计算机英语词库 第 8 级 · 阅读短文

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Our team had to move a small payments service to a new cluster last month.上个月，我们团队需要把一个小的支付服务迁到新集群。 We chose a blue-green setup, so traffic could switch back at any moment.我们选择了「蓝绿」方案，所以流量随时可以切回来。 On Monday we ran a canary release with only five percent of live traffic.周一我们做了一个「金丝雀发布」，只放百分之五的线上流量。 The first smoke test passed, and the health check of each pod looked fine.第一次「冒烟测试」通过了，每个 Pod 的「健康检查」看起来也正常。 A sidecar proxy also watched every request for slow replies.一个「边车」代理还盯着每个请求，看有没有慢响应。 The cutover itself took twenty minutes and caused no real downtime.「切换」本身花了二十分钟，没有造成真正的「停机」。

Two hours later, one node began to hit a strict rate limit on the database.两小时后，一个节点开始撞上数据库严格的「限流」。 We stopped the rollout and shipped a hotfix the same evening.我们停下发布，当晚就发了「热修复」。 Nobody had written a runbook for that case, so we worked from memory.当时没人写过那种情况的「运行手册」，我们只能凭记忆处理。 She wrote the missing runbook the next morning and added the sidecar alert as a permanent item.她第二天早上补写了缺的「运行手册」，并把边车告警加成了固定项。

The lesson was simple: a canary release buys time, but only a runbook keeps it calm.教训很简单：「金丝雀发布」争取时间，但只有「运行手册」能让时间保持从容。