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      <title>Playbook：AWS MSK Serverless 迁回 Provisioned——什么时候、为什么、怎么迁</title>
      <link>https://socake.github.io/playbook/msk-serverless-to-provisioned/</link>
      <pubDate>Thu, 30 Apr 2026 13:30:00 +0800</pubDate>
      <author>17691281867@163.com (Wenzhuo Huang)</author>
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      <description>MSK Serverless 看似按用量付费，实际上有一个常被忽视的最低消费层级：每个集群每月固定 $540 起、每个活跃消费者 IAM principal 还要按小时另收。对于流量长期 &amp;laquo; 1MB/s 的非生产环境，月费可以是同等吞吐 Provisioned 集群的 5-7 倍。本文记录将 4 个非生产环境从 MSK Serverless 迁回 Provisioned（kafka.t3.small × 2）的完整流程：成本计算脚本、aws kafka create-cluster 完整 JSON、IRSA 三 role 拆分、Java/Go/Python 三栈客户端配置、双集群双写五阶段切换、Schema Registry 导出导入、回滚脚本，以及踩过的多 IRSA、sarama、broker 数不可缩、Schema Registry 漏迁五个坑。</description>
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