Ask Your Question

Failed to launch instance "test": Please try again later [Error: No valid host was found. ]

asked 2015-03-15 14:52:10 -0500

aupres gravatar image

I try to make instance on openstack private cloud web UI. But it fails.The error code is

Failed to launch instance "test": Please try again later [Error: No valid host was found. ].

In /var/log/nova/nova-scheduler.log these errors are shown.

2015-03-16 03:32:26.824 1705 INFO oslo.messaging._drivers.impl_rabbit [req-50543fb4-b607-4b50-9578-6435600d516b ] Delaying reconnect for 1.0 seconds...
2015-03-16 03:32:27.825 1705 INFO oslo.messaging._drivers.impl_rabbit [req-50543fb4-b607-4b50-9578-6435600d516b ] Connecting to AMQP server on privatecloud:5672
2015-03-16 03:32:27.830 1705 ERROR oslo.messaging._drivers.impl_rabbit [req-50543fb4-b607-4b50-9578-6435600d516b ] AMQP server on privatecloud:5672 is unreachable: [Errno 111] ECONNREFUSED. Trying again in 30 seconds.

I think my configuration is something wrong. What do i have to do? Your advice will be deeply appreciated. Thanks

edit retag flag offensive close merge delete


Check password for AMQP in your nova config, also check if there is a problem with the connection(firewall blocking connections, selinux, etc)

Eduardo Gonzalez gravatar imageEduardo Gonzalez ( 2015-03-15 16:19:42 -0500 )edit

Pls, inform me of the property names of AMQP in my nova config which I have to check. I am afraid there are so property names in vova.conf file.

aupres gravatar imageaupres ( 2015-03-16 14:45:50 -0500 )edit

[DEFAULT] ... rpc_backend = rabbit rabbit_host = controller rabbit_password = RABBIT_PASS If you didn't changed the password when installed rabbitmq use "guest" as default password, check nova.conf in controller and compute node.

Eduardo Gonzalez gravatar imageEduardo Gonzalez ( 2015-03-16 15:43:31 -0500 )edit

I found this ref. "For RabbitMQ version 3.3.0 or newer, you must enable remote access for the guest account" so I made file like below

#vi /etc/rabbitmq/rabbitmq.config

[{rabbit, [{loopback_users, []}]}].

But the same error is thrown. I am using CentOS 7. anything i have to do ?

aupres gravatar imageaupres ( 2015-03-21 16:48:05 -0500 )edit

1 answer

Sort by ยป oldest newest most voted

answered 2015-03-21 18:39:26 -0500

aupres gravatar image

updated 2015-03-21 18:40:16 -0500

I solved it. I modified /etc/rabbitmq/rabbitmq.config like this ;

    {mnesia, [{dump_log_write_threshold, 1000}]},
    {rabbit, [{tcp_listeners, [5672]}]}

Then it is connected.

edit flag offensive delete link more

Your Answer

Please start posting anonymously - your entry will be published after you log in or create a new account.

Add Answer

Get to know Ask OpenStack

Resources for moderators

Question Tools

1 follower


Asked: 2015-03-15 14:52:10 -0500

Seen: 994 times

Last updated: Mar 15 '15