openstack pike dashboard仪表盘无法登陆

郑全

问题现象 :

浏览器输入 http://controller/dashboard 访问仪表盘无法登陆，提示“出错啦！
遇到异常情况，请刷新。如需帮助请联系管理员。”


/var/log/httpd/error_log 中一直报以下错误:
... ...

[Wed Nov 01 06:36:08.539559 2017] [:error] [pid 16283]     self.create()
[Wed Nov 01 06:36:08.539566 2017] [:error] [pid 16283]   File "/usr/lib/python2.7/site-packages/django/contrib/sessions/backends/cache.py", line 48, in create
[Wed Nov 01 06:36:08.539569 2017] [:error] [pid 16283]     "Unable to create a new session key. "
[Wed Nov 01 06:36:08.539577 2017] [:error] [pid 16283] RuntimeError: Unable to create a new session key. It is likely that the cache is unavailable.
[Wed Nov 01 02:41:09.576741 2017] [mpm_prefork:notice] [pid 16278] AH00170: caught SIGWINCH, shutting down gracefully

解决办法:
   更改dashboard的local_settings配置文件并重启httpd和memcached，刷新后可正常登陆。
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# vim /etc/openstack-dashboard/local_settings #SESSION_ENGINE = 'django.contrib.sessions.backends.cache' SESSION_ENGINE = 'django.contrib.sessions.backends.file' # systemctl restart httpd memcached # systemctl status httpd memcached