OpenResety Edge Jun 17, 2025

OpenResety Edge Updated Jun 17, 2025 5 mins read

High-Performance Web Application Firewall (WAF) in OpenResty Edge

tutorial openresty-edge authentication waf

• Enable WAF for applications
• Test the WAF settings of applications
• Disable and re-enable WAF
• WAF whitelist
• Change the block action after a WAF hit
• Test the new block action
• Create WAF rule set
• The implementation of WAF in OpenResty Edge

OpenResety Edge Jun 17, 2025

OpenResety Edge Updated Jun 17, 2025 5 mins read

The EdgeLang DSL in OpenResty Edge

tutorial openresty-edge proxy

• Introduction to Edgelang
• Add a page rule defined using Edgelang
• Test
• Modify the Edgelang definition of the page rule
• Define WAF rules using Edgelang
• Edgelang user manual

OpenResty Open Source Apr 21, 2023

OpenResty Open Source Updated Apr 21, 2023 2 mins read

OpenResty 1.21.4.2 RC1 is out

OpenResty releases

• Source package
• Windows binary packages
• Version highlights

OpenResety Edge Jun 17, 2025

OpenResety Edge Updated Jun 17, 2025 5 mins read

How to pass the real client IP addresses to backend servers via special request headers

tutorial openresty-edge

• Set up page rules for applications
• Test

OpenResty XRay Jun 17, 2025

OpenResty XRay Updated Jun 17, 2025 6 mins read

When Lua IPC Pipes Block OpenResty or Nginx's Event Loops

openresty-xray nginx lua openresty off-cpu

• The Problem
• Analyses
• Solutions
• Results

OpenResty XRay Jun 17, 2025

OpenResty XRay Updated Jun 17, 2025 26 mins read

The Wonderland of Dynamic Tracing (Part 1 of 3)

dynamic-tracing openresty-xray

• Dynamic Tracing
• What It Is
• Too Good to be True?
• How it Works
• Still Having Doubts?
• The Advantages of Dynamic Tracing
• DTrace
• SystemTap
• DTrace and SystemTap
• Applications of SystemTap in Production

OpenResty XRay Jun 17, 2025

OpenResty XRay Updated Jun 17, 2025 15 mins read

The Wonderland of Dynamic Tracing (Part 2 of 3)

dynamic-tracing openresty-xray

• Flame Graphs
• Methodology
• Knowledge Is Power
• Open-Source and Debug Symbols

OpenResty XRay Jun 17, 2025

OpenResty XRay Updated Jun 17, 2025 7 mins read

The Wonderland of Dynamic Tracing (Part 3 of 3)

dynamic-tracing openresty-xray

• Dynamic Tracing Support in Linux Kernels
• Hardware Tracing
• Analyze Remains of Dead Process
• Traditional Debugging Technologies
• A Messy World of Debugging
• OpenResty XRay

OpenResty XRay Jun 17, 2025

OpenResty XRay Updated Jun 17, 2025 8 mins read

Optimize Memory Fragmentation due to Huge Nginx Configuration

openresty-xray reports cdn nginx openresty memory-fragmentation

• Challenges
• Analyses
• Solutions
• Results

OpenResty XRay Feb 7, 2023

OpenResty XRay Updated Feb 7, 2023 1 min read

New FAQ Doc for OpenResty XRay

openresty-xray faq

We recently prepared a new FAQ document for OpenResty XRay

OpenResty XRay Aug 28, 2023

OpenResty XRay Updated Aug 28, 2023 10 mins read

Automatic Analysis Reports in OpenResty XRay

openresty-xray reports

• The Past
• The Present
• The Future

OpenResty XRay Jun 27, 2025

OpenResty XRay Updated Jun 27, 2025 6 mins read

Resolving Bilibili’s major site incident with OpenResty XRay

dynamic-tracing openresty-xray bilibili

• The incident
• Process of resolution
• Hardening after the incident
• OpenResty XRay Services

OpenResty XRay Jun 17, 2025

OpenResty XRay Updated Jun 17, 2025 11 mins read

Tracing the Slowest PCRE Regular Expressions in OpenResty or Nginx Processes

openresty regexes openresty-xray dynamic-tracing nginx

• System Environment
• Narrowing Down the Culprit without Guessing
• Limiting the execution overhead of PCRE
• Non-Backtracking Regular Expression Engines
• Lua’s Builtin Patterns
• Tracing Applications inside Containers
• How The Tools are Implemented
• The Overhead of the Tools

OpenResty XRay Jun 17, 2025

OpenResty XRay Updated Jun 17, 2025 9 mins read

Listing Loaded Lua Modules in OpenResty or Nginx Processes

ylua openresty-xray openresty nginx lua dynamic-tracing

• System Environment
• Names of Loaded Lua Modules
• Running Directly in the Web Console
• Tracing Applications inside Containers
• How The Tools are Implemented
• The Overhead of the Tools

OpenResty XRay Jun 17, 2025

OpenResty XRay Updated Jun 17, 2025 12 mins read

Analyzing the Most CPU-Consuming Requests in OpenResty or Nginx

openresty tutorial cpu nginx openresty-xray ysql

• System Environment
• CPU-Hottest Request Hostnames
• CPU-Hottest Request URIs
• Digging Deeper
• Running Directly in the Web Console
• Tracing Applications inside Containers
• How The Tools are Implemented
• The Overhead of the Tools

OpenResety Edge Jun 17, 2025

OpenResety Edge Updated Jun 17, 2025 6 mins read

Configure HTTP basic auth in OpenResty Edge

tutorial openresty-edge authentication basic-auth

• Configure the HTTP basic auth credentials for applications
  • Add a basic auth user group
  • Enable the basic authentication
  • Test
• Configure the global HTTP basic auth
  • Add a global basic auth user group
  • Configure the global auth for application

OpenResety Edge Jun 17, 2025

OpenResety Edge Updated Jun 17, 2025 6 mins read

How to use custom dynamic metrics in OpenResty Edge

tutorial openresty-edge metrics monitor

• Introduction to dynamic metrics
• Create custom dynamic metrics for the sample application
• Test

OpenResety Edge Jun 17, 2025

OpenResety Edge Updated Jun 17, 2025 5 mins read

Limit Request Rate by Custom Keys in OpenResty Edge

tutorial openresty-edge proxy rate-limit dos-attacks

• Add request rate limiting page rule for the sample application
• Test
• Limit the rate of SSL handshakes

OpenResty XRay Jun 17, 2025

OpenResty XRay Updated Jun 17, 2025 14 mins read

Ylang: Universal Language for eBPF, Stap+, GDB, and More (Part 4 of 4)

ylang openresty-xray dynamic-tracing

• Transparent Container Tracing
• Efficient Stack Unwinding
• Analyzing Dead Processes (Core Dumps)
• Very Low Tracing Overhead
• Standard Ylang Libraries & Tools
• Network Filtering & Control
• The Ylang Compiler’s Implementation
• Operating System Support
• Contributions to Open-Source Communities

OpenResty XRay Jun 17, 2025

OpenResty XRay Updated Jun 17, 2025 10 mins read

Ylang: Universal Language for eBPF, Stap+, GDB, and More (Part 3 of 4)

ylang openresty-xray dynamic-tracing

• The Language Syntax (Continued)
  • String Literals
  • Built-in Regex Support
  • Full Control-Flow Support
  • Floating-Point Number Support
  • Compared to Open-Source Toolchains
• Transparent Debug Symbol Handling
  • Debug Symbols: No Runtime Overhead
  • Centralized Package Database
  • Fuzzy Matching Debug Symbols