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GCP 负载均衡器健康检查频率非常高

tag-icon • tag-icon load-balancing google-cloud-platform healthcheck
GCP 负载均衡器健康检查频率非常高

我在 GCP 上使用 HTTP 负载均衡器，通过 Kubernetes 配置入口。

看起来健康检查请求的次数非常频繁：

10.0.4.1 - - [24/Apr/2018:17:53:25 +0000] "GET / HTTP/1.1" 200 695 "-" "GoogleHC/1.0"
10.128.0.5 - - [24/Apr/2018:17:53:25 +0000] "GET / HTTP/1.1" 200 695 "-" "GoogleHC/1.0"
10.128.0.7 - - [24/Apr/2018:17:53:25 +0000] "GET / HTTP/1.1" 200 695 "-" "GoogleHC/1.0"
10.128.0.5 - - [24/Apr/2018:17:53:25 +0000] "GET / HTTP/1.1" 200 695 "-" "GoogleHC/1.0"
10.128.0.7 - - [24/Apr/2018:17:53:25 +0000] "GET / HTTP/1.1" 200 695 "-" "GoogleHC/1.0"
10.0.4.1 - - [24/Apr/2018:17:53:25 +0000] "GET / HTTP/1.1" 200 695 "-" "GoogleHC/1.0"
10.128.0.5 - - [24/Apr/2018:17:53:26 +0000] "GET / HTTP/1.1" 200 695 "-" "GoogleHC/1.0"
10.0.4.1 - - [24/Apr/2018:17:53:26 +0000] "GET / HTTP/1.1" 200 695 "-" "GoogleHC/1.0"
10.128.0.7 - - [24/Apr/2018:17:53:26 +0000] "GET / HTTP/1.1" 200 695 "-" "GoogleHC/1.0"
10.128.0.5 - - [24/Apr/2018:17:53:26 +0000] "GET / HTTP/1.1" 200 695 "-" "GoogleHC/1.0"
10.128.0.5 - - [24/Apr/2018:17:53:26 +0000] "GET / HTTP/1.1" 200 695 "-" "GoogleHC/1.0"
10.128.0.7 - - [24/Apr/2018:17:53:27 +0000] "GET / HTTP/1.1" 200 695 "-" "GoogleHC/1.0"
10.128.0.5 - - [24/Apr/2018:17:53:27 +0000] "GET / HTTP/1.1" 200 695 "-" "GoogleHC/1.0"

这是正常/预期的吗？如您所见，我用200s 进行响应。我还检查了配置，轮询间隔应该是 60 秒：

nathan@test-k8s-201417:~$ gcloud compute health-checks describe health-check-id
checkIntervalSec: 60

我的预期是每六十秒进行一次健康检查，但我看到的却是每秒一百次！

答案1

这实际上是一种预期的行为，因为 Google 探测器实际上发送的请求比您的健康检查间隔要多。

但是，根据您设置的间隔以及是否收到“200”条消息，您的后端健康检查将被标记为健康或不健康。以下是一些官方文档这解释了这种行为。

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