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Developer Studio uses Docker to provide a Legato toolchain to Windows.
Docker is available in a Virtual Machine running in VirtualBox.
(Virtual Machine will be called VM in this document)
How to check if my Windows has Virtualization enabled?
Developer Studio Windows installer automatically checks if virtualization option is enabled in the BIOS.
If your install is starting, the option is enabled in the BIOS.
Docker Machine setup
Docker Machine is a command-line tool used to manage "machines" able to provide a Docker server.
Developer Studio is bundling its compatible version of Docker Machine, so there is no need to install it separately.
The only dependency is VirtualBox, which is installed by the Developer Studio Windows installer.
What if VirtualBox is already installed?
If you already have VirtualBox installed, you may not have to re-install it.
But please note that Docker Machine 0.6.0 is tested to be stable with a VirtualBox version greater or equals to 5.0.14, so if your VirtualBox is outdated you should update it.
Custom Docker Machine VM
Developer Studio will use its own legato Docker Machine and VM instance to handle Legato application builds.
You can check if the VM is correctly created by starting VirtualBox GUI from the Start menu (on Windows). If you see an instance named legato, the VM has been created.
Note: former versions of Developer Studio were using Boot2Docker, with another VM instance. If you still see a legato-boot2docker-vm VM in VirtualBox, you can safely remove it.
How-to access your Docker machine
To get a shell inside the VM, you have two ways.
The easy way is to start the VM directly using VirtualBox GUI
The complex way uses Docker Machine CLI to directly login via SSH an already running VM
docker-machine start legato
docker-machine restart legato
docker-machine ssh legato docker images
docker-machine ssh legato
What if your Docker machine doesn't start?
You have several options to try when your Docker Machine VM doesn't start (either from Developer Studio or from the command line):
docker-machine env legato --cmd shell
docker-machine regenerate-certs legato
docker-machine rm legato
docker-machine -D start legato
Do I have to keep the Legato VM in VirtualBox?
Nothing important is stored in this VM, you can delete it whenever you want. Developer Studio will re-create it, start it and download all the Docker images it needs automatically.
Your Developer Studio workspace is shared with the VM.
So you build your projects with Docker directly in your workspace on Windows.
You may want to run some commands from the VM for troubleshooting.
Developer Studio needs 3 images to build your Legato projects
Check what are fetched images and running containers in the Docker machine
Developer Studio integrates tooling from the Eclipse community to have a look into the Docker machine.
Just open the Docker Images and Docker Containers view in Developer Studio.
How-to manually use docker images
You need to login the VM, see how-to in the previous section.
When you have a prompt inside the VM, use the command docker images to list all images that have already been downloaded.
docker@boot2docker:~$ docker images
REPOSITORY TAG IMAGE ID CREATED VIRTUAL SIZE
legato/ds-runtime a cd6118b47bcf 5 weeks ago 395.7 MB
legato/framework 15.05.0.Beta e42fdbe991dd 5 weeks ago 91.36 MB
legato/toolchain 1.6.2.fw_SWI9X15A_06035400-wp7-x86_64-201506091530 40e185980c6e 5 weeks ago 548.3 MB
To download manually an image
docker@boot2docker:~$ docker pull legato/framework:15.05.0.Beta
Pulling repository legato/framework
e42fdbe991dd: Download complete
cf2616975b4a: Download complete
6ce2e90b0bc7: Download complete
8c2e06607696: Download complete
ed18f45c78ce: Download complete
Status: Image is up to date for legato/framework:15.05.0.Beta
To clean your VM you could delete all containers (keep in mind that Nothing important is stored in this VM, you won't loose any important data).
docker@boot2docker:~$ docker ps -aq | xargs docker rm -vf
The workspace folder is shared with the VM via VirtualBox sharing system.
As a result, only projects located inside your workspace will be visible in the runtime container.
Developer Studio can import or create projects that are located in another folder than the workspace, like a link.
You can use Developer Studio preferences to bind any folder out of the workspace to a location inside the Docker runtime container.
List of available Developer Studio release notes:
Developer Studio 5.2
Developer Studio 5.1
Developer Studio 5.0
Developer Studio 4.1.1
Developer Studio 4.1
Developer Studio 4.0
Developer Studio 3.6
Developer Studio 3.5
Developer Studio 3.4
Developer Studio 3.2
Developer Studio 2.3.2