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代理伺服器無法與後端伺服器連接

tag-icon • tag-icon apache-httpd reverse-proxy
代理伺服器無法與後端伺服器連接

我部署了在 Redhat 7.6 上運行的代理伺服器，並將 Apache 配置為反向代理伺服器。但是當我嘗試在反向代理伺服器日誌中的瀏覽器中開啟代理伺服器的 URL 時，它會給出此錯誤訊息

[Tue Jun 01 08:37:47.399377 2021] [proxy_http:error] [pid 130294] (103)Software caused connection abort: [client 192.168.xx.xxx:43702] AH01102: error reading status line from remote server msolarwinds:443
[Tue Jun 01 08:37:47.399514 2021] [proxy:error] [pid 130294] [client 192.168.xx.xx:43702] AH00898: Error reading from remote server returned by /

Solarwinds 作為後端運作。

反向代理虛擬主機

<VirtualHost *:80>                                                   
    ServerAdmin webmaster@domain                                 
    ServerName revproxy-01.domain                            
    ServerAlias revproxy-01                                      
    Redirect permanent / https://192.168.xxx.xxx                     
  #ProxyPass /Orion/ https://msolarwinds.domain:443/          
  #ProxyPassReverse /Orion/ https://msolarwinds.domain:443/   
    #ErrorLog "/var/log/httpd/reverseproxy-error_log"                
    #CustomLog "/var/log/httpd/reverseproxy-access_log" common       
</VirtualHost>                                                       
                                                                     
<VirtualHost *:443>                                                  
SSLEngine on                                                         
SSLProxyEngine on                                                    
SSLProtocol all -SSLv2 -SSLv3                                        
SSLProxyProtocol all -SSLv2 SSLv3                                    
#SSLProxyProtocol +TLSv1 -TLSv1.2 -SSLv2 -SSLv3                      
SSLCertificateFile /etc/pki/tls/certs/ca.crt                         
SSLCertificateKeyFile /etc/pki/tls/private/ca.key                    
    ServerAdmin webmaster@domain                                 
    ServerName revproxy-01.domain                            
    ServerAlias revproxy-01                                      
#<IfModule mod_proxy.c>                                              
#    <Proxy *>                                                       
#        Require all granted                                         
#    </Proxy>                                                        
    # backend server and forwarded path                              
    #SSLProxyCheckPeerCN off                                         
    #SSLProxyCheckPeerExpire off                                     
    #SSLProxyCheckPeerName off                                       
    #SSLProxyVerify none                                             
    #ProxyAddHeaders off                                             
                                                                     
    #ProxyRequests off                                               
    #ProxyVia off                                                    
    #ProxyPreserveHost on                                            
    #ProxyPass / https://172.16.xxx.xxx:443/ timeout=7200               
    ProxyPass / https://msolarwinds.domain:443/               
    ProxyPassReverse / https://msolarwinds.domain:443/        
    ErrorLog "/var/log/httpd/reverseproxy-error_log"                 
    CustomLog "/var/log/httpd/reverseproxy-access_log" common        
#</IfModule>                                                         
</VirtualHost>

如果我curl msolarwinds.domain:443在 RevProxy 伺服器上運行，它會回复

<!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML 2.0//EN">
<html><head>
<title>502 Proxy Error</title>
</head><body>
<h1>Proxy Error</h1>
<p>The proxy server received an invalid
response from an upstream server.<br />
The proxy server could not handle the request <em><a href="/">GET&nbsp;/</a></em>.<p>
Reason: <strong>Error reading from remote server</strong></p></p>
</body></html>

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