Live GIS Build

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Getting started

The first thing you will have to do is check-out the latest build scripts using Subversion (SVN): 

svn checkout https://svn.osgeo.org/osgeo/livedvd/gisvm/trunk
  • see here for more details.

How to add your project to OSGeo Live

Mounting a Virtual Image

For the purposes of faster dissemination of updates to the Live image via something like rsync you can mount an image file. Make sure you turn off the virtual machine before you attempt to mount it, and that you unmount it before you attempt to run the vm again.

Mount VMWare Server

This method assumes you have vmware server installed, the key is that the vmware-mount script is on your system somewhere. This instructions use /space/virtual as the vmware installation folder and /space/virtual/machines as the location of the disk images. For more information see the VMware mounting guide

  • If it complains about not finding libdir/lib/libcrypto.so.0.9.8/libcrypto.so.0.9.8
  • It's because it's looking for it in your vmware bin/libdir which doesn't exist so symlink
sudo ln -s /space/virtual/lib/vmware/ libdir
  • Temporarily move your .vmx file out of the directory
  • Move to you vmware bin folder
cd /space/virtual/bin/
sudo ./vmware-mount -p /space/virtual/machines/gisvm20090828x.vmdk
  • Should be partition 1
  • Make a directory to mount to somewhere easy to find, in my case where I keep my vm images
mkdir /space/virtual/machines/mountedimage
  • Mount it
sudo ./vmware-mount /space/virtual/machines/gisvm20090828x.vmdk 1 /space/virtual/machines/mountedimage
  • Don't forget to umount when you're done
sudo ./vmware-mount -d /space/virtual/machines/mountedimage

Mount VirtualBox

These instructions have not been tested yet, they require VirtualBox 2.0+ http://forums.virtualbox.org/viewtopic.php?f=7&t=17574

Run the the ISO in a QEMU / KVM Virtual Machine

(Linux host only)

If you have KVM installed use "qemu-kvm" or "kvm" instead of qemu on the command line. The usage is the same. It will be a lot faster. To run KVM you will have to have a newer CPU which supports hardware virtualization, a recent kernel, and have virtualization enabled in the BIOS. You'll want to make sure that the kvm kernel modules are loaded, /dev/kvm exists, and your user account belongs to the 'kvm' group. Older releases of QEMU may be partially accelerated by installing the KQEMU plugin. Without any sort of acceleration it will still run, but very very slowly.

Running live from a bootable ISO file

Specify that at least 512mb of RAM should be used. In this example 720mb has been requested which is a bit more comfortable and the ISO will be run live. 

qemu -m 720 -cdrom osgeo_live.iso

or 

kvm -m 720 -cdrom osgeo_live.iso

For me the mouse didn't work (it was just stuck in the middle of the screen). The fix was to set this environment variable before running kvm: 

export SDL_VIDEO_X11_DGAMOUSE=0

Install to a persistent VM

Create a permanent 5gb VM to work in: 

qemu-img create -f qcow2 livedisc.img 6G

or 

kvm-img create -f qcow2 livedisc.img 6G

Next start kvm with the ISO as the virtual CD drive and the VM image file as the the first hard drive (hda). The "-boot d" option tells it to try to boot from the virtual CD drive first.

(from now on I'll just give the kvm version of the commands)
kvm -hda livedisc.img -cdrom osgeo_live.iso -m 720 -boot d

From within the VM, run the installer either from the boot menu or from the icon on the desktop of the Live OS. You should see the empty 6gb partition you created a few minutes ago. You can decide yourself if you want a swap space partition or not. I didn't, will adjust the -m size on the command line if I need more.

After it has installed you can restart qemu/kvm but without the -cdrom this time: 

kvm -hda livedisc.img -m 720

At this time it might be a good idea to zip up a copy of the VM. If you want to start fresh later you can just delete the working image and replace it with the fresh version you zipped earlier.

Getting in via ssh

(ssh'ing out is trivial)

Instructions on how to ssh into the QEMU/KVM VM can be found in the OLPC wiki.

  • Within the VM install the openssh-server package. This should generate RSA keys.
  • Start the VM on the host with the command line option:
kvm [...] -redir 'tcp:2222::22'
  • This will allow you to ssh to port 2222 on the host machine to get into the VM:
ssh -p 2222 user@127.0.0.1
  • Add the "-nographic" command line option when you start up kvm if you want to start it headless.
  • Add "-X" as a ssh command line option if you want to be able to tunnel X-Window apps from the VM.

