Attribute Macro micromegas_main 

#[micromegas_main]

micromegas_main: Creates a tokio runtime with proper micromegas tracing callbacks and telemetry setup

This is a drop-in replacement for #[tokio::main] that automatically configures:

• Tokio runtime with proper micromegas tracing thread lifecycle callbacks
• Telemetry guard with sensible defaults (ctrl-c handling, debug level)
• Automatic authentication configuration from environment variables

Authentication

The macro automatically configures telemetry authentication based on environment variables:

• API Key: Set MICROMEGAS_INGESTION_API_KEY=your-key
• OIDC Client Credentials: Set MICROMEGAS_OIDC_TOKEN_ENDPOINT, MICROMEGAS_OIDC_CLIENT_ID, MICROMEGAS_OIDC_CLIENT_SECRET
• No auth: If no env vars are set, telemetry is sent unauthenticated (requires --disable-auth on ingestion server)

Parameters

• interop_max_level: Optional interop max level override (e.g., “info”, “debug”, “warn”)
• max_level_override: Optional max level override (e.g., “info”, “debug”, “warn”)

Examples

use micromegas::tracing::prelude::*;

#[micromegas_main]
async fn main() -> Result<(), Box<dyn std::error::Error>> {
    info!("Server starting - telemetry already configured!");
    Ok(())
}

#[micromegas_main(interop_max_level = "info")]
async fn main() -> Result<(), Box<dyn std::error::Error>> {
    info!("Server starting with info interop level!");
    Ok(())
}

#[micromegas_main(max_level_override = "warn", interop_max_level = "info")]
async fn main() -> Result<(), Box<dyn std::error::Error>> {
    info!("Server starting with both level overrides!");
    Ok(())
}