Gitlab push to master jenkins trigger

I see this question has been unanswered for over a year, but here is how I solved the problem.

What you want to do is make sure that the user that runs jenkins

1. checks to see if ssh-agent is running (if not, start it)
2. checks to see if a key is loaded (if not, load one)

Put this in your ~/.bash_profile for the user that runs jenkins of the user that needs to forward agent, to ensure it runs with each new shell:

SSH_ENV="$HOME/.ssh/environment"

function start_agent {
  echo "Initializing new SSH agent..."
  /usr/bin/ssh-agent | sed 's/^echo/#echo/' > "${SSH_ENV}"
  echo succeeded
  chmod 600 "${SSH_ENV}"
  . "${SSH_ENV}" > /dev/null
  ssh-add .ssh/id_rsa
  cat .ssh/id_rsa.pub
}

#Source SSH Settings

if [ -f "${SSH_ENV}" ]
then
  . "${SSH_ENV}" > /dev/null
  ps -ef | grep ${SSH_AGENT_PID} | grep ssh-agent > /dev/null || {
    start_agent;
  }
else
  start_agent;
fi

if [ `ssh-add -l | grep "The agent has no identities." | wc -l` == 1 ]
then
  ssh-add .ssh/id_rsa
  cat .ssh/id_rsa.pub
fi

About 50% of the code here I took from somewhere else but can't remember where to give credit. This should be fairly portable, and its use need not be limited to jenkins it should work in any ssh-agent forwarding situation.

gitlab already uses the post-receive hook internally. you could fiddle around with that script and call your hook as well, but from the docs it looks like the "official" way would be to use "web-hooks", i.e. let gitlab call your webserver on post-receive and your webserver then pulls the repository. I haven't tried this myself, but since no one answered so far I thought I'd point you in that direction:

to enable web-hooks go into your project's main page and select hooks from the top right, below the main menu. ( http://yourgitlab.example.net/yourproject/hooks ). there is an example&docs linked from that page ( http://yourgitlab.example.net/help/web_hooks ).

edit://

I tried it this morning. Here is a php script example. It assumes the you have already cloned the repo and the webserver has all the necessary permissions/ssh keys set up.

<?php
$mirrordir='/srv/http/gitlabhooktest/gitmirror';
$gitdir=$mirrordir."/.git";

$json= file_get_contents('php://input');
#error_log($json);
$jsarr=json_decode($json,true);
#error_log(print_r($jsarr,true));
$branch=$jsarr["ref"];
if($branch=='refs/heads/master'){
 $cmd="git --work-tree=$mirrordir --git-dir=$gitdir pull";
 #error_log($cmd);
 exec($cmd);
}