How to install Jenkins on Scientific Linux for Flex Development

Jenkins is an open source continuous integration server. Here’s how to set it up on Linux for managinf as3/flex applications/modules/libraries:

Installation

1. Install Jenkins:
   
   sudo wget -O /etc/yum.repos.d/jenkins.repo http://pkg.jenkins-ci.org/redhat/jenkins.repo
   sudo rpm --import http://pkg.jenkins-ci.org/redhat/jenkins-ci.org.key
   yum install jenkins 

   sudo wget -O /etc/yum.repos.d/jenkins.repo http://pkg.jenkins-ci.org/redhat/jenkins.repo
   sudo rpm --import http://pkg.jenkins-ci.org/redhat/jenkins-ci.org.key
   yum install jenkins 

2. Install Flash Player for running Unit tests:
   in your sdk folder find: /runtimes/player/10/lnx/flashplayer.tar.gz
   Extract the contents and add flashplayer to the path.
   Try sudo -u jenkins flashplayer on the commandline to verify that it’s working correctly.
   You might need to chmod/chown it.
3. Install XVNC Plugin In Jenkins:
   Go to Jenkins>Manage Jenkins>Mange Plugins>Available
   Find XVNC, select it and click install.
4. Install a vnc server on the box:
   yum -y install tigervnc-server
5. Set up the vnc password for Jenkins:
   sudo vncpasswd /var/lib/jenkins/.vnc/passwd
Password:
Verify:

Start/Stop Jenkins

• sudo service jenkins start
• sudo service jenkins stop
• sudo service jenkins restart

Default Jenkins Config

If you installed jenkins using the steps above, you should have the following default configuration:

• The default Jenkins installation folder is:
  /var/lib/jenkins
• If you reboot your box, Jenkins will be automatically started as a daemon. To change/remove this, edit: /etc/init.d/jenkins
• A jenkins user is created.
• The default jenkins url is: http://localhost:8080

Troubleshooting

• Error:
  
  Caused by: java.io.IOException: Cannot run program "xvfb-run": java.io.IOException: error=2, No such file or directory

  Caused by: java.io.IOException: Cannot run program "xvfb-run": java.io.IOException: error=2, No such file or directory

  Solution:
  yum install Xvfb
  or use xvnc…

• Error:
  
  Failed to launch Flash Player. Probably java was not able to find flashplayer.

  Failed to launch Flash Player. Probably java was not able to find flashplayer.

  
  Solution:
  1. in your sdk folder find: /runtimes/player/10/lnx/flashplayer.tar.gz
  Extract the contents and add flashplayer to the path.

• Error:
  [WARNING] [LAUNCHER] Using xvfb-run to launch headless tests [ERROR] Failed to delete Xvfb locking files, does the current user has access? java.io.IOException: File /tmp/.X11-unix/X0 unable to be deleted.
  Solution:
  change the ownership to the jenkins user:
  sudo chown -R jenkins:jenkins /tmp/.X11-unix
• Error:
  
  [ERROR] Unexpected return code 127/var/lib/jenkins/workspace/...

  [ERROR] Unexpected return code 127/var/lib/jenkins/workspace/...

  Solution:
  Xvfb is not configured correctly.
  I found it easier to install XVNC Plugin In Jenkins:
  Go to Jenkins>Manage Jenkins>Mange Plugins>Available
  Find XVNC and install it.
  2. Install a vnc server:
  yum -y install tigervnc-server

• Error:
  
  $ vncserver :15 You will require a password to access your desktops. getpassword error: Invalid argument Password:ERROR: Failed to parse POMs java.io.IOException: Failed to run 'vncserver :15' (exit code 1), blacklisting display #15; consider checking the "Clean up before start" option

  $ vncserver :15 You will require a password to access your desktops. getpassword error: Invalid argument Password:ERROR: Failed to parse POMs java.io.IOException: Failed to run 'vncserver :15' (exit code 1), blacklisting display #15; consider checking the "Clean up before start" option

  Solution:
  use vncpasswd to create a default password:
  vncpasswd /var/lib/jenkins/.vnc/passwd