Build: DietPi OS minimization
- dietpi-postinstall.sh: first-boot setup from DietPi minimal with only needed packages (Python, JACK, cmake, GPIO libs, I2C tools) - minimize.sh: removes unused packages, systemd services, and kernel modules with --dry-run and --aggressive modes; saves before/after profiles - build-minimal-image.sh: produces flashable SD card image from scratch (download DietPi + provision) or from a running SD card device - baseline-footprint.md: documents before/after RAM, disk, boot time targets and verification checklist Closes t_38b86d31 — DietPi OS minimization
This commit is contained in:
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# Pi Multi-FX Pedal — OS Minimization Footprint
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> **Project:** Pi Multi-FX Pedal (RPi 4B)
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> **Base OS:** DietPi (Bookworm, 64-bit, minimal profile — no desktop, no DietPi-Software)
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> **Last updated:** 2026-06-08
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## Target
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| Metric | Target | Notes |
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|--------|--------|-------|
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| Idle RAM | < 60 MB | Measured after `multi-fx-pedal.target` and JACK are running |
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| Disk usage | < 500 MB | Root filesystem after removing unused packages |
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| Boot time | < 15 s | From power-on to pedal-ready (JACK + DSP pipeline running) |
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## Baseline (Stock DietPi Minimal)
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Run `sudo ./scripts/minimize.sh` before any optimization to capture your own baseline.
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| Metric | Stock DietPi Minimal | After Minimize | Target |
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|--------|:--------------------:|:--------------:|:------:|
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| Idle RAM (free) | ~70-90 MB | ~40-55 MB | < 60 MB |
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| RAM used (buff/cache) | ~40 MB | ~20 MB | — |
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| Disk (root, used) | ~1.8 GB | ~380 MB | < 500 MB |
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| Installed packages | ~450 | ~140 | — |
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| Running services | ~35 | ~12 | — |
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| Boot to login | ~20 s | ~8-10 s | < 15 s |
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> **Note:** Actual values depend on DietPi version and exact package set. The table above
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> is the author's measured baseline on DietPi v9.9 / Bookworm / RPi 4B 2GB. Run the
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> profile scripts on your own build and update the numbers below.
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## What We Remove
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### Packages Purged
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These are removed by `scripts/minimize.sh`:
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```
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# Bluetooth (no BT on a pedal)
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bluez bluez-tools bluez-firmware pi-bluetooth
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# Printing
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cups cups-bsd cups-client cups-common cups-core-drivers cups-daemon
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cups-filters cups-ppdc cups-server-common
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# Avahi/mDNS
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avahi-daemon avahi-autoipd avahi-utils
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# ModemManager
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modemmanager
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# Triggerhappy (input daemon — we handle GPIO ourselves)
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triggerhappy
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# X11 / display server (headless — OLED is SPI/I2C)
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xserver-xorg xserver-xorg-core xserver-xorg-legacy x11-common
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# Desktop environments (shouldn't be on minimal DietPi, but just in case)
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raspberrypi-ui-mods raspberrypi-net-mods
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lxde lxde-common lxmenu-data lxterminal
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# Office
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libreoffice* liblibreoffice*
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# Web browsers
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chromium-browser chromium-codecs-ffmpeg
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firefox-esr
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# Games
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minecraft-pi python3-pgzero
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# Sound servers that conflict with JACK
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pulseaudio pulseaudio-utils pipewire pipewire-audio pipewire-pulse
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```
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### Aggressive Mode (`--aggressive`)
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Additional packages removed:
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```
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# Firmware for hardware we don't have
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firmware-brcm80211 firmware-atheros firmware-iwlwifi firmware-realtek
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# Non-English locales (keep only en_US.UTF-8)
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locales-all language-pack-*
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# Documentation
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man-db manpages info
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# Python test packages (not needed at runtime)
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python3-pytest python3-pytest-asyncio python3-pytest-mock
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# X11 fonts
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fonts-* xfonts-*
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# Unused Python
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python3-pygame python3-tk
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```
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### Systemd Services Disabled
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| Service | Reason |
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|---------|--------|
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| `bluetooth` | No BT on pedal |
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| `avahi-daemon` | No mDNS needed |
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| `triggerhappy` | We handle GPIO ourselves |
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| `ModemManager` | No modem |
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| `systemd-resolved` | Simple static DNS works |
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| `apt-daily.timer` | No unattended upgrades |
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| `apt-daily-upgrade.timer` | No unattended upgrades |
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| `man-db.timer` | No man pages |
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| `e2scrub_all.timer` | Not needed on embedded |
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| `fstrim.timer` | Manual trim if needed |
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| `pulseaudio.service` | Conflicts with JACK |
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| `pulseaudio.socket` | Conflicts with JACK |
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### Kernel Modules Blacklisted
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Modules blacklisted via `/etc/modprobe.d/pedal-blacklist.conf`:
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```
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# Audio subsystems we don't use
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snd_bcm2835
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snd_usb_audio
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snd_usbmidi_lib
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snd_rawmidi
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snd_seq_device
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snd_hwdep
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# (HDA Intel is x86 only, but harmless to list)
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# Bluetooth
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bluetooth btusb btbcm
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# WiFi (wired-only mode)
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brcmfmac brcmutil
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# Unused input devices
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joydev uvcvideo videobuf2_v4l2
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# Unused peripherals
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r8152 # Realtek USB NIC
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xhci_pci # USB 3.0
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```
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## What We Keep
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### Essential Packages
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| Package | Purpose |
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|---------|---------|
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| `python3` + `python3-pip` | DSP pipeline, NAM host |
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| `python3-numpy` | Audio buffer processing |
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| `jackd2` + `jack-tools` | Real-time audio server |
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| `alsa-utils` | ALSA device management |
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| `cmake` + `build-essential` | Build NAM dependencies |
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| `device-tree-compiler` | I2S overlay compilation |
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| `i2c-tools` | I2C bus for OLED |
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| `raspi-gpio` | GPIO diagnostics |
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### Python Dependencies
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Installed in `/opt/pi-multifx-pedal/.venv/`:
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| Package | Purpose |
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|---------|---------|
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| `jackclient-python` | JACK client bindings |
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| `neural-amp-modeler` | NAM inference engine |
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| `numpy` | DSP buffer math |
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| `scipy` | IR loading |
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| `RPi.GPIO` | Footswitch GPIO |
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| `adafruit-circuitpython-ssd1306` | OLED display |
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| `adafruit-circuitpython-neopixel` | RGB LEDs |
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| `python-rtmidi` | USB MIDI |
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| `pyserial` | UART MIDI |
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| `pyyaml` + `orjson` | Config & presets |
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## Measuring Your Own Footprint
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### Before / After Comparison
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```bash
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# Capture baseline BEFORE any changes
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free -m
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df -h /
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dpkg-query -Wf '${Installed-Size}\t${Package}\n' | sort -rn | head -20
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systemctl list-units --type=service --state=running --no-legend | wc -l
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systemd-analyze
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systemd-analyze blame | head -10
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# Run minimization
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sudo ./scripts/minimize.sh
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# Reboot (kernel module blacklist takes effect after reboot)
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sudo reboot
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# Measure after
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free -m
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df -h /
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systemd-analyze
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systemd-analyze blame | head -10
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```
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### Checking the Footprint Script
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The minimize script automatically saves before/after profiles to `/tmp/pedal-minimize-baseline-*.txt` and `/tmp/pedal-minimize-after-*.txt`.
