Improve update in installation script, decrease downtime(#1422)

script/install.sh

@@ -388,48 +388,115 @@ UNINSTALL() {
   echo -e "\r\n${GREEN_COLOR}EasyTier was removed successfully! ${RES}\r\n"
 }
 
+# Minimizes downtime by preparing new files before stopping the service.
+# Correctly handles restarting multiple systemd service instances.
 UPDATE() {
   if [ ! -f "$INSTALL_PATH/easytier-core" ]; then
-    echo -e "\r\n${RED_COLOR}Opus${RES}, unable to find EasyTier\r\n"
+    echo -e "\r\n${RED_COLOR}Error${RES}: EasyTier not found in $INSTALL_PATH. Cannot perform update.\r\n"
     exit 1
-  else
-    echo
-    echo -e "${GREEN_COLOR}Stopping EasyTier process${RES}\r\n"
-    if [ "$INIT_SYSTEM" = "systemd" ]; then
-      systemctl stop "easytier@*"
-    else
-      rc-service easytier stop
-    fi
-    # Backup
-    rm -rf /tmp/easytier_tmp_update
-    mkdir -p  /tmp/easytier_tmp_update
-    cp -a $INSTALL_PATH/* /tmp/easytier_tmp_update/
-    INSTALL
-    if [ -f $INSTALL_PATH/easytier-core ]; then
-      echo -e "${GREEN_COLOR} Verify successfully ${RES}"
-    else
-      echo -e "${RED_COLOR} Download failed, unable to update${RES}"
-      echo "Rollback all ..."
-      rm -rf $INSTALL_PATH/*
-      mv /tmp/easytier_tmp_update/* $INSTALL_PATH/
-      if [ "$INIT_SYSTEM" = "systemd" ]; then
-        systemctl start "easytier@*"
-      else
-        rc-service easytier start
-      fi
-      exit 1
-    fi
-    echo -e "\r\n${GREEN_COLOR} Starting EasyTier process${RES}"
-    if [ "$INIT_SYSTEM" = "systemd" ]; then
-      systemctl start "easytier@*"
-    else
-      rc-service easytier start
-    fi
-    echo -e "\r\n${GREEN_COLOR} EasyTier was updated successfully! ${RES}\r\n"
-    echo -e "\r\n${GREEN_COLOR} EasyTier was the latest stable version! ${RES}\r\n"
   fi
+
+  # 1. Get the latest version info (while service is still running)
+  echo -e "${GREEN_COLOR}Checking for the latest version...${RES}"
+  RESPONSE=$(curl -s "https://api.github.com/repos/EasyTier/EasyTier/releases/latest")
+  LATEST_VERSION=$(echo "$RESPONSE" | grep '"tag_name":' | sed -E 's/.*"([^"]+)".*/\1/')
+  LATEST_VERSION=$(echo -e "$LATEST_VERSION" | tr -d '[:space:]')
+
+  if [ -z "$LATEST_VERSION" ]; then
+    echo -e "\r\n${RED_COLOR}Error${RES}: Failed to get the latest version. Please check your network connection.\r\n"
+    exit 1
+  fi
+
+  echo -e "Latest version found: ${GREEN_COLOR}$LATEST_VERSION${RES}"
+
+  # 2. Download and extract the new version to a temporary directory (while service is still running)
+  TEMP_UPDATE_DIR=$(mktemp -d /tmp/easytier_update_XXXXXX)
+  echo -e "${GREEN_COLOR}Downloading new version to temporary directory: $TEMP_UPDATE_DIR${RES}"
+  
+  BASE_URL="https://github.com/EasyTier/EasyTier/releases/latest/download/easytier-linux-${ARCH}-${LATEST_VERSION}.zip"
+  DOWNLOAD_URL=$($NO_GH_PROXY && echo "$BASE_URL" || echo "${GH_PROXY}${BASE_URL}")
+  
+  echo -e "Download URL: ${GREEN_COLOR}${DOWNLOAD_URL}${RES}"
+  curl -L ${DOWNLOAD_URL} -o "$TEMP_UPDATE_DIR/easytier.zip" $CURL_BAR
+  if [ $? -ne 0 ]; then
+      echo -e "${RED_COLOR}Download failed!${RES}"
+      rm -rf "$TEMP_UPDATE_DIR"
+      exit 1
+  fi
+  
+  unzip -o "$TEMP_UPDATE_DIR/easytier.zip" -d "$TEMP_UPDATE_DIR/"
