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Unable to connect to AMQP server on controller:5672 after None tries:

Hello everyone, I started to install openstack from scratch. I have two nodes one controller and on compute node. I followed the documentation here : https://docs.openstack.org/nova/queens/install/compute-install-ubuntu.html

But the nova-compute service was unable to connect to AMQP server the error message is below.

Unable to connect to AMQP server on controller:5672 after None tries:ACCESS_REFUSED - Login was refused using authentication mechanism AMQPLAIN.

Thank you.

Unable to connect to AMQP server on controller:5672 after None tries:

Hello everyone, I started to install openstack from scratch. I have two nodes one controller and on compute node. I followed the documentation here : https://docs.openstack.org/nova/queens/install/compute-install-ubuntu.html

But the nova-compute service was unable to connect to AMQP server the error message is below.

ERROR oslo.messaging._drivers.impl_rabbit [req-3156f907-6d88-4be4-be2f-37fa8cca76da - - - - -] Unable to connect to AMQP server on controller:5672 after None tries:ACCESS_REFUSED - Login was refused using authentication mechanism AMQPLAIN.

Thank you.