Jason Song

client 实际生效的配置会按照优先级查找多个集群，在订阅的时候不感知具体哪个集群有配置，所以都会订阅 

* apollo 支持 mysql 8 * 从两边同时写入intance表会报instance.IX_UNIQUE_KEY 冲突，这个是两天数据重复了吧 * UNIQUE KEY `IX_UNIQUE_KEY` (`AppId`,`ClusterName`,`Ip`,`DataCenter`)

一个环境用一套数据库即可，如果是高可用考虑可以是主备

You may add breakpoints to the lines that reference `beanName2SpringValueDefinitions` and debug `com.ctrip.framework.apollo.spring.XmlConfigPlaceholderTest` and `com.ctrip.framework.apollo.spring.JavaConfigPlaceholderTest`.

Simply run any of the test should trigger the breakpoints.

I think you could export the apollo users from `ApolloPortalDB.Users` and import them into OIDC. The password might be an issue but I suppose the OIDC system should have some...

看这个页面是自定义的，不过大体原则应该是这样的 - `如果是灰度发布事件，影响到的ip就是灰度规则里面的值，其他都是全量的实例节点`。

@zhangjundong1992 you may reference the upgrade steps in release note page - https://github.com/apolloconfig/apollo/releases/tag/v2.0.0

btw, apollo has [prometheus support](https://www.apolloconfig.com/#/zh/design/apollo-design?id=_52-metrics), hope it helps.

I think it's related to the user session instead of the config item, please refer https://www.apolloconfig.com/#/zh/development/portal-how-to-enable-session-store to enable session sharing.