Question 1

How do I run a basic HTTP load test with Fortio?

Accepted Answer

Use the command 'fortio load -qps 10 -t 30s http://example.com' to send 10 queries per second for 30 seconds. Fortio will output latency histograms and percentiles like p99 for analysis.

Question 2

Fortio vs k6: which is better for load testing?

Accepted Answer

Fortio excels in lightweight, embeddable load testing with multi-protocol support and minimal dependencies, ideal for CLI and server use. k6 is better for JavaScript-based scripting and cloud-native integrations, offering more flexibility for complex scenarios but with higher overhead.

Question 3

Can Fortio test WebSocket connections?

Accepted Answer

No, Fortio does not natively support WebSocket testing. It focuses on HTTP, gRPC, TCP, and UDP protocols, so for WebSockets, you'd need to use a specialized tool or implement custom logic with its library.

Question 4

How to integrate Fortio with Jenkins for automated testing?

Accepted Answer

You can run Fortio via shell commands in Jenkins pipelines, using the CLI to trigger tests and save JSON results. For advanced integration, leverage its REST API to start tests remotely and parse outputs for reporting.

Question 5

What flags should I use for accurate latency measurements in Fortio?

Accepted Answer

Use '-r 0.0001' for high-resolution histograms and '-uniform' for even request distribution. The README recommends these for best results, especially when testing low-latency services.

Question 6

Does Fortio support OAuth or JWT authentication?

Accepted Answer

Fortio supports basic authentication via the '-user' flag and custom headers with '-H', but for OAuth or JWT, you need to manually add tokens as headers, as it lacks built-in OAuth flow handling.

Question 7

How to use Fortio's echo server to simulate API errors?

Accepted Answer

Start the server with 'fortio server', then access URLs like 'http://localhost:8080/?status=503:10&delay=1s' to return 503 errors 10% of the time with a 1-second delay, useful for testing client resilience.

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