Runtime command socket for debugging purpose

Goal

Dataplaneapi provides a command socket for debugging purpose.

The path for this socket can be defined :

• as dataplaneapi process argument (--debug-socket-path). Refer to dataplaneapi README
• in the dataplaneapi configuration file. Refer to configuration file

Note : if --debug-socket-path* is not set, the command socket will not run.

Check the socket path at start up

You can check the socket path when starting dataplaneapi in the logs:

"level":"info","msg":"-- command socket Starting on /path/to/dataplane-debug.sock","time":"2023-09-13T11:44:08+02:00"}

Help

To display the available comands:

echo "help" | socat  - /path/to/dataplane-debug.sock

will output:

Dataplaneapi runtime commands:
           conf   show HAProxy configuration
     goroutines   display number of goroutines
          stack   output stack trace
        version   show dataplaneapi version
          pprof   pprof dumps
       dapiconf   show dataplaneapi configuration

type help <command> for more info

To get more info on a command, for example on the conf command:

echo "help conf" | socat  - /path/to/dataplane-debug.sock

will output:

Dataplaneapi runtime

command conf:
conf                                      show HAProxy current raw configuration
conf raw version [transactionID]          show HAProxy raw configuration for version (transactionID is optional default "" (for a transactionID, put '0' for version))
conf structured                           show HAProxy current structured configuration
conf structured version [transactionID]   show HAProxy structured configuration for version (transactionID is optional default "" (for a transactionID, put '0' for version))

Available commands

-conf to show the HAProxy configuration (possibly for version/transaction):

• conf: for current raw version
• conf raw: for current raw version
• conf structured for current structured version Adding version [transactionID] to conf raw or conf structured allow to show the configuration for a given version or transaction. Note that for a transactionID, version should be 0, for example : conf raw 0 123-456-789
• dapiconf for the dataplaneapi configuration
• gouroutines for the number of goroutines
• stack for the stack trace
• version for the dataplaneapi version
• pprof for pprof dumps

More info for : pprof

To have some examples on how to use pprof, the following command will give you some good guidance:

echo "pprof examples" | socat  - /path/to/dataplane-debug.sock

More info for: dapiconf

dapiconf dumps the Configuration. You can find an example of the output, when the dataplane is run with -f example-full.yaml dapiconf output