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zosbuilder/components/rfs/docs/zdb_flists.md
Jan De Landtsheer bf62e887e8 feat: Create minimal Zero-OS initramfs with console support 
- Fixed build system to clone source repositories instead of downloading binaries
- Enhanced scripts/fetch-github.sh with proper git repo cloning and branch handling
- Updated scripts/compile-components.sh for RFS compilation with build-binary feature
- Added minimal firmware installation for essential network drivers (73 modules)
- Created comprehensive zinit configuration set (15 config files including getty)
- Added util-linux package for getty/agetty console support
- Optimized package selection for minimal 27MB initramfs footprint
- Successfully builds bootable vmlinuz.efi with embedded initramfs
- Confirmed working: VM boot, console login, network drivers, zinit init system

Components:
- initramfs.cpio.xz: 27MB compressed minimal Zero-OS image
- vmlinuz.efi: 35MB bootable kernel with embedded initramfs
- Complete Zero-OS toolchain: zinit, rfs, mycelium compiled from source
2025-08-16 23:25:59 +02:00

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Generate an flist using ZDB

Deploy a vm

  1. Deploy a vm with a public IP
  2. add docker (don't forget to add a disk for it with mountpoint = "/var/lib/docker")
  3. add caddy

Install zdb and run an instance of it

  1. Execute git clone -b development-v2 https://github.com/threefoldtech/0-db /zdb then cd /zdb

  2. Build

    cd libzdb
make
cd ..

cd zdbd
make STATIC=1
cd ..

make

  3. Install make install

  4. run zdb --listen 0.0.0.0

  5. The result info you should know

    zdbEndpoint = "<vm public IP>:<port>"
zdbNameSpace = "default"
zdbPassword = "default"

Install rfs

  1. Execute git clone -b development-v2 https://github.com/threefoldtech/rfs then cd /rfs

  2. Execute

    rustup target add x86_64-unknown-linux-musl`
cargo build --features build-binary --release --target=x86_64-unknown-linux-musl
mv ./target/x86_64-unknown-linux-musl/release/rfs /usr/bin/

Convert docker image to an fl

  1. Try an image for example threefolddev/ubuntu:22.04 image
  2. Executing rfs docker -i threefolddev/ubuntu:22.04 -s "zdb://<vm public IP>:<port>/default" -d
  3. You will end up having threefolddev-ubuntu-22.04.fl (flist)

Serve the flist using caddy

  1. In the directory includes the output flist, you can run caddy file-server --listen 0.0.0.0:2015 --browse
  2. The flist will be available as http://<vm public IP>:2015/threefolddev-ubuntu-22.04.fl
  3. Use the flist to deploy any virtual machine.