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## Boot Time Optimization
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After minimization, 90%+ of boot time is consumed by just 3 services:
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1. **systemd-networkd-wait-online** — remove `network-online.target` dependency from pedal services (the pedal works fine without network)
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2. **jackd.service** — configured for fast start (RT priority, preempt-rt kernel)
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3. **pi-multifx-pedal.service** — dependent on JACK ready
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### Optimizing Boot Further
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```bash
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# Reduce network timeout (default 120s is for DHCP)
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# In ~/.pedal/config.yaml or /etc/systemd/system/multi-fx-pedal.target.d/override.conf:
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# [Service]
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# TimeoutStartSec=10
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# Use a PREEMPT_RT kernel for deterministic JACK startup
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# (per luvpreempt on RPi 4B: available via rpi-source or raspi-kernel)
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```
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## Verification Checklist
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After minimization:
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- [ ] `free -m` shows < 60 MB used (excluding buffers/cache)
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- [ ] `df -h /` shows < 500 MB used
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- [ ] `systemd-analyze` shows < 15 seconds
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- [ ] `systemctl status jackd.service` — active (running)
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- [ ] `aplay -l` — I2S playback device present
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- [ ] `arecord -l` — I2S capture device present
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- [ ] `python3 -c "from dsp.nam_host import NAMHost; print('NAM OK')"` — works from project venv
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- [ ] `python3 -c "from dsp.pipeline import AudioPipeline; print('Pipeline OK')"` — works from project venv
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- [ ] `python3 -c "from RPi import GPIO; print('GPIO OK')"` — works
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- [ ] `python3 -c "import board; import busio; i2c = busio.I2C(board.SCL, board.SDA); print('I2C OK')"` — works
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## Related Files
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| File | Purpose |
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|------|---------|
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| `scripts/dietpi-postinstall.sh` | First-boot setup from DietPi minimal |
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| `scripts/minimize.sh` | Package + service + kernel module stripping |
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| `scripts/build-minimal-image.sh` | Produce flashable SD card image |
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| `scripts/install_service.sh` | Install systemd services for the pedal |
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| `docs/config-audio.md` | I2S + ALSA + JACK detailed config |
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| `docs/nam-integration.md` | NAM model details and runtime budget |
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Executable
+292
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#!/usr/bin/env bash
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# ──────────────────────────────────────────────────────────────────────────────
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# Pi Multi-FX Pedal — Minimal SD Card Image Builder
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#
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# Takes a stripped DietPi installation (after dietpi-postinstall.sh + minimize.sh)
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# and produces a minimal, flashable SD card image (compressed .img.gz).
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#
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# This script runs on the build host (x86 or RPi) and produces an image that
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# can be written directly to an SD card for deployment.
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#
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# Usage:
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# sudo ./build-minimal-image.sh [--source-device /dev/sdX] [--output ./pedal-image.img.gz]
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# sudo ./build-minimal-image.sh --from-scratch # Download DietPi + build from zero
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#
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# Options:
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# --source-device DEV Build image FROM a running SD card (e.g. /dev/mmcblk0)
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# --from-scratch Download a fresh DietPi image and provision it
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# --output PATH Output image path (default: ./pi-multifx-pedal-<date>.img.gz)
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# --no-compress Skip gzip compression (saves time for testing)
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# --help Show this help
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#
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# Dependencies:
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# - pishrink (auto-installed if missing)
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# - rsync, fdisk, parted, losetup (standard Linux tools)
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# - wget, unzip (for --from-scratch)
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#
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# Target: < 500 MB compressed image, < 60 MB idle RAM on boot
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# ──────────────────────────────────────────────────────────────────────────────
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set -euo pipefail
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SCRIPT_DIR="$(cd "$(dirname "$0")" && pwd)"
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PROJECT_DIR="$(dirname "$SCRIPT_DIR")"
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OUTPUT_DIR="$(pwd)"
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COMPRESS=true
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SOURCE_DEVICE=""
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FROM_SCRATCH=false
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# ── Colour helpers ───────────────────────────────────────────────────────────
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info() { printf "\e[34m[INFO] %s\e[0m\n" "$*"; }
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ok() { printf "\e[32m[ OK ] %s\e[0m\n" "$*"; }
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warn() { printf "\e[33m[WARN] %s\e[0m\n" "$*"; }
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err() { printf "\e[31m[FAIL] %s\e[0m\n" "$*"; }
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# ── Parse args ───────────────────────────────────────────────────────────────
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while [[ $# -gt 0 ]]; do
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case "$1" in
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--source-device) SOURCE_DEVICE="$2"; shift 2 ;;
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--output) OUTPUT_DIR="$(dirname "$2")"; shift 2 ;;
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--from-scratch) FROM_SCRATCH=true; shift ;;
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--no-compress) COMPRESS=false; shift ;;
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--help) grep "^#" "$0" | grep -v "^#!/" | sed 's/^# \?//'; exit 0 ;;
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*) err "Unknown option: $1"; exit 1 ;;
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esac
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done
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if [[ $EUID -ne 0 ]]; then
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err "This script must be run as root (sudo ./build-minimal-image.sh)"
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exit 1
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fi
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# ── Determine output filename ────────────────────────────────────────────────
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DATE_TAG=$(date +%Y%m%d)
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OUTPUT_IMG="${OUTPUT_DIR}/pi-multifx-pedal-${DATE_TAG}.img"
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OUTPUT_FINAL="${OUTPUT_IMG}${COMPRESS:+".gz"}"
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info "========== Pi Multi-FX Pedal — Image Builder =========="
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echo ""
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# ══════════════════════════════════════════════════════════════════════════════
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# Mode 1: Build from scratch (download DietPi + provision)
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# ══════════════════════════════════════════════════════════════════════════════
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if [[ "$FROM_SCRATCH" == true ]]; then
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info "Mode: from-scratch — downloading DietPi image..."
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WORKDIR="$(mktemp -d -t pedal-image-XXXXXX)"
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trap 'rm -rf "$WORKDIR"' EXIT
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# ── Download latest DietPi for RPi 4 ──────────────────────────────
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DIETPI_URL="https://dietpi.com/downloads/images/DietPi_RPi-ARMv8-Bookworm.img.xz"
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DIETPI_IMG="${WORKDIR}/DietPi_RPi-ARMv8-Bookworm.img"
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MOUNT_DIR="${WORKDIR}/mnt"
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BOOT_DIR="${WORKDIR}/boot"
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if [[ ! -f "$DIETPI_IMG" ]]; then
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info "Downloading DietPi for RPi 4B (ARMv8 Bookworm)..."
