今天在搭建OpenStack的時候需要安裝RabbitMQ，可是使用yum install rabbitmq-server安裝之後，按照OpenStack官方提供的文件修改guest使用者密碼的時候卻出現瞭如下錯誤：
[[email protected] ~]# rabbitmqctl change_password guest Rabbit123 Changing password for user "guest" ... Error: unable to connect to node [email protected]: nodedown DIAGNOSTICS=========== nodes in question: [[email protected]] hosts, their running nodes and ports: - controller: [{rabbitmqctl3435,40060}] current node details: - node name: [email protected] - home dir: /var/lib/rabbitmq - cookie hash: KkWnl06AR+v86hEhVTp8/g== [[email protected] ~]#
殊不知，這並不是修改密碼的命令除了問題，而是安裝啟動後就出現的問題。在啟動服務後，在命令列輸入：rabbitmqctl status
[[email protected] ~]# rabbitmqctl status Status of node [email protected] ... Error: unable to connect to node [email protected]: nodedown DIAGNOSTICS =========== nodes in question: [[email protected]] hosts, their running nodes and ports: - controller: [{rabbitmqctl3560,54352}] current node details: - node name: [email protected] - home dir: /var/lib/rabbitmq - cookie hash: KkWnl06AR+v86hEhVTp8/g== [[email protected] ~]#
網上有人說是hostname的問題，結果測試了一下發現不行呀。
解決方案：執行如下兩條命令：
# /sbin/service rabbitmq-server stop
# /sbin/service rabbitmq-server start
# rabbitmqctl status 測試正確，結果如下：
[[email protected] home]# /sbin/service rabbitmq-server stop Redirecting to /bin/systemctl stop rabbitmq-server.service [[email protected] home]# /sbin/service rabbitmq-server start Redirecting to /bin/systemctl start rabbitmq-server.service [[email protected] home]# rabbitmqctl status Status of node [email protected] ... [{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. [[email protected] home]#
再次輸入修改密碼命令：rabbitmqctl change_password guest Rabbit123成功
[[email protected] ~]# rabbitmqctl change_password guest Rabbit123 Changing password for user "guest" ... ...done. [[email protected] ~]#