According to message: var/log/neutron/server.log 2014-11-24 10:56:09.019 6894 ERROR oslo.messaging._drivers.impl_rabbit [-] AMQP server on controller:5672 is unreachable: [Errno 111] ECONNREFUSED. Trying again in 17 seconds. 2014-11-24 10:56:26.032 6894 INFO oslo.messaging._drivers.impl_rabbit [-] Delaying

You have issues with connection to rabbitmmq-server on Controller
Make sure ( on RH systems ), first :

[root@juno1 ~(keystone_admin)]# systemctl status rabbitmq-server
rabbitmq-server.service - RabbitMQ broker
   Loaded: loaded (/usr/lib/systemd/system/rabbitmq-server.service; enabled)
   Active: active (running) since Mon 2014-11-24 08:00:11 MSK; 3h 15min ago
  Process: 2969 ExecStartPost=/usr/lib/rabbitmq/bin/rabbitmqctl wait /var/run/rabbitmq/pid (code=exited, status=0/SUCCESS)
  Process: 1566 ExecStartPre=/bin/sh -c /usr/lib/rabbitmq/bin/rabbitmqctl status > /dev/null 2>&1 (code=exited, status=2)
 Main PID: 2968 (beam.smp)
   CGroup: /system.slice/rabbitmq-server.service
           ├─2968 /usr/lib64/erlang/erts-5.10.4/bin/beam.smp -W w -K true -A30 -P 1048576 -- -root /us...
           ├─5227 inet_gethost 4
           └─5228 inet_gethost 4

Second

[root@juno1 ~(keystone_admin)]# netstat -lnpt | grep 5672
tcp6       0      0 :::5672                 :::*                    LISTEN      2968/beam.smp       
[root@juno1 ~(keystone_admin)]# ps -ef | grep 2968
rabbitmq  2968     1  0 07:59 ?        00:01:12 /usr/lib64/erlang/erts-5.10.4/bin/beam.smp -W w -K true -A30 -P 1048576 -- -root /usr/lib64/erlang -progname erl -- -home /var/lib/rabbitmq -- -pa /usr/lib/rabbitmq/lib/rabbitmq_server-3.1.5/sbin/../ebin -noshell -noinput -s rabbit boot -sname rabbit@juno1 -boot start_sasl -config /etc/rabbitmq/rabbitmq -kernel inet_default_connect_options [{nodelay,true}] -rabbit tcp_listeners [{"auto",5672}] -sasl errlog_type error -sasl sasl_error_logger false -rabbit error_logger {file,"/var/log/rabbitmq/rabbit@juno1.log"} -rabbit sasl_error_logger {file,"/var/log/rabbitmq/rabbit@juno1-sasl.log"} -rabbit enabled_plugins_file "/etc/rabbitmq/enabled_plugins" -rabbit plugins_dir "/usr/lib/rabbitmq/lib/rabbitmq_server-3.1.5/sbin/../plugins" -rabbit plugins_expand_dir "/var/lib/rabbitmq/mnesia/rabbit@juno1-plugins-expand" -os_mon start_cpu_sup false -os_mon start_disksup false -os_mon start_memsup false -mnesia dir "/var/lib/rabbitmq/mnesia/rabbit@juno1"
rabbitmq  5227  2968  0 08:00 ?        00:00:00 inet_gethost 4
root     17790  8414  0 11:16 pts/0    00:00:00 grep --color=auto 2968

You have to have rabbitmq-server running on Controller && port 5672 opened
On Ubuntu Controller troubleshooting rabbitmq follow :
https://ask.openstack.org/en/question...

First I would suggest you to verify the 'RabbitMQ status' and make sure that all OpenStack nodes are able to ping/connect with RabbitMQ server.

To verify if RabbitMQ service is running on your rabbit server, run below command : -

#systemctl status rabbitmq-server.service -l

or

#service rabbitmq-server status

To verify the RabbitMQ server status run the below command: -

#rabbitmqctl status

This command should print a detailed output of various information related to AMQP server. If the status is good then you need to make sure that rabbitmq port is allowed to make connection between your openstack nodes through firewall.

On RabbitMQ server you may run the below command to check if your compute node is able to establish connection with rabbit server:-

   # lsof -i :5672|grep 'compute_node_ip'

Make sure that there is no time lag between your openstack node, all the nodes should be synced with a central server time using NTP.

@Eric Xie,

Yet not created this neutron service on any server I just stucked at compute server.

BR, Kishore

hi, 1) check /var/log/neutron/server.log if errors exist; 2) python /usr/bin/neutron-server --debug --config-file /usr/share/neutron/neutron-dist.conf --config-file /etc/neutron/neutron.conf --config-file /etc/neutron/plugin.ini --log-file /var/log/neutron/server.log. Check if errors exist. wish help~

I had some problems starting neutron-server.service on OSP 13 it was some added lines by me on plugin.ini and neutron.conf , I removed it and it went smooth to start, ironic is installed too so I have to check now if commands run and Horizon stops sending error messages