devcontainers, Docker, SSH credentials, Windows: git-clone fails

Hi Christoph, 

Thanks for raising this. Would you mind sharing your IDE logs as described here + a screenshot of the UI error you're facing? You can upload them to our server and share the ID with us.

Best regards,
Petru
 

Hi Petru,

I created the screenshots and got the relevant parts from the logs, you can find them in 
Upload id: 2026_05_18_4RNpMNk5RmWrULuHCbAdAe (files: Screenshot 2026-05-18 212828.png and 3 more)

The problem is the SSH key used for the git clone (last screenshot, ***/.ssh/id_rsa) is the wrong one, I have several configured.

Best regards,
Christoph

Hello, Info. Unfortunately, the pieces of the logs you shared are not relevant to the problem; please share the full log (or only the idea.log file from the archive) as requested before.

Also, could you please share a non-sensitive part (or structure) of your SSH config? On my side, Git clone with SSH key works without issues, so I believe something may be special in the configuration you use. 

Hi,

this is my SSH config in Windows:

Host git.flexguse.de
    HostName git.flexguse.de
    User xxxxxx
    IdentityFile ~/.ssh/gitea_ed25519

and inside the .ssh folder I have the files

docker_master_rsa
gitea_ed25519
id_rsa
config

I'll provide the complete log this evening.

Thank you for the update; since there is nothing unusual in your config file, I'm waiting for the IDE logs. 

idea.log is now available in Upload id: 2026_05_22_GzrMaaxdASE3GpMpJUSPAj (file: idea.log).

Additionally the devcontainer build-log:
 

Preparing helper container for git clone…
Initializing remote agent…
Computing target platform… done
Copying remote agent binary… done
Cloning into '.'...
yes
Warning: Permanently added '[git.flexguse.de]:2222' (RSA) to the list of known hosts.
git@git.flexguse.de: Permission denied (publickey).
fatal: Could not read from remote repository.
Please make sure you have the correct access rights
and the repository exists.
Performing ssh-add -k command… finished with non-zero exit code 1.

The username for the git repository is not “git”, if this helps.

Info, thank you for sharing the logs. Unfortunately, I wasn't able to find any additional relevant information about the problem you encountered there.
On my side, I had a similar problem with the Git clone via the SSH URL using the non-GitHub repository, which resolved itself after rebooting the laptop. Could you please double-check if rebooting helps? Also, please check if the SSH key was correctly added to the SSH agent via the `ssh-add -l` command.

Hi Olga,

I managed to get it running. Originally I did not use the id_rsa SSH certificate for git. After changing and using id_rsa for Git IntelliJ was able to create a new devcontainer and clone the sources into it.

Rebooting my system did not help ;)

Regards,
Christoph

Info, thank you for the update; glad the problem is solved now!

Please let me know if you have any further questions or requests; I'll be happy to help.