RuntimeError: Unable to create a new session key. It is likely that the cache is unavailable.

使用Centos7.6安装的Stein版本，按照官方文档一步步安装Dashboard，输入用户名和密码后出错，如下所示

 查看apache日志/var/log/httpd/error_log，发现以下错误

[root@controller ~]# tail -f /var/log/httpd/error_log
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[Tue Nov 29 16:23:44.169239 2022] [:error] [pid 21120]     "Unable to create a new session key. "
[Tue Nov 29 16:23:44.169242 2022] [:error] [pid 21120] RuntimeError: Unable to create a new session key. It is likely that the cache is unavailable.

 

 解决方法

1、修改配置文件

[root@controller ~]# vi /etc/openstack-dashboard/local_settings

 

2、将SESSION_ENGINE值修改

原

SESSION_ENGINE = 'django.contrib.sessions.backends.cache'

 

改为

SESSION_ENGINE = 'django.contrib.sessions.backends.file'

 

3、重启服务，然后再次登录。

[root@controller ~]# systemctl restart httpd.service memcached.service

 

参考博客：

https://blog.csdn.net/jack170601/article/details/76910997