AccssRefused: (0, 0): (403) ACCESS_REFUSED - Login was refused using authentication mechanism AMQPL_amqp.exceptions.accessrefused: (0, 0): (403) acces

今天装openstack，中途重启下机器，装到nova的时候，无法启动 openstack-nova-compute.service服务。报错如下：

[root@venus nova]# journalctl -xe
-- Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel
-- 
-- Unit openstack-nova-compute.service has begun starting up.
10月 15 11:42:11 venus systemd[1]: openstack-nova-compute.service: main process exited, code=exited, status=1/FAILURE
10月 15 11:42:11 venus systemd[1]: Failed to start OpenStack Nova Compute Server.
-- Subject: Unit openstack-nova-compute.service has failed
-- Defined-By: systemd
-- Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel
-- 
-- Unit openstack-nova-compute.service has failed.
-- 
-- The result is failed.
10月 15 11:42:11 venus systemd[1]: Unit openstack-nova-compute.service entered failed state.
10月 15 11:42:11 venus systemd[1]: openstack-nova-compute.service failed.
10月 15 11:42:11 venus systemd[1]: openstack-nova-compute.service holdoff time over, scheduling restart.
10月 15 11:42:11 venus systemd[1]: Stopped OpenStack Nova Compute Server.
-- Subject: Unit openstack-nova-compute.service has finished shutting down
-- Defined-By: systemd
-- Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel
-- 
-- Unit openstack-nova-compute.service has finished shutting down.
10月 15 11:42:11 venus systemd[1]: Starting OpenStack Nova Compute Server...
-- Subject: Unit openstack-nova-compute.service has begun start-up
-- Defined-By: systemd
-- Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel
-- 
-- Unit openstack-nova-compute.service has begun starting up.

查看nova-computer.log文件

2019-10-15 11:43:08.817 21429 ERROR oslo_service.service     self.connection.ensure_connection(errback=on_error)
2019-10-15 11:43:08.817 21429 ERROR oslo_service.service   File "/usr/lib/python2.7/site-packages/kombu/connection.py", line 405, in ensure_connection
2019-10-15 11:43:08.817 21429 ERROR oslo_service.service     callback)
2019-10-15 11:43:08.817 21429 ERROR oslo_service.service   File "/usr/lib/python2.7/site-packages/kombu/utils/functional.py", line 332, in retry_over_time
2019-10-15 11:43:08.817 21429 ERROR oslo_service.service     return fun(*args, **kwargs)
2019-10-15 11:43:08.817 21429 ERROR oslo_service.service   File "/usr/lib/python2.7/site-packages/kombu/connection.py", line 261, in connect
2019-10-15 11:43:08.817 21429 ERROR oslo_service.service     return self.connection
2019-10-15 11:43:08.817 21429 ERROR oslo_service.service   File "/usr/lib/python2.7/site-packages/kombu/connection.py", line 802, in connection
2019-10-15 11:43:08.817 21429 ERROR oslo_service.service     self._connection = self._establish_connection()
2019-10-15 11:43:08.817 21429 ERROR oslo_service.service   File "/usr/lib/python2.7/site-packages/kombu/connection.py", line 757, in _establish_connection
2019-10-15 11:43:08.817 21429 ERROR oslo_service.service     conn = self.transport.establish_connection()
2019-10-15 11:43:08.817 21429 ERROR oslo_service.service   File "/usr/lib/python2.7/site-packages/kombu/transport/pyamqp.py", line 130, in establish_connection
2019-10-15 11:43:08.817 21429 ERROR oslo_service.service     conn.connect()
2019-10-15 11:43:08.817 21429 ERROR oslo_service.service   File "/usr/lib/python2.7/site-packages/amqp/connection.py", line 313, in connect
2019-10-15 11:43:08.817 21429 ERROR oslo_service.service     self.drain_events(timeout=self.connect_timeout)
2019-10-15 11:43:08.817 21429 ERROR oslo_service.service   File "/usr/lib/python2.7/site-packages/amqp/connection.py", line 500, in drain_events
2019-10-15 11:43:08.817 21429 ERROR oslo_service.service     while not self.blocking_read(timeout):
2019-10-15 11:43:08.817 21429 ERROR oslo_service.service   File "/usr/lib/python2.7/site-packages/amqp/connection.py", line 506, in blocking_read
2019-10-15 11:43:08.817 21429 ERROR oslo_service.service     return self.on_inbound_frame(frame)
2019-10-15 11:43:08.817 21429 ERROR oslo_service.service   File "/usr/lib/python2.7/site-packages/amqp/method_framing.py", line 55, in on_frame
2019-10-15 11:43:08.817 21429 ERROR oslo_service.service     callback(channel, method_sig, buf, None)
2019-10-15 11:43:08.817 21429 ERROR oslo_service.service   File "/usr/lib/python2.7/site-packages/amqp/connection.py", line 510, in on_inbound_method
2019-10-15 11:43:08.817 21429 ERROR oslo_service.service     method_sig, payload, content,
2019-10-15 11:43:08.817 21429 ERROR oslo_service.service   File "/usr/lib/python2.7/site-packages/amqp/abstract_channel.py", line 126, in dispatch_method
2019-10-15 11:43:08.817 21429 ERROR oslo_service.service     listener(*args)
2019-10-15 11:43:08.817 21429 ERROR oslo_service.service   File "/usr/lib/python2.7/site-packages/amqp/connection.py", line 639, in _on_close
2019-10-15 11:43:08.817 21429 ERROR oslo_service.service     (class_id, method_id), ConnectionError)
2019-10-15 11:43:08.817 21429 ERROR oslo_service.service AccessRefused: (0, 0): (403) ACCESS_REFUSED - Login was refused using authentication mechanism AMQPLAIN. For details see the broker logfile.

