nginx 请求复制

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nginx 请求复制

2024-04-23 13:41| 来源: 网络整理| 查看: 265

Nginx 请求复制功能

Nginx 1.13.4 引入了 ngx_http_mirror_module，实现了 http 请求复制的功能。

准备接收复制请求的服务

启动两个容器一个正常处理请求，一个接收复制到请求：

docker rm -f echoserver docker run -idt --name echoserver -p 9090:8080 googlecontainer/echoserver:1.10 docker rm -f http-record docker run -idt --name http-record -p 9091:8080 lijiaocn/http-record:0.0.1

执行：

./start_backends.sh 配置请求复制

在 nginx 的配置文件中，配置镜像复制，参考 ngx_http_mirror_module。

upstream echo_upstream{ server 127.0.0.1:9090; keepalive 1; } upstream http-record_upstream{ server 127.0.0.1:9091; keepalive 1; } server { listen 9000; listen [::]:9000; server_name echo.example; keepalive_requests 2000; keepalive_timeout 60s; location / { mirror /mirror; proxy_pass http://echo_upstream; proxy_http_version 1.1; proxy_set_header Connection ""; } location = /mirror { internal; proxy_pass http://http-record_upstream$request_uri; } }

所有发送到 echo.example 的请求将被复制一份到 http-record，请求端收到的是 echo_upstream 的回应，http-record_upstream 的回应将被忽略。

复制效果

发起请求，收到的是 echo 的回应：

$ curl -H "Host: echo.example" 127.0.0.1:9000/abcd/eft Hostname: 57e34b409aa1 Pod Information: -no pod information available- Server values: server_version=nginx: 1.13.3 - lua: 10008 Request Information: client_address=172.17.0.1 method=GET real path=/abcd/eft query= request_version=1.1 request_scheme=http request_uri=http://echo_upstream:8080/abcd/eft Request Headers: accept=*/* host=echo_upstream user-agent=curl/7.54.0 Request Body: -no body in request-

查看 http-record 容器的日志，会发现收到了完全相同的请求：

/go/src/Server/echo.go:46: { "RemoteAddr": "172.17.0.1:46856", "Method": "GET", "Host": "http-record_upstream", "RequestURI": "/abcd/eft", "Header": { "Accept": [ "*/*" ], "Connection": [ "close" ], "User-Agent": [ "curl/7.54.0" ] }, "Body": "" } 配置修正

仔细观察上面的配置 Host 是 http-record_upstream，不是原始的 host。将配置修正为：

location / { access_log /tmp/logs/access.log mirror; mirror /mirror; # 添加这行配置 set $proxy_host $host; proxy_http_version 1.1; proxy_set_header Connection ""; proxy_pass http://echo_upstream; } 结合 split_clients 实现请求的部分复制

用于 A/B 测试的 split_clients 指令和 mirror 指令配合，可以实现请求的按比例复制，split_clients 的用法见 Nginx的A/B测试功能。

将 50% 的流量复制到复制到 record_upstream：

split_clients "$date_gmt" $mirror_servers { 50% record_upstream; * ""; } server { listen 9000; server_name echo.example; keepalive_requests 1000; keepalive_timeout 60s; location / { access_log /tmp/nginx_access.log mirror; mirror /mirror; proxy_pass http://echo_upstream; proxy_http_version 1.1; proxy_set_header Connection ""; } location = /mirror { internal; access_log /tmp/nginx_mirror_access.log mirror; if ($mirror_servers) { proxy_pass http://$mirror_servers$request_uri; } } }

mirror_servers 也可以是域名，域名需要指定 dns nameserver：

...省略... split_clients "$date_gmt" $mirror_servers { # 50% record_upstream; 100% local.lijiaocn.com:9091; * ""; } ...省略... location = /mirror { internal; access_log off; #access_log /tmp/nginx_mirror_access.log mirror; resolver 114.114.114.114; if ($mirror_servers) { set $proxy_host $host; proxy_pass http://$mirror_servers$request_uri; } } ...省略... 参考李佶澳的博客 ngx_http_mirror_module

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nginx 请求复制

nginx 请求复制

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