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[RabbitMQ]Error: unable to connect to node rabbit@compute1: nodedown(CentOS7.0)
今天在搭建OpenStack的时候需要安装RabbitMQ,可是使用yum install rabbitmq-server安装之后,按照OpenStack官方提供的文档修改guest用户密码的时候却出现了如下错误:
[root@controller ~]# rabbitmqctl change_password guest Rabbit123Changing password for user "guest" ...Error: unable to connect to node rabbit@controller: nodedownDIAGNOSTICS===========nodes in question: [rabbit@controller]hosts, their running nodes and ports:- controller: [{rabbitmqctl3435,40060}]current node details:- node name: rabbitmqctl3435@controller- home dir: /var/lib/rabbitmq- cookie hash: KkWnl06AR+v86hEhVTp8/g==[root@controller ~]#
殊不知,这并不是修改密码的命令除了问题,而是安装启动后就出现的问题。在启动服务后,在命令行输入:rabbitmqctl status,同样出现上述问题,如下:
[root@controller ~]# rabbitmqctl statusStatus of node rabbit@controller ...Error: unable to connect to node rabbit@controller: nodedownDIAGNOSTICS===========nodes in question: [rabbit@controller]hosts, their running nodes and ports:- controller: [{rabbitmqctl3560,54352}]current node details:- node name: rabbitmqctl3560@controller- home dir: /var/lib/rabbitmq- cookie hash: KkWnl06AR+v86hEhVTp8/g==[root@controller ~]#
网上有人说是hostname的问题,结果测试了一下发现不行呀。
解决方案:执行如下两条命令:
# /sbin/service rabbitmq-server stop
# /sbin/service rabbitmq-server start
# rabbitmqctl status 测试正确,结果如下:
[root@compute1 home]# /sbin/service rabbitmq-server stopRedirecting to /bin/systemctl stop rabbitmq-server.service[root@compute1 home]# /sbin/service rabbitmq-server startRedirecting to /bin/systemctl start rabbitmq-server.service[root@compute1 home]# rabbitmqctl statusStatus of node rabbit@compute1 ...[{pid,22133}, {running_applications,[{rabbit,"RabbitMQ","3.1.5"}, {os_mon,"CPO CXC 138 46","2.2.14"}, {mnesia,"MNESIA CXC 138 12","4.11"}, {xmerl,"XML parser","1.3.6"}, {sasl,"SASL CXC 138 11","2.3.4"}, {stdlib,"ERTS CXC 138 10","1.19.4"}, {kernel,"ERTS CXC 138 10","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.[root@compute1 home]#
再次输入修改密码命令:rabbitmqctl change_password guest Rabbit123成功
[root@controller ~]# rabbitmqctl change_password guest Rabbit123Changing password for user "guest" ......done.[root@controller ~]#
[RabbitMQ]Error: unable to connect to node rabbit@compute1: nodedown(CentOS7.0)
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