/
writer_cw.go
230 lines (183 loc) · 5.29 KB
/
writer_cw.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
package metric
import (
"context"
"fmt"
"sort"
"strings"
"time"
"github.com/aws/aws-sdk-go-v2/aws"
"github.com/aws/aws-sdk-go-v2/service/cloudwatch"
"github.com/aws/aws-sdk-go-v2/service/cloudwatch/types"
"github.com/hashicorp/go-multierror"
"github.com/justtrackio/gosoline/pkg/cfg"
"github.com/justtrackio/gosoline/pkg/clock"
gosoCloudwatch "github.com/justtrackio/gosoline/pkg/cloud/aws/cloudwatch"
"github.com/justtrackio/gosoline/pkg/log"
)
const (
PriorityLow = 1
PriorityHigh = 2
UnitCount = types.StandardUnitCount
UnitSeconds = types.StandardUnitSeconds
UnitMilliseconds = types.StandardUnitMilliseconds
chunkSizeCloudWatch = 20
minusOneWeek = -1 * 7 * 24 * time.Hour
plusOneHour = 1 * time.Hour
)
type (
StandardUnit = types.StandardUnit
Dimensions map[string]string
)
type Datum struct {
Priority int `json:"-"`
Timestamp time.Time `json:"timestamp"`
MetricName string `json:"metricName"`
Dimensions Dimensions `json:"dimensions"`
Value float64 `json:"value"`
Unit StandardUnit `json:"unit"`
}
func (d *Datum) Id() string {
return fmt.Sprintf("%s:%s", d.MetricName, d.DimensionKey())
}
func (d *Datum) DimensionKey() string {
dims := make([]string, 0)
for k, v := range d.Dimensions {
flat := fmt.Sprintf("%s:%s", k, v)
dims = append(dims, flat)
}
sort.Strings(dims)
dimKey := strings.Join(dims, "-")
return dimKey
}
func (d *Datum) IsValid() error {
if d.MetricName == "" {
return fmt.Errorf("missing metric name")
}
if d.Priority == 0 {
return fmt.Errorf("metric %s has no priority", d.MetricName)
}
if d.Unit == "" {
return fmt.Errorf("metric %s has no unit", d.MetricName)
}
return nil
}
type Data []*Datum
//go:generate mockery --name Writer
type Writer interface {
GetPriority() int
Write(batch Data)
WriteOne(data *Datum)
}
type cwWriter struct {
logger log.Logger
clock clock.Clock
client gosoCloudwatch.Client
settings *Settings
}
func NewCwWriter(ctx context.Context, config cfg.Config, logger log.Logger) (*cwWriter, error) {
settings := getMetricSettings(config)
testClock := clock.NewRealClock()
client, err := gosoCloudwatch.ProvideClient(ctx, config, log.NewLogger(), "default", func(cfg *gosoCloudwatch.ClientConfig) {
cfg.Settings.Backoff.MaxAttempts = 0
cfg.Settings.Backoff.MaxElapsedTime = 60 * time.Second
cfg.Settings.HttpClient.Timeout = 10 * time.Second
})
if err != nil {
return nil, fmt.Errorf("can not create cloudwatch client: %w", err)
}
return NewCwWriterWithInterfaces(logger, testClock, client, settings), nil
}
func NewCwWriterWithInterfaces(logger log.Logger, clock clock.Clock, cw gosoCloudwatch.Client, settings *Settings) *cwWriter {
return &cwWriter{
logger: logger.WithChannel("metrics"),
clock: clock,
client: cw,
settings: settings,
}
}
func (w *cwWriter) GetPriority() int {
return PriorityHigh
}
func (w *cwWriter) WriteOne(data *Datum) {
w.Write(Data{data})
}
func (w *cwWriter) Write(batch Data) {
if !w.settings.Enabled || len(batch) == 0 {
return
}
metricData, err := w.buildMetricData(batch)
namespace := w.settings.Cloudwatch.Naming.Pattern
values := map[string]string{
"project": w.settings.Project,
"env": w.settings.Environment,
"family": w.settings.Family,
"group": w.settings.Group,
"app": w.settings.Application,
}
for key, val := range values {
templ := fmt.Sprintf("{%s}", key)
namespace = strings.ReplaceAll(namespace, templ, val)
}
logger := w.logger.WithFields(log.Fields{
"namespace": namespace,
})
if err != nil {
logger.Info("could not build metric data: %w", err)
return
}
for i := 0; i < len(metricData); i += chunkSizeCloudWatch {
end := i + chunkSizeCloudWatch
if end > len(metricData) {
end = len(metricData)
}
input := cloudwatch.PutMetricDataInput{
MetricData: metricData[i:end],
Namespace: aws.String(namespace),
}
if _, err = w.client.PutMetricData(context.Background(), &input); err != nil {
logger.Info("could not write metric data: %s", err)
continue
}
}
logger.Debug("written %d metric data sets to cloudwatch", len(metricData))
}
func (w *cwWriter) buildMetricData(batch Data) ([]types.MetricDatum, error) {
start := w.clock.Now().Add(minusOneWeek)
end := w.clock.Now().Add(plusOneHour)
metricData := make([]types.MetricDatum, 0, len(batch))
for _, data := range batch {
if data.Priority < w.GetPriority() {
continue
}
if data.Timestamp.IsZero() {
data.Timestamp = w.clock.Now()
}
if data.Timestamp.Before(start) || data.Timestamp.After(end) {
continue
}
dimensions := make([]types.Dimension, 0)
var err error
for n, v := range data.Dimensions {
if n == "" || v == "" {
err = multierror.Append(err, fmt.Errorf("invalid dimension '%s' = '%s' for metric %s, this will later be rejected", n, v, data.MetricName))
}
dimensions = append(dimensions, types.Dimension{
Name: aws.String(n),
Value: aws.String(v),
})
}
if err != nil {
w.logger.Error("invalid metric dimension: %w", err)
continue
}
datum := types.MetricDatum{
MetricName: aws.String(data.MetricName),
Dimensions: dimensions,
Timestamp: aws.Time(data.Timestamp),
Value: aws.Float64(data.Value),
Unit: data.Unit,
}
metricData = append(metricData, datum)
}
return metricData, nil
}