docs: sync English doc to Chinese (#3796)

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---
title: 架构设计
---
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## 目录
- [目录](#目录)
- [APISIX](#apisix)
- [插件加载流程](#插件加载流程)
- [插件内部结构](#插件内部结构)
- [APISIX Config](#apisix-config)
- [Route](#route)
- [Service](#service)
- [Plugin](#plugin)
- [Script](#script)
- [Upstream](#upstream)
- [配置参数](#配置参数)
- [Consumer](#consumer)
- [Cookie](#cookie)
- [Header](#header)
- [Router](#router)
- [Consumer](#consumer-1)
- [Global Rule](#global-rule)
- [Plugin Config](#plugin-config)
- [Debug mode](#debug-mode)
- [基本调试模式](#基本调试模式)
- [高级调试模式](#高级调试模式)
## APISIX
### 插件加载流程
![插件加载流程](../../assets/images/flow-load-plugin.png)
### 插件内部结构
![插件内部结构](../../assets/images/flow-plugin-internal.png)
## APISIX Config
通过修改本地 `conf/config.yaml` 文件,或者在启动 APISIX 时使用 `-c``--config` 添加文件路径参数 `apisix start -c <path string>`,完成对 APISIX 服务本身的基本配置。
比如修改 APISIX 默认监听端口为 8000其他配置保持默认`config.yaml` 中只需这样配置:
```yaml
apisix:
node_listen: 8000 # APISIX listening port
```
比如指定 APISIX 默认监听端口为 8000并且设置 etcd 地址为 `http://foo:2379`
其他配置保持默认。在 `config.yaml` 中只需这样配置:
```yaml
apisix:
node_listen: 8000 # APISIX listening port
etcd:
host: "http://foo:2379" # etcd address
```
其他默认配置,可以在 `conf/config-default.yaml` 文件中看到,该文件是与 APISIX 源码强绑定,
**永远不要**手工修改 `conf/config-default.yaml` 文件。如果需要自定义任何配置,都应在 `config.yaml` 文件中完成。
_注意_ 不要手工修改 APISIX 自身的 `conf/nginx.conf` 文件,当服务每次启动时,`apisix`
会根据 `config.yaml` 配置自动生成新的 `conf/nginx.conf` 并自动启动服务。
[返回目录](#目录)
## Route
Route 字面意思就是路由,通过定义一些规则来匹配客户端的请求,然后根据匹配结果加载并执行相应的
插件,并把请求转发给到指定 Upstream。
Route 中主要包含三部分内容:匹配规则(比如 uri、host、remote_addr 等),插件配置(限流限速等)和上游信息。
请看下图示例,是一些 Route 规则的实例,当某些属性值相同时,图中用相同颜色标识。
![路由示例](../../assets/images/routes-example.png)
我们直接在 Route 中完成所有参数的配置,优点是容易设置,每个 Route 都相对独立自由度比较高。但当我们的 Route 有比较多的重复配置(比如启用相同的插件配置或上游信息),一旦我们要更新这些相同属性时,就需要遍历所有 Route 并进行修改,给后期管理维护增加不少复杂度。
上面提及重复的缺点在 APISIX 中独立抽象了 [Service](#service) 和 [Upstream](#upstream) 两个概念来解决。
下面创建的 Route 示例,是把 URL 为 "/index.html" 的请求代理到地址为 "39.97.63.215:80" 的 Upstream 服务:
```shell
$ curl http://127.0.0.1:9080/apisix/admin/routes/1 -H 'X-API-KEY: edd1c9f034335f136f87ad84b625c8f1' -X PUT -i -d '
{
"uri": "/index.html",
"upstream": {
"type": "roundrobin",
"nodes": {
"39.97.63.215:80": 1
}
}
}'
HTTP/1.1 201 Created
Date: Sat, 31 Aug 2019 01:17:15 GMT
Content-Type: text/plain
Transfer-Encoding: chunked
Connection: keep-alive
Server: APISIX web server
{"node":{"value":{"uri":"\/index.html","upstream":{"nodes":{"39.97.63.215:80":1},"type":"roundrobin"}},"createdIndex":61925,"key":"\/apisix\/routes\/1","modifiedIndex":61925},"action":"create"}
```
当我们接收到成功应答,表示该 Route 已成功创建。
有关 Route 的具体选项,可具体查阅 [Admin API 之 Route](admin-api.md#route)。
[返回目录](#目录)
## Service
`Service` 是某类 API 的抽象(也可以理解为一组 Route 的抽象)。它通常与上游服务抽象是一一对应的,`Route`
`Service` 之间,通常是 N:1 的关系,参看下图。
![服务示例](../../assets/images/service-example.png)
不同 Route 规则同时绑定到一个 Service 上,这些 Route 将具有相同的上游和插件配置,减少冗余配置。
比如下面的例子,创建了一个启用限流插件的 Service然后把 id 为 `100`、`101` 的 Route 都绑定在这个 Service 上。
```shell
# create new Service
$ curl http://127.0.0.1:9080/apisix/admin/services/200 -H 'X-API-KEY: edd1c9f034335f136f87ad84b625c8f1' -X PUT -d '
{
"plugins": {
"limit-count": {
"count": 2,
"time_window": 60,
"rejected_code": 503,
"key": "remote_addr"
}
},
"upstream": {
"type": "roundrobin",
"nodes": {
"39.97.63.215:80": 1
}
}
}'
# create new Route and reference the service by id `200`
curl http://127.0.0.1:9080/apisix/admin/routes/100 -H 'X-API-KEY: edd1c9f034335f136f87ad84b625c8f1' -X PUT -d '
{
"methods": ["GET"],
"uri": "/index.html",
"service_id": "200"
}'
curl http://127.0.0.1:9080/apisix/admin/routes/101 -H 'X-API-KEY: edd1c9f034335f136f87ad84b625c8f1' -X PUT -d '
{
"methods": ["GET"],
"uri": "/foo/index.html",
"service_id": "200"
}'
```
当然我们也可以为 Route 指定不同的插件参数或上游,比如下面这个 Route 设置了不同的限流参数,其他部分(比如上游)则继续使用 Service 中的配置参数。
```shell
curl http://127.0.0.1:9080/apisix/admin/routes/102 -H 'X-API-KEY: edd1c9f034335f136f87ad84b625c8f1' -X PUT -d '
{
"uri": "/bar/index.html",
"id": "102",
"service_id": "200",
"plugins": {
"limit-count": {
"count": 2000,
"time_window": 60,
"rejected_code": 503,
"key": "remote_addr"
}
}
}'
```
注意:当 Route 和 Service 都开启同一个插件时Route 参数的优先级是高于 Service 的。
[返回目录](#目录)
## Plugin
`Plugin` 表示将在 `HTTP` 请求/响应生命周期期间执行的插件配置。
`Plugin` 配置可直接绑定在 `Route` 上,也可以被绑定在 `Service``Consumer`上。而对于同一
个插件的配置,只能有一份是有效的,配置选择优先级总是 `Consumer` > `Route` > `Service`
`conf/config.yaml` 中,可以声明本地 APISIX 节点都支持哪些插件。这是个白名单机制,不在该
白名单的插件配置,都将会被自动忽略。这个特性可用于临时关闭或打开特定插件,应对突发情况非常有效。
如果你想在现有插件的基础上新增插件,注意需要拷贝 `conf/config-default.yaml` 的插件节点内容到 `conf/config.yaml` 的插件节点中。
插件的配置可以被直接绑定在指定 Route 中,也可以被绑定在 Service 中,不过 Route 中的插件配置
优先级更高。
一个插件在一次请求中只会执行一次,即使被同时绑定到多个不同对象中(比如 Route 或 Service
插件运行先后顺序是根据插件自身的优先级来决定的,例如:
```lua
local _M = {
version = 0.1,
priority = 0, -- 这个插件的优先级为 0
name = plugin_name,
schema = schema,
metadata_schema = metadata_schema,
}
```
插件配置作为 Route 或 Service 的一部分提交的,放到 `plugins` 下。它内部是使用插件
名字作为哈希的 key 来保存不同插件的配置项。
```json
{
...
"plugins": {
"limit-count": {
"count": 2,
"time_window": 60,
"rejected_code": 503,
"key": "remote_addr"
},
"prometheus": {}
}
}
```
并不是所有插件都有具体配置项,比如 `prometheus` 下是没有任何具体配置项,这时候用一个空的对象
标识即可。
如果一个请求因为某个插件而被拒绝,会有类似这样的 warn 日志:`ip-restriction exits with http status code 403`。
[查看 APISIX 已支持插件列表](plugins.md)
[返回目录](#目录)
## Script
`Script` 表示将在 `HTTP` 请求/响应生命周期期间执行的脚本。
`Script` 配置可直接绑定在 `Route` 上。
`Script``Plugin` 互斥,且优先执行 `Script` ,这意味着配置 `Script` 后,`Route` 上配置的 `Plugin` 将不被执行。
理论上,在 `Script` 中可以写任意 lua 代码,也可以直接调用已有插件以重用已有的代码。