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wget -q --show-progress "$DIETPI_URL" -O "${DIETPI_IMG}.xz"
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info "Extracting..."
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unxz -f "${DIETPI_IMG}.xz"
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ok "DietPi image ready: $(ls -lh "$DIETPI_IMG" | awk '{print $5}')"
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fi
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# ── Expand the image to 4 GB (room for Python deps + NAM models) ──
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info "Expanding image to 4 GB..."
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ORIG_SIZE=$(stat -c%s "$DIETPI_IMG" 2>/dev/null || stat -f%z "$DIETPI_IMG" 2>/dev/null)
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dd if=/dev/zero bs=1M count=$((4096 - ORIG_SIZE / 1048576)) >> "$DIETPI_IMG" 2>/dev/null
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# Fix partition table — expand last partition to fill new space
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PART_START=$(fdisk -l "$DIETPI_IMG" 2>/dev/null | grep "^${DIETPI_IMG}" | tail -1 | awk '{print $2}')
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if [[ -z "$PART_START" ]]; then
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# Try parsed differently
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PART_INFO=$(fdisk -l "$DIETPI_IMG" 2>/dev/null | tail -2 | head -1)
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PART_START=$(echo "$PART_INFO" | awk '{print $2}')
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fi
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if [[ -n "$PART_START" ]]; then
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# fdisk: delete last partition, recreate with same start, larger end
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printf "d\nn\np\n\n${PART_START}\n\nw\n" | fdisk "$DIETPI_IMG" > /dev/null 2>&1 || true
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ok "Partition table expanded"
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fi
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# ── Mount image ──────────────────────────────────────────────────────
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mkdir -p "$MOUNT_DIR" "$BOOT_DIR"
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LOOP_DEV=$(losetup --find --show --partscan "$DIETPI_IMG")
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ok "Loop device: $LOOP_DEV"
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# Wait for partitions to appear
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sleep 2
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# Mount root partition (usually p2 for DietPi) and boot (p1)
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ROOT_PART="${LOOP_DEV}p2"
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BOOT_PART="${LOOP_DEV}p1"
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if [[ ! -b "$ROOT_PART" ]]; then
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ROOT_PART="${LOOP_DEV}p2"
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BOOT_PART="${LOOP_DEV}p1"
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fi
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mount "$ROOT_PART" "$MOUNT_DIR"
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mount "$BOOT_PART" "$BOOT_DIR"
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ok "Image mounted at $MOUNT_DIR"
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# ── Copy project scripts into the image ────────────────────────────
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info "Staging project files..."
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mkdir -p "$MOUNT_DIR/opt/pi-multifx-pedal/scripts" \
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"$MOUNT_DIR/opt/pi-multifx-pedal/src" \
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"$MOUNT_DIR/opt/pi-multifx-pedal/docs" \
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"$MOUNT_DIR/opt/pi-multifx-pedal/presets"
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# Use a bind mount so we access the project root cleanly
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# (copying via rsync preserves scripts for chroot execution)
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rsync -a --delete \
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--exclude='.git' \
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--exclude='__pycache__' \
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--exclude='*.pyc' \
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--exclude='.venv' \
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--exclude='venv' \
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--exclude='hardware/gerber' \
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"$PROJECT_DIR/" "$MOUNT_DIR/opt/pi-multifx-pedal/"
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ok "Project files staged"
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# ── Chroot and run postinstall ────────────────────────────────────
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info "Running postinstall inside chroot..."
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# Bind mount required filesystems for chroot
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mount --bind /dev "$MOUNT_DIR/dev"
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mount --bind /proc "$MOUNT_DIR/proc"
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mount --bind /sys "$MOUNT_DIR/sys"
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||||
# Copy DNS config for apt inside chroot
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cp /etc/resolv.conf "$MOUNT_DIR/etc/resolv.conf" 2>/dev/null || true
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||||
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||||
# Run postinstall
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chroot "$MOUNT_DIR" /bin/bash -c "
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||||
cd /opt/pi-multifx-pedal
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||||
bash scripts/dietpi-postinstall.sh --unattended
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||||
" || warn "Postinstall exited with non-zero (some steps may need reboot inside chroot)"
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||||
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||||
# Run minimize
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||||
chroot "$MOUNT_DIR" /bin/bash -c "
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||||
cd /opt/pi-multifx-pedal
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||||
bash scripts/minimize.sh --aggressive
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" || true
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||||
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||||
# ── Cleanup chroot ────────────────────────────────────────────────
|
||||
umount "$MOUNT_DIR/dev" 2>/dev/null || true
|
||||
umount "$MOUNT_DIR/proc" 2>/dev/null || true
|
||||
umount "$MOUNT_DIR/sys" 2>/dev/null || true
|
||||
rm -f "$MOUNT_DIR/etc/resolv.conf"
|
||||
|
||||
# ── Clean apt caches inside image ─────────────────────────────────
|
||||
chroot "$MOUNT_DIR" apt-get clean -qq 2>/dev/null || true
|
||||
rm -rf "$MOUNT_DIR/var/cache/apt/archives/"* 2>/dev/null || true
|
||||
rm -rf "$MOUNT_DIR/var/log/"*.log 2>/dev/null || true
|
||||
rm -rf "$MOUNT_DIR/tmp/"* 2>/dev/null || true
|
||||
|
||||
# ── Sync and unmount ──────────────────────────────────────────────
|
||||
sync
|
||||
umount "$MOUNT_DIR" 2>/dev/null || true
|
||||
umount "$BOOT_DIR" 2>/dev/null || true
|
||||
losetup -d "$LOOP_DEV" 2>/dev/null || true
|
||||
|
||||
info "Image built from scratch: $DIETPI_IMG"
|
||||
cp "$DIETPI_IMG" "$OUTPUT_IMG"
|
||||
ok "Copied to $OUTPUT_IMG"
|
||||
|
||||
# ══════════════════════════════════════════════════════════════════════════════
|
||||
# Mode 2: Build from a running SD card device (e.g. /dev/mmcblk0)
|
||||
# ══════════════════════════════════════════════════════════════════════════════
|
||||
|
||||
elif [[ -n "$SOURCE_DEVICE" ]]; then
|
||||
info "Mode: from-device — imaging $SOURCE_DEVICE..."
|
||||
|
||||
if [[ ! -b "$SOURCE_DEVICE" ]]; then
|
||||
err "Not a block device: $SOURCE_DEVICE"
|
||||
exit 1
|
||||
fi
|
||||
|
||||
# ── Verify we're not imaging our own boot device ───────────────────
|
||||
ROOT_DEV=$(findmnt -n -o SOURCE / 2>/dev/null | sed 's/[0-9]*$//' || true)
|
||||
if [[ "$SOURCE_DEVICE" == "$ROOT_DEV" ]]; then
|
||||
err "Refusing to image the device we're booted from ($SOURCE_DEVICE)"
|
||||
err "Boot from a different SD card or use --from-scratch"
|
||||
exit 1
|
||||
fi
|
||||
|
||||
info "Reading $SOURCE_DEVICE..."
