-
Notifications
You must be signed in to change notification settings - Fork 51
/
range_normalize.go
342 lines (300 loc) · 6.85 KB
/
range_normalize.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
package promapi
import (
"fmt"
"sort"
"strings"
"time"
"github.com/prometheus/common/model"
"github.com/prometheus/prometheus/model/labels"
)
func labelValue(ls labels.Labels, name string) (val string, ok bool) {
ls.Range(func(l labels.Label) {
if l.Name == name {
val = l.Value
ok = true
}
})
return val, ok
}
func labelsBefore(ls, o labels.Labels) bool {
if ls.Len() < o.Len() {
return true
}
if ls.Len() > o.Len() {
return false
}
lns := make([]string, 0, ls.Len()+o.Len())
ls.Range(func(l labels.Label) {
lns = append(lns, l.Name)
})
o.Range(func(l labels.Label) {
lns = append(lns, l.Name)
})
sort.Strings(lns)
for _, ln := range lns {
mlv, ok := labelValue(ls, ln)
if !ok {
return true
}
olv, ok := labelValue(o, ln)
if !ok {
return false
}
if mlv < olv {
return true
}
if mlv > olv {
return false
}
}
return false
}
type TimeRange struct {
Start time.Time
End time.Time
}
type MetricTimeRange struct {
Start time.Time
End time.Time
Labels labels.Labels
Fingerprint uint64
}
func Overlaps(a, b MetricTimeRange, step time.Duration) (c TimeRange, ok bool) {
// 0. Different labels
if a.Fingerprint != b.Fingerprint {
return c, false
}
// 1. Equal (within step)
// [s1 e1]
// [s2 e2]
if a.Start.Sub(b.Start).Abs() <= step && a.End.Sub(b.End).Abs() <= step {
if a.Start.Before(b.Start) {
c.Start = a.Start
} else {
c.Start = b.Start
}
if a.End.After(b.End) {
c.End = a.End
} else {
c.End = b.End
}
return c, true
}
// 2. Overlap e1 and s2
// [s1 e1]
// [s2 es2]
if a.Start.Before(b.Start) && a.End.After(b.Start) && a.End.Before(b.End) {
c.Start = a.Start
c.End = b.End
return c, true
}
// 3. Overlap e2 and s1
// [s1 e2]
// [s2 e2]
if a.Start.After(b.Start) && a.Start.Before(b.End) && a.End.After(b.End) {
c.Start = b.Start
c.End = a.End
return c, true
}
// 4. s2 continues e1
// [s1 e1]
// [s2 e2]
if a.Start.Before(b.Start) && a.End.Before(b.End) && a.End.Sub(b.Start).Abs() <= step {
c.Start = a.Start
c.End = b.End
return c, true
}
// 5. s1 continues e2
// [s1 e1]
// [s2 e2]
if a.Start.After(b.Start) && a.End.After(b.End) && a.Start.Sub(b.End).Abs() <= step {
c.Start = b.Start
c.End = a.End
return c, true
}
// 6. Second range fully included in first range
// [s1 e1]
// [s2 e2]
if a.Start.Before(b.Start) && a.End.After(b.End) {
c.Start = a.Start
c.End = a.End
return c, true
}
// 7. Second range included in first range (start aligned)
// [s1 e1]
// [s2 e2]
if a.Start.Sub(b.Start).Abs() <= step && a.End.After(b.End) {
if a.Start.Before(b.Start) {
c.Start = a.Start
} else {
c.Start = b.Start
}
c.End = a.End
return c, true
}
// 8. Second range included in first range (end aligned)
// [s1 e1]
// [s2 e2]
if a.Start.Before(b.Start) && a.End.Sub(b.End).Abs() <= step {
c.Start = a.Start
if a.End.After(b.End) {
c.End = a.End
} else {
c.End = b.End
}
return c, true
}
// 9. First range fully included in second range
// [s1 e1]
// [s2 e2]
if a.Start.After(b.Start) && a.End.Before(b.End) {
c.Start = b.Start
c.End = b.End
return c, true
}
return c, false
}
type MetricTimeRanges []MetricTimeRange
func (mtr MetricTimeRanges) String() string {
sl := make([]string, 0, len(mtr))
