2019-10-31 09:27:28 +08:00
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# Licensed to the Apache Software Foundation (ASF) under one or more
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# http://www.apache.org/licenses/LICENSE-2.0
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-->
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2020-06-19 12:03:55 +08:00
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[English](../../plugins/serverless.md)
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2019-09-03 13:32:41 +08:00
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2019-08-26 13:10:15 +08:00
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# serverless
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2020-04-28 15:53:29 +08:00
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2019-08-26 13:10:15 +08:00
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serverless 的插件有两个,分别是 `serverless-pre-function` 和 `serverless-post-function`,
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前者会在指定阶段的最开始运行,后者是在指定阶段的最后运行。
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这两个插件接收的参数都是一样的。
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2020-04-28 15:53:29 +08:00
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## Parameters
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2019-08-26 13:10:15 +08:00
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* `phase`: 指定的运行阶段,没有指定的话默认是 `access`。允许的阶段有:`rewrite`、`access`
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`header_filer`、`body_filter`、`log` 和 `balancer` 阶段。
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* `functions`: 指定运行的函数列表,是数组类型,里面可以包含一个函数,也可以是多个函数,按照先后顺序执行。
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2020-04-28 15:53:29 +08:00
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2019-08-26 13:10:15 +08:00
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需要注意的是,这里只接受函数,而不接受其他类型的 Lua 代码。比如匿名函数是合法的:
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2020-04-28 15:53:29 +08:00
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```lua
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2019-08-26 13:10:15 +08:00
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return function()
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ngx.log(ngx.ERR, 'one')
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end
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```
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闭包也是合法的:
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2020-04-28 15:53:29 +08:00
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```lua
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2019-08-26 13:10:15 +08:00
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local count = 1
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return function()
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count = count + 1
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ngx.say(count)
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end
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```
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但不是函数类型的代码就是非法的:
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2020-04-28 15:53:29 +08:00
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```lua
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2019-08-26 13:10:15 +08:00
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local count = 1
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ngx.say(count)
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```
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2020-04-28 15:53:29 +08:00
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## 示例
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### 启动插件
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2019-08-26 13:10:15 +08:00
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下面是一个示例,在指定的 route 上开启了 serverless 插件:
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```shell
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2020-03-05 14:48:27 +08:00
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curl -i http://127.0.0.1:9080/apisix/admin/routes/1 -H 'X-API-KEY: edd1c9f034335f136f87ad84b625c8f1' -X PUT -d '
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2019-08-26 13:10:15 +08:00
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{
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"uri": "/index.html",
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"plugins": {
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2019-12-30 20:28:36 +08:00
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"serverless-pre-function": {
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"phase": "rewrite",
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"functions" : ["return function() ngx.log(ngx.ERR, \"serverless pre function\"); end"]
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}
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2019-08-26 13:10:15 +08:00
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},
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"upstream": {
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"type": "roundrobin",
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"nodes": {
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"39.97.63.215:80": 1
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}
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}
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}'
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```
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2020-04-28 15:53:29 +08:00
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### 测试插件
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2019-08-26 13:10:15 +08:00
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使用 curl 访问:
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2020-04-28 15:53:29 +08:00
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2019-08-26 13:10:15 +08:00
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```shell
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curl -i http://127.0.0.1:9080/index.html
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```
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然后你在 error.log 日志中就会发现 `serverless pre function` 这个 error 级别的日志,
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表示指定的函数已经生效。
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2020-04-28 15:53:29 +08:00
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### 移除插件
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2019-08-26 13:10:15 +08:00
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当你想去掉插件的时候,很简单,在插件的配置中把对应的 json 配置删除即可,无须重启服务,即刻生效:
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```shell
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2020-03-05 14:48:27 +08:00
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curl http://127.0.0.1:9080/apisix/admin/routes/1 -H 'X-API-KEY: edd1c9f034335f136f87ad84b625c8f1' -X PUT -d '
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2019-08-26 13:10:15 +08:00
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{
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"methods": ["GET"],
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"uri": "/index.html",
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"upstream": {
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"type": "roundrobin",
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"nodes": {
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"39.97.63.215:80": 1
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}
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}
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}'
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```
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现在就已经移除了 serverless 插件了。其他插件的开启和移除也是同样的方法。
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