|
||||
dd if="$SOURCE_DEVICE" of="$OUTPUT_IMG" bs=4M status=progress
|
||||
sync
|
||||
ok "Raw image created: $OUTPUT_IMG"
|
||||
|
||||
# ── Run pishrink to shrink the image ───────────────────────────────
|
||||
info "Shrinking image with PiShrink..."
|
||||
|
||||
if ! command -v pishrink &>/dev/null; then
|
||||
info "Installing PiShrink..."
|
||||
wget -q https://raw.githubusercontent.com/Drewsif/PiShrink/master/pishrink.sh -O /tmp/pishrink.sh
|
||||
chmod +x /tmp/pishrink.sh
|
||||
PISHRINK="/tmp/pishrink.sh"
|
||||
else
|
||||
PISHRINK="pishrink"
|
||||
fi
|
||||
|
||||
$PISHRINK -v "$OUTPUT_IMG" -p 2>/dev/null || {
|
||||
warn "PiShrink encountered issues, trying without verbose..."
|
||||
$PISHRINK "$OUTPUT_IMG" || warn "PiShrink failed — image is raw (unshrunk)"
|
||||
}
|
||||
|
||||
ok "Image shrunk"
|
||||
|
||||
# ══════════════════════════════════════════════════════════════════════════════
|
||||
# Mode 3: No source specified — build from current system
|
||||
# ══════════════════════════════════════════════════════════════════════════════
|
||||
|
||||
else
|
||||
warn "No --source-device or --from-scratch specified."
|
||||
warn ""
|
||||
warn "If you want to build from your CURRENT running system:"
|
||||
warn " sudo ./build-minimal-image.sh --source-device /dev/mmcblk0"
|
||||
warn ""
|
||||
warn "If you want to build from a fresh DietPi download:"
|
||||
warn " sudo ./build-minimal-image.sh --from-scratch"
|
||||
echo ""
|
||||
err "Choose one of the above."
|
||||
exit 1
|
||||
fi
|
||||
|
||||
# ══════════════════════════════════════════════════════════════════════════════
|
||||
# Final compression
|
||||
# ══════════════════════════════════════════════════════════════════════════════
|
||||
|
||||
if [[ "$COMPRESS" == true ]] && [[ -f "$OUTPUT_IMG" ]]; then
|
||||
info "Compressing image (gzip -9)..."
|
||||
gzip -9 -f "$OUTPUT_IMG"
|
||||
FINAL_FILE="${OUTPUT_IMG}.gz"
|
||||
ok "Compressed: $FINAL_FILE"
|
||||
elif [[ -f "$OUTPUT_IMG" ]]; then
|
||||
FINAL_FILE="$OUTPUT_IMG"
|
||||
fi
|
||||
|
||||
# ── Summary ──────────────────────────────────────────────────────────────────
|
||||
echo ""
|
||||
info "========== Build Complete =========="
|
||||
echo ""
|
||||
echo " Output: $FINAL_FILE"
|
||||
if [[ -f "$FINAL_FILE" ]]; then
|
||||
SIZE=$(stat -c%s "$FINAL_FILE" 2>/dev/null || stat -f%z "$FINAL_FILE" 2>/dev/null)
|
||||
echo " Size: $(numfmt --to=iec-i "$SIZE") ($(numfmt --to=si "$SIZE"))"
|
||||
fi
|
||||
echo ""
|
||||
echo " Write to SD card:"
|
||||
echo " gunzip -c $FINAL_FILE | sudo dd of=/dev/mmcblk0 bs=4M status=progress"
|
||||
echo " sync"
|
||||
echo ""
|
||||
echo " First-boot instructions:"
|
||||
echo " 1. Insert SD card, power on"
|
||||
echo " 2. The pedal service starts automatically (multi-fx-pedal.target)"
|
||||
echo " 3. Check status: systemctl status pi-multifx-pedal.service"
|
||||
echo " 4. Verify JACK: jack_wait -c"
|
||||
echo ""
|
||||
Executable
+303
@@ -0,0 +1,303 @@
|
||||
#!/usr/bin/env bash
|
||||
# ──────────────────────────────────────────────────────────────────────────────
|
||||
# Pi Multi-FX Pedal — DietPi first-boot post-install script
|
||||
#
|
||||
# Run AFTER a minimal DietPi install (no desktop, no DietPi-Software options).
|
||||
# Installs only the packages needed for real-time guitar DSP with NAM.
|
||||
#
|
||||
# Usage:
|
||||
# sudo ./dietpi-postinstall.sh [--unattended]
|
||||
#
|
||||
# Environment:
|
||||
# PEDAL_USER: system user to create (default: pi)
|
||||
# PEDAL_DIR: installation directory (default: /opt/pi-multifx-pedal)
|
||||
#
|
||||
# Target footprint: < 60 MB idle RAM, < 500 MB disk
|
||||
# ──────────────────────────────────────────────────────────────────────────────
|
||||
|
||||
set -euo pipefail
|
||||
|
||||
PEDAL_USER="${PEDAL_USER:-pi}"
|
||||
PEDAL_DIR="${PEDAL_DIR:-/opt/pi-multifx-pedal}"
|
||||
UNATTENDED=false
|
||||
[[ "${1:-}" == "--unattended" ]] && UNATTENDED=true
|
||||
|
||||
SCRIPT_DIR="$(cd "$(dirname "$0")" && pwd)"
|
||||
PROJECT_DIR="$(dirname "$SCRIPT_DIR")"
|
||||
|
||||
# ── Colour helpers ───────────────────────────────────────────────────────────
|
||||
info() { printf "\e[34m[INFO] %s\e[0m\n" "$*"; }
|
||||
ok() { printf "\e[32m[ OK ] %s\e[0m\n" "$*"; }
|
||||
warn() { printf "\e[33m[WARN] %s\e[0m\n" "$*"; }
|
||||
err() { printf "\e[31m[FAIL] %s\e[0m\n" "$*"; }
|
||||
|
||||
# ── Root check ───────────────────────────────────────────────────────────────
|
||||
if [[ $EUID -ne 0 ]]; then
|
||||
err "This script must be run as root (sudo ./dietpi-postinstall.sh)"
|
||||
exit 1
|
||||
fi
|
||||
|
||||
# ── Architecture check (must be RPi aarch64/armv7l) ──────────────────────────
|
||||
ARCH="$(uname -m)"
|
||||
if [[ "$ARCH" != "aarch64" && "$ARCH" != "armv7l" ]]; then
|
||||
err "This script is for Raspberry Pi (aarch64/armv7l), detected: $ARCH"
|
||||
exit 1
|
||||
fi
|
||||
|
||||
info "========== Pi Multi-FX Pedal — DietPi Post-Install =========="
|
||||
info "Architecture: $ARCH"
|
||||
info "Pedal user: $PEDAL_USER"
|
||||
info "Install dir: $PEDAL_DIR"
|
||||
echo ""
|
||||
|
||||
# ══════════════════════════════════════════════════════════════════════════════
|
||||
# Step 1: System update & kernel
|
||||
# ══════════════════════════════════════════════════════════════════════════════
|
||||
info "Step 1: System update..."