for _, tr := range mtr {
sl = append(sl, fmt.Sprintf("%s %s > %s", tr.Labels, tr.Start.UTC().Format(time.RFC3339), tr.End.UTC().Format(time.RFC3339)))
}
return strings.Join(sl, " ** ")
}
func (mtr MetricTimeRanges) Len() int {
return len(mtr)
}
func (mtr MetricTimeRanges) Swap(i, j int) {
mtr[i], mtr[j] = mtr[j], mtr[i]
}
func (mtr MetricTimeRanges) Less(i, j int) bool {
if mtr[i].Fingerprint != mtr[j].Fingerprint {
return labelsBefore(mtr[i].Labels, mtr[j].Labels)
}
return mtr[i].Start.Before(mtr[j].Start)
}
type SeriesTimeRanges struct {
From time.Time
Until time.Time
Ranges MetricTimeRanges
Gaps []TimeRange
Step time.Duration
}
func (str SeriesTimeRanges) covers(ts time.Time) bool {
for _, r := range str.Ranges {
if !r.Start.After(ts) && !r.End.Before(ts) {
return true
}
}
return false
}
func (str *SeriesTimeRanges) FindGaps(baseline SeriesTimeRanges, from, until time.Time) {
for !from.After(until) {
if str.covers(from) || !baseline.covers(from) {
from = from.Add(str.Step)
continue
}
var found bool
for i := range str.Gaps {
if !from.Before(str.Gaps[i].Start) &&
!from.After(str.Gaps[i].End.Add(str.Step)) {
str.Gaps[i].End = from.Add(str.Step)
found = true
break
}
}
if !found {
str.Gaps = append(str.Gaps, TimeRange{Start: from, End: from.Add(str.Step)})
}
from = from.Add(str.Step)
}
}
// merge [t1:t2] [t2:t3] together.
func MergeRanges(source MetricTimeRanges, step time.Duration) (MetricTimeRanges, bool) {
merged := map[uint64]MetricTimeRanges{}
var ok, found, hadMerged bool
var tr TimeRange
for _, src := range source {
if _, ok = merged[src.Fingerprint]; !ok {
merged[src.Fingerprint] = MetricTimeRanges{}
}
found = false
for i := 0; i < len(merged[src.Fingerprint]); i++ {
if tr, ok = Overlaps(merged[src.Fingerprint][i], src, step); ok {
merged[src.Fingerprint][i].Start = tr.Start
merged[src.Fingerprint][i].End = tr.End
found = true
hadMerged = true
}
}
if !found {
merged[src.Fingerprint] = append(merged[src.Fingerprint], src)
}
}
if !hadMerged {
return source, false
}
for fp := range merged {
ok = true
for ok {
merged[fp], ok = MergeRanges(merged[fp], step)
}
}
var total int
for _, ranges := range merged {
total += len(ranges)
}
all := make(MetricTimeRanges, 0, total)
for _, ranges := range merged {
all = append(all, ranges...)
}
sort.Stable(all)
return all, hadMerged
}
func ExpandRangesEnd(src MetricTimeRanges, step time.Duration) {
for i := range src {
src[i].End = src[i].End.Add(step - time.Second)
}
}
func AppendSampleToRanges(dst MetricTimeRanges, ls labels.Labels, vals []model.SamplePair, step time.Duration) MetricTimeRanges {
fp := ls.Hash()
var ts time.Time
var found bool
for _, v := range vals {
ts = v.Timestamp.Time()
found = false
for i := range dst {
if dst[i].Fingerprint != fp {
continue
}
if !ts.Before(dst[i].Start.Add(step*-1)) && !ts.After(dst[i].Start) {
dst[i].Start = ts
found = true
break
}
if !ts.Before(dst[i].Start) &&
!ts.After(dst[i].End.Add(step)) {
dst[i].End = ts
found = true
break
}
}
if !found {
dst = append(dst, MetricTimeRange{
Fingerprint: fp,
Labels: ls,
Start: ts,
End: ts,
})
}
}
return dst
}
func MetricToLabels(m model.Metric) labels.Labels {
lset := make([]string, 0, len(m)*2)
for k, v := range m {
lset = append(lset, string(k), string(v))
}
return labels.FromStrings(lset...)
}