Working with Xdebug

[gauravmanerkar]

Hello,

I am getting following warning when xdebug is enabled.
Xdebug: [Step Debug] Could not connect to debugging client.

I am not sure what value to set xdebug.client_host in xdebug.ini.

Please assist

[jandubois]

Xdebug seems to be a PHP tool, so maybe ask the Xdebug community there what this might be?

[gauravmanerkar]

@jandubois
I don't think so.
The IP address or hostname should be provided by Racher Desktop to establish the connection.

[jandubois]

You are missing my point: you are not explaining what you are trying to do, and how it fails. How is somebody who never heard of xdebug supposed to help you without reading your mind?

So I used Google to locate https://xdebug.org/docs/all_settings#client_host, which makes me think this is something that runs inside the VM and needs to connect back to the host. Which means you should use host.docker.internal. This was broken in recent Rancher Desktop for Windows releases, but has been fixed in the 1.14 release.

I've also tested it on macOS, where it works too:

$ rdctl shell ping -c 2 host.docker.internal
PING host.docker.internal (192.168.5.2): 56 data bytes
64 bytes from 192.168.5.2: seq=0 ttl=42 time=0.762 ms
64 bytes from 192.168.5.2: seq=1 ttl=42 time=0.424 ms

If this doesn't work for you, then you need to provide enough information that somebody else can reproduce your problem.

[gauravmanerkar]

Thanks for providing the information.

I am using DDEV (https://ddev.com/) with Racher desktop. DDEV has built in support for xdebug, which i will need to use for code debugging but when i tried to run the commands, i faced this warning

Xdebug: [Step Debug] Time-out connecting to debugging client, waited: 200 ms. Tried: host.docker.internal:9003 (fallback through xdebug.client_host/xdebug.client_port).

Which means xdebug is unable to discover the racher docker host.

I alraedy tried to set xdebug.client_host=host.docker.internal in xdebug.ini file but it doesn't work.

The question is how to connect to host outside rdctl shell.

[jandubois]

I alraedy tried to set xdebug.client_host=host.docker.internal in xdebug.ini file but it doesn't work.

@rfay Do you know what needs to be done? Or is there a bug in Rancher Desktop?

[rfay]

DDEV has no trouble with xdebug and Rancher Desktop.

@gauravmanerkar if you'll please take a look at https://ddev.readthedocs.io/en/stable/users/debugging-profiling/step-debugging/ and go carefully through the troubleshooting steps there I think you'll find a solution. If you don't, please come to the DDEV Discord and we'll help. https://discord.com/invite/5wjP76mBJD

When you come, please do a ddev debug test and provide the results of that, thanks.

[rfay]

I just manually tested DDEV v1.23.3, Rancher Desktop 1.14.1, macOS 14.5, Apple Silicon. Worked first time out of the box, no questions asked.

Please note that no additional configuration is required to use Xdebug with DDEV. If you have done additional configuration (for example in the project .ddev/php folder) please remove it.

[Fenikkusu]

I am late to this party, but figured I'd share for future reference. I use Xdebug with PHPStorm and Rancher Desktop with no issues on PHP 8.2.

I use the below config map and mount it in the deployment using the volume mounts.

# ...
     volumeMounts:
            - mountPath: /usr/local/etc/php/conf.d/yy-xdebug.ini
              name: xdebug
              subPath: xdebug.ini
volumes:         
       - name: xdebug
          configMap:
            name: {{ include "helm.fullname" . }}-php-xdebug

Xdebug Config

apiVersion: v1
kind: ConfigMap
metadata:
    name: {{ include "helm.fullname" . }}-php-xdebug
    labels:
        {{- include "helm.labels" . | nindent 8 }}
data:
    xdebug.ini: |
        [xdebug]
        zend_extension=xdebug.so
        ; Version 3.x
        ; https://xdebug.org/docs/all_settings#mode
        ; This Flag Controls Everything. Setting it to debug,develop enables the common options we are used to seeing.
        ; In order to enable profiling, set the value to 'profile' (Dumps will go to /tmp)
        ;
        xdebug.mode = debug,develop
        xdebug.start_with_request = yes
        xdebug.client_host=host.docker.internal
        xdebug.idekey=PHPSTORM
        xdebug.discover_client_host=true
        xdebug.output_dir=/tmp
        xdebug.profiler_output_name=profile.%t.cachegrind