Jenkins GitLab Community Edition Integration Error-CodePudding

I'm trying to integrate Jenkins (ver. 2.337) for our project on our gitlab.doman.com (GitLab Community Version 13.0.3), and it is deployed and running on Linux Centos on AWS EC2. When I try to test using my GitLab Access Token, it gives me error stating Connection Timed Out. When I try with Gitlab webhooks and SSH Key as credentials instead of Access Token, webhooks execute successfully, but the job on jenkins fails with the below errors.

I am quite new to Jenkins, and CI/CD. So, any guidance or help resolving this issue is greatly appreciated!

Jenkins Console Log:

Started by GitLab push by j****
Running as SYSTEM
Building in workspace /var/lib/jenkins/workspace/xx_xxxxx
The recommended git tool is: NONE
using credential 7c284997-927a-40d9-b1cf-02axxxxxxxxx
 > /usr/bin/git rev-parse --resolve-git-dir /var/lib/jenkins/workspace/xx_xxxxx/.git # timeout=10
Fetching changes from the remote Git repository
 > /usr/bin/git config remote.origin.url [email protected]:xx_xxxxxDetection/xx_xxxxx_detection.git # timeout=10
Fetching upstream changes from [email protected]:xx_xxxxxDetection/xx_xxxxx_detection.git
 > /usr/bin/git --version # timeout=10
 > git --version # 'git version 1.8.3.1'
using GIT_SSH to set credentials GitLab_SSH_Key
 > /usr/bin/git fetch --tags --progress [email protected]:xx_xxxxxDetection/xx_xxxxx_detection.git  refs/heads/*:refs/remotes/origin/* # timeout=10

ERROR: Error fetching remote repo 'origin'
hudson.plugins.git.GitException: Failed to fetch from [email protected]:xx_xxxxxDetection/xx_xxxxx_detection.git
    at hudson.plugins.git.GitSCM.fetchFrom(GitSCM.java:1001)
    at hudson.plugins.git.GitSCM.retrieveChanges(GitSCM.java:1242)
    at hudson.plugins.git.GitSCM.checkout(GitSCM.java:1302)
    at hudson.scm.SCM.checkout(SCM.java:540)
    at hudson.model.AbstractProject.checkout(AbstractProject.java:1215)
    at hudson.model.AbstractBuild$AbstractBuildExecution.defaultCheckout(AbstractBuild.java:645)
    at jenkins.scm.SCMCheckoutStrategy.checkout(SCMCheckoutStrategy.java:85)
    at hudson.model.AbstractBuild$AbstractBuildExecution.run(AbstractBuild.java:517)
    at hudson.model.Run.execute(Run.java:1896)
    at hudson.model.FreeStyleBuild.run(FreeStyleBuild.java:44)
    at hudson.model.ResourceController.execute(ResourceController.java:101)
    at hudson.model.Executor.run(Executor.java:442)
Caused by: hudson.plugins.git.GitException: Command "/usr/bin/git fetch --tags --progress [email protected]:xx_xxxxxDetection/xx_xxxxx_detection.git  refs/heads/*:refs/remotes/origin/*" returned status code 128:
stdout: 
stderr: ssh: connect to host gitlab.sampledomain.co.kr port 22: Connection timed out
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:2671)
    at org.jenkinsci.plugins.gitclient.CliGitAPIImpl.launchCommandWithCredentials(CliGitAPIImpl.java:2096)
    at org.jenkinsci.plugins.gitclient.CliGitAPIImpl.access$500(CliGitAPIImpl.java:84)
    at org.jenkinsci.plugins.gitclient.CliGitAPIImpl$1.execute(CliGitAPIImpl.java:618)
    at hudson.plugins.git.GitSCM.fetchFrom(GitSCM.java:999)
    ... 11 more
ERROR: Error fetching remote repo 'origin'
Finished: FAILURE

CodePudding user response：

A GitLab Access Token would work only for HTTPS URL (replacing your GitLab account password)

If you see Connection timed out both for HTTPS URL and SSH URL ([email protected]:... as in your question), it means gitlab.sampledomain.co.kr is not reachable from the Jenkins controller server which tries to contact your Git repository hosting server.

You need to make sure such a server can do a simple curl -v telnet://gitlab.sampledomain.co.kr:22 or curl -v telnet://gitlab.sampledomain.co.kr:443, before being able to run a service like Jenkins.