112 lines
4.3 KiB
Markdown
Executable File
112 lines
4.3 KiB
Markdown
Executable File
# Dependencies
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sudo apt-get update && sudo apt-get install git quilt kpartx realpath qemu-user-static debootstrap zerofree pxz zip dosfstools bsdtar libcap2-bin -y && cd ../ && sudo git clone https://github.com/dride/drideOS-image-generator && cd drideOS-image-generator && sudo ./build.sh
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# drideOS (Raspbian) Stage Overview
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Upon execution, `build.sh` will source the file `config` in the current
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working directory. This bash shell fragment is intended to set needed
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environment variables.
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The following environment variables are supported:
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* `IMG_NAME` **required** (Default: unset)
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The name of the image to build with the current stage directories. Setting
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`IMG_NAME=Raspbian` is logical for an unmodified RPi-Distro/pi-gen build,
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but you should use something else for a customized version. Export files
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in stages may add suffixes to `IMG_NAME`.
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* `APT_PROXY` (Default: unset)
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If you require the use of an apt proxy, set it here. This proxy setting
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will not be included in the image, making it safe to use an `apt-cacher` or
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similar package for development.
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* `BASE_DIR` (Default: location of `build.sh`)
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**CAUTION**: Currently, changing this value will probably break build.sh
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Top-level directory for `pi-gen`. Contains stage directories, build
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scripts, and by default both work and deployment directories.
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* `WORK_DIR` (Default: `"$BASE_DIR/work"`)
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Directory in which `pi-gen` builds the target system. This value can be
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changed if you have a suitably large, fast storage location for stages to
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be built and cached. Note, `WORK_DIR` stores a complete copy of the target
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system for each build stage, amounting to tens of gigabytes in the case of
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Raspbian.
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* `DEPLOY_DIR` (Default: `"$BASE_DIR/deploy"`)
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Output directory for target system images and NOOBS bundles.
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A simple example for building Raspbian:
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```bash
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IMG_NAME='Raspbian'
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```
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## Docker Build
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```bash
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vi config # Edit your config file. See above.
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./build-docker.sh
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```
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If everything goes well, your finished image will be in the `deploy/` folder.
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You can then remove the build container with `docker rm pigen_work`
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If something breaks along the line, you can edit the corresponding scripts, and
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continue:
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```bash
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CONTINUE=1 ./build-docker.sh
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```
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There is a possibility that even when running from a docker container, the
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installation of `qemu-user-static` will silently fail when building the image
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because `binfmt-support` _must be enabled on the underlying kernel_. An easy
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fix is to ensure `binfmt-support` is installed on the host machine before
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starting the `./build-docker.sh` script (or using your own docker build
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solution).
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## Stage Anatomy
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### Raspbian Stage Overview
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The build of Raspbian is divided up into several stages for logical clarity
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and modularity. This causes some initial complexity, but it simplifies
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maintenance and allows for more easy customization.
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- Stage 0, bootstrap. The primary purpose of this stage is to create a
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usable filesystem. This is accomplished largely through the use of
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`debootstrap`, which creates a minimal filesystem suitable for use as a
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base.tgz on Debian systems. This stage also configures apt settings and
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installs `raspberrypi-bootloader` which is missed by debootstrap. The
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minimal core is installed but not configured, and the system will not quite
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boot yet.
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- Stage 1, truly minimal system. This stage makes the system bootable by
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installing system files like `/etc/fstab`, configures the bootloader, makes
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the network operable, and installs packages like raspi-config. At this
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stage the system should boot to a local console from which you have the
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means to perform basic tasks needed to configure and install the system.
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This is as minimal as a system can possibly get, and its arguably not
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really usable yet in a traditional sense yet. Still, if you want minimal,
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this is minimal and the rest you could reasonably do yourself as sysadmin.
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- State 2, lite system. This stage produces the Raspbian-Lite image. It
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installs some optimized memory functions, sets timezone and charmap
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defaults, installs fake-hwclock and ntp, wifi and bluetooth support,
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dphys-swapfile, and other basics for managing the hardware. It also
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creates necessary groups and gives the pi user access to sudo and the
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standard console hardware permission groups.
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