Initial commit

Dockerfile

@@ -0,0 +1,16 @@
+# syntax=docker/dockerfile:1
+FROM jayfield/novnc-baseimage
+
+RUN openssl req -x509 -nodes -newkey rsa:2048 -keyout /tmp/novnc.key -out /tmp/novnc.pem -days 3650 -subj "/C=US/ST=NY/L=NY/O=NY/OU=NY/CN=NY emailAddress=email@example.com"
+ENV DISPLAY_NUM=99
+ENV DISPLAY=:${DISPLAY_NUM}
+RUN touch /root/.Xauthority
+
+ADD scripts /opt/scripts/
+
+EXPOSE 5900
+
+ENTRYPOINT ["/opt/scripts/server_start.sh", "/opt/scripts/server.sh"]
+
+# see also
+# https://github.com/ich777/docker-krusader

create.sh

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+#/bin/bash
+
+docker create --name='novnc-server' --net='bridge' -e 'DISPLAY_NUM'='99' -e 'SCREEN_W'='1536' -e 'SCREEN_H'='960' -p '5910:5999/tcp' -p '8099:8099/tcp' 'jayfield/novnc-server'

run.sh

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+#/bin/bash
+
+DISPLAY_NUM=99
+docker run --rm --net bridge -p 5910:59${DISPLAY_NUM}/tcp -e DISPLAY_NUM=${DISPLAY_NUM} -e SCREEN_W=1536 -e SCREEN_H=960 -it $1 bash --login

scripts/server.sh

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+#!/usr/bin/env bash
+set -x
+
+RFB_PORT=59${DISPLAY_NUM}
+NOVNC_PORT=80${DISPLAY_NUM}
+
+echo Display at ${DISPLAY} with ${SCREEN_W}x${SCREEN_H}x24
+/opt/TurboVNC/bin/Xvnc ${DISPLAY} -geometry ${SCREEN_W}x${SCREEN_H} -depth 24 +xinerama -securitytypes none >/var/log/xvfb.log &
+icewm-session -o /var/log/icewm.log &
+/tmp/websockify/run -D --web=/tmp/noVNC/ --cert=/tmp/novnc.pem --key=/tmp/novnc.key ${NOVNC_PORT} localhost:${RFB_PORT}
+socat TCP-LISTEN:60${DISPLAY_NUM},fork,bind=0.0.0.0 UNIX-CONNECT:/tmp/.X11-unix/X${DISPLAY_NUM}
+

scripts/server_start.sh

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+#!/usr/bin/env bash
+APP=$1
+set -x
+
+# Signal helper
+source /opt/scripts/signals.sh
+
+PID=0
+TERM_handler() {
+    SIGNAME="$1"
+    echo "Killing ${PID}"
+    echo "Signal ${SIGNAME}"
+    if [ ${PID} -ne 0 ]; then
+        ps -ef --forest
+        CHILDS=$(pgrep -P "${PID}")
+        kill -"${SIGNAME}" -"${PID}"
+        for i in $CHILDS; do
+          wait $i
+        done
+    fi
+    ps -ef --forest
+    ret=$(signal_return_val ${SIGNAME})
+    exit $ret
+}
+
+signals_trap_with_arg TERM_handler SIGTERM
+${APP} &
+PID=$$
+
+# wait forever
+signals_wait_forever
+
+# https://docs.docker.com/compose/faq/
+# https://medium.com/@gchudnov/trapping-signals-in-docker-containers-7a57fdda7d86

scripts/signals.sh

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+signals_trap_with_arg() {
+    func="$1" ; shift
+    for sig ; do
+        echo "$func $sig"
+        trap "$func $sig" "$sig"
+    done
+}
+
+signals_wait_forever() {
+    while true
+    do
+        tail -f /dev/null & wait ${!}
+    done
+}
+
+signal_name_to_number() {
+    SIGNAME="$1"
+    trap -l | sed -nr "s/.*\b([0-9]+)\) $SIGNAME.*/\1/p"
+}
+
+signal_return_val() {
+    SIGNAME="$1"
+    SIGNUM=$(signal_name_to_number ${SIGNAME})
+    echo "128 + $SIGNUM" | bc
+}