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// Copyright 2019 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.
// +build !nobtrfs
package collector
import (
"strings"
"testing"
"github.com/prometheus/procfs/btrfs"
)
var expectedBtrfsMetrics = [][]btrfsMetric{
{
{name: "info", value: 1, extraLabel: []string{"label"}, extraLabelValue: []string{"fixture"}},
{name: "global_rsv_size_bytes", value: 1.6777216e+07},
{name: "device_size_bytes", value: 1.073741824e+10, extraLabel: []string{"device"}, extraLabelValue: []string{"loop25"}},
{name: "device_size_bytes", value: 1.073741824e+10, extraLabel: []string{"device"}, extraLabelValue: []string{"loop26"}},
{name: "reserved_bytes", value: 0, extraLabel: []string{"block_group_type"}, extraLabelValue: []string{"data"}},
{name: "used_bytes", value: 8.08189952e+08, extraLabel: []string{"block_group_type", "mode"}, extraLabelValue: []string{"data", "raid0"}},
{name: "size_bytes", value: 2.147483648e+09, extraLabel: []string{"block_group_type", "mode"}, extraLabelValue: []string{"data", "raid0"}},
{name: "allocation_ratio", value: 1, extraLabel: []string{"block_group_type", "mode"}, extraLabelValue: []string{"data", "raid0"}},
{name: "reserved_bytes", value: 0, extraLabel: []string{"block_group_type"}, extraLabelValue: []string{"metadata"}},
{name: "used_bytes", value: 933888, extraLabel: []string{"block_group_type", "mode"}, extraLabelValue: []string{"metadata", "raid1"}},
{name: "size_bytes", value: 1.073741824e+09, extraLabel: []string{"block_group_type", "mode"}, extraLabelValue: []string{"metadata", "raid1"}},
{name: "allocation_ratio", value: 2, extraLabel: []string{"block_group_type", "mode"}, extraLabelValue: []string{"metadata", "raid1"}},
{name: "reserved_bytes", value: 0, extraLabel: []string{"block_group_type"}, extraLabelValue: []string{"system"}},
{name: "used_bytes", value: 16384, extraLabel: []string{"block_group_type", "mode"}, extraLabelValue: []string{"system", "raid1"}},
{name: "size_bytes", value: 8.388608e+06, extraLabel: []string{"block_group_type", "mode"}, extraLabelValue: []string{"system", "raid1"}},
{name: "allocation_ratio", value: 2, extraLabel: []string{"block_group_type", "mode"}, extraLabelValue: []string{"system", "raid1"}},
},
{
{name: "info", value: 1, extraLabel: []string{"label"}, extraLabelValue: []string{""}},
{name: "global_rsv_size_bytes", value: 1.6777216e+07},
{name: "device_size_bytes", value: 1.073741824e+10, extraLabel: []string{"device"}, extraLabelValue: []string{"loop22"}},
{name: "device_size_bytes", value: 1.073741824e+10, extraLabel: []string{"device"}, extraLabelValue: []string{"loop23"}},
{name: "device_size_bytes", value: 1.073741824e+10, extraLabel: []string{"device"}, extraLabelValue: []string{"loop24"}},
{name: "device_size_bytes", value: 1.073741824e+10, extraLabel: []string{"device"}, extraLabelValue: []string{"loop25"}},
{name: "reserved_bytes", value: 0, extraLabel: []string{"block_group_type"}, extraLabelValue: []string{"data"}},
{name: "used_bytes", value: 0, extraLabel: []string{"block_group_type", "mode"}, extraLabelValue: []string{"data", "raid5"}},
{name: "size_bytes", value: 6.44087808e+08, extraLabel: []string{"block_group_type", "mode"}, extraLabelValue: []string{"data", "raid5"}},
{name: "allocation_ratio", value: 1.3333333333333333, extraLabel: []string{"block_group_type", "mode"}, extraLabelValue: []string{"data", "raid5"}},
{name: "reserved_bytes", value: 0, extraLabel: []string{"block_group_type"}, extraLabelValue: []string{"metadata"}},
{name: "used_bytes", value: 114688, extraLabel: []string{"block_group_type", "mode"}, extraLabelValue: []string{"metadata", "raid6"}},
{name: "size_bytes", value: 4.29391872e+08, extraLabel: []string{"block_group_type", "mode"}, extraLabelValue: []string{"metadata", "raid6"}},
{name: "allocation_ratio", value: 2, extraLabel: []string{"block_group_type", "mode"}, extraLabelValue: []string{"metadata", "raid6"}},
{name: "reserved_bytes", value: 0, extraLabel: []string{"block_group_type"}, extraLabelValue: []string{"system"}},
{name: "used_bytes", value: 16384, extraLabel: []string{"block_group_type", "mode"}, extraLabelValue: []string{"system", "raid6"}},
{name: "size_bytes", value: 1.6777216e+07, extraLabel: []string{"block_group_type", "mode"}, extraLabelValue: []string{"system", "raid6"}},
{name: "allocation_ratio", value: 2, extraLabel: []string{"block_group_type", "mode"}, extraLabelValue: []string{"system", "raid6"}},
},
}
func checkMetric(exp, got *btrfsMetric) bool {
if exp.name != got.name ||
exp.value != got.value ||
len(exp.extraLabel) != len(got.extraLabel) ||
len(exp.extraLabelValue) != len(got.extraLabelValue) {
return false
}
for i := range exp.extraLabel {
if exp.extraLabel[i] != got.extraLabel[i] {
return false
}
// Devices (loopXX) can appear in random order, so just check the first 4 characters.
if strings.HasPrefix(got.extraLabelValue[i], "loop") &&
exp.extraLabelValue[i][:4] == got.extraLabelValue[i][:4] {
continue
}
if exp.extraLabelValue[i] != got.extraLabelValue[i] {
return false
}
}
return true
}
func TestBtrfs(t *testing.T) {
fs, _ := btrfs.NewFS("fixtures/sys")
collector := &btrfsCollector{fs: fs}
stats, err := collector.fs.Stats()
if err != nil {
t.Fatalf("Failed to retrieve Btrfs stats: %v", err)
}
if len(stats) != len(expectedBtrfsMetrics) {
t.Fatalf("Unexpected number of Btrfs stats: expected %v, got %v", len(expectedBtrfsMetrics), len(stats))
}
for i, s := range stats {
metrics := collector.getMetrics(s)
if len(metrics) != len(expectedBtrfsMetrics[i]) {
t.Fatalf("Unexpected number of Btrfs metrics: expected %v, got %v", len(expectedBtrfsMetrics[i]), len(metrics))
}
for j, m := range metrics {
exp := expectedBtrfsMetrics[i][j]
if !checkMetric(&exp, &m) {
t.Errorf("Incorrect btrfs metric: expected %#v, got: %#v", exp, m)
}
}
}
}
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