Mount the ISO as a readonly filesystem

Not recommeded, it's preferred to get the image right to start, you will not be able to edit files inside the squashfs this way.
 mkdir test_iso
 mount -t iso9660 -o loop,ro livedvd.iso ./test_iso

If you want to do this without su rights, use the FuseISO package. 

fuseiso -p livedvd.iso ./test_iso.$$

Unmount the FuseISO filesystem with: 

fusermount -u ./test_iso.$$

Mount the ISO for changes

If you're on ubuntu to can edit and remaster and ISO with ISOMaster 

sudo apt-get install isomaster

On Windows try Daemon tools and related software.

Creating a fresh Virtual Machine

Refer to: Live_GIS_Virtual_Machine.

Creating the GIS Virtual Machine

Set the Version Number and Changes

Update https://svn.osgeo.org/osgeo/livedvd/gisvm/trunk/VERSION.txt with the current version number.

Update https://svn.osgeo.org/osgeo/livedvd/gisvm/trunk/CHANGES.txt with changes since the last release. This list can be a summary of the revision log between releases

Commit the changes to svn right before a release build.

Copy base virtual machine

Copy the base virtual machine to a new directory and rename it to the current version:

Use the helper script renamevm.sh 

host$ sudo ./renamevm.sh OSGeoLive-4.5base OSGeoLive-4.5rc1
  • Log into the control panel: https://127.0.0.1:8333/ui
  • Go to the menu Virtual Machine -> Add Virtual Machine to Inventory -> and select your OSGeoLive-4.5rc1.vmx
  • Your image can now be started. When prompted select "I copied it"

Or do it By hand 

host$ cd /var/lib/vmware/Virtual\ Machines/
host$ cp -pr OSGeoLive-4.5base/ OSGeoLive-4.5rc1
  • Log into the control panel: https://127.0.0.1:8333/ui
  • Select the base xubuntu image VM: Inventory -> OSGeoLive-4.5rc1
  • Select Summary tab
  • In the "Commands" pane, select "Configure VM"
  • Change the hostname from "arramagong" to a name which includes version number. Eg: "arramagong-3.0-rc2"

Alternative name change:

  • You can change the image name in /var/lib/vmware/Virtual\ Machines/arramagong-3.0-rc2/arramagong.vmx . Update the following line as:
displayName = "arramagong-3.0rc2"

Bootstrap the Live DVD

  • Start the Xubuntu Virtual Machine
  • Open a terminal
  • Copy the bootstrap script into your home directory and execute it
osgeolive$ cd /tmp
osgeolive$ wget https://svn.osgeo.org/osgeo/livedvd/gisvm/trunk/bin/bootstrap.sh
osgeolive$ chmod a+x bootstrap.sh
osgeolive$ sudo ./bootstrap.sh
  • This will install subversion, and the install scripts, and create a link to them from your home directory.

Install all applications

Optional: If you have run through this process a number of times, you might be smart enough to have saved a local copy of the tmp/ directory. You can save time and bandwidth by copying the tmp/ contents onto the live DVD

  • Method 1
sudo rsync -avz username@hostname.org:/path_to_tmp_dir/ /tmp/
sudo mkdir /var/cache/apt
sudo cp /tmp/apt/* /var/cache/apt/
  • Method 2
  1. Create a Virtual Disk with your Virtual Machine software (8-10GB should work).
  2. Attach the disk to your Virtual Machine, it will be something like /dev/sdb1 when you are in the Virtual Machine
  3. Mount the drive as the /tmp folder
sudo mount /dev/sdb1 /tmp

Tip: You may want to uninstall xscreensaver and reboot, as of Xubuntu 11.04 builds it occasionally causes the vm to freeze.