`Script` 也有执行阶段概念,支持 `access`、`header_filter`、`body_filter` 和 `log` 阶段。系统会在相应阶段中自动执行 `Script` 脚本中对应阶段的代码。
```json
{
...
"script": "local _M = {} \n function _M.access(api_ctx) \n ngx.log(ngx.INFO,\"hit access phase\") \n end \nreturn _M"
}
```
[返回目录](#目录)
## Upstream
Upstream 是虚拟主机抽象对给定的多个服务节点按照配置规则进行负载均衡。Upstream 的地址信息可以直接配置到 `Route`(或 `Service`) 上,当 Upstream 有重复时,就需要用“引用”方式避免重复了。
![Upstream 示例](../../assets/images/upstream-example.png)
如上图所示,通过创建 Upstream 对象,在 `Route` 用 ID 方式引用,就可以确保只维护一个对象的值了。
Upstream 的配置可以被直接绑定在指定 `Route` 中,也可以被绑定在 `Service` 中,不过 `Route` 中的配置
优先级更高。这里的优先级行为与 `Plugin` 非常相似
### 配置参数
APISIX 的 Upstream 除了基本的复杂均衡算法选择外,还支持对上游做主被动健康检查、重试等逻辑,具体看下面的链接。
https://github.com/apache/apisix/blob/master/docs/zh/latest/admin-api.md#upstream
创建上游对象用例:
```json
curl http://127.0.0.1:9080/apisix/admin/upstreams/1 -H 'X-API-KEY: edd1c9f034335f136f87ad84b625c8f1' -X PUT -d '
{
"type": "chash",
"key": "remote_addr",
"nodes": {
"127.0.0.1:80": 1,
"foo.com:80": 2
}
}'
```
上游对象创建后,均可以被具体 `Route``Service` 引用,例如:
```shell
curl http://127.0.0.1:9080/apisix/admin/routes/1 -H 'X-API-KEY: edd1c9f034335f136f87ad84b625c8f1' -X PUT -d '
{
"uri": "/index.html",
"upstream_id": 2
}'
```
为了方便使用,也可以直接把上游地址直接绑到某个 `Route``Service` ,例如:
```shell
curl http://127.0.0.1:9080/apisix/admin/routes/1 -H 'X-API-KEY: edd1c9f034335f136f87ad84b625c8f1' -X PUT -d '
{
"uri": "/index.html",
"plugins": {
"limit-count": {
"count": 2,
"time_window": 60,
"rejected_code": 503,
"key": "remote_addr"
}
},
"upstream": {
"type": "roundrobin",
"nodes": {
"39.97.63.215:80": 1
}
}
}'
```
下面是一个配置了健康检查的示例:
```shell
curl http://127.0.0.1:9080/apisix/admin/routes/1 -H 'X-API-KEY: edd1c9f034335f136f87ad84b625c8f1' -X PUT -d '
{
"uri": "/index.html",
"plugins": {
"limit-count": {
"count": 2,
"time_window": 60,
"rejected_code": 503,
"key": "remote_addr"
}
},
"upstream": {
"nodes": {
"39.97.63.215:80": 1
}
"type": "roundrobin",
"retries": 2,
"checks": {
"active": {
"http_path": "/status",
"host": "foo.com",
"healthy": {
"interval": 2,
"successes": 1
},
"unhealthy": {
"interval": 1,
"http_failures": 2
}
}
}
}
}'
```
更多细节可以参考[健康检查的文档](./health-check.md)。
下面是几个使用不同`hash_on`类型的配置示例:
#### Consumer
创建一个 consumer 对象:
```shell
curl http://127.0.0.1:9080/apisix/admin/consumers -H 'X-API-KEY: edd1c9f034335f136f87ad84b625c8f1' -X PUT -d '
{
"username": "jack",
"plugins": {
"key-auth": {
"key": "auth-jack"
}
}
}'
```
新建路由,打开`key-auth`插件认证,`upstream`的`hash_on`类型为`consumer`
```shell
curl http://127.0.0.1:9080/apisix/admin/routes/1 -H 'X-API-KEY: edd1c9f034335f136f87ad84b625c8f1' -X PUT -d '
{
"plugins": {
"key-auth": {}
},
"upstream": {
"nodes": {
"127.0.0.1:1980": 1,
"127.0.0.1:1981": 1
},
"type": "chash",
"hash_on": "consumer"
},
"uri": "/server_port"
}'
```
测试请求,认证通过后的`consumer_name`将作为负载均衡哈希算法的哈希值:
```shell
curl http://127.0.0.1:9080/server_port -H "apikey: auth-jack"
```
##### Cookie
新建路由和`Upstream``hash_on`类型为`cookie`
```shell
curl http://127.0.0.1:9080/apisix/admin/routes/1 -H 'X-API-KEY: edd1c9f034335f136f87ad84b625c8f1' -X PUT -d '
{
"uri": "/hash_on_cookie",
"upstream": {
"key": "sid",
"type ": "chash",
"hash_on ": "cookie",
"nodes ": {
"127.0.0.1:1980": 1,
"127.0.0.1:1981": 1
}
}
}'
```
客户端请求携带`Cookie`
```shell
curl http://127.0.0.1:9080/hash_on_cookie -H 'X-API-KEY: edd1c9f034335f136f87ad84b625c8f1' -H "Cookie: sid=3c183a30cffcda1408daf1c61d47b274"
```
##### Header
新建路由和`Upstream``hash_on`类型为`header` `key`为`content-type`
```shell
curl http://127.0.0.1:9080/apisix/admin/routes/1 -H 'X-API-KEY: edd1c9f034335f136f87ad84b625c8f1' -X PUT -d '
{
"uri": "/hash_on_header",
"upstream": {
"key": "content-type",
"type ": "chash",
"hash_on ": "header",
"nodes ": {
"127.0.0.1:1980": 1,
"127.0.0.1:1981": 1
}
}
}'
```
客户端请求携带`content-type`的`header`
```shell
curl http://127.0.0.1:9080/hash_on_header -H 'X-API-KEY: edd1c9f034335f136f87ad84b625c8f1' -H "Content-Type: application/json"
```
[返回目录](#目录)
## Router
APISIX 区别于其他 API 网关的一大特点是允许用户选择不同 Router 来更好匹配自由业务,在性能、自由之间做最适合选择。
在本地配置 `conf/config.yaml` 中设置最符合自身业务需求的路由。
- `apisix.router.http`: HTTP 请求路由。
- `radixtree_uri`: (默认)只使用 `uri` 作为主索引。基于 `radixtree` 引擎,支持全量和深前缀匹配,更多见 [如何使用 router-radixtree](../../en/latest/router-radixtree.md)。
- `绝对匹配`:完整匹配给定的 `uri` ,比如 `/foo/bar``/foo/glo`。
- `前缀匹配`:末尾使用 `*` 代表给定的 `uri` 是前缀匹配。比如 `/foo*`,则允许匹配 `/foo/`、`/foo/a`和`/foo/b`等。
- `匹配优先级`:优先尝试绝对匹配,若无法命中绝对匹配,再尝试前缀匹配。
- `任意过滤属性`:允许指定任何 Nginx 内置变量作为过滤条件,比如 URL 请求参数、请求头、cookie 等。
- `radixtree_uri_with_parameter`: 同 `radixtree_uri` 但额外有参数匹配的功能。
- `radixtree_host_uri`: 使用 `host + uri` 作为主索引(基于 `radixtree` 引擎),对当前请求会同时匹配 host 和 uri支持的匹配条件与 `radixtree_uri` 基本一致。
- `apisix.router.ssl`: SSL 加载匹配路由。
- `radixtree_sni`: (默认)使用 `SNI` (Server Name Indication) 作为主索引(基于 radixtree 引擎)。
[返回目录](#目录)
## Consumer
对于 API 网关通常可以用请求域名、客户端 IP 地址等字段识别到某类请求方,
然后进行插件过滤并转发请求到指定上游,但有时候这个深度不够。
![Consumer](../../assets/images/consumer-who.png)
如上图所示,作为 API 网关,需要知道 API Consumer消费方具体是谁这样就可以对不同 API Consumer 配置不同规则。
| 字段 | 必选 | 说明 |
| -------- | ---- | -------------------------------------------------------------------------------------------------------------------------------- |
| username | 是 | Consumer 名称。 |
| plugins | 否 | 该 Consumer 对应的插件配置它的优先级是最高的Consumer > Route > Service。对于具体插件配置可以参考 [Plugins](#plugin) 章节。 |
在 APISIX 中,识别 Consumer 的过程如下图:
![Consumer Internal](../../assets/images/consumer-internal.png)
1. 授权认证:比如有 [key-auth](plugins/key-auth.md)、[JWT](plugins/jwt-auth.md) 等。
2. 获取 consumer_name通过授权认证即可自然获取到对应的 Consumer name它是 Consumer 对象的唯一识别标识。
