Kubedlv is a small tool to forward command to golang delve command.

In a Kubernetes container, some commands require numerous arguments and subcommands to initiate. Starting a Delve instance can be challenging without modifying the original YAML file. One approach is to have delve attach to the running process. However, this option is often unavailable due to missing Docker capabilities.

You may use go install github.com/imwithye/[email protected] to install kubedlv.

1. Install or copy dlv and kubedlv to the running container.
2. Open the YAML file of the running deployment, and in the command section, add kubedlv as the first command.

For example:

# change this
command:
  - http-server

# to this
command:
  - kubedlv
  - http-server

Now you can attach to port 2345 to start debugging.

The kubedlv simply pipes the original execution command to dlv. It translates

http-server --host 0.0.0.0 --port 8080

to

dlv --api-version=2 --listen=:2345 --headless=true --continue --accept-multiclient exec http-server -- --host 0.0.0.0 --port 8080