tracing-viewer

tracing-viewer is a beautiful trace explorer with filtering capabilities. To be used along with Rust's tracing-subscriber.

2025-10-09.13-07-33.1.mp4

Preparation

tracing-viewer currently expects a list of JSON objects as input. Luckily, tracing-subscriber comes with built-in JSON support. In my PS1 emulator I set it up like this:

let fmt_layer = tracing_subscriber::fmt::layer()
    .without_time()
    .json()  // <-- enable JSON!
    .with_filter(targets);
tracing_subscriber::registry().with(fmt_layer).init();

The project also requires a MongoDB running with admin:admin as default login. You can spin up a temporary database using Docker (note: the --rm will remove the container once the database shuts down!):

docker run --rm -p 27017:27017 -e MONGO_INITDB_ROOT_USERNAME=admin -e MONGO_INITDB_ROOT_PASSWORD=admin mongo

The ingestor will take care of everything else like creating the unique key cache, collections and indexes.

Building

# frontend
cd ./frontend && npm run build

# ingestor
cd ./ingestor && cargo build --release

Usage

Basically just pass the file as argument to the ingestor:

# ingest data into database
./ingestor ./path/to/trace.dump

# run the frontend
npm start