3. 获取 Consumer 上绑定的 Plugin 或 Upstream 信息:完成对不同 Consumer 做不同配置的效果。
概括一下Consumer 是某类服务的消费者,需与用户认证体系配合才能使用。
比如不同的 Consumer 请求同一个 API网关服务根据当前请求用户信息对应不同的 Plugin 或 Upstream 配置。
此外,大家也可以参考 [key-auth](plugins/key-auth.md) 认证授权插件的调用逻辑,辅助大家来进一步理解 Consumer 概念和使用。
如何对某个 Consumer 开启指定插件,可以看下面例子:
```shell
# 创建 Consumer ,指定认证插件 key-auth ,并开启特定插件 limit-count
$ curl http://127.0.0.1:9080/apisix/admin/consumers -H 'X-API-KEY: edd1c9f034335f136f87ad84b625c8f1' -X PUT -d '
{
"username": "jack",
"plugins": {
"key-auth": {
"key": "auth-one"
},
"limit-count": {
"count": 2,
"time_window": 60,
"rejected_code": 503,
"key": "remote_addr"
}
}
}'
# 创建 Router设置路由规则和启用插件配置
$ curl http://127.0.0.1:9080/apisix/admin/routes/1 -H 'X-API-KEY: edd1c9f034335f136f87ad84b625c8f1' -X PUT -d '
{
"plugins": {
"key-auth": {}
},
"upstream": {
"nodes": {
"127.0.0.1:1980": 1
},
"type": "roundrobin"
},
"uri": "/hello"
}'
# 发测试请求,前两次返回正常,没达到限速阈值
$ curl http://127.0.0.1:9080/hello -H 'apikey: auth-one' -I
...
$ curl http://127.0.0.1:9080/hello -H 'apikey: auth-one' -I
...
# 第三次测试返回 503请求被限制
$ curl http://127.0.0.1:9080/hello -H 'apikey: auth-one' -I
HTTP/1.1 503 Service Temporarily Unavailable
...
```
结合 [consumer-restriction](plugins/consumer-restriction.md) 插件,限制 jack 对该 route 的访问
```shell
# 设置黑名单禁止jack访问该API
$ curl http://127.0.0.1:9080/apisix/admin/routes/1 -H 'X-API-KEY: edd1c9f034335f136f87ad84b625c8f1' -X PUT -d '
{
"plugins": {
"key-auth": {},
"consumer-restriction": {
"blacklist": [
"jack"
]
}
},
"upstream": {
"nodes": {
"127.0.0.1:1980": 1
},
"type": "roundrobin"
},
"uri": "/hello"
}'
# 反复测试,均返回 403jack被禁止访问
$ curl http://127.0.0.1:9080/hello -H 'apikey: auth-one' -I
HTTP/1.1 403
...
```
[返回目录](#目录)
## Global Rule
[Plugin](#plugin) 只能绑定在 [Service](#service) 或者 [Route](#route) 上,如果我们需要一个能作用于所有请求的 [Plugin](#plugin) 该怎么办呢?
这时候我们可以使用 `GlobalRule` 来注册一个全局的 [Plugin](#plugin):
```shell
curl -X PUT \
https://{apisix_listen_address}/apisix/admin/global_rules/1 \
-H 'Content-Type: application/json' \
-H 'X-API-KEY: edd1c9f034335f136f87ad84b625c8f1' \
-d '{
"plugins": {
"limit-count": {
"time_window": 60,
"policy": "local",
"count": 2,
"key": "remote_addr",
"rejected_code": 503
}
}
}'
```
如上所注册的 `limit-count` 插件将会作用于所有的请求。
我们可以通过以下接口查看所有的 `GlobalRule`:
```shell
curl https://{apisix_listen_address}/apisix/admin/global_rules -H 'X-API-KEY: edd1c9f034335f136f87ad84b625c8f1'
```
[返回目录](#目录)
## Plugin Config
如果你想要复用一组通用的插件配置,你可以把它们提取成一个 Plugin config并绑定到对应的路由上。
举个例子,你可以这么做:
```shell
# 创建 Plugin config
$ curl http://127.0.0.1:9080/apisix/admin/plugin_configs/1 -H 'X-API-KEY: edd1c9f034335f136f87ad84b625c8f1' -X PUT -i -d '
{
"desc": "吾乃插件配置1",
"plugins": {
"limit-count": {
"count": 2,
"time_window": 60,
"rejected_code": 503
}
}
}'
# 绑定到路由上
$ curl http://127.0.0.1:9080/apisix/admin/routes/1 -H 'X-API-KEY: edd1c9f034335f136f87ad84b625c8f1' -X PUT -i -d '
{
"uris": ["/index.html"],
"plugin_config_id": 1,
"upstream": {
"type": "roundrobin",
"nodes": {
"39.97.63.215:80": 1
}
}
}'
```
如果找不到对应的 Plugin config该路由上的请求会报 503 错误。
如果这个路由已经配置了 `plugins`,那么 Plugin config 里面的插件配置会合并进去。
相同的插件会覆盖掉 `plugins` 原有的插件。
举个例子:
```
{
"desc": "吾乃插件配置1",
"plugins": {
"ip-restriction": {
"whitelist": [
"127.0.0.0/24",
"113.74.26.106"
]
},
"limit-count": {
"count": 2,
"time_window": 60,
"rejected_code": 503
}
}
}
```
-
```
{
"uris": ["/index.html"],
"plugin_config_id": 1,
"upstream": {
"type": "roundrobin",
"nodes": {
"39.97.63.215:80": 1
}
}
"plugins": {
"proxy-rewrite": {
"uri": "/test/add",
"scheme": "https",
"host": "apisix.iresty.com"
},
"limit-count": {
"count": 20,
"time_window": 60,
"rejected_code": 503,
"key": "remote_addr"
}
}
}
```
=
```
{
"uris": ["/index.html"],
"upstream": {
"type": "roundrobin",
"nodes": {
"39.97.63.215:80": 1
}
}
"plugins": {
"ip-restriction": {
"whitelist": [
"127.0.0.0/24",
"113.74.26.106"
]
},
"proxy-rewrite": {
"uri": "/test/add",
"scheme": "https",
"host": "apisix.iresty.com"
},
"limit-count": {
"count": 2,
"time_window": 60,
"rejected_code": 503
}
}
}
```
[返回目录](#目录)
## Debug mode
### 基本调试模式
设置 `conf/config.yaml` 中的 `apisix.enable_debug``true`,即可开启基本调试模式。
比如对 `/hello` 开启了 `limit-conn`和`limit-count`插件,这时候应答头中会有 `Apisix-Plugins: limit-conn, limit-count`
```shell
$ curl http://127.0.0.1:1984/hello -i
HTTP/1.1 200 OK
Content-Type: text/plain
Transfer-Encoding: chunked
Connection: keep-alive
Apisix-Plugins: limit-conn, limit-count
X-RateLimit-Limit: 2
X-RateLimit-Remaining: 1
Server: openresty
hello world
```
如果这个信息无法通过 HTTP 应答头传递,比如插件在 stream 子系统里面执行,
那么这个信息会以 warn 等级日志写入到错误日志中。
### 高级调试模式
设置 `conf/debug.yaml` 中的选项,开启高级调试模式。由于 APISIX 服务启动后是每秒定期检查该文件,
当可以正常读取到 `#END` 结尾时,才认为文件处于写完关闭状态。
根据文件最后修改时间判断文件内容是否有变化,如有变化则重新加载,如没变化则跳过本次检查。
所以高级调试模式的开启、关闭都是热更新方式完成。
| 名字 | 可选项 | 说明 | 默认值 |
| ------------------------------- | ------ | ------------------------------------------------------------------ | ------ |
| hook_conf.enable | 必选项 | 是否开启 hook 追踪调试。开启后将打印指定模块方法的请求参数或返回值 | false |
| hook_conf.name | 必选项 | 开启 hook 追踪调试的模块列表名称 | |
| hook_conf.log_level | 必选项 | 打印请求参数和返回值的日志级别 | warn |
| hook_conf.is_print_input_args | 必选项 | 是否打印输入参数 | true |
| hook_conf.is_print_return_value | 必选项 | 是否打印返回值 | true |
请看下面示例:
```yaml
hook_conf:
enable: false # 是否开启 hook 追踪调试
name: hook_phase # 开启 hook 追踪调试的模块列表名称
log_level: warn # 日志级别
is_print_input_args: true # 是否打印输入参数
is_print_return_value: true # 是否打印返回值
hook_phase: # 模块函数列表名字hook_phase
apisix: # 引用的模块名称
- http_access_phase # 函数名:数组
- http_header_filter_phase
- http_body_filter_phase
- http_log_phase
#END
```
[返回目录](#目录)

