Added build docker images for debian and others

builder/startup/generate_container_user

@@ -0,0 +1,37 @@
+# Set current user in nss_wrapper
+USER_ID=$(id -u)
+GROUP_ID=$(id -g)
+echo "USER_ID: $USER_ID, GROUP_ID: $GROUP_ID"
+
+# Attempt to set the username to the kasm username
+USERNAME=${VNC_USER:-default}
+# Make the username posix compliant
+USERNAME=$(echo "$USERNAME" | sed -r 's#[^a-zA-Z0-9\._\-]#_#g')
+if ! echo "$USERNAME" | grep -qP "^[a-zA-Z0-9_\.][a-zA-Z0-9_\-\.]*"; then
+    USERNAME="default"
+fi
+export PS1="$USERNAME:\w\$ "
+
+if [ x"$USER_ID" != x"0" ]; then
+
+    NSS_WRAPPER_PASSWD=/tmp/passwd
+    NSS_WRAPPER_GROUP=/etc/group
+
+    cat /etc/passwd > $NSS_WRAPPER_PASSWD
+
+    echo "${USERNAME}:x:${USER_ID}:${GROUP_ID}:Default Application User:${HOME}:/bin/bash" >> $NSS_WRAPPER_PASSWD
+
+    export NSS_WRAPPER_PASSWD
+    export NSS_WRAPPER_GROUP
+
+    if [ -r /usr/lib/libnss_wrapper.so ]; then
+        LD_PRELOAD=/usr/lib/libnss_wrapper.so
+    elif [ -r /usr/lib64/libnss_wrapper.so ]; then
+        LD_PRELOAD=/usr/lib64/libnss_wrapper.so
+    else
+        echo "no libnss_wrapper.so installed!"
+        exit 1
+    fi
+    echo "nss_wrapper location: $LD_PRELOAD"
+    export LD_PRELOAD
+fi

builder/startup/vnc_startup.sh

@@ -0,0 +1,68 @@
+#!/bin/bash
+### every exit != 0 fails the script
+set -e
+
+# should also source $STARTUPDIR/generate_container_user
+source $HOME/.bashrc
+
+## correct forwarding of shutdown signal
+cleanup () {
+    kill -s SIGTERM $!
+    exit 0
+}
+trap cleanup SIGINT SIGTERM
+
+## resolve_vnc_connection
+VNC_IP=$(hostname -i)
+
+# first entry is control, second is view (if only one is valid for both)
+mkdir -p "$HOME/.vnc"
+PASSWD_PATH="$HOME/.vnc/passwd"
+echo "$VNC_PW" | kasmvncpasswd -f > $HOME/.kasmpasswd
+chmod 0600 $HOME/.kasmpasswd
+openssl req -x509 -nodes -days 3650 -newkey rsa:2048 -keyout $HOME/.vnc/self.pem -out $HOME/.vnc/self.pem -subj "/C=US/ST=VA/L=None/O=None/OU=DoFu/CN=kasm/emailAddress=none@none.none"
+
+vncserver :1 -interface 0.0.0.0
+vncserver -kill :1
+
+if [[ -f $PASSWD_PATH ]]; then
+    rm -f $PASSWD_PATH
+fi
+
+#echo "$VNC_PW" | vncpasswd -f > $PASSWD_PATH
+#echo "$VNC_VIEW_ONLY_PW" | vncpasswd -f >> $PASSWD_PATH
+#chmod 600 $PASSWD_PATH
+
+unset VNC_VIEW_ONLY_PW
+unset VNC_PW
+
+if [[ $DEBUG == true ]]; then
+  echo -e "\n------------------ start VNC server ------------------------"
+  echo "remove old vnc locks to be a reattachable container"
+fi
+vncserver -kill $DISPLAY &> $HOME/.vnc/vnc_startup.log \
+    || rm -rfv /tmp/.X*-lock /tmp/.X11-unix &> $HOME/.vnc/vnc_startup.log \
+    || echo "no locks present"
+
+echo -e "start vncserver with param: VNC_COL_DEPTH=$VNC_COL_DEPTH, VNC_RESOLUTION=$VNC_RESOLUTION\n..."
+vncserver $DISPLAY -depth $VNC_COL_DEPTH -geometry $VNC_RESOLUTION -FrameRate=$MAX_FRAME_RATE -websocketPort $VNC_PORT -cert $HOME/.vnc/self.pem -sslOnly -interface 0.0.0.0 $VNCOPTIONS #&> $STARTUPDIR/no_vnc_startup.log
+
+PID_SUN=$!
+
+echo -e "start window manager\n..."
+$STARTUPDIR/window_manager_startup.sh #&> $STARTUPDIR/window_manager_startup.log
+
+## log connect options
+echo -e "\n\n------------------ VNC environment started ------------------"
+echo -e "\nVNCSERVER started on DISPLAY= $DISPLAY \n\t=> connect via VNC viewer with $VNC_IP:$VNC_PORT"
+echo -e "\nnoVNC HTML client started:\n\t=> connect via http://$VNC_IP:$NO_VNC_PORT/?password=...\n"
+echo "WEB PID: $PID_SUB"
+
+# tail vncserver logs
+tail -f $HOME/.vnc/*$DISPLAY.log &
+
+eval "$@"
+
+wait $PID_SUB
+
+echo "Exiting Kasm container"

builder/startup/window_manager_startup.sh

@@ -0,0 +1,15 @@
+#!/usr/bin/env bash
+set -e
+
+echo -e "\n------------------ Xfce4 window manager startup------------------"
+
+### disable screen saver and power management
+xset -dpms &
+xset s noblank &
+xset s off &
+
+if [ "$SINGLE_APPLICATION" -eq "1" ]; then
+    echo "Configured of Single Application Mode"
+    sed -i "s/O|SHMC/|/g" $HOME/.config/xfce4/xfconf/xfce-perchannel-xml/xfwm4.xml
+    #xfwm4 --daemon
+fi