raft模式客户端使用域名时，发生访问端口错误 #6551
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raft模式客户端使用域名时，发生访问端口错误 #6551
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…要优先使用域名，否则仍会出现匹配问题。建议后续修改METADATA的数据结构，保存DNS解析结果，避免在queryHttpAddress中重复解析node地址。
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已在queryHttpAddress方法中解析了node，统一使用IP，无论使用IP还是域名都可以正确运行 |
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Ⅰ. Describe what this PR did
raft模式，客户端watch集群时，会使用解析后的IP地址查询raft节点。
如果客户端配置中使用域名，则无法用IP找到节点，导致获取http端口号错误。
这里修改为使用域名。
修改后，如果环境中存在DNS（如在k8s等环境中），需要优先使用域名，否则仍会出现匹配问题。
建议后续修改METADATA的数据结构，保存DNS解析结果，避免在queryHttpAddress中重复解析node地址。
Ⅱ. Does this pull request fix one issue?
fixes #6532
Ⅲ. Why don't you add test cases (unit test/integration test)?
修改内容较少，如果环境中不存在DNS，不造成任何影响
Ⅳ. Describe how to verify it
在k8s环境中直接使用集群内部域名时，个人已验证
Ⅴ. Special notes for reviews
由于METADATA中只记录了原始节点信息，不区分域名或IP，所以无法确保比较结果。
如果直接在queryHttpAddress解析原始节点信息会造成不必要的网络压力和性能损失。
要彻底修复该问题，建议修改METADATA中的节点信息，解析并保存DNS解析结果，避免在queryHttpAddress中重复解析。