Jenkins repository errors with SSH and git

Posted: 2015-07-06 11:04:23 by Alasdair Keyes

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I've been experimenting with Jenkins continuous integration (CI) suite.

CI seems to be getting widely adopted in businesses so I thought it would be good to familiarise myself with it.

I created a git repo with SSH/key pair access and created a new project in Jenkins. In the project configuration, I was able to connect to the repository with the following URL

ssh://git@X.X.X.X:/home/git/repo/test1.git/

But all my builds were failing with the following message...

Started by user anonymous
Building in workspace /var/lib/jenkins/jobs/test1/workspace
 > git rev-parse --is-inside-work-tree # timeout=10
Fetching changes from the remote Git repository
 > git config remote.origin.url ssh:///git@X.X.X.X:/home/git/repo/test1.git/ # timeout=10
Fetching upstream changes from ssh:///git@X.X.X.X:/home/git/repo/test1.git/
 > git --version # timeout=10
 > git -c core.askpass=true fetch --tags --progress ssh:///git@X.X.X.X:/home/git/repo/test1.git/ +refs/heads/*:refs/remotes/origin/*
ERROR: Error fetching remote repo 'origin'
hudson.plugins.git.GitException: Failed to fetch from ssh:///git@X.X.X.X:/home/git/repo/test1.git/
at hudson.plugins.git.GitSCM.fetchFrom(GitSCM.java:735)
at hudson.plugins.git.GitSCM.retrieveChanges(GitSCM.java:983)
at hudson.plugins.git.GitSCM.checkout(GitSCM.java:1016)
at hudson.scm.SCM.checkout(SCM.java:485)
at hudson.model.AbstractProject.checkout(AbstractProject.java:1282)
at hudson.model.AbstractBuild$AbstractBuildExecution.defaultCheckout(AbstractBuild.java:610)
at jenkins.scm.SCMCheckoutStrategy.checkout(SCMCheckoutStrategy.java:86)
at hudson.model.AbstractBuild$AbstractBuildExecution.run(AbstractBuild.java:532)
at hudson.model.Run.execute(Run.java:1741)
at hudson.model.FreeStyleBuild.run(FreeStyleBuild.java:43)
at hudson.model.ResourceController.execute(ResourceController.java:98)
at hudson.model.Executor.run(Executor.java:381)
Caused by: hudson.plugins.git.GitException: Command "git -c core.askpass=true fetch --tags --progress ssh:///git@X.X.X.X:/home/git/repo/test1.git/ +refs/heads/*:refs/remotes/origin/*" returned status code 128:
stdout: 
stderr: ssh: Could not resolve hostname : Name or service not known
fatal: Could not read from remote repository.

Please make sure you have the correct access rights
and the repository exists.

at org.jenkinsci.plugins.gitclient.CliGitAPIImpl.launchCommandIn(CliGitAPIImpl.java:1591)
at org.jenkinsci.plugins.gitclient.CliGitAPIImpl.launchCommandWithCredentials(CliGitAPIImpl.java:1379)
at org.jenkinsci.plugins.gitclient.CliGitAPIImpl.access$300(CliGitAPIImpl.java:86)
at org.jenkinsci.plugins.gitclient.CliGitAPIImpl$1.execute(CliGitAPIImpl.java:324)
at hudson.plugins.git.GitSCM.fetchFrom(GitSCM.java:733)
... 11 more
ERROR: Error fetching remote repo 'origin'
Finished: FAILURE

Eventually, I noticed that the URL that was being connected during the build had an extra / in the ssh protocol definition.

It turns out that the git pluging does some escaping and ends up adding the extra /, although the Git URL is perfectly valid, it is a sloppy url as the SSH port is not explicitly defined. Change it to

ssh://git@X.X.X.X:22/home/git/repo/test1.git/

And it worked with no issues and proceeded to running the build/test scripts.

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