使用环境变量设置 Hystrix 超时 [英] Setting Hystrix timeout with environment variable
问题描述
为了改变 Hystrix 的默认请求超时(1000ms)，必须设置以下属性:hystrix.command.default.execution.isolation.thread.timeoutInMilliseconds=2000
In order to change Hystrix's default request timeout (1000ms), one must set the following property :
hystrix.command.default.execution.isolation.thread.timeoutInMilliseconds=2000
对应的环境变量是什么?
What is the corresponding environment variable ?
我想在不接触源代码的情况下在我最喜欢的云平台上调整"超时.我很确定这个不起作用:HYSTRIX_COMMAND_DEFAULT_EXECUTION_ISOLATION_THREAD_TIMEOUT_IN_MILLISECONDS=2000
I would like to "tune" the timeout on my favorite cloud platform without touching the source code first.
I'm pretty sure this one doesn't work : HYSTRIX_COMMAND_DEFAULT_EXECUTION_ISOLATION_THREAD_TIMEOUT_IN_MILLISECONDS=2000
在 Spring Cloud Camden/Spring Boot 1.4 中发现问题.
EDIT : Problem was found with Spring Cloud Camden / Spring Boot 1.4.
推荐答案
可以从应用程序配置中引用 VM 选项和环境变量，这通常是设置具有较长名称的属性的更方便的方法.
VM options and environment variables can be referenced from application configuration, which is often a more convenient way to set properties with longer names.
例如，可以在application.yml中定义如下引用:
For example, one can define the following reference in application.yml:
hystrix.command.default.execution.isolation.thread.timeoutInMilliseconds: ${service.timeout}
这将通过 VM 选项 -Dservice.timeout=10000 解决，将默认的 Hystrix 命令超时设置为 10 秒.使用环境变量甚至更简单 - 感谢 relaxed binding，其中任何一个都可以工作(export 示例适用于 Linux):
which will be resolved from the VM option -Dservice.timeout=10000, setting the default Hystrix command timeout to 10 seconds. It is even simpler with environment variables - thanks to relaxed binding, any of these will work (export examples are for Linux):
导出 service.timeout=10000导出 service_timeout=10000导出SERVICE.TIMEOUT=10000导出SERVICE_TIMEOUT=10000
常见的方法是使用 lowercase.dot.separated 作为 VM 参数，使用 ALL_CAPS_WITH_UNDERSCORES 作为环境变量.
The common approach is to use lowercase.dot.separated for VM arguments and ALL_CAPS_WITH_UNDERSCORES for environment variables.
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