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  • 【k8s】livenessProbe-periodSeconds

    环境

    1. kubernetes 1.20.4
    2. Spring Boot 2.5.0-M3

    目标

    periodSeconds 表示探针的探测周期,默认情况下是 10 秒。
    下面演示将周期修改成 5 秒。

    示例

    Pod.yaml

    apiVersion: v1
    kind: Pod
    metadata:
      name: spring-k8s
    spec:
      containers:
        - name: spring-k8s
          image: jiangbo920827/spring-k8s:trace
          livenessProbe:
            httpGet:
              path: /actuator/health/liveness
              port: http
            periodSeconds: 5
          ports:
            - name: http
              containerPort: 8080
    

    查看

    
    2021-03-25 16:17:56.209 TRACE 1 --- [nio-8080-exec-2] s.w.s.m.m.a.RequestMappingHandlerAdapter : Applying default cacheSeconds=-1
    2021-03-25 16:17:56.210 TRACE 1 --- [nio-8080-exec-2] o.s.web.servlet.DispatcherServlet        : No view rendering, null ModelAndView returned.
    2021-03-25 16:17:56.210 DEBUG 1 --- [nio-8080-exec-2] o.s.web.servlet.DispatcherServlet        : Completed 200 OK, headers={masked}
    2021-03-25 16:18:01.199 TRACE 1 --- [nio-8080-exec-5] o.s.web.servlet.DispatcherServlet        : GET "/actuator/health/liveness", parameters={}, headers={masked} in DispatcherServlet 'dispatcherServlet'
    2021-03-25 16:18:01.199 TRACE 1 --- [nio-8080-exec-5] s.b.a.e.w.s.WebMvcEndpointHandlerMapping : Mapped to Actuator web endpoint 'health-path'
    2021-03-25 16:18:01.200 TRACE 1 --- [nio-8080-exec-5] o.s.web.method.HandlerMethod             : Arguments: [org.apache.catalina.connector.RequestFacade@29d96d2f, null]
    2021-03-25 16:18:01.200 DEBUG 1 --- [nio-8080-exec-5] o.s.w.s.m.m.a.HttpEntityMethodProcessor  : Using 'application/vnd.spring-boot.actuator.v3+json', given [*/*] and supported [application/vnd.spring-boot.actuator.v3+json, application/vnd.spring-boot.actuator.v2+json, application/json]
    2021-03-25 16:18:01.200 TRACE 1 --- [nio-8080-exec-5] o.s.w.s.m.m.a.HttpEntityMethodProcessor  : Writing [org.springframework.boot.actuate.health.CompositeHealth@7294e8dd]
    2021-03-25 16:18:01.208 TRACE 1 --- [nio-8080-exec-5] s.w.s.m.m.a.RequestMappingHandlerAdapter : Applying default cacheSeconds=-1
    2021-03-25 16:18:01.209 TRACE 1 --- [nio-8080-exec-5] o.s.web.servlet.DispatcherServlet        : No view rendering, null ModelAndView returned.
    2021-03-25 16:18:01.209 DEBUG 1 --- [nio-8080-exec-5] o.s.web.servlet.DispatcherServlet        : Completed 200 OK, headers={masked}
    

    可以看到每过 5 秒,就收到了存活探针的请求。

    总结

    通过定义 periodSeconds 来设置探针的探测间隔。

    附录

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  • 原文地址:https://www.cnblogs.com/jiangbo44/p/14584710.html
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