+  
+  NEW_CORE_FILE="$TEMP_UPDATE_DIR/easytier-linux-${ARCH}/easytier-core"
+  if [ ! -f "$NEW_CORE_FILE" ]; then
+      echo -e "${RED_COLOR}Extraction failed or the downloaded archive is invalid.${RES}"
+      rm -rf "$TEMP_UPDATE_DIR"
+      exit 1
+  fi
+  
+  echo -e "${GREEN_COLOR}New version is ready. Starting update process...${RES}"
+  
+  # 3. Enter minimal downtime window
+  
+  # Record currently running service instances before stopping them
+  ACTIVE_SERVICES=()
+  if [ "$INIT_SYSTEM" = "systemd" ]; then
+    # Get the list of active instances and store them in an array
+    mapfile -t ACTIVE_SERVICES < <(systemctl list-units --type=service --state=active | grep "easytier@" | awk '{print $1}')
+    if [ ${#ACTIVE_SERVICES[@]} -gt 0 ]; then
+        echo -e "\r\n${YELLOW_COLOR}Found running services: ${ACTIVE_SERVICES[*]}${RES}"
+        echo -e "${YELLOW_COLOR}Stopping EasyTier services...${RES}"
+        systemctl stop "${ACTIVE_SERVICES[@]}"
+    else
+        echo -e "\r\n${YELLOW_COLOR}No running EasyTier services found. Nothing to stop.${RES}"
+    fi
+  else # openrc
+    # openrc script seems to handle a single service, so keep it simple
+    echo -e "\r\n${YELLOW_COLOR}Stopping EasyTier service...${RES}"
+    rc-service easytier stop
+  fi
+
+  # Backup critical files, primarily the configuration
+  echo "Backing up configuration..."
+  BACKUP_CONFIG_DIR=$(mktemp -d /tmp/easytier_config_backup_XXXXXX)
+  if [ -d "$INSTALL_PATH/config" ]; then
+      cp -a "$INSTALL_PATH/config" "$BACKUP_CONFIG_DIR/"
+  fi
+  
+  echo "Replacing files..."
+  # Remove old binaries and docs, but not the config directory
+  rm -f "$INSTALL_PATH/easytier-core" "$INSTALL_PATH/easytier-cli" "$INSTALL_PATH/LICENSE" "$INSTALL_PATH/README.md"
+  
+  # Move new files into the installation directory
+  mv "$TEMP_UPDATE_DIR/easytier-linux-${ARCH}"/* "$INSTALL_PATH/"
+  chmod +x "$INSTALL_PATH/easytier-core" "$INSTALL_PATH/easytier-cli"
+
+  # Restore configuration to prevent user-defined settings from being overwritten
+  if [ -d "$BACKUP_CONFIG_DIR/config" ]; then
+      cp -af "$BACKUP_CONFIG_DIR/config/." "$INSTALL_PATH/config/"
+  fi
+  
+  # 4. Start the services, restoring operation
+  if [ "$INIT_SYSTEM" = "systemd" ]; then
+    if [ ${#ACTIVE_SERVICES[@]} -gt 0 ]; then
+        echo -e "${GREEN_COLOR}Starting new version of EasyTier services: ${ACTIVE_SERVICES[*]}${RES}"
+        systemctl start "${ACTIVE_SERVICES[@]}"
+    else
+        echo -e "${GREEN_COLOR}No services were running before the update. Update complete.${RES}"
+    fi
+  else # openrc
+    echo -e "${GREEN_COLOR}Starting new version of EasyTier service...${RES}"
+    rc-service easytier start
+  fi
+  
+  # 5. Clean up temporary files
+  echo "Cleaning up temporary files..."
+  rm -rf "$TEMP_UPDATE_DIR"
+  rm -rf "$BACKUP_CONFIG_DIR"
+  
+  echo -e "\r\n${GREEN_COLOR}EasyTier was successfully updated to version $LATEST_VERSION!${RES}\r\n"
 }
 
+
 # CURL progress
 if curl --help | grep progress-bar >/dev/null 2>&1; then # $CURL_BAR
   CURL_BAR="--progress-bar"
@@ -461,4 +528,4 @@ else
   echo -e "\n\r${GREEN_COLOR} install, uninstall, update, help ${RES}"
 fi
 
-rm -rf /tmp/easytier_tmp_*
+rm -rf /tmp/easytier_tmp_*