What is this?
GoReplay is an open-source network monitoring tool that records your live HTTP traffic and reuses it for shadowing, load testing, monitoring and analysis — so you test with real data instead of synthetic scripts, and deploy with more confidence.
GoReplay is an open-source network monitoring tool that records your live HTTP traffic and reuses it for shadowing, load testing, monitoring and analysis — so you test with real data instead of synthetic scripts, and deploy with more confidence.Does it sit between my users and my app like a proxy?No. It listens in the background on your network interfaces and runs as a daemon on the same machine as your service, so production infrastructure stays untouched and no third-party component enters the request path.
No. It listens in the background on your network interfaces and runs as a daemon on the same machine as your service, so production infrastructure stays untouched and no third-party component enters the request path.How do I get started with it?Download the latest binary or compile it yourself. The most basic run is sudo ./gor --input-raw :8000 --output-stdout, which prints captured traffic like tcpdump; point --output-http at a test environment to replay it there.
Download the latest binary or compile it yourself. The most basic run is sudo ./gor --input-raw :8000 --output-stdout, which prints captured traffic like tcpdump; point --output-http at a test environment to replay it there.Do I need anything else installed to run it?Nothing at runtime — it is a self-contained Go binary you can also build from source (the repo has a Makefile). Capture commands run under sudo, since sniffing raw interface traffic needs elevated privileges.
Nothing at runtime — it is a self-contained Go binary you can also build from source (the repo has a Makefile). Capture commands run under sudo, since sniffing raw interface traffic needs elevated privileges.Will capturing traffic slow down my production service?Avoiding that is the core design goal: GoReplay analyzes and records traffic without affecting it, and because it is not a proxy in the request path, it sidesteps the risks of a third-party component in the critical path.
Avoiding that is the core design goal: GoReplay analyzes and records traffic without affecting it, and because it is not a proxy in the request path, it sidesteps the risks of a third-party component in the critical path.Can I just use it commercially for free?The core is free, but the repository ships a custom, non-standard license (GitHub lists it as NOASSERTION), so check LICENSE before commercial use; a commercial-friendly license is bundled with the paid PRO edition.
The core is free, but the repository ships a custom, non-standard license (GitHub lists it as NOASSERTION), so check LICENSE before commercial use; a commercial-friendly license is bundled with the paid PRO edition.Why replay real traffic instead of writing load test scripts?Because test effort grows exponentially as an app grows, the author's simple idea is to reuse the traffic you already have: it makes tests realistic with zero scripting, which he calls incredibly powerful.
Because test effort grows exponentially as an app grows, the author's simple idea is to reuse the traffic you already have: it makes tests realistic with zero scripting, which he calls incredibly powerful.What does the paid PRO version add?Support for binary protocols like Thrift and ProtocolBuffers, saving and replaying traffic from cloud storage, TCP session replication, plus a commercial-friendly license and dedicated support.
Support for binary protocols like Thrift and ProtocolBuffers, saving and replaying traffic from cloud storage, TCP session replication, plus a commercial-friendly license and dedicated support.Which topics is it in?integration-testing, load-testing, network-monitoring, qa, testing-tools, http, testing, monitoring, command-line, devops, networking, performance
integration-testing, load-testing, network-monitoring, qa, testing-tools, http, testing, monitoring, command-line, devops, networking, performance