View File

@ -0,0 +1,58 @@
---
title: APISIX
---
<!--
#
# Licensed to the Apache Software Foundation (ASF) under one or more
# contributor license agreements. See the NOTICE file distributed with
# this work for additional information regarding copyright ownership.
# The ASF licenses this file to You under the Apache License, Version 2.0
# (the "License"); you may not use this file except in compliance with
# the License. You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
-->
## 插件加载流程
![插件加载流程](../../../assets/images/flow-load-plugin.png)
## 插件内部结构
![插件内部结构](../../../assets/images/flow-plugin-internal.png)
## 配置 APISIX
通过修改本地 `conf/config.yaml` 文件,或者在启动 APISIX 时使用 `-c``--config` 添加文件路径参数 `apisix start -c <path string>`,完成对 APISIX 服务本身的基本配置。
比如修改 APISIX 默认监听端口为 8000其他配置保持默认`config.yaml` 中只需这样配置:
```yaml
apisix:
node_listen: 8000 # APISIX listening port
```
比如指定 APISIX 默认监听端口为 8000并且设置 etcd 地址为 `http://foo:2379`
其他配置保持默认。在 `config.yaml` 中只需这样配置:
```yaml
apisix:
node_listen: 8000 # APISIX listening port
etcd:
host: "http://foo:2379" # etcd address
```
其他默认配置,可以在 `conf/config-default.yaml` 文件中看到,该文件是与 APISIX 源码强绑定,
**永远不要**手工修改 `conf/config-default.yaml` 文件。如果需要自定义任何配置,都应在 `config.yaml` 文件中完成。
_注意_ 不要手工修改 APISIX 自身的 `conf/nginx.conf` 文件,当服务每次启动时,`apisix`
会根据 `config.yaml` 配置自动生成新的 `conf/nginx.conf` 并自动启动服务。

