first commit

Dockerfile

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+FROM alpine:3.21
+
+RUN apk add --no-cache \
+    xrdp \
+    xorgxrdp \
+    openbox \
+    xorg-server \
+    xf86-video-dummy \
+    font-noto \
+    dbus \
+    firefox \
+    mesa-dri-gallium \
+    ttf-freefont \
+    openssl \
+    && rm -rf /var/cache/apk/*
+
+# Create rdpuser
+RUN adduser -D -s /bin/sh rdpuser \
+    && adduser rdpuser wheel
+
+# Configure xrdp to use Xorg
+RUN sed -i 's/^#\?security_layer=.*/security_layer=tls/' /etc/xrdp/xrdp.ini \
+    && sed -i 's/^#\?crypt_level=.*/crypt_level=high/' /etc/xrdp/xrdp.ini \
+    && sed -i 's|^#\?param=Xorg|param=Xorg|' /etc/xrdp/sesman.ini
+
+# Xorg wrapper for xrdp sessions
+COPY config/startwm.sh /etc/xrdp/startwm.sh
+RUN chmod +x /etc/xrdp/startwm.sh
+
+# Openbox config for rdpuser
+COPY config/openbox/ /home/rdpuser/.config/openbox/
+RUN chown -R rdpuser:rdpuser /home/rdpuser
+
+COPY entrypoint.sh /entrypoint.sh
+
+EXPOSE 3389
+
+ENTRYPOINT ["/entrypoint.sh"]

README.md

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+# Alpine RDP with Openbox & Firefox
+
+Minimaler Docker-Container basierend auf Alpine Linux mit xrdp, Openbox und Firefox.
+
+## Voraussetzungen
+
+- Docker
+- Docker Compose
+
+## Konfiguration
+
+`.env`-Datei anlegen (siehe `.env.example`):
+
+```env
+RDP_PASSWORD=Start1234!
+FIREFOX_URL=https://www.google.de
+```
+
+| Variable | Beschreibung |
+|---|---|
+| `RDP_PASSWORD` | Passwort fuer den RDP-Benutzer `rdpuser` |
+| `FIREFOX_URL` | Startseite, die Firefox beim Oeffnen laedt |
+
+## Starten
+
+```bash
+docker compose up -d --build
+```
+
+## Verbinden
+
+Per RDP-Client (z.B. Remmina, mstsc) verbinden:
+
+- **Host:** `localhost`
+- **Port:** `3389`
+- **Benutzer:** `rdpuser`
+- **Passwort:** wie in `.env` gesetzt
+
+## Openbox-Menue
+
+Rechtsklick auf den Desktop oeffnet das Menue:
+
+- **Firefox** - Browser mit konfigurierter Startseite
+- **Logoff** - Sitzung beenden
+
+## Persistenz
+
+Firefox-Profildaten werden im Ordner `./firefox-data` gespeichert und bleiben bei Container-Neustarts erhalten.
+
+## Stoppen
+
+```bash
+docker compose down
+```

config/openbox/autostart

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+firefox &

config/openbox/menu.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<openbox_menu xmlns="http://openbox.org/3.4/menu">
+  <menu id="root-menu" label="Menu">
+    <item label="Firefox">
+      <action name="Execute">
+        <execute>firefox</execute>
+      </action>
+    </item>
+    <separator/>
+    <item label="Logoff">
+      <action name="Exit"/>
+    </item>
+  </menu>
+</openbox_menu>

config/openbox/rc.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<openbox_config xmlns="http://openbox.org/3.4/rc">
+  <resistance>
+    <strength>10</strength>
+    <screen_edge_strength>20</screen_edge_strength>
+  </resistance>
+  <focus>
+    <focusNew>yes</focusNew>
+    <followMouse>no</followMouse>
+  </focus>
+  <theme>
+    <name>Clearlooks</name>
+  </theme>
+  <menu>
+    <file>menu.xml</file>
+  </menu>
+  <desktops>
+    <number>1</number>
+  </desktops>
+  <mouse>
+    <context name="Root">
+      <mousebind button="Right" action="Press">
+        <action name="ShowMenu">
+          <menu>root-menu</menu>
+        </action>
+      </mousebind>
+    </context>
+  </mouse>
+  <applications>
+    <application class="*">
+      <maximized>yes</maximized>
+    </application>
+  </applications>
+</openbox_config>

config/startwm.sh

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+#!/bin/sh
+export DISPLAY=${DISPLAY:-:10}
+
+if [ -r /etc/profile ]; then
+    . /etc/profile
+fi
+
+# Start dbus session
+if command -v dbus-launch >/dev/null 2>&1; then
+    eval $(dbus-launch --sh-syntax)
+fi
+
+exec openbox-session

docker-compose.yml

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+services:
+  alpine-rdp:
+    build: .
+    container_name: alpine-rdp-firefox
+    environment:
+      - RDP_PASSWORD=${RDP_PASSWORD}
+      - FIREFOX_URL=${FIREFOX_URL}
+    network_mode: host
+    volumes:
+      - ./firefox-data:/home/rdpuser/.mozilla/firefox
+    shm_size: "1g"
+    restart: unless-stopped

entrypoint.sh

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+#!/bin/sh
+set -e
+
+USERNAME="rdpuser"
+PASSWORD="${RDP_PASSWORD:-changeme}"
+FIREFOX_URL="${FIREFOX_URL:-https://www.google.com}"
+
+# Set password for rdpuser
+echo "${USERNAME}:${PASSWORD}" | chpasswd
+
+# Ensure firefox profile dir has correct ownership (volume mount)
+mkdir -p "/home/${USERNAME}/.mozilla/firefox"
+chown -R "${USERNAME}:${USERNAME}" "/home/${USERNAME}/.mozilla"
+
+# Create autoconfig files for Firefox default homepage
+cat > /usr/lib/firefox/defaults/pref/autoconfig.js <<EOF
+pref("general.config.filename", "firefox.cfg");
+pref("general.config.obscure_value", 0);
+EOF
+
+cat > /usr/lib/firefox/firefox.cfg <<EOF
+// Firefox configuration
+defaultPref("browser.startup.homepage", "${FIREFOX_URL}");
+defaultPref("browser.startup.page", 1);
+EOF
+
+chown -R "${USERNAME}:${USERNAME}" "/home/${USERNAME}"
+
+# Generate xrdp keys if missing
+if [ ! -f /etc/xrdp/rsakeys.ini ]; then
+    xrdp-keygen xrdp /etc/xrdp/rsakeys.ini
+fi
+
+# Start xrdp services
+xrdp-sesman --nodaemon &
+exec xrdp --nodaemon