SSH access to Github: shell okay, Jenkins fails

Question

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TLDR: I'm trying to set up a jenkins to read a private Github repository. When I use jenkins credentials with username/password it works, when I use jenkins credentials with a private key it does not and I'm getting an "invalid username / or password" error.

Full description:

1. I have a jenkins 2.5 installed on apache-tomcat 8, jenkins is running under the user tomcat8. Credential plugin (2.1.4), Git client plugin (1.19.6), Gitplugin (2.5.2), Github API Plugin (1.76), GitHub plugin (1.19.2), SSH credential plugin (1.12) are also installed. Git is running in version 2.1.4
2. I've created an ssh-keypair with empty password for the user tomcat8 [logged in as tomcat8 via sudo -su tomcat8]
3. I've added the public key to the private Github repository
4. I've created a jenkins credentials ssh username with private key with global scope, username tomcat8, empty password and the full private key from -----BEGIN RSA PRIVATE KEY----- to -----END RSA PRIVATE KEY-----
5. I'v created a jenkins creditals "username / password" with the plain username and passwort of the github account.

6. When I log into the user tomcat8 and check the github authentication via shell with the command ssh -T [email protected] I get the correct output. That means my authentication with the key against github works (right?)

   tomcat8@ci:~/.ssh$ ssh -T [email protected] Hi github-username! You've successfully authenticated, but GitHub does not provide shell access.

Wenn I now setup my jenkins job: repository URL: https://github.com/repoownername/reponame.git and use the username/passwort-credential the access is fine. But when I use the ssh-credentials the authentication failes with

Failed to connect to repository : Command "git -c core.askpass=true ls-remote -h https://github.com/repoownername/reponame.git HEAD" returned status code 128: stdout: stderr: remote: Invalid username or password. fatal: Authentication failed for 'https://github.com/repoownername/reponame.git'

Further information When I run a build with the username/password credentials

git config remote.origin1.url https://github.com/repoownername/reponame.git # timeout=10 Fetching upstream changes from https://github.com/repoownername/reponame.git using .gitcredentials to set credentials git config --local credential.username github-username # timeout=10 git config --local credential.helper store --file=/tmp/tomcat8-tomcat8-tmp/git1018128562913260002.credentials # timeout=10 git -c core.askpass=true fetch --tags --progress https://github.com/repoownername/reponame.git +refs/heads/:refs/remotes/origin1/ git config --local --remove-section credential # timeout=10

When I use the SSH credentials I get the the error mentioned above.

So my question is now: How can I successfully use my SSH-credentials instead of Username/Password

Some of the tutorials I checked:

• https://help.github.com/articles/error-permission-denied-publickey/
• https://gist.github.com/misterbrownlee/3708738
• http://fourkitchens.com/blog/article/trigger-jenkins-builds-pushing-github
• https://nicolas.perriault.net/code/2011/setup-jenkins-github-private-repository-ubuntu/

Answer 1

Oh man I'm some kind of stupid.

My error was that I used the wrong URL of my repository! I had used:

https://github.com/repoownername/reponame.git which works fine when using the username/password credentials.

But for SSH-Acess I had to use

[email protected]:repoownername/reponame.git