Improve error handling in UniFi OS VM installer

Enhanced the installation script to provide clearer success and error messages, added exit on critical failures, and improved verification steps for package installation, Podman, and UniFi OS installer. Also refined the startup sequence and logging for better troubleshooting.

vm/unifi-os-vm.sh

@@ -679,46 +679,69 @@ apt-get update
 
 # Install base packages
 echo \"[\$(date)] Installing base packages (this may take several minutes)\"
-DEBIAN_FRONTEND=noninteractive apt-get install -y \
+if DEBIAN_FRONTEND=noninteractive apt-get install -y qemu-guest-agent curl wget ca-certificates podman uidmap slirp4netns iptables; then
-  qemu-guest-agent curl wget ca-certificates podman uidmap slirp4netns iptables 2>/dev/null || true
+  echo \"[\$(date)] ✓ Base packages installed successfully\"
+else
+  echo \"[\$(date)] ✗ ERROR: Failed to install packages\"
+  exit 1
+fi
 
 # Start QEMU Guest Agent
 echo \"[\$(date)] Starting QEMU Guest Agent\"
 systemctl enable qemu-guest-agent 2>/dev/null || true
 systemctl start qemu-guest-agent 2>/dev/null || true
 
-# Configure Podman
+# Configure and start Podman
 echo \"[\$(date)] Configuring Podman\"
 loginctl enable-linger root 2>/dev/null || true
-systemctl enable podman.socket 2>/dev/null || true
-systemctl start podman.socket 2>/dev/null || true
 
-# Verify Podman
+# Verify Podman is working
 echo \"[\$(date)] Verifying Podman installation\"
-podman --version || echo \"WARNING: Podman not responding\"
+if ! podman --version >/dev/null 2>&1; then
+  echo \"[\$(date)] ✗ ERROR: Podman not working after installation\"
+  exit 1
+fi
+echo \"[\$(date)] ✓ Podman $(podman --version)\"
 
 # Download UniFi OS installer
 echo \"[\$(date)] Downloading UniFi OS Server ${UOS_VERSION}\"
-curl -fsSL '${UOS_URL}' -o /root/${UOS_INSTALLER}
+if ! curl -fsSL '${UOS_URL}' -o /root/${UOS_INSTALLER}; then
+  echo \"[\$(date)] ✗ ERROR: Failed to download UniFi OS installer\"
+  exit 1
+fi
 chmod +x /root/${UOS_INSTALLER}
+echo \"[\$(date)] ✓ Downloaded UniFi OS installer\"
 
 # Run UniFi OS installer
-echo \"[\$(date)] Running UniFi OS installer\"
+echo \"[\$(date)] Running UniFi OS installer (this will take 2-5 minutes)\"
-/root/${UOS_INSTALLER} install 2>&1 || echo \"Installation returned exit code \$?\"
+if /root/${UOS_INSTALLER} install; then
+  echo \"[\$(date)] ✓ UniFi OS installer completed successfully\"
+else
+  EXIT_CODE=\$?
+  echo \"[\$(date)] ⚠ Installer exited with code \${EXIT_CODE}\"
+fi
 
-# Wait and start UniFi OS Server
+# Wait for installation to settle
 sleep 10
+
+# Start UniFi OS Server
 if command -v uosserver >/dev/null 2>&1; then
-  echo \"[\$(date)] Starting UniFi OS Server\"
+  echo \"[\$(date)] ✓ uosserver command found\"
   if id -u uosserver >/dev/null 2>&1; then
+    echo \"[\$(date)] Starting UniFi OS Server as uosserver user\"
     su - uosserver -c 'uosserver start' 2>&1 || true
   else
+    echo \"[\$(date)] Starting UniFi OS Server as root\"
     uosserver start 2>&1 || true
   fi
+  sleep 3
   IP=\$(hostname -I | awk '{print \$1}')
-  echo \"[\$(date)] ✓ UniFi OS Server installed - Access at: https://\${IP}:11443\"
+  echo \"[\$(date)] ✓ UniFi OS Server should be accessible at: https://\${IP}:11443\"
 else
-  echo \"[\$(date)] ✗ ERROR: uosserver command not found\"
+  echo \"[\$(date)] ✗ ERROR: uosserver command not found after installation\"
+  echo \"[\$(date)] Checking installation artifacts...\"
+  ls -la /root/ | grep -i unifi || true
+  which uosserver 2>&1 || true
 fi
 
 # Create completion flag
@@ -763,15 +786,6 @@ if virt-customize -a "${FILE}" --install qemu-guest-agent,curl,ca-certificates,p
   fi
 else
   msg_info "Pre-installation not possible, will install on first boot"
-  fi# Add auto-login if Cloud-Init is disabled
-  if [ "$USE_CLOUD_INIT" != "yes" ]; then
-    virt-customize -q -a "${FILE}" \
-      --run-command 'mkdir -p /etc/systemd/system/getty@tty1.service.d' \
-      --run-command "bash -c 'echo -e \"[Service]\nExecStart=\nExecStart=-/sbin/agetty --autologin root --noclear %I \\\$TERM\" > /etc/systemd/system/getty@tty1.service.d/override.conf'" 2>/dev/null
-  fi
-
-  msg_ok "UniFi OS Installer integrated (will run on first boot)"
-
 fi
 
 # Add auto-login if Cloud-Init is disabled
@@ -785,9 +799,7 @@ if [ "$UNIFI_PREINSTALLED" = "yes" ]; then
   msg_ok "UniFi OS Server ${UOS_VERSION} pre-installed in image"
 else
   msg_ok "UniFi OS Server will be installed on first boot"
-fi
+fi# Expand root partition to use full disk space
-
-# Expand root partition to use full disk space
 msg_info "Expanding disk image to ${DISK_SIZE}"
 qemu-img create -f qcow2 expanded.qcow2 ${DISK_SIZE} >/dev/null 2>&1