Spring Cloud基于CPU使用率进行限流

冷不防 2021-07-24 16:59 439阅读 0赞

**一 代码位置**

[https://github.com/cakin24/spring-cloud-code/tree/master/ch18-6/ch18-6-3-gateway][https_github.com_cakin24_spring-cloud-code_tree_master_ch18-6_ch18-6-3-gateway]

[https://github.com/cakin24/spring-cloud-code/tree/master/ch18-6/ch18-6-provider][https_github.com_cakin24_spring-cloud-code_tree_master_ch18-6_ch18-6-provider]

**二 测试**

1 启动[ch18-6-3-gateway][https_github.com_cakin24_spring-cloud-code_tree_master_ch18-6_ch18-6-3-gateway]

2 启动[ch18-6-provider][https_github.com_cakin24_spring-cloud-code_tree_master_ch18-6_ch18-6-provider]

3 使用postman访问  [http://localhost:8082/actuator/metrics/system.cpu.usage][http_localhost_8082_actuator_metrics_system.cpu.usage]

{
        "name": "system.cpu.usage",
        "measurements": [
            {
                "statistic": "VALUE",
                "value": 0.44747169244250673
            }
        ],
        "availableTags": []
    }

4 浏览器不停的访问：[http://localhost:8082/test/rateLimit][http_localhost_8082_test_rateLimit]

都能得到正常的结果：

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2NoZW5ncWl1bWluZw_size_16_color_FFFFFF_t_70][]

5 修改CPU限流值为

private static final double MAX_USAGE = 0.10D;

6 重启[ch18-6-3-gateway][https_github.com_cakin24_spring-cloud-code_tree_master_ch18-6_ch18-6-3-gateway]

7 浏览器不停访问：[http://localhost:8082/test/rateLimit][http_localhost_8082_test_rateLimit]

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2NoZW5ncWl1bWluZw_size_16_color_FFFFFF_t_70 1][]

限流成功！

[https_github.com_cakin24_spring-cloud-code_tree_master_ch18-6_ch18-6-3-gateway]: https://github.com/cakin24/spring-cloud-code/tree/master/ch18-6/ch18-6-1-gateway
[https_github.com_cakin24_spring-cloud-code_tree_master_ch18-6_ch18-6-provider]: https://github.com/cakin24/spring-cloud-code/tree/master/ch18-6/ch18-6-provider
[http_localhost_8082_actuator_metrics_system.cpu.usage]: http://localhost:8082/actuator/metrics/system.cpu.usage
[http_localhost_8082_test_rateLimit]: http://localhost:8081/test/rateLimit
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2NoZW5ncWl1bWluZw_size_16_color_FFFFFF_t_70]: /images/20210724/056fc1ce829b46f894275fe48c753ac6.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2NoZW5ncWl1bWluZw_size_16_color_FFFFFF_t_70 1]: /images/20210724/f1132fc2b3664c83b5fbed3c716335fe.png