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feat(dist): add kong note of gateway
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[toc] | ||
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## upstream(上有服务) | ||
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1. 将流量转发到的多个 target 的集合, target 可以是域名/ip+port | ||
2. 功能 | ||
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- **负载均衡**: `基于 DNS 的负载均衡` || `Ring-balancer(环形均衡器)` | ||
- 健康检查: 主动检查 || 被动检查, 将流量转发至其它健康的 target | ||
- 熔断: 根据健康检查的状态, 对客户端请求进行熔断, 防止后端级联服务雪崩 | ||
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## 负载均衡: [hash 一致性算法](https://mp.weixin.qq.com/s/76R-JD5zWzixrBQb6WYjXQ) | ||
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1. 轮询、加权轮询、随机选择 | ||
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### DNS 负载均衡 | ||
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### 环形均衡器: Ring-balancer | ||
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## 健康检查 | ||
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1. 主动检查 | ||
2. 被动检查 | ||
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## target | ||
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--- | ||
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## reference | ||
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1. https://www.jianshu.com/p/b44400618c69 |
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[3.upstream link](./3.upstream.md) |
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[toc] | ||
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## plugins(kong/openresty/nginx 的精魂所在) | ||
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1. Kong 开源版本提供 8 个类型 共 28 个插件 | ||
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- **身份认证类**: 只有认证后才能使用 consumer 概念 | ||
- 安全防护类 | ||
- **流量控制类** | ||
- 云平台插件类 | ||
- 分析监控类 | ||
- 转换请求类型类 | ||
- **日志记录类** | ||
- 其他插件类 | ||
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2. 常见的插件应用 | ||
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- Ip restriction: 黑白名单 | ||
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1. 可以配置一个区段, 也可以是特定的 IP 地址 | ||
2. 可以针对所有的消费方, 也可以是特定的某个消费方 | ||
3. 可以针对所有的 API, 也可以针对特定的 API 接口 | ||
4. 黑白名单能同时配置并生效(docker 内可能会是 172.22.0.1) | ||
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- Oauth2: 需要 api 本身就是 https 且设置 only_https=true | ||
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1. Authorization code: 授权码模式 | ||
2. Implicit Grant: 隐式模式 | ||
3. Resource Owner Password Credentials: 密码模式 | ||
4. Client Credentials: 客户端模式 | ||
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- **Jwt** | ||
- Rate limiting: 限流请求 | ||
- request termination | ||
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1. 使用指定的状态代码和消息终止传入请求 | ||
2. 允许暂时阻止 API 或 Consumer, 但不能触发阈值自动熔断: 实际意义不大 | ||
3. 可用于发版部署的时候率先熔断服务 | ||
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- File-log | ||
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1. 将请求和响应数据附加到磁盘上的日志文件 | ||
2. 指定路径为文件全路径不是目录路径 | ||
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- http-log: 将请求和响应日志发送到 HTTP 服务器 | ||
- Prometheus: 监控, 公开与 Kong 和代理上游服务相关的指标 | ||
- Canary: 灰度发布 | ||
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--- | ||
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## reference | ||
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1. https://docs.konghq.com/hub/ |
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[toc] | ||
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## intros | ||
## intros/overview | ||
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![avatar](/static/image/dist/gateway/kong-flow.png) | ||
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## deploy | ||
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