rabbitMQ无法启动解决

========2018.09========

在按照某些blog的步骤安装rabbitMQ之后，不能启动rabbitMQ，尝试启动就报如下错误：

Error: unable to connect to node rabbit@588cab0040a2: nodedown

谷歌百度搜索得到两种原因，一种说法是cookie的问题，此问题是Windows平台，但我的系统是GUN/Linux；第二种说法是hostname的问题，虽然系统平台对应，但仍然不能解决问题，之后在rabbitMQ官网看到如下文档：

RabbitMq	Minimum required Erlang/OTP	Maximum  supported  Erlang/OTP	Notes
3.7.7	19.3.6.4	21.0.x	RabbitMQ 3.7.7 is the first version to support Erlang/OTP 21 Erlang/OTP 21 includes file I/O efficiency improvements For the best TLS support, the latest version of Erlang/OTP 21.0.x is recommended Versions prior to 19.3.6.4 have known bugs (e.g. ERL-430, ERL-448) that can prevent RabbitMQ nodes from accepting connections (including from CLI tools) and stopping Versions prior to 19.3.6.4 are vulnerable to the ROBOT attack (CVE-2017-1000385) On Windows, Erlang/OTP 20.2 changed default cookie file location
	19.3	20.3.x	For the best TLS support, the latest version of Erlang/OTP 20.3.x is recommended We recommend Erlang/OTP 19.3.6.4 or later, earlier versions have known bugs (e.g. ERL-430, ERL-448) that can prevent RabbitMQ nodes from accepting connections (including from CLI tools) and stopping Versions prior to 19.3.6.4 are vulnerable to the ROBOT attack (CVE-2017-1000385) On Windows, Erlang/OTP 20.2 changed default cookie file location
	19.3	20.3.x	For the best TLS support, the latest version of Erlang/OTP 20.3.x is recommended We recommend Erlang/OTP 19.3.6.4 or later, earlier versions have known bugs (e.g. ERL-430, ERL-448) that can prevent RabbitMQ nodes from accepting connections (including from CLI tools) and stopping Versions prior to 19.3.6.4 are vulnerable to the ROBOT attack (CVE-2017-1000385) Erlang/OTP versions prior to 19.3 are not supported On Windows, Erlang/OTP 20.2 changed default cookie file location
	R16B03	20.1.x	For the best TLS support, the latest version of Erlang/OTP 20.1.x is recommended We recommend Erlang/OTP 19.3.6.4 or later, earlier versions have known bugs (e.g. ERL-430, ERL-448) that can prevent RabbitMQ nodes from accepting connections (including from CLI tools) and stopping Versions prior to 19.3.6.4 are vulnerable to the ROBOT attack (CVE-2017-1000385)
	R16B03	19.3.x	For the best TLS support, the latest version of Erlang/OTP 19.3.x is recommended We recommend Erlang/OTP 19.3.6.4 or later, earlier versions have known bugs (e.g. ERL-430, ERL-448) that can prevent RabbitMQ nodes from accepting connections (including from CLI tools) and stopping Versions prior to 19.3.6.4 are vulnerable to the ROBOT attack (CVE-2017-1000385)
	R16B03	18.3.x	Erlang 18.x versions have known bugs (e.g. ERL-430, ERL-448) that can prevent RabbitMQ nodes from accepting connections (including from CLI tools) and stopping All Erlang versions supported by these releases are vulnerable to the ROBOT attack (CVE-2017-1000385)
	R14B04	17.5.x	RabbitMQ 3.5 was released 2015-03-11, and reached end of life 2017-09-11, we strongly discourage its use
	R13B03	16B03	RabbitMQ 3.4 was released 2014-10-21, and reached end of life 2017-05-31, we strongly discourage its use

========2018.09========

=======2021.03=========

docker中安装rabbit后尝试启动，报错

Error: unable to perform an operation on node 'rabbit@295b7b00bed0'. Please see diagnostics information and suggestions below. 

在/var/log/rabbitmq/startup_err中看到错误提示：

Error: This RabbitMQ version cannot run on Erlang 22.1.5 (erts 10.5.3): minimum required version is 22.3 (erts 10.7)

得知版本不匹配，按照要求安装22.3后解决

=======2021.03=========