip("skipping this test in windows")
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}
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testCases := []struct {
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stat string
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expectedIOStats IOStats
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expectErr bool
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}{
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{
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stat: "1432553 420084 66247626 2398227 7077314 8720147 157049224 7469810 0 7580552 9869354 46037 0 41695120 1315 0 0",
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expectedIOStats: IOStats{
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ReadIOs: 1432553,
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ReadMerges: 420084,
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ReadSectors: 66247626,
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ReadTicks: 2398227,
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WriteIOs: 7077314,
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WriteMerges: 8720147,
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WriteSectors: 157049224,
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WriteTicks: 7469810,
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CurrentIOs: 0,
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TotalTicks: 7580552,
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ReqTicks: 9869354,
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DiscardIOs: 46037,
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DiscardMerges: 0,
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DiscardSectors: 41695120,
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DiscardTicks: 1315,
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FlushIOs: 0,
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FlushTicks: 0,
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},
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expectErr: false,
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},
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{
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stat: "1432553 420084 66247626 2398227 7077314 8720147 157049224 7469810 0 7580552 9869354 46037 0 41695120 1315",
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expectedIOStats: IOStats{
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ReadIOs: 1432553,
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ReadMerges: 420084,
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ReadSectors: 66247626,
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ReadTicks: 2398227,
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WriteIOs: 7077314,
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WriteMerges: 8720147,
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WriteSectors: 157049224,
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WriteTicks: 7469810,
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CurrentIOs: 0,
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TotalTicks: 7580552,
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ReqTicks: 9869354,
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DiscardIOs: 46037,
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DiscardMerges: 0,
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DiscardSectors: 41695120,
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DiscardTicks: 1315,
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},
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expectErr: false,
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},
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{
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stat: "1432553 420084 66247626 2398227 7077314 8720147 157049224 7469810 0 7580552 9869354",
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expectedIOStats: IOStats{
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ReadIOs: 1432553,
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ReadMerges: 420084,
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ReadSectors: 66247626,
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ReadTicks: 2398227,
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WriteIOs: 7077314,
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WriteMerges: 8720147,
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WriteSectors: 157049224,
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WriteTicks: 7469810,
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CurrentIOs: 0,
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TotalTicks: 7580552,
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ReqTicks: 9869354,
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},
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expectErr: false,
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},
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{
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stat: "1432553 420084 66247626 2398227",
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expectedIOStats: IOStats{},
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expectErr: true,
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},
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}
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for _, testCase := range testCases {
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testCase := testCase
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t.Run("", func(t *testing.T) {
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tmpfile, err := os.CreateTemp("", "testfile")
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if err != nil {
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t.Error(err)
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}
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tmpfile.WriteString(testCase.stat)
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tmpfile.Sync()
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tmpfile.Close()
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iostats, err := readDriveStats(tmpfile.Name())
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if err != nil && !testCase.expectErr {
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t.Fatalf("unexpected err; %v", err)
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}
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if testCase.expectErr && err == nil {
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t.Fatal("expected to fail but err is nil")
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}
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if !reflect.DeepEqual(iostats, testCase.expectedIOStats) {
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t.Fatalf("expected iostats: %v but got %v", testCase.expectedIOStats, iostats)
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}
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})
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}
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}
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