View File

@ -0,0 +1,127 @@
---
title: Consumer
---
<!--
#
# Licensed to the Apache Software Foundation (ASF) under one or more
# contributor license agreements. See the NOTICE file distributed with
# this work for additional information regarding copyright ownership.
# The ASF licenses this file to You under the Apache License, Version 2.0
# (the "License"); you may not use this file except in compliance with
# the License. You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
-->
对于 API 网关通常可以用请求域名、客户端 IP 地址等字段识别到某类请求方,
然后进行插件过滤并转发请求到指定上游,但有时候这个深度不够。
![Consumer](../../../assets/images/consumer-who.png)
如上图所示,作为 API 网关,需要知道 API Consumer消费方具体是谁这样就可以对不同 API Consumer 配置不同规则。
| 字段 | 必选 | 说明 |
| -------- | ---- | -------------------------------------------------------------------------------------------------------------------------------- |
| username | 是 | Consumer 名称。 |
| plugins | 否 | 该 Consumer 对应的插件配置它的优先级是最高的Consumer > Route > Service。对于具体插件配置可以参考 [Plugins](plugin.md) 章节。 |
在 APISIX 中,识别 Consumer 的过程如下图:
![Consumer Internal](../../../assets/images/consumer-internal.png)
1. 授权认证:比如有 [key-auth](../plugins/key-auth.md)、[JWT](../plugins/jwt-auth.md) 等。
2. 获取 consumer_name通过授权认证即可自然获取到对应的 Consumer name它是 Consumer 对象的唯一识别标识。
3. 获取 Consumer 上绑定的 Plugin 或 Upstream 信息:完成对不同 Consumer 做不同配置的效果。
概括一下Consumer 是某类服务的消费者,需与用户认证体系配合才能使用。
比如不同的 Consumer 请求同一个 API网关服务根据当前请求用户信息对应不同的 Plugin 或 Upstream 配置。
此外,大家也可以参考 [key-auth](../plugins/key-auth.md) 认证授权插件的调用逻辑,辅助大家来进一步理解 Consumer 概念和使用。
如何对某个 Consumer 开启指定插件,可以看下面例子:
```shell
# 创建 Consumer ,指定认证插件 key-auth ,并开启特定插件 limit-count
$ curl http://127.0.0.1:9080/apisix/admin/consumers -H 'X-API-KEY: edd1c9f034335f136f87ad84b625c8f1' -X PUT -d '
{
"username": "jack",
"plugins": {
"key-auth": {
"key": "auth-one"
},
"limit-count": {
"count": 2,
"time_window": 60,
"rejected_code": 503,
"key": "remote_addr"
}
}
}'
# 创建 Router设置路由规则和启用插件配置
$ curl http://127.0.0.1:9080/apisix/admin/routes/1 -H 'X-API-KEY: edd1c9f034335f136f87ad84b625c8f1' -X PUT -d '
{
"plugins": {
"key-auth": {}
},
"upstream": {
"nodes": {
"127.0.0.1:1980": 1
},
"type": "roundrobin"
},
"uri": "/hello"
}'
# 发测试请求,前两次返回正常,没达到限速阈值
$ curl http://127.0.0.1:9080/hello -H 'apikey: auth-one' -I
...
$ curl http://127.0.0.1:9080/hello -H 'apikey: auth-one' -I
...
# 第三次测试返回 503请求被限制
$ curl http://127.0.0.1:9080/hello -H 'apikey: auth-one' -I
HTTP/1.1 503 Service Temporarily Unavailable
...
```
结合 [consumer-restriction](../plugins/consumer-restriction.md) 插件,限制 jack 对该 route 的访问
```shell
# 设置黑名单禁止jack访问该API
$ curl http://127.0.0.1:9080/apisix/admin/routes/1 -H 'X-API-KEY: edd1c9f034335f136f87ad84b625c8f1' -X PUT -d '
{
"plugins": {
"key-auth": {},
"consumer-restriction": {
"blacklist": [
"jack"
]
}
},
"upstream": {
"nodes": {
"127.0.0.1:1980": 1
},
"type": "roundrobin"
},
"uri": "/hello"
}'
# 反复测试,均返回 403jack被禁止访问
$ curl http://127.0.0.1:9080/hello -H 'apikey: auth-one' -I
HTTP/1.1 403
...
```

View File

@ -0,0 +1,80 @@
---
title: Debug Mode
---
<!--
#
# Licensed to the Apache Software Foundation (ASF) under one or more
# contributor license agreements. See the NOTICE file distributed with
# this work for additional information regarding copyright ownership.
# The ASF licenses this file to You under the Apache License, Version 2.0
# (the "License"); you may not use this file except in compliance with
# the License. You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
-->
### 基本调试模式
设置 `conf/config.yaml` 中的 `apisix.enable_debug``true`,即可开启基本调试模式。
比如对 `/hello` 开启了 `limit-conn`和`limit-count`插件,这时候应答头中会有 `Apisix-Plugins: limit-conn, limit-count`
```shell
$ curl http://127.0.0.1:1984/hello -i
HTTP/1.1 200 OK
Content-Type: text/plain
Transfer-Encoding: chunked
Connection: keep-alive
Apisix-Plugins: limit-conn, limit-count
X-RateLimit-Limit: 2
X-RateLimit-Remaining: 1
Server: openresty
hello world
```
如果这个信息无法通过 HTTP 应答头传递,比如插件在 stream 子系统里面执行,
那么这个信息会以 warn 等级日志写入到错误日志中。
### 高级调试模式
设置 `conf/debug.yaml` 中的选项,开启高级调试模式。由于 APISIX 服务启动后是每秒定期检查该文件,
当可以正常读取到 `#END` 结尾时,才认为文件处于写完关闭状态。
根据文件最后修改时间判断文件内容是否有变化,如有变化则重新加载,如没变化则跳过本次检查。
所以高级调试模式的开启、关闭都是热更新方式完成。
| 名字 | 可选项 | 说明 | 默认值 |
| ------------------------------- | ------ | ------------------------------------------------------------------ | ------ |
| hook_conf.enable | 必选项 | 是否开启 hook 追踪调试。开启后将打印指定模块方法的请求参数或返回值 | false |
| hook_conf.name | 必选项 | 开启 hook 追踪调试的模块列表名称 | |
| hook_conf.log_level | 必选项 | 打印请求参数和返回值的日志级别 | warn |
| hook_conf.is_print_input_args | 必选项 | 是否打印输入参数 | true |
| hook_conf.is_print_return_value | 必选项 | 是否打印返回值 | true |
请看下面示例:
```yaml
hook_conf:
enable: false # 是否开启 hook 追踪调试
name: hook_phase # 开启 hook 追踪调试的模块列表名称
log_level: warn # 日志级别
is_print_input_args: true # 是否打印输入参数
is_print_return_value: true # 是否打印返回值
hook_phase: # 模块函数列表名字hook_phase
apisix: # 引用的模块名称
- http_access_phase # 函数名:数组
- http_header_filter_phase
- http_body_filter_phase
- http_log_phase
#END
```

View File

@ -0,0 +1,51 @@
---
title: Global rule
---
<!--
#
# Licensed to the Apache Software Foundation (ASF) under one or more
# contributor license agreements. See the NOTICE file distributed with
# this work for additional information regarding copyright ownership.
# The ASF licenses this file to You under the Apache License, Version 2.0
# (the "License"); you may not use this file except in compliance with
# the License. You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
-->
[Plugin](plugin.md) 只能绑定在 [Service](service.md) 或者 [Route](route.md) 上,如果我们需要一个能作用于所有请求的 [Plugin](plugin.md) 该怎么办呢?
这时候我们可以使用 `GlobalRule` 来注册一个全局的 [Plugin](plugin.md):
```shell
curl -X PUT \
https://{apisix_listen_address}/apisix/admin/global_rules/1 \
-H 'Content-Type: application/json' \
-H 'X-API-KEY: edd1c9f034335f136f87ad84b625c8f1' \
-d '{
"plugins": {
"limit-count": {
"time_window": 60,
"policy": "local",
"count": 2,
"key": "remote_addr",
"rejected_code": 503
}
}
}'
```
如上所注册的 `limit-count` 插件将会作用于所有的请求。
我们可以通过以下接口查看所有的 `GlobalRule`:
```shell
curl https://{apisix_listen_address}/apisix/admin/global_rules -H 'X-API-KEY: edd1c9f034335f136f87ad84b625c8f1'
```

