如何设置/使 Haproxy 根据 REST 方法发送读写请求

Question

如何设置/让 Haproxy 基于 REST 方法将来自应用程序的同一端口 5432 的读写请求发送到 postgres-patroni 集群的后端服务器。

我有三个节点的 postgres-patroni 集群作为 docker 服务/容器在 Haproxy 后面运行。我想将来自端口 5432 上的 my-application 的读取/获取请求发送到我的集群的副本，并将来自端口 5432 上的 my-application 的写入/(删除|发布|更新) 请求发送到主服务器。

我尝试使用以下配置来实现它。但目前还没有成功。

任何想法如何使 Haproxy 实现上述场景。

这是我的 Haproxy.cfg 文件

global
        maxconn 100

defaults
        log     global
        mode    tcp
        retries 2
        timeout client 30m
        timeout connect 4s
        timeout server 30m
        timeout check 5s
        # never fail on address resolution
        default-server init-addr none

resolvers docker_resolver
        nameserver dns 127.0.0.11:53
listen stats
    mode http
    bind *:7000
    stats enable
    stats uri /

frontend master_postgresql
        bind *:5432
        acl is_post method "POST|UPDATE|DELETE"
        use_backend backend_master if is_post
        default_backend backend_master

frontend replicas_postgresql
        bind *:5432
        acl is_get  method GET
        use_backend backend_replicas  if is_get
        default_backend backend_replicas

frontend patroni_api
        bind *:8008
        default_backend backend_api

backend backend_master
        balance source
        hash-type consistent
        option httpchk OPTIONS /master
        server postgres1 postgres1:5432 maxconn 100 check port 8008 resolvers docker_resolver resolve-prefer ipv4
        server postgres2 postgres2:5432 maxconn 100 check port 8008 resolvers docker_resolver resolve-prefer ipv4
        server postgres3 postgres3:5432 maxconn 100 check port 8008 resolvers docker_resolver resolve-prefer ipv4

backend backend_replicas
        option httpchk OPTIONS /replica
        server postgres1 postgres1:5432 maxconn 100 check port 8008 resolvers docker_resolver resolve-prefer ipv4
        server postgres2 postgres2:5432 maxconn 100 check port 8008 resolvers docker_resolver resolve-prefer ipv4
        server postgres3 postgres3:5432 maxconn 100 check port 8008 resolvers docker_resolver resolve-prefer ipv4

backend backend_api
        option httpchk OPTIONS /master
        server postgres1 postgres1:8008 maxconn 100 check port 8008 resolvers docker_resolver resolve-prefer ipv4
        server postgres2 postgres2:8008 maxconn 100 check port 8008 resolvers docker_resolver resolve-prefer ipv4
        server postgres3 postgres3:8008 maxconn 100 check port 8008 resolvers docker_resolver resolve-prefer ipv4