rabbitmq集群搭建报错：[error] Cookie file /var/lib/rabbitmq/.erlang.cookie must be accessible by owner only

1.背景描述

在创建rabbitmq集群时，需要将当前节点的.erlang.cookie文件数据修改为第一个节点的.erlang.cookie文件内容，这里为了防止手动vim修改导致数据末尾的自动换行符的引入，我使用了文件的直接替换，随后在重启当前的mq节点服务时，报错如下：

[root@net-test-leel ~]# service rabbitmq-server restart
Redirecting to /bin/systemctl restart rabbitmq-server.service
Job for rabbitmq-server.service failed because the control process exited with error code. See "systemctl status rabbitmq-server.service" and "journalctl -xe" for details.
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结果就是rabbitmq启动失败

[root@net-test-leel ~ rabbitmq]# service rabbitmq-server status
Redirecting to /bin/systemctl status rabbitmq-server.service
● rabbitmq-server.service - RabbitMQ broker
   Loaded: loaded (/usr/lib/systemd/system/rabbitmq-server.service; disabled; vendor preset: disabled)
   Active: activating (auto-restart) (Result: exit-code) since Wed 2023-02-15 03:14:13 CST; 8s ago
  Process: 32656 ExecStart=/usr/sbin/rabbitmq-server (code=exited, status=1/FAILURE)
 Main PID: 32656 (code=exited, status=1/FAILURE)
   Status: "Standing by"

Feb 15 03:14:13 qyyc01-test-ec2240001236.qyyc01.ksyun.com systemd[1]: Failed to start RabbitMQ broker.
Feb 15 03:14:13 qyyc01-test-ec2240001236.qyyc01.ksyun.com systemd[1]: Unit rabbitmq-server.service entered failed state.
Feb 15 03:14:13 qyyc01-test-ec2240001236.qyyc01.ksyun.com systemd[1]: rabbitmq-server.service failed.
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随后，执行reset时报错

[error] Cookie file /var/lib/rabbitmq/.erlang.cookie must be accessible by owner only
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2：问题解决

报错的内容是权限问题，当前这个文件只能文件的所有者才能访问，因为这个文件是从其他节点上复制并替换的，所以需要重新赋予权限，在rabbitmq的默认安装路径/var/lib/rabbitmq/下执行如下命令，

sudo chown rabbitmq:rabbitmq .erlang.cookie        
sudo chmod 400 .erlang.cookie
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随后，问题解决，可以正常启动mq了

[root@net-test-leel ~]# service rabbitmq-server restart
Redirecting to /bin/systemctl restart rabbitmq-server.service
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