View File

@ -0,0 +1,140 @@
---
title: Plugin Config
---
<!--
#
# Licensed to the Apache Software Foundation (ASF) under one or more
# contributor license agreements. See the NOTICE file distributed with
# this work for additional information regarding copyright ownership.
# The ASF licenses this file to You under the Apache License, Version 2.0
# (the "License"); you may not use this file except in compliance with
# the License. You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
-->
如果你想要复用一组通用的插件配置,你可以把它们提取成一个 Plugin config并绑定到对应的路由上。
举个例子,你可以这么做:
```shell
# 创建 Plugin config
$ curl http://127.0.0.1:9080/apisix/admin/plugin_configs/1 -H 'X-API-KEY: edd1c9f034335f136f87ad84b625c8f1' -X PUT -i -d '
{
"desc": "吾乃插件配置1",
"plugins": {
"limit-count": {
"count": 2,
"time_window": 60,
"rejected_code": 503
}
}
}'
# 绑定到路由上
$ curl http://127.0.0.1:9080/apisix/admin/routes/1 -H 'X-API-KEY: edd1c9f034335f136f87ad84b625c8f1' -X PUT -i -d '
{
"uris": ["/index.html"],
"plugin_config_id": 1,
"upstream": {
"type": "roundrobin",
"nodes": {
"39.97.63.215:80": 1
}
}
}'
```
如果找不到对应的 Plugin config该路由上的请求会报 503 错误。
如果这个路由已经配置了 `plugins`,那么 Plugin config 里面的插件配置会合并进去。
相同的插件会覆盖掉 `plugins` 原有的插件。
举个例子:
```
{
"desc": "吾乃插件配置1",
"plugins": {
"ip-restriction": {
"whitelist": [
"127.0.0.0/24",
"113.74.26.106"
]
},
"limit-count": {
"count": 2,
"time_window": 60,
"rejected_code": 503
}
}
}
```
加上
```
{
"uris": ["/index.html"],
"plugin_config_id": 1,
"upstream": {
"type": "roundrobin",
"nodes": {
"39.97.63.215:80": 1
}
}
"plugins": {
"proxy-rewrite": {
"uri": "/test/add",
"scheme": "https",
"host": "apisix.iresty.com"
},
"limit-count": {
"count": 20,
"time_window": 60,
"rejected_code": 503,
"key": "remote_addr"
}
}
}
```
等于
```
{
"uris": ["/index.html"],
"upstream": {
"type": "roundrobin",
"nodes": {
"39.97.63.215:80": 1
}
}
"plugins": {
"ip-restriction": {
"whitelist": [
"127.0.0.0/24",
"113.74.26.106"
]
},
"proxy-rewrite": {
"uri": "/test/add",
"scheme": "https",
"host": "apisix.iresty.com"
},
"limit-count": {
"count": 2,
"time_window": 60,
"rejected_code": 503
}
}
}
```

View File

@ -0,0 +1,70 @@
---
title: Plugin
---
<!--
#
# Licensed to the Apache Software Foundation (ASF) under one or more
# contributor license agreements. See the NOTICE file distributed with
# this work for additional information regarding copyright ownership.
# The ASF licenses this file to You under the Apache License, Version 2.0
# (the "License"); you may not use this file except in compliance with
# the License. You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
-->
`Plugin` 表示将在 `HTTP` 请求/响应生命周期期间执行的插件配置。
`Plugin` 配置可直接绑定在 `Route` 上,也可以被绑定在 `Service``Consumer`上。而对于同一
个插件的配置,只能有一份是有效的,配置选择优先级总是 `Consumer` > `Route` > `Service`
`conf/config.yaml` 中,可以声明本地 APISIX 节点都支持哪些插件。这是个白名单机制,不在该
白名单的插件配置,都将会被自动忽略。这个特性可用于临时关闭或打开特定插件,应对突发情况非常有效。
如果你想在现有插件的基础上新增插件,注意需要拷贝 `conf/config-default.yaml` 的插件节点内容到 `conf/config.yaml` 的插件节点中。
插件的配置可以被直接绑定在指定 Route 中,也可以被绑定在 Service 中,不过 Route 中的插件配置
优先级更高。
一个插件在一次请求中只会执行一次,即使被同时绑定到多个不同对象中(比如 Route 或 Service
插件运行先后顺序是根据插件自身的优先级来决定的,例如:
```lua
local _M = {
version = 0.1,
priority = 0, -- 这个插件的优先级为 0
name = plugin_name,
schema = schema,
metadata_schema = metadata_schema,
}
```
插件配置作为 Route 或 Service 的一部分提交的,放到 `plugins` 下。它内部是使用插件
名字作为哈希的 key 来保存不同插件的配置项。
```json
{
...
"plugins": {
"limit-count": {
"count": 2,
"time_window": 60,
"rejected_code": 503,
"key": "remote_addr"
},
"prometheus": {}
}
}
```
并不是所有插件都有具体配置项,比如 `prometheus` 下是没有任何具体配置项,这时候用一个空的对象
标识即可。
如果一个请求因为某个插件而被拒绝,会有类似这样的 warn 日志:`ip-restriction exits with http status code 403`。

View File

@ -0,0 +1,62 @@
---
title: Route
---
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Route 字面意思就是路由,通过定义一些规则来匹配客户端的请求,然后根据匹配结果加载并执行相应的
插件,并把请求转发给到指定 Upstream。
Route 中主要包含三部分内容:匹配规则(比如 uri、host、remote_addr 等),插件配置(限流限速等)和上游信息。
请看下图示例,是一些 Route 规则的实例,当某些属性值相同时,图中用相同颜色标识。
![路由示例](../../../assets/images/routes-example.png)
我们直接在 Route 中完成所有参数的配置,优点是容易设置,每个 Route 都相对独立自由度比较高。但当我们的 Route 有比较多的重复配置(比如启用相同的插件配置或上游信息),一旦我们要更新这些相同属性时,就需要遍历所有 Route 并进行修改,给后期管理维护增加不少复杂度。
上面提及重复的缺点在 APISIX 中独立抽象了 [Service](service.md) 和 [Upstream](upstream.md) 两个概念来解决。
下面创建的 Route 示例,是把 URL 为 "/index.html" 的请求代理到地址为 "39.97.63.215:80" 的 Upstream 服务:
```shell
$ curl http://127.0.0.1:9080/apisix/admin/routes/1 -H 'X-API-KEY: edd1c9f034335f136f87ad84b625c8f1' -X PUT -i -d '
{
"uri": "/index.html",
"upstream": {
"type": "roundrobin",
"nodes": {
"39.97.63.215:80": 1
}
}
}'
HTTP/1.1 201 Created
Date: Sat, 31 Aug 2019 01:17:15 GMT
Content-Type: text/plain
Transfer-Encoding: chunked
Connection: keep-alive
Server: APISIX web server
{"node":{"value":{"uri":"\/index.html","upstream":{"nodes":{"39.97.63.215:80":1},"type":"roundrobin"}},"createdIndex":61925,"key":"\/apisix\/routes\/1","modifiedIndex":61925},"action":"create"}
```
当我们接收到成功应答,表示该 Route 已成功创建。
有关 Route 的具体选项,可具体查阅 [Admin API 之 Route](../admin-api.md#route)。

