Apache ProxyPass 出现503 Service Temporarily Unavailable

在CentOS上配置Apache和Tomcat整合，因为之前windows已经配置好，所以httpd.conf就直接复制代码上去了。发现一直报错。

<VirtualHost *:80>
    #域名
    ServerName amap.jww.cn
    #DocumentRoot /var/www/catlog
    ErrorLog "/var/www/catlog/error.log"
    CustomLog "/var/www/catlog/common.log" common
    #反向代理Begin
    ProxyPass /images !
    ProxyPass /css !
    ProxyPass /js !
    #可多对
    ProxyPass / http://127.0.0.1:8080/
    ProxyPassReverse / http://127.0.0.1:8080/
    #反向代理END
</VirtualHost>

查看日志发现报错

Service Temporarily Unavailable

The server is temporarily unable to service your request due to maintenance downtime or capacity problems. Please try again later.

Apache/2.2.15 (CentOS) Server at amap.jww.cn Port 80

[Thu Jul 19 05:20:50 2012] [error] (13)Permission denied: proxy: HTTP: attempt to connect to 127.0.0.1:8080 (127.0.0.1) failed
[Thu Jul 19 05:20:50 2012] [error] ap_proxy_connect_backend disabling worker for (127.0.0.1)

问渡娘后得知是是SELinux的原因，httpd不能防问网络

[root@jwsz ~]# /usr/sbin/getsebool -a |grep httpd_can_network_connect
httpd_can_network_connect --> off
httpd_can_network_connect_cobbler --> off
httpd_can_network_connect_db --> off
[root@jwsz ~]#

更改SELinux设置

[root@jwsz ~]# /usr/sbin/setsebool -P httpd_can_network_connect=1
[root@jwsz ~]# /usr/sbin/getsebool -a |grep httpd_can_network_connect
httpd_can_network_connect --> on
httpd_can_network_connect_cobbler --> off
httpd_can_network_connect_db --> off
[root@jwsz ~]#

另外关掉SELinux也是可以解决这个问题修改/etc/selinux/config 然后重启：或者实时生效的方式：