完善虚拟机连接

VM/novnc/snap/hooks/configure

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+#!/bin/sh -e
+
+snapctl restart novnc.novncsvc

VM/novnc/snap/local/svc_wrapper.sh

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+#!/bin/bash
+
+# `snapctl get services` returns a JSON array, example:
+#{
+#"n6801": {
+#   "listen": 6801,
+#   "vnc": "localhost:5901"
+#},
+#"n6802": {
+#    "listen": 6802,
+#   "vnc": "localhost:5902"
+#}
+#}
+snapctl get services | jq -c '.[]' | while read service; do # for each service the user sepcified..
+    # get the important data for the service (listen port, VNC host:port)
+    listen_port="$(echo $service | jq --raw-output '.listen')"
+    vnc_host_port="$(echo $service | jq --raw-output '.vnc')" # --raw-output removes any quotation marks from the output
+    
+    # check whether those values are valid
+    expr "$listen_port" : '^[0-9]\+$' > /dev/null
+    listen_port_valid=$?
+    if [ ! $listen_port_valid ] || [ -z "$vnc_host_port" ]; then
+        # invalid values mean the service is disabled, do nothing except for printing a message (logged in /var/log/system or systemd journal)
+        echo "novnc: not starting service ${service} with listen_port ${listen_port} and vnc_host_port ${vnc_host_port}"
+    else
+        # start (and fork with '&') the service using the specified listen port and VNC host:port
+        $SNAP/novnc_proxy --listen $listen_port --vnc $vnc_host_port &
+    fi
+done

VM/novnc/snap/snapcraft.yaml

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+name: novnc
+base: core22 # the base snap is the execution environment for this snap
+version: git
+summary: Open Source VNC client using HTML5 (WebSockets, Canvas)
+description: |
+  Open Source VNC client using HTML5 (WebSockets, Canvas).
+  noVNC is both a VNC client JavaScript library as well as an
+  application built on top of that library. noVNC runs well in any
+  modern browser including mobile browsers (iOS and Android).
+
+grade: stable
+confinement: strict
+
+parts:
+    novnc:
+        source: .
+        plugin: dump
+        organize:
+            utils/novnc_proxy: /
+        stage:
+            - vnc.html
+            - app
+            - core/**/*.js
+            - vendor/**/*.js
+            - novnc_proxy
+
+    novnc-deps:
+        plugin: nil
+        stage-packages:
+            - bash
+
+    svc-script:
+        source: snap/local
+        plugin: dump
+        stage:
+            - svc_wrapper.sh
+
+    svc-script-deps:
+        plugin: nil
+        stage-packages:
+            - bash
+            - jq
+
+    websockify:
+        source: https://github.com/novnc/websockify/archive/v0.12.0.tar.gz
+        plugin: python
+        stage-packages:
+            - python3-numpy
+
+hooks:
+    configure:
+        plugs: [network, network-bind]
+
+apps:
+    novnc:
+        command: ./novnc_proxy
+        plugs: [network, network-bind]
+    novncsvc:
+        command: ./svc_wrapper.sh
+        daemon: forking
+        plugs: [network, network-bind]