View File

@ -0,0 +1,39 @@
---
title: Router
---
<!--
#
# Licensed to the Apache Software Foundation (ASF) under one or more
# contributor license agreements. See the NOTICE file distributed with
# this work for additional information regarding copyright ownership.
# The ASF licenses this file to You under the Apache License, Version 2.0
# (the "License"); you may not use this file except in compliance with
# the License. You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
-->
APISIX 区别于其他 API 网关的一大特点是允许用户选择不同 Router 来更好匹配自由业务,在性能、自由之间做最适合选择。
在本地配置 `conf/config.yaml` 中设置最符合自身业务需求的路由。
- `apisix.router.http`: HTTP 请求路由。
- `radixtree_uri`: (默认)只使用 `uri` 作为主索引。基于 `radixtree` 引擎,支持全量和深前缀匹配,更多见 [如何使用 router-radixtree](../../../zh/latest/router-radixtree.md)。
- `绝对匹配`:完整匹配给定的 `uri` ,比如 `/foo/bar``/foo/glo`。
- `前缀匹配`:末尾使用 `*` 代表给定的 `uri` 是前缀匹配。比如 `/foo*`,则允许匹配 `/foo/`、`/foo/a`和`/foo/b`等。
- `匹配优先级`:优先尝试绝对匹配,若无法命中绝对匹配,再尝试前缀匹配。
- `任意过滤属性`:允许指定任何 Nginx 内置变量作为过滤条件,比如 URL 请求参数、请求头、cookie 等。
- `radixtree_uri_with_parameter`: 同 `radixtree_uri` 但额外有参数匹配的功能。
- `radixtree_host_uri`: 使用 `host + uri` 作为主索引(基于 `radixtree` 引擎),对当前请求会同时匹配 host 和 uri支持的匹配条件与 `radixtree_uri` 基本一致。
- `apisix.router.ssl`: SSL 加载匹配路由。
- `radixtree_sni`: (默认)使用 `SNI` (Server Name Indication) 作为主索引(基于 radixtree 引擎)。

View File

@ -0,0 +1,39 @@
---
title: Script
---
<!--
#
# Licensed to the Apache Software Foundation (ASF) under one or more
# contributor license agreements. See the NOTICE file distributed with
# this work for additional information regarding copyright ownership.
# The ASF licenses this file to You under the Apache License, Version 2.0
# (the "License"); you may not use this file except in compliance with
# the License. You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
-->
`Script` 表示将在 `HTTP` 请求/响应生命周期期间执行的脚本。
`Script` 配置可直接绑定在 `Route` 上。
`Script``Plugin` 互斥,且优先执行 `Script` ,这意味着配置 `Script` 后,`Route` 上配置的 `Plugin` 将不被执行。
理论上,在 `Script` 中可以写任意 lua 代码,也可以直接调用已有插件以重用已有的代码。
`Script` 也有执行阶段概念,支持 `access`、`header_filter`、`body_filter` 和 `log` 阶段。系统会在相应阶段中自动执行 `Script` 脚本中对应阶段的代码。
```json
{
...
"script": "local _M = {} \n function _M.access(api_ctx) \n ngx.log(ngx.INFO,\"hit access phase\") \n end \nreturn _M"
}
```

View File

@ -0,0 +1,88 @@
---
title: Service
---
<!--
#
# Licensed to the Apache Software Foundation (ASF) under one or more
# contributor license agreements. See the NOTICE file distributed with
# this work for additional information regarding copyright ownership.
# The ASF licenses this file to You under the Apache License, Version 2.0
# (the "License"); you may not use this file except in compliance with
# the License. You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
-->
`Service` 是某类 API 的抽象(也可以理解为一组 Route 的抽象)。它通常与上游服务抽象是一一对应的,`Route`
`Service` 之间,通常是 N:1 的关系,参看下图。
![服务示例](../../../assets/images/service-example.png)
不同 Route 规则同时绑定到一个 Service 上,这些 Route 将具有相同的上游和插件配置,减少冗余配置。
比如下面的例子,创建了一个启用限流插件的 Service然后把 id 为 `100`、`101` 的 Route 都绑定在这个 Service 上。
```shell
# create new Service
$ curl http://127.0.0.1:9080/apisix/admin/services/200 -H 'X-API-KEY: edd1c9f034335f136f87ad84b625c8f1' -X PUT -d '
{
"plugins": {
"limit-count": {
"count": 2,
"time_window": 60,
"rejected_code": 503,
"key": "remote_addr"
}
},
"upstream": {
"type": "roundrobin",
"nodes": {
"39.97.63.215:80": 1
}
}
}'
# create new Route and reference the service by id `200`
curl http://127.0.0.1:9080/apisix/admin/routes/100 -H 'X-API-KEY: edd1c9f034335f136f87ad84b625c8f1' -X PUT -d '
{
"methods": ["GET"],
"uri": "/index.html",
"service_id": "200"
}'
curl http://127.0.0.1:9080/apisix/admin/routes/101 -H 'X-API-KEY: edd1c9f034335f136f87ad84b625c8f1' -X PUT -d '
{
"methods": ["GET"],
"uri": "/foo/index.html",
"service_id": "200"
}'
```
当然我们也可以为 Route 指定不同的插件参数或上游,比如下面这个 Route 设置了不同的限流参数,其他部分(比如上游)则继续使用 Service 中的配置参数。
```shell
curl http://127.0.0.1:9080/apisix/admin/routes/102 -H 'X-API-KEY: edd1c9f034335f136f87ad84b625c8f1' -X PUT -d '
{
"uri": "/bar/index.html",
"id": "102",
"service_id": "200",
"plugins": {
"limit-count": {
"count": 2000,
"time_window": 60,
"rejected_code": 503,
"key": "remote_addr"
}
}
}'
```
注意:当 Route 和 Service 都开启同一个插件时Route 参数的优先级是高于 Service 的。

