Envoy Proxy Apache Cassandra filter

This is a playground for my experiments with Envoy filter and Apache Cassandra CQL binary protocol. The filter is implemented on top of proxy-wasm-go-sdk and the CQL protocol is based on Datastax go-Cassandra-native-protocol. I love Envoy cause is modular and its filter can be used for different purposes for examples

• Service discovery
• Dynamic forward proxy
• Rate limiting、
• Circuit breaker
• Multi-tenancy
• SQL audit
• Session statistics
• Queries metrics
• etc etc

After some experiments I would like to bring filter in C++ native mode and use datastax/cpp-driver as codec, `At the moment of writing it exports only queries metrics in tiny mode in Prometheus format

Build

The Go SDK for Proxy-Wasm is powered by TinyGo, then before compile project please check it out tinygo

make build

Run

docker-compose -f ./dev-env/docker-compose.yaml up -d
envoy -c envoy.yaml --log-level debug

populate db with ./dev-env/data/cass-populate-tables.sh and then follow commands in ./dev-env/data/verify.txt

curl http://localhost:8001/stats/prometheus | grep -i statements_select 

License

This project is under the Apache 2.0 license. See the LICENSE file for details.

Acknowledgments

• Thanks envoy proxy The great project.
• Thanks proxy-wasm-go-sdk for their sdk.
• Thanks go-cassandra-native-protocol. It Saves me a ton of work and avoid me to make a lot of mistakes.