v3.1.1-rc1

Features

• Wrapper sliding window with custom aggregator
• Wrapper sliding window with custom counter for caculating QPS
• Add some metrics
• Add registry metrics
• Add metadata rt metrics
• Add medata and config center metrics
• Introduce metrics bus
• Add metrics base api interface
• Implement meta cache
• Add prometheus pushgateway support
• Add switch for metric collector
• Add rpc exception metrics

BugFixes

• Cache manager test
• Fix an issue that random ports can't be assgined
• Fix variable name typo
• Fix registry primitiveURL
• Fix health.proto has name conflict with the one in google.golang.org/grpc
• Rename 'one' to 'cacheOnce'
• Fix config random port
• Fix ConsumerConfig nil pointer problem
• Limit header size to avoid unexpected OOM
• Fix zookeeper and nacos issues working as registry, metadata and configcenter
• Fix service discovery subscription

Enhancements

• Make rt metric more performance and easy to use
• Migrate old RT metric impl to new RT impl
• Nacos support subscribe to all with '*'
• Optimize the integration of otel tracing
• Add fmt make task
• Rewrite RPC metrics into the event pattern
• Change metric config to url like other module
• Simplify configuration when enable metrics
• Remove redundant nil check in Init
• Improve cache init time and add application name
• Zk registry support customize 'rootPath'
• Refactor metrics config
• Improve tag and configurator rules to keep up with official site