cluster-computing - 我使用 haproxy 作为 mariadb 集群的 banlancer，但在查询期间失去了连接

Question

我使用 haproxy 作为 mariadb galera 集群的 banlancer，它可以正常连接并执行一些操作，但几秒钟后我想再次执行一些搜索，但在查询错误期间丢失连接。请参阅下图的错误。

lost connection img

这是我的 haproxy.cfg

 defaults
        log                     global
        mode                    tcp
        option                  tcplog
        option                  dontlognull
        option http-server-close
        option                  redispatch
        retries                 3
        timeout http-request    10s
        timeout queue           1m
        timeout connect         10s
        timeout client          50000ms
        timeout server          50000ms
        timeout http-keep-alive 10s
        timeout check           10s
        maxconn                 3000

以及haproxy.cfg中mariadb集群的余额

listen mariadb_cluster_writes 0.0.0.0:50613    
    ## A failover pool for writes to ensure writes only hit one node at a time.
        mode tcp
        #option httpchk
        option tcpka
        option mysql-check user haproxy
        server node65 172.27.12.65:3306 check weight 2
        server node64 172.27.12.64:3306 check weight 1
        server node67 172.27.12.67:3306 check weight 1

    listen mariadb_cluster_reads 0.0.0.0:50614
    ## A load-balanced pool for reads to utilize all nodes for reads.
        mode tcp
        balance leastconn
        #option httpchk
        option tcpka
        option mysql-check user haproxy
        server node65 172.27.12.65:3306 check weight 1
        server node64 172.27.12.64:3306 check weight 1
        server node67 172.27.12.67:3306 check weight 1

有人知道吗？

Answer 1

我想我找到了原因。Haproxy本身有服务器和客户端的超时，我将服务器超时和客户端超时设置为与mysql超时相同，即8小时。现在看起来是这样:

defaults
        log                     global
        mode                    tcp
        option                  tcplog
        option                  dontlognull
        option http-server-close
        option                  redispatch
        retries                 3
        timeout http-request    10s
        timeout queue           1m
        timeout connect         10s
        timeout client          480m
        timeout server          480m
        timeout http-keep-alive 10s
        timeout check           10s
        maxconn                 3000

希望可以帮助别人。

但是我使用mariadb集群，它是master和master架构，所有节点都可以插入，所以我改变了haproxy.cfg，现在看起来像这样:

# Global settings
global
    log         127.0.0.1 local2
    maxconn     4000
    daemon

defaults
    log                     global
    mode                    tcp
    #option                  tcplog

    option                  dontlognull
    option                  tcp-smart-accept
    option                  tcp-smart-connect
    option                  redispatch
    retries                 3
    timeout connect         5s
    timeout client          480m
    timeout server          480m

listen admin_stats 
        bind 0.0.0.0:50613
        mode http                       
        maxconn 10
        stats refresh 30s              
        stats uri /stats               
        stats realm XingCloud\ Haproxy  
        stats auth admin:admin          


listen galera_back
        bind :50614
        balance leastconn
        server node65 172.27.12.65:3306 check weight 1
        server node64 172.27.12.64:3306 check weight 1
        server node67 172.27.12.67:3306 check weight 1