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| 1 | +// Unless explicitly stated otherwise all files in this repository are licensed |
| 2 | +// under the Apache License Version 2.0. |
| 3 | +// This product includes software developed at Datadog (https://www.datadoghq.com/). |
| 4 | +// Copyright 2026-Present Datadog, Inc. |
| 5 | + |
| 6 | +package config |
| 7 | + |
| 8 | +import ( |
| 9 | + "context" |
| 10 | + "fmt" |
| 11 | + "log/slog" |
| 12 | + "os" |
| 13 | + "strconv" |
| 14 | + "strings" |
| 15 | +) |
| 16 | + |
| 17 | +var deprecatedEnvironmentVariables = []string{ |
| 18 | + "DD_ADDITIONAL_TARGET_LAMBDAS", |
| 19 | + "DD_ENRICH_CLOUDWATCH_TAGS", |
| 20 | + "DD_ENRICH_S3_TAGS", |
| 21 | + "DD_FETCH_LAMBDA_TAGS", |
| 22 | + "DD_FETCH_LOG_GROUP_TAGS", |
| 23 | + "DD_FETCH_S3_TAGS", |
| 24 | + "DD_FETCH_STEP_FUNCTIONS_TAGS", |
| 25 | + "DD_TAGS_CACHE_TTL_SECONDS", |
| 26 | + "DD_TRACE_INTAKE_URL", |
| 27 | + "DD_USE_VPC", |
| 28 | +} |
| 29 | + |
| 30 | +type Config struct { |
| 31 | + APIKey string |
| 32 | + Site string |
| 33 | + URL string |
| 34 | + Port int |
| 35 | + APIURL string |
| 36 | + ForwardLog bool |
| 37 | + UseCompression bool |
| 38 | + CompressionLevel int |
| 39 | + NoSSL bool |
| 40 | + SkipSSLValidation bool |
| 41 | + Tags string |
| 42 | + Source string |
| 43 | + LogLevel string |
| 44 | + UseFIPS bool |
| 45 | +} |
| 46 | + |
| 47 | +func Load(ctx context.Context) (*Config, error) { |
| 48 | + cfg := &Config{ |
| 49 | + Site: envOrDefault("DD_SITE", "datadoghq.com"), |
| 50 | + Port: envOrDefaultInt("DD_PORT", 443), |
| 51 | + ForwardLog: envOrDefaultBool("DD_FORWARD_LOG", true), |
| 52 | + UseCompression: envOrDefaultBool("DD_USE_COMPRESSION", true), |
| 53 | + CompressionLevel: envOrDefaultInt("DD_COMPRESSION_LEVEL", 6), |
| 54 | + NoSSL: envOrDefaultBool("DD_NO_SSL", false), |
| 55 | + SkipSSLValidation: envOrDefaultBool("DD_SKIP_SSL_VALIDATION", false), |
| 56 | + Tags: envOrDefault("DD_TAGS", ""), |
| 57 | + Source: envOrDefault("DD_SOURCE", ""), |
| 58 | + LogLevel: envOrDefault("DD_LOG_LEVEL", "INFO"), |
| 59 | + } |
| 60 | + |
| 61 | + scheme := "https" |
| 62 | + if cfg.NoSSL { |
| 63 | + scheme = "http" |
| 64 | + } |
| 65 | + cfg.URL = envOrDefault("DD_URL", "http-intake.logs."+cfg.Site) |
| 66 | + cfg.APIURL = envOrDefault("DD_API_URL", fmt.Sprintf("%s://api.%s", scheme, cfg.Site)) |
| 67 | + |
| 68 | + logDroppedEnvVars() |
| 69 | + |
| 70 | + useFIPS := envOrDefaultBool("DD_USE_FIPS", false) |
| 71 | + cfg.UseFIPS = useFIPS |
| 72 | + apiKey, err := resolveAPIKey(ctx, useFIPS) |
| 73 | + if err != nil { |
| 74 | + return nil, fmt.Errorf("resolving API key: %w", err) |
| 75 | + } |
| 76 | + cfg.APIKey = apiKey |
| 77 | + |
| 78 | + if err := validateAPIKey(cfg); err != nil { |
| 79 | + return nil, fmt.Errorf("validating API key: %w", err) |
| 80 | + } |
| 81 | + |
| 82 | + return cfg, nil |
| 83 | +} |
| 84 | + |
| 85 | +func logDroppedEnvVars() { |
| 86 | + for _, name := range deprecatedEnvironmentVariables { |
| 87 | + if _, ok := os.LookupEnv(name); ok { |
| 88 | + slog.Warn("deprecated env var set, will be ignored", "name", name) |
| 89 | + } |
| 90 | + } |
| 91 | +} |
| 92 | + |
| 93 | +func envOrDefault(key, fallback string) string { |
| 94 | + if v, ok := os.LookupEnv(key); ok { |
| 95 | + return v |
| 96 | + } |
| 97 | + return fallback |
| 98 | +} |
| 99 | + |
| 100 | +func envOrDefaultBool(key string, fallback bool) bool { |
| 101 | + v, ok := os.LookupEnv(key) |
| 102 | + if !ok { |
| 103 | + return fallback |
| 104 | + } |
| 105 | + return strings.EqualFold(v, "true") |
| 106 | +} |
| 107 | + |
| 108 | +func envOrDefaultInt(key string, fallback int) int { |
| 109 | + v, ok := os.LookupEnv(key) |
| 110 | + if !ok { |
| 111 | + return fallback |
| 112 | + } |
| 113 | + n, err := strconv.Atoi(v) |
| 114 | + if err != nil { |
| 115 | + slog.Warn("invalid integer for env var, using default", "key", key, "value", v, "default", fallback) |
| 116 | + return fallback |
| 117 | + } |
| 118 | + return n |
| 119 | +} |
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