Release v2.1.0

⭐ Feature

• Support Prometheus monitoring on the Sermant(beta). Issue #1445
  (1)Support collection of Sermant indicators.
  (2)Support providing API collection plugin indicators.
• Support rocketMq grayscale message. Issue #1539
• Support obtaining Istio routing and load balancing configurations based on the xDS protocol. Issue #1604
  (1)Support obtaining the routing and load balancing configuration of the Istio control plane based on the xDS protocol.
  (2)Support routing using xDS routing rule configuration.
• Supports hot plugging services on the Backend. Issue #1606
  (1)Support dynamic installation, uninstallation and update of plugins through Sermant Backend.
  (2)Support viewing hot plugging events of specified instances in Sermant Backend.

📈 Improvements

• Optimize configuration management services. Issue #1622
  (1)Supports rendering of configuration management page and configuration details page through plugin ui template.
• Upgrading open-source software versions. Issue #1637

🐞 Fixes

• Fix the issue of Nacos dynamic configuration. Issue #1584
• Fix the issue of failed parsing of Sermant empty collection configuration. Issue #1591
• Fix the issue of the service loading order is inconsistent with the SPI file definition order. Issue #1602
• Fix the issue of using the wrong time unit when the backend uses Redis to store heartbeats. Issue #1610
• Fix the issue of OutOfMemoryError when Backend uses Nacos as the configuration center。Issue #1613
• Fix the issue of backend sending webhook error when using redis to store events. Issue #1616
• Fix the issue of the consumer may send requests to the wrong instance in the graceful shutdown plugin. Issue #1589