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Enhance network boot setup script and documentation: automate fetching of Raspberry Pi 4 boot files from GitHub, update TFTP root handling, and improve user instructions for setup. Remove manual steps for file retrieval and clarify echo messages in the setup script.

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nearxos
2026-02-20 12:28:54 +02:00
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commit b99cc2520a
3 changed files with 77 additions and 15 deletions
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19
chromium-setup/emmc-provisioning/docs/NETWORK-BOOT-LXC.md
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@@ -42,9 +42,9 @@ The script will:
- Install **dnsmasq** (DHCP + TFTP).
- Configure dnsmasq to listen only on **eth1**, with a DHCP range and TFTP root.
- Create `/srv/tftpboot` and optionally fetch Raspberry Pi boot files (or tell you how).
- Create `/srv/tftpboot` and **fetch Raspberry Pi 4 boot files from GitHub** (raspberrypi/firmware, `boot/` folder) if not already present.
- Enable **IPv4 forwarding** and **NAT** (nftables) so clients on eth1 use eth0 for internet.
- Enable and start the **dnsmasq** and **nftables** (or apply rules) services.
- Enable and start the **dnsmasq** service.
## Proxmox: adding eth1 to the LXC
@@ -74,16 +74,17 @@ Your current LXC already has eth0 (10.130.60.141) and eth1 (10.20.50.1); the set
## TFTP boot files (Raspberry Pi 4 / CM4)
The TFTP root (e.g. `/srv/tftpboot`) must contain the Raspberry Pi firmware boot files, for example:
The setup script **automatically downloads** the official Raspberry Pi firmware `boot/` folder from GitHub (https://github.com/raspberrypi/firmware) into `/srv/tftpboot` when `start4cd.elf` is missing. No manual copy is needed.
- `start4.elf`, `fixup4.dat` (or `start4cd.elf`, `fixup4cd.dat`)
- `config.txt`, `cmdline.txt`
- `kernel8.img` (64-bit) or `kernel7l.img` (32-bit)
To refresh or populate TFTP without re-running the full setup:
You can:
```bash
./chromium-setup/emmc-provisioning/scripts/populate-tftpboot-from-git.sh root@<LXC-IP>
```
- Run the script’s step that downloads the boot files from the official Raspberry Pi firmware repo, or
- Copy them from a Raspberry Pi OS `/boot/firmware` (or `/boot`) into `/srv/tftpboot` on the LXC.
(Remove `/srv/tftpboot/start4cd.elf` on the LXC first if you want a full re-fetch.)
The TFTP root contains e.g. `start4cd.elf`, `fixup4cd.dat`, `config.txt`, `cmdline.txt`, `kernel8.img`, and other boot files. For a custom kernel or initramfs (e.g. for provisioning), add or replace files in `/srv/tftpboot` and adjust `config.txt` / `cmdline.txt` as needed.
## Summary