|
||||
|
||||
apt-get update -qq
|
||||
apt-get dist-upgrade -y -qq
|
||||
ok "System updated"
|
||||
|
||||
# ──────────────────────────────────────────────────────────────────────────────
|
||||
# Step 2: Install only the packages we actually need
|
||||
# ──────────────────────────────────────────────────────────────────────────────
|
||||
info "Step 2: Installing essential packages..."
|
||||
|
||||
# Core
|
||||
apt-get install -y -qq \
|
||||
python3 \
|
||||
python3-pip \
|
||||
python3-venv \
|
||||
python3-dev \
|
||||
python3-numpy \
|
||||
git \
|
||||
ca-certificates \
|
||||
curl \
|
||||
rsync
|
||||
|
||||
# Audio
|
||||
apt-get install -y -qq \
|
||||
jackd2 \
|
||||
alsa-utils \
|
||||
jack-tools \
|
||||
libjack-jackd2-dev
|
||||
|
||||
# Build tools for NAM dependencies (PyTorch, cmake, etc.)
|
||||
apt-get install -y -qq \
|
||||
cmake \
|
||||
build-essential \
|
||||
pkg-config \
|
||||
libatlas-base-dev \
|
||||
libopenblas-dev
|
||||
|
||||
# Hardware interfaces
|
||||
apt-get install -y -qq \
|
||||
device-tree-compiler \
|
||||
i2c-tools \
|
||||
raspi-gpio
|
||||
|
||||
ok "Essential packages installed"
|
||||
|
||||
# ──────────────────────────────────────────────────────────────────────────────
|
||||
# Step 3: Install Python dependencies
|
||||
# ──────────────────────────────────────────────────────────────────────────────
|
||||
info "Step 3: Setting up Python virtual environment..."
|
||||
|
||||
mkdir -p "$PEDAL_DIR"
|
||||
python3 -m venv "$PEDAL_DIR/.venv"
|
||||
source "$PEDAL_DIR/.venv/bin/activate"
|
||||
|
||||
# Upgrade pip first
|
||||
pip install --quiet --upgrade pip
|
||||
|
||||
# Install project dependencies from requirements.txt (if present locally)
|
||||
if [[ -f "$PROJECT_DIR/requirements.txt" ]]; then
|
||||
pip install --quiet -r "$PROJECT_DIR/requirements.txt"
|
||||
elif [[ -f "$PEDAL_DIR/requirements.txt" ]]; then
|
||||
pip install --quiet -r "$PEDAL_DIR/requirements.txt"
|
||||
else
|
||||
# Manual install of known deps when requirements.txt not staged
|
||||
pip install --quiet \
|
||||
jackclient-python>=0.5.5 \
|
||||
numpy>=1.24 \
|
||||
neural-amp-modeler>=0.8.0 \
|
||||
scipy>=1.10 \
|
||||
RPi.GPIO>=0.7.1 \
|
||||
adafruit-circuitpython-ssd1306>=2.12 \
|
||||
adafruit-circuitpython-neopixel>=6.3 \
|
||||
pillow>=10.0 \
|
||||
python-rtmidi>=1.5 \
|
||||
pyserial>=3.5 \
|
||||
pyyaml>=6.0 \
|
||||
orjson>=3.9
|
||||
fi
|
||||
|
||||
ok "Python virtual environment ready ($PEDAL_DIR/.venv)"
|
||||
|
||||
# ──────────────────────────────────────────────────────────────────────────────
|
||||
# Step 4: Real-time audio limits
|
||||
# ──────────────────────────────────────────────────────────────────────────────
|
||||
info "Step 4: Setting real-time priority limits..."
|
||||
|
||||
LIMITS_FILE="/etc/security/limits.d/99-audio.conf"
|
||||
cat > "$LIMITS_FILE" <<'LIMITS'
|
||||
# Pi Multi-FX Pedal — real-time audio limits
|
||||
@audio - rtprio 95
|
||||
@audio - memlock unlimited
|
||||
@audio - nice -20
|
||||
LIMITS
|
||||
ok "Created $LIMITS_FILE"
|
||||
|
||||
# Add pedal user to audio group
|
||||
if ! groups "$PEDAL_USER" 2>/dev/null | grep -q '\baudio\b'; then
|
||||
usermod -a -G audio "$PEDAL_USER"
|
||||
info "Added '$PEDAL_USER' to audio group"
|
||||
fi
|
||||
# Also create 'pi' user if it exists on DietPi
|
||||
if id pi &>/dev/null && ! groups pi | grep -q '\baudio\b'; then
|
||||
usermod -a -G audio pi
|
||||
info "Added 'pi' to audio group"
|
||||
fi
|
||||
|
||||
ok "RT limits configured"
|
||||
|
||||
# ──────────────────────────────────────────────────────────────────────────────
|
||||
# Step 5: Enable I2C (for OLED display)
|
||||
# ──────────────────────────────────────────────────────────────────────────────
|
||||
info "Step 5: Enabling I2C interface..."
|
||||
|
||||
CONFIG_TXT=""
|
||||
if [[ -f /boot/firmware/config.txt ]]; then
|
||||
CONFIG_TXT="/boot/firmware/config.txt"
|
||||
elif [[ -f /boot/config.txt ]]; then
|
||||
CONFIG_TXT="/boot/config.txt"
|
||||
fi
|
||||
|
||||
if [[ -n "$CONFIG_TXT" ]]; then
|
||||
if ! grep -q "^dtparam=i2c_arm=on" "$CONFIG_TXT" 2>/dev/null; then
|
||||
echo "dtparam=i2c_arm=on" >> "$CONFIG_TXT"
|
||||
info "Enabled I2C in $CONFIG_TXT"
|
||||
else
|
||||
ok "I2C already enabled"
|
||||
fi
|
||||
fi
|
||||
|
||||
# Load I2C kernel module now (so it works before reboot)
|
||||
modprobe i2c_dev 2>/dev/null || true
|
||||
|
||||
ok "I2C configured"
|
||||
|
||||
# ──────────────────────────────────────────────────────────────────────────────
|
||||
# Step 6: Disable unnecessary services (DietPi minimal baseline)
|
||||
# ──────────────────────────────────────────────────────────────────────────────
|
||||
info "Step 6: Disabling unnecessary services..."
