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add partial support for env var config to otlp/HTTP #1758
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MrAlias
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open-telemetry:main
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paivagustavo:update_exporter_configuration
Apr 1, 2021
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,132 @@ | ||
| // 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 otlphttp | ||
|
|
||
| import ( | ||
| "fmt" | ||
| "net/url" | ||
| "strconv" | ||
| "strings" | ||
| "time" | ||
| ) | ||
|
|
||
| func applyEnvConfigs(cfg *config, getEnv func(string) string) *config { | ||
| opts := getOptionsFromEnv(getEnv) | ||
| for _, opt := range opts { | ||
| opt.Apply(cfg) | ||
| } | ||
| return cfg | ||
| } | ||
|
|
||
| func getOptionsFromEnv(env func(string) string) []Option { | ||
| var opts []Option | ||
|
|
||
| // Endpoint | ||
| if v, ok := getEnv(env, "ENDPOINT"); ok { | ||
| opts = append(opts, WithEndpoint(v)) | ||
| } | ||
| if v, ok := getEnv(env, "TRACES_ENDPOINT"); ok { | ||
| opts = append(opts, WithTracesEndpoint(v)) | ||
| } | ||
| if v, ok := getEnv(env, "METRICS_ENDPOINT"); ok { | ||
| opts = append(opts, WithMetricsEndpoint(v)) | ||
| } | ||
|
|
||
| // Certificate File | ||
| // TODO: add certificate file env config support | ||
|
|
||
| // Headers | ||
| if h, ok := getEnv(env, "HEADERS"); ok { | ||
| opts = append(opts, WithHeaders(stringToHeader(h))) | ||
| } | ||
| if h, ok := getEnv(env, "TRACES_HEADERS"); ok { | ||
| opts = append(opts, WithTracesHeaders(stringToHeader(h))) | ||
| } | ||
| if h, ok := getEnv(env, "METRICS_HEADERS"); ok { | ||
| opts = append(opts, WithMetricsHeaders(stringToHeader(h))) | ||
| } | ||
|
|
||
| // Compression | ||
| if c, ok := getEnv(env, "COMPRESSION"); ok { | ||
| opts = append(opts, WithCompression(stringToCompression(c))) | ||
| } | ||
| if c, ok := getEnv(env, "TRACES_COMPRESSION"); ok { | ||
| opts = append(opts, WithTracesCompression(stringToCompression(c))) | ||
| } | ||
| if c, ok := getEnv(env, "METRICS_COMPRESSION"); ok { | ||
| opts = append(opts, WithMetricsCompression(stringToCompression(c))) | ||
| } | ||
|
|
||
| // Timeout | ||
| if t, ok := getEnv(env, "TIMEOUT"); ok { | ||
| if d, err := strconv.Atoi(t); err == nil { | ||
| opts = append(opts, WithTimeout(time.Duration(d)*time.Millisecond)) | ||
| } | ||
| } | ||
| if t, ok := getEnv(env, "TRACES_TIMEOUT"); ok { | ||
| if d, err := strconv.Atoi(t); err == nil { | ||
| opts = append(opts, WithTracesTimeout(time.Duration(d)*time.Millisecond)) | ||
| } | ||
| } | ||
| if t, ok := getEnv(env, "METRICS_TIMEOUT"); ok { | ||
| if d, err := strconv.Atoi(t); err == nil { | ||
| opts = append(opts, WithMetricsTimeout(time.Duration(d)*time.Millisecond)) | ||
| } | ||
| } | ||
|
|
||
| return opts | ||
| } | ||
|
|
||
| // getEnv gets an OTLP environment variable value of the specified key using the env function. | ||
| // This function already prepends the OTLP prefix to all key lookup. | ||
| func getEnv(env func(string) string, key string) (string, bool) { | ||
| v := strings.TrimSpace(env(fmt.Sprintf("OTEL_EXPORTER_OTLP_%s", key))) | ||
| return v, v != "" | ||
| } | ||
|
|
||
| func stringToCompression(value string) Compression { | ||
| switch value { | ||
| case "gzip": | ||
| return GzipCompression | ||
| } | ||
|
|
||
| return NoCompression | ||
| } | ||
|
|
||
| func stringToHeader(value string) map[string]string { | ||
| headersPairs := strings.Split(value, ",") | ||
| headers := make(map[string]string) | ||
|
|
||
| for _, header := range headersPairs { | ||
| nameValue := strings.SplitN(header, "=", 2) | ||
| if len(nameValue) < 2 { | ||
| continue | ||
| } | ||
| name, err := url.QueryUnescape(nameValue[0]) | ||
| if err != nil { | ||
| continue | ||
| } | ||
| trimmedName := strings.TrimSpace(name) | ||
| value, err := url.QueryUnescape(nameValue[1]) | ||
| if err != nil { | ||
| continue | ||
| } | ||
| trimmedValue := strings.TrimSpace(value) | ||
|
|
||
| headers[trimmedName] = trimmedValue | ||
| } | ||
|
|
||
| return headers | ||
| } | ||
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