Improve Docker VM setup and error handling

Updated default machine type to Q35 and improved user messaging for machine selection. Enhanced Docker and base package installation with DNS configuration and fallback to cloud-init if installation fails. Refactored Portainer installation logic and improved status reporting for Docker setup.

vm/docker-vm.sh

@@ -294,8 +294,8 @@ function default_settings() {
 
   # Set defaults for other settings
   VMID=$(get_valid_nextid)
-  FORMAT=",efitype=4m"
+  FORMAT=""
-  MACHINE=""
+  MACHINE=" -machine q35"
   DISK_CACHE=""
   DISK_SIZE="10G"
   HN="docker"
@@ -311,7 +311,7 @@ function default_settings() {
 
   # Display summary
   echo -e "${CONTAINERID}${BOLD}${DGN}Virtual Machine ID: ${BGN}${VMID}${CL}"
-  echo -e "${CONTAINERTYPE}${BOLD}${DGN}Machine Type: ${BGN}i440fx${CL}"
+  echo -e "${CONTAINERTYPE}${BOLD}${DGN}Machine Type: ${BGN}Q35 (Modern)${CL}"
   echo -e "${DISKSIZE}${BOLD}${DGN}Disk Size: ${BGN}${DISK_SIZE}${CL}"
   echo -e "${DISKSIZE}${BOLD}${DGN}Disk Cache: ${BGN}None${CL}"
   echo -e "${HOSTNAME}${BOLD}${DGN}Hostname: ${BGN}${HN}${CL}"
@@ -356,15 +356,15 @@ function advanced_settings() {
   done
 
   if MACH=$(whiptail --backtitle "Proxmox VE Helper Scripts" --title "MACHINE TYPE" --radiolist --cancel-button Exit-Script "Choose Type" 10 58 2 \
-    "i440fx" "Machine i440fx" ON \
+    "q35" "Q35 (Modern, PCIe)" ON \
-    "q35" "Machine q35" OFF \
+    "i440fx" "i440fx (Legacy, PCI)" OFF \
     3>&1 1>&2 2>&3); then
     if [ $MACH = q35 ]; then
-      echo -e "${CONTAINERTYPE}${BOLD}${DGN}Machine Type: ${BGN}$MACH${CL}"
+      echo -e "${CONTAINERTYPE}${BOLD}${DGN}Machine Type: ${BGN}Q35 (Modern)${CL}"
       FORMAT=""
       MACHINE=" -machine q35"
     else
-      echo -e "${CONTAINERTYPE}${BOLD}${DGN}Machine Type: ${BGN}$MACH${CL}"
+      echo -e "${CONTAINERTYPE}${BOLD}${DGN}Machine Type: ${BGN}i440fx (Legacy)${CL}"
       FORMAT=",efitype=4m"
       MACHINE=""
     fi
@@ -606,11 +606,66 @@ done
 
 msg_info "Adding Docker and Docker Compose to ${OS_DISPLAY} Qcow2 Disk Image"
 
-# Install base packages including qemu-guest-agent
+# Configure DNS before package installation
-virt-customize -q -a "${FILE}" --install qemu-guest-agent,curl,ca-certificates >/dev/null
+msg_info "Configuring DNS resolvers for package installation"
+virt-customize -q -a "${FILE}" --run-command "echo 'nameserver 8.8.8.8' > /etc/resolv.conf" >/dev/null 2>&1
+virt-customize -q -a "${FILE}" --run-command "echo 'nameserver 1.1.1.1' >> /etc/resolv.conf" >/dev/null 2>&1
 
+# Install base packages including qemu-guest-agent
+msg_info "Installing qemu-guest-agent and base packages"
+if ! virt-customize -v -x -a "${FILE}" --install qemu-guest-agent,curl,ca-certificates 2>&1 | tee /tmp/virt-customize-$VMID.log | grep -q "error"; then
+  msg_ok "Base packages installed successfully"
+else
+  msg_error "Failed to install base packages. Check /tmp/virt-customize-$VMID.log"
+  echo "Debug info:"
+  tail -20 /tmp/virt-customize-$VMID.log
+
+  # Try alternative: Install packages after first boot via cloud-init
+  msg_info "Fallback: Will install packages via cloud-init on first boot"
+  virt-customize -q -a "${FILE}" --run-command "cat > /root/install-docker.sh << 'INSTALLEOF'
+#!/bin/bash
+# Wait for network
+sleep 10
+# Update DNS
+echo 'nameserver 8.8.8.8' > /etc/resolv.conf
+echo 'nameserver 1.1.1.1' >> /etc/resolv.conf
+# Install packages
+apt-get update
+apt-get install -y qemu-guest-agent curl ca-certificates
+# Install Docker
+curl -fsSL https://get.docker.com | sh
+systemctl enable docker
+systemctl start docker
+# Create flag file
+touch /root/.docker-installed
+INSTALLEOF" >/dev/null
+
+  virt-customize -q -a "${FILE}" --run-command "chmod +x /root/install-docker.sh" >/dev/null
+  virt-customize -q -a "${FILE}" --run-command "cat > /etc/systemd/system/install-docker.service << 'SERVICEEOF'
+[Unit]
+Description=Install Docker on First Boot
+After=network-online.target
+Wants=network-online.target
+
+[Service]
+Type=oneshot
+ExecStart=/root/install-docker.sh
+RemainAfterExit=yes
+
+[Install]
+WantedBy=multi-user.target
+SERVICEEOF" >/dev/null
+
+  virt-customize -q -a "${FILE}" --run-command "systemctl enable install-docker.service" >/dev/null
+  msg_ok "Configured Docker installation for first boot"
+  DOCKER_INSTALLED_ON_FIRST_BOOT="yes"
+fi
+
+# Only continue if packages were installed successfully
+if [ "$DOCKER_INSTALLED_ON_FIRST_BOOT" != "yes" ]; then
   # Install Docker using the official convenience script (includes Docker Compose v2)
-virt-customize -q -a "${FILE}" --run-command "curl -fsSL https://get.docker.com | sh" >/dev/null
+  msg_info "Installing Docker via get.docker.com"
+  virt-customize -q -a "${FILE}" --run-command "curl -fsSL https://get.docker.com | sh" >/dev/null 2>&1
   virt-customize -q -a "${FILE}" --run-command "systemctl enable docker" >/dev/null
 
   # Optimize Docker daemon configuration
@@ -648,13 +703,14 @@ PORTEOF" >/dev/null
     virt-customize -q -a "${FILE}" --run-command "systemctl enable portainer.service" >/dev/null
   fi
 
+  msg_ok "Added Docker and Docker Compose to ${OS_DISPLAY} Qcow2 Disk Image successfully"
+fi
+
 # Set hostname and clean machine-id
 virt-customize -q -a "${FILE}" --hostname "${HN}" >/dev/null
 virt-customize -q -a "${FILE}" --run-command "truncate -s 0 /etc/machine-id" >/dev/null
 virt-customize -q -a "${FILE}" --run-command "rm -f /var/lib/dbus/machine-id" >/dev/null
 
-msg_ok "Added Docker and Docker Compose to ${OS_DISPLAY} Qcow2 Disk Image successfully"
-
 msg_info "Expanding root partition to use full disk space"
 qemu-img create -f qcow2 expanded.qcow2 ${DISK_SIZE} >/dev/null 2>&1
 virt-resize --expand /dev/sda1 ${FILE} expanded.qcow2 >/dev/null 2>&1