OSError: [Errno 13] Permission denied: '/var/lib/nova/tmp'

在centos7.3上安装newton，起openstack-nova-api.service 时报错

2017-07-12 15:45:03.062 3609 ERROR nova    do_log=False, semaphores=semaphores, delay=delay):

2017-07-12 15:45:03.062 3609 ERROR nova   File"/usr/lib64/python2.7/contextlib.py", line 17, in __enter__

2017-07-12 15:45:03.062 3609 ERROR nova    return self.gen.next()

2017-07-12 15:45:03.062 3609 ERROR nova   File"/usr/lib/python2.7/site-packages/oslo_concurrency/lockutils.py",line 216, in lock

2017-07-12 15:45:03.062 3609 ERROR nova    ext_lock.acquire(delay=delay)

2017-07-12 15:45:03.062 3609 ERROR nova   File"/usr/lib/python2.7/site-packages/fasteners/process_lock.py", line151, in acquire

2017-07-12 15:45:03.062 3609 ERROR nova    self._do_open()

2017-07-12 15:45:03.062 3609 ERROR nova   File"/usr/lib/python2.7/site-packages/fasteners/process_lock.py", line115, in _do_open

2017-07-12 15:45:03.062 3609 ERROR nova    made_basedir = _ensure_tree(basedir)

2017-07-12 15:45:03.062 3609 ERROR nova   File"/usr/lib/python2.7/site-packages/fasteners/process_lock.py", line37, in _ensure_tree

2017-07-12 15:45:03.062 3609 ERROR nova    os.makedirs(path)

2017-07-12 15:45:03.062 3609 ERROR nova   File"/usr/lib64/python2.7/os.py", line 157, in makedirs

2017-07-12 15:45:03.062 3609 ERROR nova    mkdir(name, mode)

2017-07-12 15:45:03.062 3609 ERROR novaOSError: [Errno 13] Permission denied: '/var/lib/nova/tmp'

2017-07-12 15:45:03.062 3609 ERROR nova

chomd -R 777 /var/lib/nova/
chown -R nova.nova /var/lib/nova/

报错还是一样。。

如果还是报同样的错，说明还是有问题。最好更改用户chown.下面的授权似乎也不对。
chown -R nova.nova /var/lib/nova/

问题解决了，应该是修改了/var/lib/nova的路径导致的，虽然权限改了，但是会报错，后来做了两次尝试，一个是直接把nova模块删除，重装nova问题解决，另一个是直接var/lib/nova做软链到别的路径，问题一样解决