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Table of Contents
- Get the Sahana Eden development kit image
- Install VirtualBox
- Import the image into the virtual machine
- Connect to the network
- Start the virtual machine
- You may want to change the dev password.
- Conditionally update Web2py, Eden, and the operating system
- Next steps
- Notes on the configuration
- Notes on using Linux (mainly for non-Linux users)
- Procedure for making a new virtual machine image
Installation Guidelines: Virtual Machine
The most convenient way to get up and running is to use a pre-configured development kit -- a complete operating system that's been set up to include all the required code and tools, and saved as an image of the system's disk -- and run this "virtual system" (sometimes called an "appliance") in a "virtual machine" (VM). The virtual machine runs as an application on your machine -- the "host" machine -- and emulates a separate computer -- the "guest" machine. You won't have to install anything but the virtual machine directly on your system. (We're including the official virtual machine jargon in case you need to read virtual machine documentation. We'll use "VM" to refer to the guest virtual machine. The virtual machine "manager" will be the tool that is used to configure and start your VM.)
Get the Sahana Eden development kit image
- Download the current virtual machine image. Size is 1.2 Gb. Estimated time for download:30 min. Updated: 2012-10-27.
- Note: If clicking the link does not download the file, right-click the link and select "Download Linked File."
- Download the appropriate VirtualBox binary for your system. (You won't need the SDK, and would only need the "extension pack" if you want to use a USB device from your virtual system. You can add it later if so.)
- Run the installer (by whatever means is appropriate for your system).
- Let it install all features.
- Note: The installation will temporarily disconnect your machine from the network.
Import the image into the virtual machine
- Start VirtualBox Manager (or let the installer start it).
- Give VirtualBox Manager the image to run:
- File -> Import Appliance. screenshot
- Click the Open appliance... button. Navigate to the Eden Dev Env L - vb.ovf file and select it. screenshot
- Click Next (or Open, for a Mac).
- (Do not uncheck any options on the appliance options form.)
- Click Import. screenshot
- Wait for the Import process to finish. screenshot Estimated time:5 minutes
Connect to the network
Next tell the VM about your machine's network interface, so the guest can get to the network.
- Scroll down on the right side of VirtualBox Manager until you see Network -- click that.
- If no adapters are enabled, enable adapter 1.
- For "Attached to" select "Bridged Adapter".
- Under that, for "Name", select the appropriate network interface, e.g. wireless if that's what you're using. (Keep this setting in mind -- you may need to change it if you sometimes use a wired network, and sometimes wireless.)
Start the virtual machine
On the left side of the VirtualBox Manager GUI, you should see your new "Eden Dev Env" virtual machine.
- Double-click the virtual machine entry to start it. screenshot
- As it starts up, it may show popups about "mouse / keyboard capture". Check "Don't show this again" and dismiss the popups.
- The Login screen should appear:
- User: dev
- Password: eden
- After you're logged in, the Eclipse IDE will start -- ignore it for the moment.
You may want to change the dev password.
- Start a terminal window by double-clicking the LXTerminal icon.
- To change your password, type
passwdand follow the instructions.
Conditionally update Web2py, Eden, and the operating system
The Eden code is updated (much) more frequently than is the VM image, so the Eden branch supplied in the image will be out of date. So, too, will be Web2py and the Linux distribution, but those will typically not need frequent updating. We recommend only updating Eden, unless you know that new versions of Web2py or the Linux distribution are needed.
- Start a terminal window by double-clicking the !LXTerminal icon.
You will almost certainly want the latest revision of Eden:
cd /home/web2py/applications/eden git pull
If you are working on a specific branch for a particular event (e.g. RHoK), then you can add that branch to your repository:
cd /home/web2py/applications/eden git remote add BRANCHNAME https://github.com/flavour/BRANCHNAME.git git fetch BRANCHNAME
Now you have both, the trunk ("master" branch) and the specific branch ("BRANCHNAME" branch) in your local repo. You can switch between them:
git checkout master or git checkout BRANCHNAME
If, for some reason, you need a specific revision of "master"/trunk, do the following:
cd /home/web2py/applications/eden git checkout <VERSION>
On occasion, the latest revision of Web2py is not stable. Check the topic in the #sahana-eden IRC channel on freenode for the latest known-safe revision. To update Web2py to the latest revision:
cd /home/web2py git pull
To update to a specific revision, do the following with nnnn replaced by the revision you want.
cd /home/web2py git checkout <VERSION>
Optionally update the operating system
Although it's usually good advice to update the operating system and applications to pick up security fixes, updating may lead to incompatibilities with other software, and has been known to render the system unusable. So do the following only if you know there is a security issue, and not when you're in the middle of something critical.
Log in as dev and execute the following:
sudo apt-get update sudo apt-get upgrade
Installation is complete here.
- Run the application using Eclipse's Debug mode.
web2py/applications/eden/models/000_config.pyto say that you've finished editing.
- Access the application using Firefox. To do this, make sure the application is currently running in Eclipse, then open Firefox and select "Sahana Eden local."
- Have a look at the rest of the developer's wiki.
- Try out this familiarization exercise.
Notes on the configuration
These are a few notes on what's included, Linux usage, etc. They're not part of the installation.
Which Linux is this?
The virtual machine image is based on a blueprint and is configured to use about 512MB of RAM. The virtual disk is configured to expand to 20GB. The virtual machine is built on TurnKey Linux's Core, which in turn is based on Ubuntu 10.04 (Lucid -- the most recent long-term support release). The machine runs Shellinabox, Webmin, and SSH/sftp as services from startup.
The development environment uses LXDE, a lightweight desktop environment.
Bridged networking vs. NAT
There are two options for having the host and guest share the physical interface, NAT or bridged. NAT is less obtrusive but bridged provides more capability to the guest. See this discussion of the differences between NAT and bridged modes. The installation procedure shows bridged setup (because everyone who we know who is using VirtualBox is using bridged networking...).
Several useful tools have been installed:
- git - Version control system. Hosting is provided by GitHub
- Firefox with Firebug for examining what is sent to the browser, and viewing HTTP messages sent to and from the browser.
- Eclipse with PyDev for editing and debugging Python code.
- Scripts for updating the Eden code and other tools.
- iPython -- a fancier Python command line than the standard. (Note not everyone prefers this.)
- irssi - IRC chat client more in wikipedia
Notes on using Linux (mainly for non-Linux users)
Web2py is located in /home/web2py. Eden is located in /home/web2py/applications/eden. Eclipse and PyDev are preconfigured with this information.
The root account
The root account is the privileged user on Linux, but you don't need to log in as root to perform privileged tasks like installing software. You can act as root without knowing the root password with the
sudo command -- the dev account has the privilege to
In a terminal window, to execute a command with root privileges:
This will prompt for a password if
sudo hasn't been run recently -- it is asking for the current user's password -- here, that's the dev password.
To change passwords after first boot, log in as dev, start a terminal window, and enter the following commands:
sudo passwd root #change root password passwd #change dev password