在URL中使用ID通过HAProxy进行负载平衡 [英] Using ID in URL for load balancing with HAProxy

问题描述

我知道可以根据url使连接变为粘性参数: https://serverfault.com/questions/495049/using-url-parameters-for-load-balance-with-haproxy?utm_medium=organic&utm_source=google_rich_qa&utm_campaign=google_rich_qa

I know it is possible to make connections sticky based on url a parameter: https://serverfault.com/questions/495049/using-url-parameters-for-load-balancing-with-haproxy?utm_medium=organic&utm_source=google_rich_qa&utm_campaign=google_rich_qa

是否还可以根据网址路径中的ID进行操作?

Is it also possible to do it based on an ID in the url path?

如果我的网址是:/objects/:objectId

If my url is: /objects/:objectId

我可以以某种方式使用:objectId来使连接保持粘性吗?

Can I somehow use that :objectId to make the connection sticky?

编辑

我能够使用以下配置进行负载平衡，使请求在URL路径上保持粘性:

I was able to load balance making the request sticky on the url path using the configuration below:

global
    #daemon
    maxconn 256

defaults
    mode http
    timeout connect 5000ms
    timeout client 50000ms
    timeout server 50000ms

frontend http-in
    bind *:80
    default_backend servers

backend servers
    balance roundrobin
    stick-table type string size 200k expire 30m
    stick on path
    server server1 127.0.0.1:8000
    server server2 127.0.0.1:8001

listen stats
    bind 127.0.0.1:9000
    mode            http
    log             global

    maxconn 10

    stats enable
    stats hide-version
    stats refresh 5s
    stats show-node
    stats auth admin:password
    stats uri  /haproxy?stats

现在的问题是，如果其中一台服务器出现故障，则粘滞表不会更新.我该如何做到这一点，如果其中一台服务器无法访问，则指向该服务器的stick-table中的条目将被删除?

The problem now is that if one of the servers go down the stick-table is not updated. How can I make it so that if one of the servers is not reachable the entries in the stick-table that point to that server are deleted?

最终答案

好的，我能够弄清楚.下面的配置使请求停留在url路径上，并且HAProxy将每隔250ms向/health发送一次HTTP GET，如果它未返回200，它将认为服务器已关闭，并且将从该停留中删除所有条目，桌子.

Ok, I was able to figure that out. The configuration below makes the requests stick on the url path and HAProxy will make an HTTP GET to /health at every 250ms and if it doesn't returns 200 it will consider the server to be down and that will remove all entries from the stick-table.

global
    daemon
    maxconn 256

defaults
    mode http
    timeout connect 5000ms
    timeout client 50000ms
    timeout server 50000ms

frontend http-in
    bind *:80
    default_backend servers


backend servers
    balance roundrobin
    stick-table type string size 200k expire 30m
    option httpchk GET /health
    http-check expect status 200
    stick on path,word(2,/)  if { path_beg /objects/ }
    server server1 127.0.0.1:8000 check inter 250
    server server2 127.0.0.1:8001 check inter 250

listen stats
    bind 127.0.0.1:9000
    mode            http
    log             global

    maxconn 10

    stats enable
    stats hide-version
    stats refresh 5s
    stats show-node
    stats auth admin:password
    stats uri  /haproxy?stats

推荐答案

使用此:

stick on path,word(2,/)  if { path_beg /objects/ }

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