.execute()

    response.use {
      assertEquals(200, response.code)
      assertEquals(Protocol.HTTP_2, response.protocol)
    }

    // Only logs to the test logger above
    // Will fail if "adb shell setprop log.tag.okhttp.Http2 DEBUG" is called
    assertEquals(setOf(OkHttpTest::class.java.name), testHandler.calls.keys)
  }

  fun testCachedRequest() {
    enableTls()

For example, to enable auto mTLS, use `istioctl manifest generate --set values.global.mtls.auto=true --set values.global.controlPlaneSecurityEnabled=true`

To override a setting that includes dots, escape them with a backslash (\).  Your shell may require enclosing quotes.

``` bash
istioctl manifest generate --set "values.sidecarInjectorWebhook.injectedAnnotations.container\.apparmor\.security\.beta\.kubernetes\.io/istio-proxy=runtime/default"
```

You can create and use environment variables in the shell, without needing Python:

=== "Linux, macOS, Windows Bash"

    <div class="termy">

    ```console
    // You could create an env var MY_NAME with
    $ export MY_NAME="Wade Wilson"

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#### Coding style for other languages

*   [Google Java Style Guide](https://google.github.io/styleguide/javaguide.html)
*   [Google JavaScript Style Guide](https://google.github.io/styleguide/jsguide.html)
*   [Google Shell Style Guide](https://google.github.io/styleguide/shellguide.html)
*   [Google Objective-C Style Guide](https://google.github.io/styleguide/objcguide.html)

#### Running sanity check

  // command  is root ('/') in the container's filesystem. The command is simply exec'd, it is
  // not run inside a shell, so traditional shell instructions ('|', etc) won't work. To use
  // a shell, you need to explicitly call out to that shell.
  // Exit status of 0 is treated as live/healthy and non-zero is unhealthy.
  // +optional
  repeated string command = 1;
}

这些设置中的大多数是可变的（可以更改的），比如数据库的 URL。而且许多设置可能是敏感的，比如密钥。

因此，通常会将它们提供为由应用程序读取的环境变量。

## 环境变量

!!! tip
    如果您已经知道什么是"环境变量"以及如何使用它们，请随意跳到下面的下一节。

环境变量（也称为"env var"）是一种存在于 Python 代码之外、存在于操作系统中的变量，可以被您的 Python 代码（或其他程序）读取。

您可以在 shell 中创建和使用环境变量，而无需使用 Python：

=== "Linux、macOS、Windows Bash"

    <div class="termy">

    ```console
    // 您可以创建一个名为 MY_NAME 的环境变量
    $ export MY_NAME="Wade Wilson"

    // 然后您可以与其他程序一起使用它，例如

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