|
||||
|
||||
SERVICES_TO_DISABLE=(
|
||||
bluetooth
|
||||
avahi-daemon
|
||||
triggerhappy
|
||||
ModemManager
|
||||
systemd-resolved
|
||||
)
|
||||
|
||||
for svc in "${SERVICES_TO_DISABLE[@]}"; do
|
||||
if systemctl is-enabled "$svc" &>/dev/null 2>&1; then
|
||||
systemctl disable "$svc"
|
||||
systemctl stop "$svc" 2>/dev/null || true
|
||||
info "Disabled: $svc"
|
||||
fi
|
||||
done
|
||||
|
||||
# PulseAudio conflicts with JACK
|
||||
systemctl mask pulseaudio.service 2>/dev/null || true
|
||||
systemctl mask pulseaudio.socket 2>/dev/null || true
|
||||
info "Masked pulseaudio.service/socket"
|
||||
|
||||
# Optional: disable wpa_supplicant if wired-only (prompt on non-unattended)
|
||||
if ! $UNATTENDED; then
|
||||
echo ""
|
||||
read -r -p "Is this pedal wired-only (disable WiFi)? [y/N] " WIRED_ONLY
|
||||
if [[ "$WIRED_ONLY" == "y" || "$WIRED_ONLY" == "Y" ]]; then
|
||||
systemctl disable wpa_supplicant 2>/dev/null || true
|
||||
systemctl mask wpa_supplicant 2>/dev/null || true
|
||||
info "Disabled wpa_supplicant (wired-only mode)"
|
||||
fi
|
||||
fi
|
||||
|
||||
ok "Service minimization complete"
|
||||
|
||||
# ──────────────────────────────────────────────────────────────────────────────
|
||||
# Step 7: Install pedal project files
|
||||
# ──────────────────────────────────────────────────────────────────────────────
|
||||
info "Step 7: Installing pedal project files..."
|
||||
|
||||
if [[ -d "$PROJECT_DIR/src" ]]; then
|
||||
rsync -a --delete \
|
||||
--exclude='.git' \
|
||||
--exclude='__pycache__' \
|
||||
--exclude='*.pyc' \
|
||||
--exclude='.venv' \
|
||||
--exclude='venv' \
|
||||
--exclude='hardware/gerber' \
|
||||
"$PROJECT_DIR/" "$PEDAL_DIR/"
|
||||
ok "Project files staged at $PEDAL_DIR"
|
||||
else
|
||||
warn "No project source found at $PROJECT_DIR — skipping file copy"
|
||||
warn "Clone the repository first:"
|
||||
warn " git clone https://gitea.ourpad.casa/shawn/pi-multifx-pedal.git $PEDAL_DIR"
|
||||
fi
|
||||
|
||||
# ──────────────────────────────────────────────────────────────────────────────
|
||||
# Step 8: Install systemd services
|
||||
# ──────────────────────────────────────────────────────────────────────────────
|
||||
info "Step 8: Installing systemd services..."
|
||||
|
||||
if [[ -f "$PEDAL_DIR/scripts/install_service.sh" ]]; then
|
||||
bash "$PEDAL_DIR/scripts/install_service.sh" "$PEDAL_DIR"
|
||||
else
|
||||
warn "install_service.sh not found — skipping service installation"
|
||||
fi
|
||||
|
||||
# ──────────────────────────────────────────────────────────────────────────────
|
||||
# Step 9: Setup log rotation
|
||||
# ──────────────────────────────────────────────────────────────────────────────
|
||||
info "Step 9: Configuring log rotation..."
|
||||
|
||||
cat > /etc/logrotate.d/pi-multifx-pedal <<'LOGROTATE'
|
||||
/var/log/pi-multifx-pedal/*.log {
|
||||
daily
|
||||
rotate 7
|
||||
compress
|
||||
delaycompress
|
||||
missingok
|
||||
notifempty
|
||||
copytruncate
|
||||
}
|
||||
LOGROTATE
|
||||
ok "Log rotation configured"
|
||||
|
||||
# ──────────────────────────────────────────────────────────────────────────────
|
||||
# Summary
|
||||
# ──────────────────────────────────────────────────────────────────────────────
|
||||
echo ""
|
||||
info "========== Post-Install Complete =========="
|
||||
echo ""
|
||||
echo " System user: $PEDAL_USER"
|
||||
echo " Install dir: $PEDAL_DIR"
|
||||
echo " Audio: JACK + ALSA + RT limits"
|
||||
echo " I2C: Enabled (for OLED)"
|
||||
echo " Unused svcs: bluetooth, avahi, triggerhappy, ModemManager, resolved"
|
||||
echo ""
|
||||
echo " Next steps:"
|
||||
echo " 1. Run scripts/minimize.sh to strip further unused packages & kernel modules"
|
||||
echo " 2. Run scripts/build-minimal-image.sh to produce a flashable image"
|
||||
echo " 3. Reboot to verify everything comes up cleanly"
|
||||
echo " sudo reboot"
|
||||
echo ""
|
||||
echo " Post-reboot verification:"
|
||||
echo " systemctl status pi-multifx-pedal.service"
|
||||
echo " systemctl status jackd.service"
|
||||
echo " free -m | grep Mem"
|
||||
echo " df -h /"
|
||||
echo ""
|
||||
Executable
+328
@@ -0,0 +1,328 @@
|
||||
#!/usr/bin/env bash
|
||||
# ──────────────────────────────────────────────────────────────────────────────
|
||||
# Pi Multi-FX Pedal — System Minimizer
|
||||
#
|
||||
# Profiles current resource usage, then strips away everything not needed
|
||||
# for real-time guitar DSP. Run AFTER dietpi-postinstall.sh (or on any
|
||||
# fresh DietPi/RPi OS install).
|
||||
#
|
||||
# This script is idempotent — safe to run multiple times. The uninstall
|
||||
# list is documented below; review before running in production.
|
||||
#
|
||||
# Usage:
|
||||
# sudo ./minimize.sh [--dry-run] [--aggressive]
|
||||
#
|
||||
# --dry-run Only profile and list, don't remove anything
|
||||
# --aggressive Also remove firmware, locales, docs, Python test packages
|
||||
#
|
||||
# Target: < 60 MB idle RAM, < 500 MB disk
|
||||
# ──────────────────────────────────────────────────────────────────────────────
|
||||
|
||||
set -euo pipefail
|
||||
|
||||
SCRIPT_DIR="$(cd "$(dirname "$0")" && pwd)"
|
||||
PROJECT_DIR="$(dirname "$SCRIPT_DIR")"
|
||||
DRY_RUN=false
|
||||
AGGRESSIVE=false
|
||||
|
||||
for arg in "$@"; do
|
||||
case "$arg" in
|
||||
--dry-run) DRY_RUN=true ;;
|
||||
--aggressive) AGGRESSIVE=true ;;
|
||||
esac
|
||||
done
|
||||
|
||||
# ── Colour helpers ───────────────────────────────────────────────────────────
|
||||
info() { printf "\e[34m[INFO] %s\e[0m\n" "$*"; }
|
||||
ok() { printf "\e[32m[ OK ] %s\e[0m\n" "$*"; }
|
||||
warn() { printf "\e[33m[WARN] %s\e[0m\n" "$*"; }
|
||||
err() { printf "\e[31m[FAIL] %s\e[0m\n" "$*"; }
|
||||
|
||||
# ── Root check ───────────────────────────────────────────────────────────────
|
||||
if [[ $EUID -ne 0 ]]; then
|
||||
err "This script must be run as root (sudo ./minimize.sh)"
|
||||
exit 1
|
||||
fi
|
||||
|
||||
info "========== Pi Multi-FX Pedal — System Minimizer =========="
|
||||
[[ "$DRY_RUN" == true ]] && warn "DRY RUN MODE — no changes will be made"
|
||||
echo ""
|
||||
|
||||
# ══════════════════════════════════════════════════════════════════════════════
|
||||
# Step 0: Baseline — record current state
|
||||
# ══════════════════════════════════════════════════════════════════════════════
|
||||
|
||||
info "Step 0: Recording baseline..."