Required:

  • Bring down the graphical user interface.
sudo service lightdm stop
  • Change Directory (cd) to the install scripts directory, and run the main.sh installer. Note, that we log the output into tee, so that we can search for errors later.
cd ~/gisvm/bin
sudo ./main.sh 2>&1 | tee /var/log/osgeolive/main_install.log
  • Answer prompts as they come up, there are a few at the start. Wait for a few hours while everything is downloaded and installed.
  • Save the logs and upload them for viewing
cd
tar czf version-log.tar.gz -C /var/log osgeolive
scp version-log.tar.gz username@yourserver.com:gisvmlogs
  • When finished, and before you shutdown your virtual machine, copy the download directories in /tmp to your local computer. (This is to save you re-downloading the files if you are to run through the process again.)
  • Shutdown the virtual machine and if you used a second drive for tmp, remove it from the config.
  • Boot the machine again and run a zero-ing operation to ensure it will compress.
sudo ./gisvm/bin/zerofill.sh
  • Shutdown the machine again for packaging.
  • The Live DVD should now be ready to test, however if you're going to package it do so before testing.

Virtual Machine specific steps

Take a copy of the Virtual Machine, as you don't want VMWare tools installed on the ISO image (in the next step).

Install VMWare tools

VMWare tools allow cut and paste from the host operating system to a VMWare virtual machine, and also speeds up graphic rendering on VMWare.

In the VMWare browser control panel, select the virtual machine, then "Summary" tab. Turn on the virtual machine, then select "Install VMWare tools". This mounts the vmware-tools scripts in the arramagong virtual machine, so that it can be installed. Which you can do using the following commands: 

osgeolive$ cd /tmp
osgeolive$ tar -zxf /media/cdrom0/VMwareTools-7.7.5-156745.tar.gz
osgeolive$ cd vmware-tools-distrib/
osgeolive$ sudo ./vmware-install.pl
osgeolive$ # answer defaults to all questions

Power off

Then poweroff the virtual machine. (Note that this removes all files in the tmp/ directory). 

arramagong$ sudo halt

Package the VMWare VM

Note: Most of this step is covered in the package.sh script. Check and update the variables in the script before running on an Ubuntu based system.

On the host computer, all temporally files can be removed from the virtual machine folder: log files, ram files, etc. Remove all files EXCEPT: *.vmx (VM definition file) and *.vmdk (virtual disk file)

Shrink the virtual machine: (requires VMWare Server installed) Note: If you get an error from this command, you may need to temporarily rename the *.vmx file before operation and then name it back after 

host$ vmware-vdiskmanager -k *.vmdk

Zip the image up: 

 host$ 7z a -mx=9 ArramagongGISVM2009alpha4.7z ArramagongGISVM2009alpha4/

If the image is greater than 2 Gig, then you also need to split the image. The OSGeo download server isn't configured to accept files of a greater size. 

host$ split -b 1500M ArramagongGISVM2009alpha4.7z ArramagongGISVM2009alpha4.7z

Create the md5sum checksums, so which can be used to confirm that the images have been downloaded correctly: 

host$ md5sum *.7z*

Build the Live DVD ISO image

Build ISO

The ISO will be built as part of the main.sh script and stored in /tmp/remastersys/ . Make sure to copy the ISO onto the osgeo server, and then remove /tmp/remastersys/ or reboot the VM to remove it(must boot up again) before packaging the VM.

  • Run the script to build the ISO without additional files.
sudo ./build_iso.sh mini 2>&1 | tee /var/log/osgeolive/build_iso-mini.log
  • Run the script to build the ISO, this includes downloading close to 1GB of Windows and Mac installers.
sudo ./build_iso.sh 2>&1 | tee /var/log/osgeolive/build_iso.log
  • Once the ISO is complete copy it out to a server (a local server is fastest)
scp /tmp/remastersys/osgeolive-livedvd-2.0-final.iso.md5 user@server.org:destination/path/
scp /tmp/remastersys/osgeolive-livedvd-2.0-final.iso user@server.org:destination/path/
  • And/OR Wget or scp the file to the upload.osgeo.org server (Note wget is much faster if you have a good webserver to host from)

Backup files

Optional: To save time and bandwidth, it is a good idea to back up all the files downloaded into your /tmp directory and the apt-get cache (var/cache/apt), which you can then copy onto future images you create before starting the build process. These files are copied into /tmp/<version>/ during the build process: 

host$ scp -pr user@<arramagong ip>/tmp/3.1alpha1 arragmagong_tmp_3.1alpha1

Alternative Method To Build ISO

This section describes an alternative method for building OSGeoLive as described in official ubuntu wiki. This section is self-contained and there is no need to perform any of the procedures described above.