通过查看反复出现的错误:

AccessRefused: (0, 0): (403) ACCESS_REFUSED - Login was refused using authentication mechanism AMQPLAIN. For details see the broker logfile.

解决方法是rabbitmq-server.service服务异常，先使用命令 rabbitmqctl status查看，如果异常输出，就重新安装rabbitmqctl，重新创建用户。如果正常输出，如下：

[root@venus nova]# rabbitmqctl status
Status of node rabbit@venus
[{pid,1989},
 {running_applications,
     [{rabbit,"RabbitMQ","3.6.16"},
      {mnesia,"MNESIA  CXC 138 12","4.14.3"},
      {ranch,"Socket acceptor pool for TCP protocols.","1.3.2"},
      {rabbit_common,
          "Modules shared by rabbitmq-server and rabbitmq-erlang-client",
          "3.6.16"},
      {xmerl,"XML parser","1.3.14"},
      {ssl,"Erlang/OTP SSL application","8.1.3.1"},
      {os_mon,"CPO  CXC 138 46","2.4.2"},
      {compiler,"ERTS  CXC 138 10","7.0.4.1"},
      {public_key,"Public key infrastructure","1.4"},
      {crypto,"CRYPTO","3.7.4"},
      {syntax_tools,"Syntax tools","2.1.1"},
      {asn1,"The Erlang ASN1 compiler version 4.0.4","4.0.4"},
      {recon,"Diagnostic tools for production use","2.3.2"},
      {sasl,"SASL  CXC 138 11","3.0.3"},
      {stdlib,"ERTS  CXC 138 10","3.3"},
      {kernel,"ERTS  CXC 138 10","5.2"}]},
 {os,{unix,linux}},
 {erlang_version,
     "Erlang/OTP 19 [erts-8.3.5.3] [source] [64-bit] [smp:32:32] [async-threads:512] [hipe] [kernel-poll:true]\n"},
 {memory,
     [{connection_readers,2772584},
      {connection_writers,156680},
      {connection_channels,794696},
      {connection_other,5333856},

则只需要重新创新用户，如果出现这个错误就是rabbitmq服务的事情。