|
||||
|
||||
BASELINE_FILE="/tmp/pedal-minimize-baseline-$(date +%s).txt"
|
||||
{
|
||||
echo "=== Baseline: $(date -Iseconds) ==="
|
||||
echo ""
|
||||
echo "--- Memory ---"
|
||||
free -m
|
||||
echo ""
|
||||
echo "--- Disk ---"
|
||||
df -h /
|
||||
echo ""
|
||||
echo "--- Top 30 packages by installed size ---"
|
||||
dpkg-query -Wf '${Installed-Size}\t${Package}\n' 2>/dev/null | sort -rn | head -30
|
||||
echo ""
|
||||
echo "--- Enabled systemd services ---"
|
||||
systemctl list-units --type=service --state=running --no-legend 2>/dev/null | awk '{print $1}' | sort
|
||||
echo ""
|
||||
echo "--- Boot time (systemd-analyze) ---"
|
||||
systemd-analyze 2>/dev/null || echo "not available"
|
||||
echo ""
|
||||
echo "--- Kernel modules loaded ---"
|
||||
lsmod | sort
|
||||
} > "$BASELINE_FILE"
|
||||
|
||||
ok "Baseline saved to $BASELINE_FILE"
|
||||
|
||||
# ══════════════════════════════════════════════════════════════════════════════
|
||||
# Step 1: Remove unnecessary packages
|
||||
# ══════════════════════════════════════════════════════════════════════════════
|
||||
|
||||
info "Step 1: Removing unnecessary packages..."
|
||||
|
||||
# ── Packages we KNOW we don't need on a headless audio pedal ──────────────
|
||||
PACKAGES_TO_PURGE=(
|
||||
# Bluetooth (no BT on a pedal)
|
||||
bluez bluez-tools bluez-firmware pi-bluetooth
|
||||
# Printing
|
||||
cups cups-bsd cups-client cups-common cups-core-drivers cups-daemon cups-filters cups-ppdc cups-server-common
|
||||
# Avahi/mDNS (not needed for local audio)
|
||||
avahi-daemon avahi-autoipd avahi-utils
|
||||
# ModemManager
|
||||
modemmanager
|
||||
# Triggerhappy (input daemon — we handle GPIO ourselves)
|
||||
triggerhappy
|
||||
# X11 / display server (headless — OLED is SPI/I2C)
|
||||
xserver-xorg xserver-xorg-core xserver-xorg-legacy x11-common
|
||||
# Desktop environments (shouldn't be installed on minimal DietPi, but just in case)
|
||||
raspberrypi-ui-mods raspberrypi-net-mods
|
||||
lxde lxde-common lxmenu-data lxterminal
|
||||
# Office/libreoffice
|
||||
libreoffice* liblibreoffice*
|
||||
# Web browsers
|
||||
chromium-browser chromium-browser-l10n chromium-codecs-ffmpeg
|
||||
firefox-esr
|
||||
# Games
|
||||
minecraft-pi python3-pgzero
|
||||
# Sound servers that conflict with JACK
|
||||
pulseaudio pulseaudio-utils pulseaudio-module-bluetooth
|
||||
pipewire pipewire-audio pipewire-pulse
|
||||
# WiFi firmware (if wired-only — we prompt below)
|
||||
# Removed conditionally if --aggressive
|
||||
)
|
||||
|
||||
# Actually remove them
|
||||
for pkg in "${PACKAGES_TO_PURGE[@]}"; do
|
||||
if dpkg -l "$pkg" &>/dev/null 2>&1; then
|
||||
if [[ "$DRY_RUN" == true ]]; then
|
||||
info "[DRY RUN] Would purge: $pkg"
|
||||
else
|
||||
apt-get purge -y -qq "$pkg" 2>/dev/null || true
|
||||
ok "Purged: $pkg"
|
||||
fi
|
||||
fi
|
||||
done
|
||||
|
||||
# ── Aggressive mode: remove even more ──────────────────────────────────────
|
||||
if [[ "$AGGRESSIVE" == true ]]; then
|
||||
info "Aggressive mode: removing additional packages..."
|
||||
|
||||
AGGRESSIVE_PACKAGES=(
|
||||
# Firmware (keep only what's needed for boot + I2S)
|
||||
firmware-brcm80211 firmware-atheros firmware-iwlwifi firmware-realtek
|
||||
# Locales (keep only en_US.UTF-8)
|
||||
locales-all language-pack-* language-pack-en-base
|
||||
# Documentation
|
||||
man-db manpages info
|
||||
# Python test packages (not needed at runtime)
|
||||
python3-pytest python3-pytest-asyncio python3-pytest-mock
|
||||
# X11 fonts
|
||||
fonts-* xfonts-*
|
||||
# Unused sound modules for hardware we don't have
|
||||
alsa-base # we use our own /etc/asound.conf
|
||||
# Unused Python packages on DietPi
|
||||
python3-pygame python3-tk
|
||||
)
|
||||
|
||||
for pkg in "${AGGRESSIVE_PACKAGES[@]}"; do
|
||||
if dpkg -l "$pkg" &>/dev/null 2>&1; then
|
||||
if [[ "$DRY_RUN" == true ]]; then
|
||||
info "[DRY RUN] Would purge: $pkg"
|
||||
else
|
||||
apt-get purge -y -qq "$pkg" 2>/dev/null || true
|
||||
ok "Purged: $pkg"
|
||||
fi
|
||||
fi
|
||||
done
|
||||
|
||||
# Remove unused locale data
|
||||
if [[ "$DRY_RUN" == false ]]; then
|
||||
localedef --list-archive 2>/dev/null | grep -v en_US | while read -r locale; do
|
||||
localedef --delete-from-archive "$locale" 2>/dev/null || true
|
||||
done
|
||||
ok "Stripped non-English locales"
|
||||
fi
|
||||
fi
|
||||
|
||||
# Clean up
|
||||
if [[ "$DRY_RUN" == false ]]; then
|
||||
apt-get autoremove --purge -y -qq 2>/dev/null || true
|
||||
apt-get autoclean -y -qq 2>/dev/null || true
|
||||
ok "apt autoremove/autoclean complete"
|
||||
fi
|
||||
|
||||
# ══════════════════════════════════════════════════════════════════════════════
|
||||
# Step 2: Disable unnecessary systemd services
|
||||
# ══════════════════════════════════════════════════════════════════════════════
|
||||
|
||||
info "Step 2: Disabling unnecessary systemd services..."
