gitlab改版了，故运维同事们又迁移了jenkins，原本配好的可以成功打包的项目打包失败了。
输出错误日志

Started by user lhy
Building in workspace /usr/share/tomcat8/.jenkins/workspace/zxpm
 > git rev-parse --is-inside-work-tree # timeout=10
Fetching changes from the remote Git repository
 > git config remote.origin.url git@192.168.1.2:web/zxpm.git # timeout=10
Fetching upstream changes from git@192.168.1.2:web/zxpm.git
 > git --version # timeout=10
using GIT_SSH to set credentials 
 > git -c core.askpass=true fetch --tags --progress git@192.168.1.2:web/zxpm.git +refs/heads/*:refs/remotes/origin/*
ERROR: Error fetching remote repo 'origin'
hudson.plugins.git.GitException: Failed to fetch from git@192.168.1.2:web/zxpm.git
    at hudson.plugins.git.GitSCM.fetchFrom(GitSCM.java:799)
    at hudson.plugins.git.GitSCM.retrieveChanges(GitSCM.java:1055)
    at hudson.plugins.git.GitSCM.checkout(GitSCM.java:1086)
    at hudson.scm.SCM.checkout(SCM.java:485)
    at hudson.model.AbstractProject.checkout(AbstractProject.java:1269)
    at hudson.model.AbstractBuild$AbstractBuildExecution.defaultCheckout(AbstractBuild.java:604)
    at jenkins.scm.SCMCheckoutStrategy.checkout(SCMCheckoutStrategy.java:86)
    at hudson.model.AbstractBuild$AbstractBuildExecution.run(AbstractBuild.java:529)
    at hudson.model.Run.execute(Run.java:1741)
    at hudson.maven.MavenModuleSetBuild.run(MavenModuleSetBuild.java:531)
    at hudson.model.ResourceController.execute(ResourceController.java:98)
    at hudson.model.Executor.run(Executor.java:410)
Caused by: hudson.plugins.git.GitException: Command "git -c core.askpass=true fetch --tags --progress git@192.168.1.2:web/zxpm.git +refs/heads/*:refs/remotes/origin/*" returned status code 128:
stdout: 
stderr: Permission denied, please try again.
Permission denied, please try again.
Permission denied (publickey,password).
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:1740)
    at org.jenkinsci.plugins.gitclient.CliGitAPIImpl.launchCommandWithCredentials(CliGitAPIImpl.java:1476)
    at org.jenkinsci.plugins.gitclient.CliGitAPIImpl.access$300(CliGitAPIImpl.java:63)
    at org.jenkinsci.plugins.gitclient.CliGitAPIImpl$1.execute(CliGitAPIImpl.java:314)
    at hudson.plugins.git.GitSCM.fetchFrom(GitSCM.java:797)
    ... 11 more
ERROR: null
Finished: FAILURE

错误日志是我解决问题时找到跟我一模一样的错误信息（http://blog.csdn.net/lusyoe/article/details/52782368） ，不过他这个方法没有解决我的问题症结所在。
抓住重要信息：
stdout:
stderr: Permission denied, please try again.
Permission denied, please try again.
Permission denied (publickey,password).
fatal: Could not read from remote repository.
Please make sure you have the correct access rights
and the repository exists.

看这个说明是用户访问权限的问题。
一开始琢磨还以为是选择的用户没有登录gitlab的权限，可是不是，因为之前jenkins打包是正常的，也是用的同样的配置用户。
后来查找资料才发现，原来我在gitlab上配置的sshkey是用我的电脑我的用户生成的，而用jenkins打包的是在另外一台电脑上，故使用jenkins打包的电脑用户生成ssh公钥私钥来配置就可以了。
参照：http://www.jianshu.com/p/ed0edb93e234