feat(kasmvnc): support images without sudo access

- Allow KasmVNC to be installed and run on systems where `sudo` is not available.
- Automatically adjust config file location and server start method based on `sudo` availability.
- Enhance portability for broader usage across various environments.

kasmvnc/README.md

@@ -14,7 +14,7 @@ Automatically install [KasmVNC](https://kasmweb.com/kasmvnc) in a workspace, and
 ```tf
 module "kasmvnc" {
   source              = "registry.coder.com/modules/kasmvnc/coder"
-  version             = "1.0.22"
+  version             = "1.0.23"
   agent_id            = coder_agent.example.id
   desktop_environment = "xfce"
 }

kasmvnc/run.sh

@@ -75,6 +75,8 @@ install_alpine() {
   rm /tmp/kasmvncserver.tgz
 }
 
+# Check if vncserver is installed, and install if not
+if ! check_installed; then
   # Detect system information
   distro=$(grep "^ID=" /etc/os-release | awk -F= '{print $2}')
   version=$(grep "^VERSION_ID=" /etc/os-release | awk -F= '{print $2}' | tr -d '"')
@@ -102,8 +104,6 @@ else
     exit 1
   fi
 
-# Check if vncserver is installed, and install if not
-if ! check_installed; then
   echo "Installing KASM version: ${VERSION}"
   case $distro in
     ubuntu | debian | kali)
@@ -158,8 +158,11 @@ else
   echo "vncserver already installed. Skipping installation."
 fi
 
-# Coder port-forwarding from dashboard only supports HTTP
-sudo bash -c "cat > /etc/kasmvnc/kasmvnc.yaml <<EOF
+# if sudo is not available, create the config file as the current user .vnc/kasmvnc.yaml
+config_path="~/.vnc/kasmvnc.yaml"
+[ sudo -n true ] 2> /dev/null && config_path="/etc/kasmvnc/kasmvnc.yaml"
+
+sudo bash -c "cat > $config_path <<EOF
 network:
   protocol: http
   websocket_port: ${PORT}
@@ -176,4 +179,8 @@ echo -e "password\npassword\n" | vncpasswd -wo -u $USER
 
 # Start the server
 printf "🚀 Starting KasmVNC server...\n"
+if sudo -n true 2> /dev/null; then
   sudo -u $USER bash -c "vncserver -select-de ${DESKTOP_ENVIRONMENT} -disableBasicAuth" > /tmp/kasmvncserver.log 2>&1 &
+else
+  vncserver -select-de ${DESKTOP_ENVIRONMENT} -disableBasicAuth > /tmp/kasmvncserver.log 2>&1 &
+fi