Haproxy路由和基于URI路径的重写

问题描述

我正在尝试设置Haproxy以在uri路径标识的一些后端上负载均衡请求.例如:

I am trying to setup an Haproxy to load balance requests on a few backends identified by the uri path. For example:

应该导致"catalog-v1"后端.

Should lead to the "catalog-v1" backends.

每个应用程序的响应路径都不相同，因此，我不仅必须识别该应用程序，还必须重写URL路径.例如

Thing is each app responds on a different path so I must not only identify the app but rewrite the URL path. E.g.

• https://www.example.com/v1/catalog/product
• https://www.example.com/v2-2/checkout/购物车/123
• https://www.example.com/v3.1.2/checkout/cart

• https://www.example.com/v1/catalog/product
• https://www.example.com/v2-2/checkout/cart/123
• https://www.example.com/v3.1.2/checkout/cart

TO

• https://www.example.com/catalog-v1/product
• https://www.example.com/checkout-v2-2/购物车/123
• https://www.example.com/checkout-v3.1.2/cart

• https://www.example.com/catalog-v1/product
• https://www.example.com/checkout-v2-2/cart/123
• https://www.example.com/checkout-v3.1.2/cart

我知道我不应该将Haproxy用于重写目的，但是现在这是不可避免的.

I know I shouldn't use Haproxy for rewriting purposes but for now this is inevitable.

尝试了以下可用于regex101的正则表达式:

Tried the following regex which worked on regex101:

([a-z.]*)\/([a-z0-9\-\.]*)\/([a-z\-]*)\/(.*)

替换:

\1/\3-\2/\4

最后是haproxy.config:

And finally here's the haproxy.config:

global
    daemon
    user root
    group root
    maxconn 256000
    log     127.0.0.1 local0
    log     127.0.0.1 local1 notice
    stats   socket /run/haproxy/stats.sock mode 777 level admin
defaults
    log      global
    option   dontlognull
    maxconn  4000
    retries  3
    timeout  connect 5s
    timeout  client  1m
    timeout  server  1m
    option   redispatch
    balance  roundrobin

listen stats :8088
    mode http
    stats enable
    stats uri /haproxy
    stats refresh 5s

backend catalog-v1
    mode http
    option httpchk GET /catalog-v1/ping
    http-check expect status 200
    reqrep ([a-z.]*)\/([a-z0-9\-\.]*)\/([a-z\-]*)\/(.*)   \1/\3-\2/\4
    server 127.0.0.1:8280_catalog-v1-node01 127.0.0.1:8280 check inter 2s rise 3 fall 2

backend checkout-v1
    mode http
    option httpchk GET /checkout-v1/ping
    http-check expect status 200
    reqrep ([a-z.]*)\/([a-z0-9\-\.]*)\/([a-z\-]*)\/(.*)   \1/\3-\2/\4
    server 127.0.0.1:8180_checkout-v1-node01 127.0.0.1:8180 check inter 2s rise 3 fall 2

frontend shared-frontend
    mode http
    bind localhost:80
    acl is-catalog-v1-path path_dir /v1/catalog
    acl is-checkout-v1-path path_dir /v1/checkout
    use_backend catalog-v1 if is-catalog-v1-path
    use_backend checkout-v1 if is-checkout-v1-path

我想念什么吗?

我已经为此苦苦挣扎了很长时间，但都没有成功.后端在Haproxy的统计信息页面中显示"UP"，但是每次我调用未重写的url"时，都会收到400错误的请求错误.

I've been struggling with this for quite some time without success. The backends shows "UP" in Haproxy stats page but everytime I call the "non rewrited url" I get a 400 Bad Request error.

提前感谢您的帮助！

推荐答案

如果我对您的理解正确，请替换以下示例:

If I understand you correctly, replace the example below:

reqrep ^([^\ ]\*)\ /([-.0-9A-Za-z]\*)/([a-zA-Z]\*)/(.\*)  \1\ /\3-\2/\4

http://cbonte.github.io/haproxy-dconv/configuration-1.5.html#reqrep

reqrep search string [{if | unless} cond]

您没有空格.

这篇关于Haproxy路由和基于URI路径的重写的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！