All you need is a running Ubuntu/Xubuntu/Kubuntu installation (even within a virtual machine as long as it has ~20GB free disk space). All needed to be done are the following steps:

  • Bootstrap the host operating system.
host$ cd /tmp
host$ wget https://svn.osgeo.org/osgeo/livedvd/gisvm/trunk/bin/bootstrap.sh
host$ chmod a+x bootstrap.sh
host$ sudo ./bootstrap.sh

This will install subversion, and the install scripts, and create a link to them from your home directory.

  • Execute the build script:
host$ cd ~/gisvm/bin
host$ sudo ./build_chroot.sh 2>&1 | tee /var/log/osgeolive/chroot-build.log
  • After the completion of the above script the new iso file is located in ~/livecdtmp along with the build logs. In case you wish to rerun the script, do not remove or move the xubuntu official iso located in this folder to skip downloading it again.
  • It would be preferable to reboot your host machine after build is completed
  • You can now use the iso to simply install in a virtual machine in order to get the OSGeoLive VM version. The installation procedure is the same as a normal Ubuntu OS.

Upload to the OSGeo Server

host$ scp -pr osgeolive-gisvm-2.0-alpha5 username@upload.osgeo.org:/osgeo/download/livedvd/

Update the index.html file at: https://svn.osgeo.org/osgeo/livedvd/gisvm/trunk/download/index.html

Check the result at: http://download.osgeo.org/livedvd

Creating a torrent file

Several tools exist for creating torrents. Below are the key settings you need.

Deluge with the torrent creator plugin has been tested.

  • Make sure you have a copy of the file you want to create a torrent for. Mounted remote drives may work.
  • Web Seed - URL to a web server that hosts the file, adds speed to the torrents especially at the start. (Most clients implement this now)
  • Tracker - There are 2 open and free trackers that have been tested, use one or the other as most clients do not handle multiple trackers yet.
http://tracker.openbittorrent.com/announce
udp://tracker.openbittorrent.com:80/announce

OR 

http://tracker.publicbt.com:80/announce
udp://tracker.publicbt.com:80/announce
  • Upload the .torrent file of your iso file for others to grab
  • Start the torrent on your machine or dedicated seeder, so that others have somewhere to start.
  • There is a possibility of seeding from osgeo machines but a Quality of Service (QoS) system would need to be in place to ensure it does not impact other services.

SVN branches and tags

Naming

  • main development happens in "trunk" (aka HEAD)
  • a branch is split off before release time. Bug fixes (only) happen in it and updates like version 2.1 are tagged from it.
its name might be like "arramagong_2"
  • a tag is a snapshot of the svn at some point in time, aka a release name. It does not make sense to checkin fixes to one. They should ideally be set as read-only after creation to prevent this.
its name might be like "release_20090927_arramagong_2_0"

Creating

cd livedvd/gisvm/

svn copy trunk branches/arramagong_2
svn commit branches/arramagong_2 -m "Splitting off branch for 2.x"

cd branches/arramagong_2/bin/
# something like this, maybe need a for loop or xargs:
sed -e 's+gisvm/trunk+gisvm/branches/arramagong_2+g' *.sh | less   # check
sed -i -e 's+gisvm/trunk+gisvm/branches/arramagong_2+g' *.sh       # execute
cd -
 
svn copy branches/arramagong_2 tags/release_20090927_arramagong_2_0_3
svn commit tags/release_20090927_arramagong_2_0_3 -m "tag release 2.0.3"

Merging

To merge a change from trunk into a release branch use "svn merge", as follows: (in this example r2131 from trunk) 

svn up branches/arramagong_2/
cd branches/arramagong_2/

svn merge -c 2131 https://svn.osgeo.org/osgeo/livedvd/gisvm/trunk
svn diff
svn commit -m "bugfix: bikeshed should be orange! (merge from trunk r2131)"

If you do this a lot you might make a little shell script. Here's one called svn_merge_livefromtrunk.sh: 

#!/bin/sh
# Usage: svn_merge_livefromtrunk <rev number>
svn merge -c $1 https://svn.osgeo.org/osgeo/livedvd/gisvm/trunk

See also

Retrieved from "http://wiki.osgeo.org/w/index.php?title=Live_GIS_Build&oldid=65194"