Hi,

I'm currently using the multi-branch project plugin with a specific user's github credentials.
in "configure" for my folder, under "Source Code Management" I choose "Git", and provide:
the project repository: https://github.com/org/project.git
credentials: I choose my user's github credentials.

I'm trying to use Github's deploy keys instead of my user's credentials.

I configured deploy keys for our freestyle projects, similar to what's defined here

When I change the "Source Code Management"
project repository to: git@github-project:org/project.git
credentials to: "private key" -> "From the Jenkins master ~/.ssh".

this configuration works for a freestyle project, but for multi-branch I get the following error when saving the configuration.

looking at the stack trace, "java.net.UnknownHostException: github-project: Name or service not known" it seems that there is some issue with the ssh connection.

github-project is not an host, but an alias configured in ssh config as following:

Host github-project
HostName github.com
User git
IdentityFile /var/lib/jenkins/.ssh/id_rsa_project

I also tried the following project repository configurations:

• github-project:org/project.git (removed the git@ prefix)
• github.com:org/project.git (using github.com instead of the ssh alias)

and both failed with differet errors.

Started by timer
Setting origin to github-project:org/project.git
Fetching origin...
FATAL: Failed to recompute children of test-project-feature-branches
hudson.plugins.git.GitException: org.eclipse.jgit.api.errors.TransportException: github-project:org/project.git: Failed to connect
at org.jenkinsci.plugins.gitclient.JGitAPIImpl.fetch(JGitAPIImpl.java:680)
at jenkins.plugins.git.AbstractGitSCMSource.retrieve(AbstractGitSCMSource.java:174)
at jenkins.scm.api.SCMSource.fetch(SCMSource.java:143)
at jenkins.scm.api.SCMSource.retrieve(SCMSource.java:219)
at jenkins.scm.api.SCMSource.fetch(SCMSource.java:169)
at com.github.mjdetullio.jenkins.plugins.multibranch.AbstractMultiBranchProject.computeChildren(AbstractMultiBranchProject.java:583)
at com.cloudbees.hudson.plugins.folder.computed.ComputedFolder.updateChildren(ComputedFolder.java:157)
at com.cloudbees.hudson.plugins.folder.computed.FolderComputation.run(FolderComputation.java:122)
at hudson.model.ResourceController.execute(ResourceController.java:98)
at hudson.model.Executor.run(Executor.java:410)
Caused by: org.eclipse.jgit.api.errors.TransportException: github-project:org/project.git: Failed to connect
at org.eclipse.jgit.api.FetchCommand.call(FetchCommand.java:139)
at org.jenkinsci.plugins.gitclient.JGitAPIImpl.fetch(JGitAPIImpl.java:678)
... 9 more
Caused by: org.eclipse.jgit.errors.TransportException: github-project:org/project.git: Failed to connect
at org.jenkinsci.plugins.gitclient.trilead.TrileadSessionFactory.getSession(TrileadSessionFactory.java:54)
at org.eclipse.jgit.transport.SshTransport.getSession(SshTransport.java:136)
at org.eclipse.jgit.transport.TransportGitSsh$SshFetchConnection.<init>(TransportGitSsh.java:262)
at org.eclipse.jgit.transport.TransportGitSsh.openFetch(TransportGitSsh.java:161)
at org.eclipse.jgit.transport.FetchProcess.executeImp(FetchProcess.java:136)
at org.eclipse.jgit.transport.FetchProcess.execute(FetchProcess.java:122)
at org.eclipse.jgit.transport.Transport.fetch(Transport.java:1138)
at org.eclipse.jgit.api.FetchCommand.call(FetchCommand.java:130)
... 10 more
Caused by: java.io.IOException: There was a problem while connecting to github-project:22
at com.trilead.ssh2.Connection.connect(Connection.java:818)
at com.trilead.ssh2.Connection.connect(Connection.java:687)
at com.trilead.ssh2.Connection.connect(Connection.java:587)
at org.jenkinsci.plugins.gitclient.trilead.TrileadSessionFactory.getSession(TrileadSessionFactory.java:29)
... 17 more
Caused by: java.net.UnknownHostException: github-project: Name or service not known
at java.net.Inet6AddressImpl.lookupAllHostAddr(Native Method)
at java.net.InetAddress$1.lookupAllHostAddr(InetAddress.java:922)
at java.net.InetAddress.getAddressesFromNameService(InetAddress.java:1316)
at java.net.InetAddress.getAllByName0(InetAddress.java:1269)
at java.net.InetAddress.getAllByName(InetAddress.java:1185)
at java.net.InetAddress.getAllByName(InetAddress.java:1119)
at java.net.InetAddress.getByName(InetAddress.java:1069)
at com.trilead.ssh2.transport.TransportManager.createInetAddress(TransportManager.java:165)
at com.trilead.ssh2.transport.TransportManager.establishConnection(TransportManager.java:353)
at com.trilead.ssh2.transport.TransportManager.initialize(TransportManager.java:467)
at com.trilead.ssh2.Connection.connect(Connection.java:758)
... 20 more
Finished: FAILURE