Configuring Neovim for Cilium Debugging

Cilium provides an instrumented Kind deployment which binds DAP debugging ports to the localhost.

The vscode editor will discover a file named .vscode/launch.json in a project's root directory and configure vscode's debugger panel with the necessary information to connect to these ports for debugging without any configuration needed by the user.

We've devised a way for this to seamlessly work with Neovim as well.

The following plugins are required:

nvim-dap - the DAP client

nvim-dap-ui - the UI elements for interfacing with nvim-dap

nvim-dap-projects - a configuration discovery mechanism for nvim-dap configuration.

You can use your favorite plugin manager but here is an example configuration using Plug

call plug#begin('~/.config/nvim/plugins')
    Plug 'mfussenegger/nvim-dap'
    Plug 'rcarriga/nvim-dap-ui'
    Plug 'ldelossa/nvim-dap-projects'
call plug#end()
lua require('nvim-dap-projects').search_project_config()

Once all three plugins are installed you should make a call to lua require('nvim-dap-projects').search_project_config().

This function will find the nvim-dap.lua file in the Cilium repository and load it.

You can now use nvim-dap as normal.

This README will not be a nvim-dap tutorial but for a quick test you can create a breakpoint in your Cilium source code with the command DapToggleBreakpoint and then issue the command DapContinue. A UI should pop up asking you to select one of several Kind nodes to connect to for debugging.