View File

@ -0,0 +1,218 @@
---
title: Upstream
---
<!--
#
# Licensed to the Apache Software Foundation (ASF) under one or more
# contributor license agreements. See the NOTICE file distributed with
# this work for additional information regarding copyright ownership.
# The ASF licenses this file to You under the Apache License, Version 2.0
# (the "License"); you may not use this file except in compliance with
# the License. You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
-->
Upstream 是虚拟主机抽象对给定的多个服务节点按照配置规则进行负载均衡。Upstream 的地址信息可以直接配置到 `Route`(或 `Service`) 上,当 Upstream 有重复时,就需要用“引用”方式避免重复了。
![Upstream 示例](../../../assets/images/upstream-example.png)
如上图所示,通过创建 Upstream 对象,在 `Route` 用 ID 方式引用,就可以确保只维护一个对象的值了。
Upstream 的配置可以被直接绑定在指定 `Route` 中,也可以被绑定在 `Service` 中,不过 `Route` 中的配置
优先级更高。这里的优先级行为与 `Plugin` 非常相似
### 配置参数
APISIX 的 Upstream 除了基本的复杂均衡算法选择外,还支持对上游做主被动健康检查、重试等逻辑,具体看这个[链接](../admin-api.md#upstram)。
创建上游对象用例:
```json
curl http://127.0.0.1:9080/apisix/admin/upstreams/1 -H 'X-API-KEY: edd1c9f034335f136f87ad84b625c8f1' -X PUT -d '
{
"type": "chash",
"key": "remote_addr",
"nodes": {
"127.0.0.1:80": 1,
"foo.com:80": 2
}
}'
```
上游对象创建后,均可以被具体 `Route``Service` 引用,例如:
```shell
curl http://127.0.0.1:9080/apisix/admin/routes/1 -H 'X-API-KEY: edd1c9f034335f136f87ad84b625c8f1' -X PUT -d '
{
"uri": "/index.html",
"upstream_id": 2
}'
```
为了方便使用,也可以直接把上游地址直接绑到某个 `Route``Service` ,例如:
```shell
curl http://127.0.0.1:9080/apisix/admin/routes/1 -H 'X-API-KEY: edd1c9f034335f136f87ad84b625c8f1' -X PUT -d '
{
"uri": "/index.html",
"plugins": {
"limit-count": {
"count": 2,
"time_window": 60,
"rejected_code": 503,
"key": "remote_addr"
}
},
"upstream": {
"type": "roundrobin",
"nodes": {
"39.97.63.215:80": 1
}
}
}'
```
下面是一个配置了健康检查的示例:
```shell
curl http://127.0.0.1:9080/apisix/admin/routes/1 -H 'X-API-KEY: edd1c9f034335f136f87ad84b625c8f1' -X PUT -d '
{
"uri": "/index.html",
"plugins": {
"limit-count": {
"count": 2,
"time_window": 60,
"rejected_code": 503,
"key": "remote_addr"
}
},
"upstream": {
"nodes": {
"39.97.63.215:80": 1
}
"type": "roundrobin",
"retries": 2,
"checks": {
"active": {
"http_path": "/status",
"host": "foo.com",
"healthy": {
"interval": 2,
"successes": 1
},
"unhealthy": {
"interval": 1,
"http_failures": 2
}
}
}
}
}'
```
更多细节可以参考[健康检查的文档](../health-check.md)。
下面是几个使用不同`hash_on`类型的配置示例:
#### Consumer
创建一个 consumer 对象:
```shell
curl http://127.0.0.1:9080/apisix/admin/consumers -H 'X-API-KEY: edd1c9f034335f136f87ad84b625c8f1' -X PUT -d '
{
"username": "jack",
"plugins": {
"key-auth": {
"key": "auth-jack"
}
}
}'
```
新建路由,打开`key-auth`插件认证,`upstream`的`hash_on`类型为`consumer`
```shell
curl http://127.0.0.1:9080/apisix/admin/routes/1 -H 'X-API-KEY: edd1c9f034335f136f87ad84b625c8f1' -X PUT -d '
{
"plugins": {
"key-auth": {}
},
"upstream": {
"nodes": {
"127.0.0.1:1980": 1,
"127.0.0.1:1981": 1
},
"type": "chash",
"hash_on": "consumer"
},
"uri": "/server_port"
}'
```
测试请求,认证通过后的`consumer_name`将作为负载均衡哈希算法的哈希值:
```shell
curl http://127.0.0.1:9080/server_port -H "apikey: auth-jack"
```
##### Cookie
新建路由和`Upstream``hash_on`类型为`cookie`
```shell
curl http://127.0.0.1:9080/apisix/admin/routes/1 -H 'X-API-KEY: edd1c9f034335f136f87ad84b625c8f1' -X PUT -d '
{
"uri": "/hash_on_cookie",
"upstream": {
"key": "sid",
"type ": "chash",
"hash_on ": "cookie",
"nodes ": {
"127.0.0.1:1980": 1,
"127.0.0.1:1981": 1
}
}
}'
```
客户端请求携带`Cookie`
```shell
curl http://127.0.0.1:9080/hash_on_cookie -H 'X-API-KEY: edd1c9f034335f136f87ad84b625c8f1' -H "Cookie: sid=3c183a30cffcda1408daf1c61d47b274"
```
##### Header
新建路由和`Upstream``hash_on`类型为`header` `key`为`content-type`
```shell
curl http://127.0.0.1:9080/apisix/admin/routes/1 -H 'X-API-KEY: edd1c9f034335f136f87ad84b625c8f1' -X PUT -d '
{
"uri": "/hash_on_header",
"upstream": {
"key": "content-type",
"type ": "chash",
"hash_on ": "header",
"nodes ": {
"127.0.0.1:1980": 1,
"127.0.0.1:1981": 1
}
}
}'
```
客户端请求携带`content-type`的`header`
```shell
curl http://127.0.0.1:9080/hash_on_header -H 'X-API-KEY: edd1c9f034335f136f87ad84b625c8f1' -H "Content-Type: application/json"
```

View File

@ -2,8 +2,21 @@
"version": 2.4,
"sidebar": [
{
"type": "doc",
"id": "architecture-design"
"type": "category",
"label": "Architecture Design",
"items": [
"architecture-design/apisix",
"architecture-design/route",
"architecture-design/plugin",
"architecture-design/script",
"architecture-design/service",
"architecture-design/consumer",
"architecture-design/upstream",
"architecture-design/global-rule",
"architecture-design/plugin-config",
"architecture-design/router",
"architecture-design/debug-mode"
]
},
{
"type": "doc",
@ -108,57 +121,69 @@
]
},
{
"type": "doc",
"id": "admin-api"
},
{
"type": "doc",
"id": "control-api"
},
{
"type": "doc",
"id": "health-check"
},
{
"type": "doc",
"id": "router-radixtree"
},
{
"type": "doc",
"id": "stand-alone"
},
{
"type": "doc",
"id": "stream-proxy"
},
{
"type": "doc",
"id": "grpc-proxy"
},
{
"type": "doc",
"id": "customize-nginx-configuration"
},
{
"type": "doc",
"id": "https"
},
{
"type": "doc",
"id": "benchmark"
},
{
"type": "doc",
"id": "CODE_STYLE"
},
{
"type": "doc",
"id": "debug-function"
"type": "category",
"label": "API",
"items": [
{
"type": "doc",
"id": "admin-api"
},
{
"type": "doc",
"id": "control-api"
}
]
},
{
"type": "doc",
"id": "FAQ"
},
{
"type": "category",
"label": "Others",
"items": [
{
"type": "doc",
"id": "health-check"
},
{
"type": "doc",
"id": "router-radixtree"
},
{
"type": "doc",
"id": "stand-alone"
},
{
"type": "doc",
"id": "stream-proxy"
},
{
"type": "doc",
"id": "grpc-proxy"
},
{
"type": "doc",
"id": "customize-nginx-configuration"
},
{
"type": "doc",
"id": "https"
},
{
"type": "doc",
"id": "benchmark"
},
{
"type": "doc",
"id": "CODE_STYLE"
},
{
"type": "doc",
"id": "debug-function"
}
]
},
{
"type": "doc",
"id": "CHANGELOG"