将会话数据存储在Memcache服务器上

Question

我在将会话数据存储在远程Memcache服务器上时遇到问题。 这是我得到的错误：

[Wed Dec 14 07:33:18 2016] [error] [client 192.168.247.235] PHP Warning:  Unknown: Failed to write session data (memcache). Please verify that the current setting of session.save_path is correct (tcp://192.168.247.111:11211) in Unknown on line 0

在同一台服务器上，如果我尝试使用telnet，它将起作用：

[root@centos ~]# telnet 192.168.247.111 11211
Trying 192.168.247.111...
Connected to 192.168.247.111.
Escape character is '^]'.
set test 0 100 3
xxx
STORED
get test
VALUE test 0 3
xxx
END

php.ini：

session.save_handler=memcache
session.save_path="tcp://192.168.247.111:11211"

当我在php.ini中使用memcached时，也会发生同样的事情：

session.save_handler=memcached
session.save_path="192.168.247.111:11211"

在error_log中只是更多信息

[Wed Dec 14 07:46:02 2016] [error] [client 192.168.247.235] PHP Warning:  session_start(): Write of lock failed in /var/www/html/sess.php on line 2
[Wed Dec 14 07:46:02 2016] [error] [client 192.168.247.235] PHP Warning:  session_start(): Unable to clear session lock record in /var/www/html/sess.php on line 2
[Wed Dec 14 07:46:02 2016] [error] [client 192.168.247.235] PHP Warning:  Unknown: Failed to write session data (memcached). Please verify that the current setting of session.save_path is correct (192.168.247.111:11211) in Unknown on line 0

php文件只有3行：

<?
session_start();
$_SESSION['somekey'] = "someval";
print_r($_SESSION);

Answer 1

经过几天的测试和搜索，我发现SElinux是问题所在。 禁用它后，一切开始起作用。