Struct AuthConfig 

pub struct AuthConfig {
    pub auth_type: String,
    pub credentials: HashMap<String, SecretString>,
}

Authentication configuration for remote forwarding

Specifies the authentication method and credentials to use when forwarding messages to remote OTLP endpoints.

Supported Authentication Types

• api_key: API key authentication with custom header name

  • Required credentials: key
  • Optional credentials: header_name (default: X-API-Key)

• bearer_token: Bearer token authentication

  • Required credentials: token

• basic: HTTP Basic authentication

  • Required credentials: username, password

Example

use otlp_arrow_library::AuthConfig;
use secrecy::SecretString;
use std::collections::HashMap;

let mut credentials = HashMap::new();
credentials.insert("token".to_string(), SecretString::new("my-bearer-token".to_string()));

let auth = AuthConfig {
    auth_type: "bearer_token".to_string(),
    credentials,
};

Breaking Changes

As of version 0.4.0, credentials values are SecretString instead of String. When creating AuthConfig programmatically, use SecretString::new(). YAML and environment variable loading automatically converts strings to SecretString.

Security Note: Credentials are stored using SecretString to prevent exposure in logs, error messages, or memory dumps. Credentials are zeroed in memory when dropped. Credentials are NOT serialized for security reasons - they must be provided via environment variables or programmatic configuration.

Fields

auth_type: String

Type of authentication (e.g., “api_key”, “bearer_token”, “basic”)

credentials: HashMap<String, SecretString>

Authentication parameters (e.g., token, key, username, password) Stored as SecretString to prevent exposure in logs, errors, or memory dumps.

Required credentials by auth type:

• api_key: requires key credential
• bearer_token: requires token credential
• basic: requires username and password credentials

Security: Credentials are NOT serialized (skipped during serialization) to prevent accidental exposure in configuration files or logs.

Implementations

impl AuthConfig

pub fn validate(&self) -> Result<(), OtlpConfigError>

Validate authentication configuration

Trait Implementations

impl Clone for AuthConfig

fn clone(&self) -> AuthConfig

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for AuthConfig

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for AuthConfig

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Serialize for AuthConfig

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.