[RabbitMQ] Error:unable to connect to node Rabbit@compute1:nodedown (CentOS7.0)

Today, when building OpenStack, you need to install RABBITMQ, but after installing rabbitmq-server with Yum Install, the following error occurred while modifying the guest user password according to the official OpenStack documentation:

[[Email protected] ~]# rabbitmqctl Change_password guest rabbit123changing password forUser"Guest" ... error:unable to connect to node [email protected]: Nodedown Diagnostics===========nodesinchquestion: [[email protected]]hosts, their running nodes and ports:-Controller: [{rabbitmqctl3435,40060}]current node Details:-node Name: [Email protected]-Homedir:/var/lib/RABBITMQ-Cookie hash:kkwnl06ar+v86hehvtp8/g==[[Email protected]~]#

As everyone knows, this is not the command to change the password in addition to the problem, but the installation after the start of the problem. After starting the service, at the command-line input:rabbitmqctl status, the same problem occurs as follows:

[Email protected] ~]# rabbitmqctl statusstatus of node [email protected] ... error:unable to connect to node [email protected]: Nodedown Diagnostics===========  in question: [[email protected]]hosts, their running nodes and ports: -Controller: [{rabbitmqctl3560,54352}]current node Details:- node name: [Email protected]< /c7>dir:/var/lib/rabbitmq-Cookie hash:kkwnl06ar+v86hehvtp8/g==

Some people on the internet said it was a hostname problem, and it turned out to be a test.

　　Solution: Execute the following two commands:

#/sbin/service Rabbitmq-server Stop
#/sbin/service Rabbitmq-server Start
# RABBITMQCTL status tested correctly with the following results:

[Email protected] home]#/sbin/service rabbitmq-Server stopredirecting to/bin/systemctl Stop rabbitmq-Server.service[[email protected] home]#/sbin/service rabbitmq-Server startredirecting to/bin/systemctl Start rabbitmq-Server.service[[email protected] home]# rabbitmqctl statusstatus of node [email protected] ... [{PID,22133}, {running_applications,[{rabbit,"RabbitMQ","3.1.5"}, {Os_mon,"CPO CXC 138","2.2.14"}, {Mnesia,"MNESIA CXC 138","4.11"}, {Xmerl,"XML Parser","1.3.6"}, {SASL,"SASL CXC 138","2.3.4"}, {stdlib,"ERTS CXC 138","1.19.4"}, {kernel,"ERTS CXC 138","2.16.4"}]}, {Os,{unix,linux}}, {erlang_version,"Erlang r16b03-1 (erts-5.10.4) [source] [64-bit] [smp:6:6] [async-threads:30] [hipe] [kernel-poll:true]\n"}, {memory,[{total,36056032}, {Connection_procs,2800}, {Queue_procs,5600}, {plugins,0}, {other_proc,13586448}, {Mnesia,59920}, {mgmt_db,0}, {msg_index,22280}, {other_ets,739304}, {binary,7880}, {code,16441504}, {atom,594537}, {Other_system,4595759}]}, {Vm_memory_high_watermark,0.4}, {vm_memory_limit,6663997030}, {disk_free_limit,1000000000}, {disk_free,82596229120}, {file_descriptors,[{total_limit,924}, {total_used,3}, {sockets_limit,829}, {sockets_used,1}]}, {processes,[{limit,1048576},{used,127}]}, {run_queue,0}, {Uptime,7}]... Done. [Email protected] home]#

Re-enter the Change Password command:rabbitmqctl Change_password guest Rabbit123 Success

[Email protected] ~ for"guest"   ...  Done

[RabbitMQ] Error:unable to connect to node [email protected]: Nodedown (CentOS7.0)