/
discovery.go
189 lines (163 loc) · 5.23 KB
/
discovery.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
// Copyright The OpenTelemetry 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.
package configconverter
import (
"context"
"fmt"
"go.opentelemetry.io/collector/confmap"
"github.com/signalfx/splunk-otel-collector/internal/common/discovery"
)
type Discovery struct{}
// Convert will find `service::<extensions|receivers>/splunk.discovery` entries
// provided by the discovery confmap.Provider and relocate them to
// `service::extensions` and `service::pipelines::metrics::receivers`,
// by appending them to existing sequences, if any.
func (Discovery) Convert(_ context.Context, in *confmap.Conf) error {
if in == nil {
return nil
}
out := in.ToStringMap()
service, serviceExtensions, err := getServiceExtensions(out)
if err != nil {
return err
}
out["service"] = service
discoExtensionsIsSet, discoExtensions, err := getDiscoExtensions(service)
if err != nil {
return err
}
discoReceiversIsSet, discoReceivers, err := getDiscoReceivers(service)
if err != nil {
return err
}
// do nothing if discovery provider didn't modify config
if !discoExtensionsIsSet && !discoReceiversIsSet {
return nil
}
if len(discoExtensions) > 0 {
service["extensions"] = appendUnique(serviceExtensions, discoExtensions)
}
metricsPipeline, metricsReceivers, err := getMetricsPipelineAndReceivers(service)
if err != nil {
return err
}
if len(discoReceivers) > 0 {
metricsPipeline["receivers"] = appendUnique(metricsReceivers, discoReceivers)
}
setAutoDiscoveryResourceAttribute(service)
*in = *confmap.NewFromStringMap(out)
return nil
}
func setAutoDiscoveryResourceAttribute(service map[string]any) {
telemetry := map[string]any{}
if tel, ok := service["telemetry"]; ok {
telemetry = tel.(map[string]any)
}
service["telemetry"] = telemetry
resAttrs := map[string]any{}
if ra, ok := telemetry["resource"]; ok {
resAttrs = ra.(map[string]any)
}
telemetry["resource"] = resAttrs
resAttrs["splunk_autodiscovery"] = "true"
}
func getServiceExtensions(out map[string]any) (map[string]any, []any, error) {
service := map[string]any{}
var serviceExtensions []any
if s, hasService := out["service"]; hasService && s != nil {
var ok bool
if service, ok = s.(map[string]any); !ok {
return nil, nil, fmt.Errorf("service is of unexpected form (%T): %v", s, s)
}
if ses, hasExtensions := service["extensions"]; hasExtensions && ses != nil {
var err error
if serviceExtensions, err = toAnySlice(ses); err != nil {
return nil, nil, fmt.Errorf("cannot determine service extensions: %w", err)
}
}
}
return service, serviceExtensions, nil
}
func getDiscoExtensions(service map[string]any) (bool, []any, error) {
var isSet bool
var extensions []any
if des, hasDiscoExtensions := service[discovery.DiscoExtensionsKey]; hasDiscoExtensions {
isSet = true
delete(service, discovery.DiscoExtensionsKey)
var err error
if extensions, err = toAnySlice(des); err != nil {
return false, nil, fmt.Errorf("cannot determine discovery extensions: %w", err)
}
}
return isSet, extensions, nil
}
func getDiscoReceivers(service map[string]any) (bool, []any, error) {
var isSet bool
var receivers []any
if des, hasDiscoReceivers := service[discovery.DiscoReceiversKey]; hasDiscoReceivers {
isSet = true
delete(service, discovery.DiscoReceiversKey)
var err error
if receivers, err = toAnySlice(des); err != nil {
return false, nil, fmt.Errorf("cannot determine discovery receivers: %w", err)
}
}
return isSet, receivers, nil
}
func getMetricsPipelineAndReceivers(service map[string]any) (map[string]any, []any, error) {
pipelines := map[string]any{}
if pl, ok := service["pipelines"]; ok && pl != nil {
pipelines = pl.(map[string]any)
}
service["pipelines"] = pipelines
metricsPipeline := map[string]any{}
if mp, ok := pipelines["metrics"]; ok && mp != nil {
metricsPipeline = mp.(map[string]any)
}
pipelines["metrics"] = metricsPipeline
var metricsReceivers []any
if mr, ok := metricsPipeline["receivers"]; ok && mr != nil {
var err error
if metricsReceivers, err = toAnySlice(mr); err != nil {
return nil, nil, fmt.Errorf("cannot determine metrics pipeline receivers: %w", err)
}
}
return metricsPipeline, metricsReceivers, nil
}
func appendUnique(serviceComponents []any, discoComponents []any) []any {
existing := map[any]struct{}{}
for _, e := range serviceComponents {
existing[e] = struct{}{}
}
for _, e := range discoComponents {
if _, exists := existing[e]; !exists {
serviceComponents = append(serviceComponents, e)
}
}
return serviceComponents
}
func toAnySlice(s any) ([]any, error) {
var out []any
switch v := s.(type) {
case []any:
out = v
case []string:
for _, i := range v {
out = append(out, i)
}
default:
return nil, fmt.Errorf("unexpected form %T", s)
}
return out, nil
}