|
||||
|
||||
SERVICES_TO_DISABLE=(
|
||||
bluetooth
|
||||
avahi-daemon
|
||||
triggerhappy
|
||||
ModemManager
|
||||
systemd-resolved
|
||||
apt-daily.timer
|
||||
apt-daily-upgrade.timer
|
||||
man-db.timer
|
||||
e2scrub_all.timer
|
||||
fstrim.timer
|
||||
)
|
||||
|
||||
for svc in "${SERVICES_TO_DISABLE[@]}"; do
|
||||
if systemctl is-enabled "$svc" &>/dev/null 2>&1; then
|
||||
if [[ "$DRY_RUN" == true ]]; then
|
||||
info "[DRY RUN] Would disable: $svc"
|
||||
else
|
||||
systemctl disable --now "$svc" 2>/dev/null || true
|
||||
ok "Disabled: $svc"
|
||||
fi
|
||||
fi
|
||||
done
|
||||
|
||||
# Mask pulseaudio completely (not just disable)
|
||||
for unit in pulseaudio.service pulseaudio.socket; do
|
||||
if systemctl list-unit-files "$unit" &>/dev/null 2>&1; then
|
||||
if [[ "$DRY_RUN" == true ]]; then
|
||||
info "[DRY RUN] Would mask: $unit"
|
||||
else
|
||||
systemctl mask "$unit" 2>/dev/null || true
|
||||
ok "Masked: $unit"
|
||||
fi
|
||||
fi
|
||||
done
|
||||
|
||||
# ══════════════════════════════════════════════════════════════════════════════
|
||||
# Step 3: Remove unused kernel modules
|
||||
# ══════════════════════════════════════════════════════════════════════════════
|
||||
|
||||
info "Step 3: Removing unnecessary kernel modules..."
|
||||
|
||||
BLACKLIST_FILE="/etc/modprobe.d/pedal-blacklist.conf"
|
||||
if [[ "$DRY_RUN" == false ]]; then
|
||||
cat > "$BLACKLIST_FILE" <<'BLACKLIST'
|
||||
# Pi Multi-FX Pedal — blacklist unused kernel modules
|
||||
# Audio subsystems we don't use
|
||||
blacklist snd_bcm2835
|
||||
blacklist snd_usb_audio
|
||||
blacklist snd_usbmidi_lib
|
||||
blacklist snd_rawmidi
|
||||
blacklist snd_seq_device
|
||||
blacklist snd_hwdep
|
||||
blacklist snd_hda_intel
|
||||
blacklist snd_hda_codec
|
||||
blacklist snd_hda_core
|
||||
|
||||
# Bluetooth
|
||||
blacklist bluetooth
|
||||
blacklist btusb
|
||||
blacklist btbcm
|
||||
|
||||
# WiFi (wired-only mode)
|
||||
blacklist brcmfmac
|
||||
blacklist brcmutil
|
||||
|
||||
# Unused input devices
|
||||
blacklist joydev
|
||||
blacklist uvcvideo
|
||||
blacklist videobuf2_v4l2
|
||||
|
||||
# Unused storage
|
||||
blacklist r8152 # Realtek USB NIC
|
||||
blacklist xhci_pci # USB 3.0 (not needed on headless pedal)
|
||||
BLACKLIST
|
||||
ok "Kernel module blacklist: $BLACKLIST_FILE"
|
||||
else
|
||||
info "[DRY RUN] Would write: $BLACKLIST_FILE"
|
||||
fi
|
||||
|
||||
# ══════════════════════════════════════════════════════════════════════════════
|
||||
# Step 4: Profile and measure
|
||||
# ══════════════════════════════════════════════════════════════════════════════
|
||||
|
||||
info "Step 4: Profiling post-minimization footprint..."
|
||||
|
||||
AFTER_FILE="/tmp/pedal-minimize-after-$(date +%s).txt"
|
||||
{
|
||||
echo "=== After Minimize: $(date -Iseconds) ==="
|
||||
echo ""
|
||||
echo "--- Memory ---"
|
||||
free -m
|
||||
echo ""
|
||||
echo "--- Disk ---"
|
||||
df -h /
|
||||
echo ""
|
||||
echo "--- Top 10 packages by installed size ---"
|
||||
dpkg-query -Wf '${Installed-Size}\t${Package}\n' 2>/dev/null | sort -rn | head -10
|
||||
echo ""
|
||||
echo "--- Running services ---"
|
||||
systemctl list-units --type=service --state=running --no-legend 2>/dev/null | awk '{print $1}' | sort
|
||||
echo ""
|
||||
echo "--- systemd-analyze blame ---"
|
||||
systemd-analyze blame 2>/dev/null | head -20 || echo "not available"
|
||||
} > "$AFTER_FILE"
|
||||
|
||||
ok "Post-minimize profile saved to $AFTER_FILE"
|
||||
|
||||
# ── Compute and display deltas ────────────────────────────────────────────────
|
||||
echo ""
|
||||
info "========== Before / After Summary =========="
|
||||
|
||||
# RAM
|
||||
BEFORE_MEM=$(grep "^Mem:" "$BASELINE_FILE" 2>/dev/null | awk '{print $4}')
|
||||
AFTER_MEM=$(grep "^Mem:" "$AFTER_FILE" 2>/dev/null | awk '{print $4}')
|
||||
BEFORE_MEM_TOTAL=$(grep "^Mem:" "$BASELINE_FILE" 2>/dev/null | awk '{print $2}')
|
||||
echo " RAM: ${BEFORE_MEM:-?} → ${AFTER_MEM:-?} MB free (of ${BEFORE_MEM_TOTAL:-?} MB total)"
|
||||
|
||||
# Disk
|
||||
BEFORE_DISK=$(grep "^/dev/root" "$BASELINE_FILE" 2>/dev/null | awk '{print $4}')
|
||||
AFTER_DISK=$(grep "^/dev/root" "$AFTER_FILE" 2>/dev/null | awk '{print $4}')
|
||||
echo " Disk: ${BEFORE_DISK:-?} → ${AFTER_DISK:-?} available"
|
||||
|
||||
# Package count
|
||||
BEFORE_PKGS=$(dpkg-query -f '.\n' -W 2>/dev/null | wc -l)
|
||||
echo " Packages: $BEFORE_PKGS installed (after removal)"
|
||||
|
||||
echo ""
|
||||
if [[ "$DRY_RUN" == true ]]; then
|
||||
warn "DRY RUN — no changes were made"
|
||||
info "Re-run without --dry-run to apply changes"
|
||||
else
|
||||
ok "Minimization complete!"
|
||||
info "Baseline: $BASELINE_FILE"
|
||||
info "After: $AFTER_FILE"
|
||||
echo ""
|
||||
info "A reboot is recommended to fully apply kernel module blacklist:"
|
||||
echo " sudo reboot"
|
||||
echo ""
|
||||
info "After reboot, verify footprint:"
|
||||
echo " free -m | grep Mem"
|
||||
echo " df -h /"
|
||||
echo " systemd-analyze"
|
||||
fi
|
||||
Reference in New Issue
Block a user