Developing Istio

Istio Data Plane

istio-proxy

• Debugging Envoy sidecar C++ code in an Istio mesh
  • Introduction
  • My motivation
  • Architecture
  • Environment Assumption
  • Environment construction steps
    • 1. Build istio-proxy with debug info
      • 1.1 Clone source code
      • 1.2 start istio-proxy-builder container
      • 1.3 build istio-proxy
    • 2. Setup testing pod
      • 2.1 Build debug istio-proxy docker image
      • 2.2 run target pod
      • 2.3 start lldb server
        • Test lldb-server(Optional)
    • 3. Attach testing istio-proxy with debuger
      • 3.1 start lldb-vscode-server container
      • 3.2 VSCode attach lldb-vscode-server container
      • 3.3 lldb remote attach Envoy process
        • 3.3.1 Create launch.json
        • 3.3.2 Attach remote process
    • 4. Debuging
  • FAQ
    • containerd allow pull image from plain http docker image registry
    • Dynamic path
    • Why use lldb not gdb
  • More Cloud native flavor of remote debugging
• Debugging and observing the startup of the istio-proxy Envoy sidecar
  • The Difficulty of initialization debugging
  • Envoy’s startup attach method
    • Manually injected istio-proxy container
      • 1. Customizing the istio-proxy environment for manual pull-ups
      • 2. Start remote debug server and vscode debug session
        • 2.1 Setting breakpoints
      • 3. Start pilot-agent and envoy
      • 4. 开始 debug
    • Common breakpoints
  • Appendices - some memos to myself
    • Istio auto inject for sidecar container (I did not use this method)
      • Debugger wait process on worker node
      • Debugger follow process fork
      • Debugger wrapper script
    • Traffic debug
    • lldb common command list

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