解决Rabbitmq启动报“line 80: erl: command not found”

Posted 2020-12-03

问题描述:

部署一套新环境，因为该环境的机器规定不能连外网，rabbitmq采用离线部署的方式。
将本地yum下载的rabbitmq所需rpm包手动上传到该环境的机器离线部署。所有的rpm包都和本地在线安装都是一样的，本地测试机上部署和启动正常，但是在新环境机器上启动rabbitmq的时候出现了“/usr/lib/rabbitmq/bin/rabbitmq-server: line 80: erl: command not found”的报错。报错信息如下：

[[email protected] ~]# rabbitmq-server
/usr/lib/rabbitmq/bin/rabbitmq-server: line 80: erl: command not found
[[email protected] ~]#

分析过程：

1、根据报错说“erl: command not found”，就单独执行了一下erl，发现并没有什么问题：

[[email protected] ~]# erl
Erlang/OTP 19 [erts-8.3] [source] [64-bit] [smp:8:8] [async-threads:10] [hipe] [kernel-poll:false]

Eshell V8.3  (abort with ^G)
1>

2、查看了/etc/profile文件，看了一下配置的路径，也是和本地测试机实验的时候配置是一样的，路径什么的都是正确的，并没有配错误：

[[email protected] ~]# cat /etc/profile
# /etc/profile
......   #省略若干行
  export PATH=$PATH:/usr/local/erlang/bin
  export PATH=$PATH:/usr/lib/rabbitmq/bin
[[email protected] ~]#

3、试着直接执行报错的文档启动，发现是可以的，服务也能启动：

[[email protected] ~]# sh /usr/lib/rabbitmq/bin/rabbitmq-server

              RabbitMQ 3.6.12. Copyright (C) 2007-2017 Pivotal Software, Inc.
  ##  ##      Licensed under the MPL.  See http://www.rabbitmq.com/
  ##  ##
  ##########  Logs: /var/log/rabbitmq/[email protected]
  ######  ##        /var/log/rabbitmq/[email protected]
  ##########
              Starting broker...
 completed with 0 plugins.

那么启动执行的脚本可能不是这个脚本，所以想到替换一下启动脚本试试，或许有用。

解决过程：

1、找到rabbitmq-server命令执行的脚本的位置：

[[email protected] ~]# which rabbitmq-server
/sbin/rabbitmq-server
[[email protected] ~]#

2、比较两个文档，发现并不是同一个文件。于是把可以执行的/usr/lib/rabbitmq/bin/rabbitmq-server做软个连接到/sbin下面去替代原来执行报错的/sbin/rabbitmq-server文件：

[[email protected] sbin]# mv /sbin/rabbitmq-server /sbin/rabbitmq-server.bak
[[email protected] sbin]# ln -s /usr/lib/rabbitmq/bin/rabbitmq-server /sbin/rabbitmq-server

3、再次执行rabbitmq-server命令启动，发现还在报错：

[[email protected] sbin]# rabbitmq-server
/sbin/rabbitmq-server: line 22: /sbin/rabbitmq-env: No such file or directory
[[email protected] sbin]#

4、把报错缺少的文件rabbitmq-env再做一个软链接到/sbin下面：

[[email protected] sbin]# ln -s /usr/lib/rabbitmq/bin/rabbitmq-env /sbin/rabbitmq-env

5、再执行rabbitmq-server命令来启动服务，发现可以启动了：

[[email protected] sbin]# rabbitmq-server   #这种启动方法只能前台启动，Ctrl+c，进程就没了。所以在正式启动的时候我用的nohup rabbitmq-server >/dev/null 2>&1 & 这个命令启动

              RabbitMQ 3.6.12. Copyright (C) 2007-2017 Pivotal Software, Inc.
  ##  ##      Licensed under the MPL.  See http://www.rabbitmq.com/
  ##  ##
  ##########  Logs: /var/log/rabbitmq/[email protected]
  ######  ##        /var/log/rabbitmq/[email protected]
  ##########
              Starting broker...
 completed with 0 plugins.

然后查看进程，发现进程和端口号都已经起来了：

[[email protected] sbin]# ps -ef|grep rabbitmq
root     16778     1  0 Jul03 ?        00:32:36 /usr/local/erlang/lib/erlang/erts-8.3/bin/beam.smp -W w -A 128 -P 1048576 -t 5000000 -stbt db -zdbbl 128000 -K true -- -root /usr/local/erlang/lib/erlang -progname erl -- -home /root -- -pa /usr/lib/rabbitmq/lib/rabbitmq_server-3.6.12/ebin -noshell -noinput -s rabbit boot -sname [email protected] -boot start_sasl -config /etc/rabbitmq/rabbitmq -kernel inet_default_connect_options [{nodelay,true}] -sasl errlog_type error -sasl sasl_error_logger false -rabbit error_logger {file,"/var/log/rabbitmq/[email protected]"} -rabbit sasl_error_logger {file,"/var/log/rabbitmq/[email protected]"} -rabbit enabled_plugins_file "/etc/rabbitmq/enabled_plugins" -rabbit plugins_dir "/usr/lib/rabbitmq/plugins:/usr/lib/rabbitmq/lib/rabbitmq_server-3.6.12/plugins" -rabbit plugins_expand_dir "/var/lib/rabbitmq/mnesia/[email protected]" -os_mon start_cpu_sup false -os_mon start_disksup false -os_mon start_memsup false -mnesia dir "/var/lib/rabbitmq/mnesia/[email protected]" -kernel inet_dist_listen_min 25672 -kernel inet_dist_listen_max 25672 -noshell -noinput
root     27708 25767  0 09:12 pts/1    00:00:00 grep --color=auto rabbitmq
[[email protected] sbin]#
[[email protected] sbin]# netstat -tlunp|grep 15672
tcp        0      0 0.0.0.0:15672           0.0.0.0:*               LISTEN      16778/beam.smp
[[email protected] sbin]#

6、安装插件：

[[email protected] sbin]#  rabbitmq-plugins enable rabbitmq_management
The following plugins have been enabled:
  amqp_client
  cowlib
  cowboy
  rabbitmq_web_dispatch
  rabbitmq_management_agent
  rabbitmq_management

Applying plugin configuration to [email protected] started 6 plugins.
[[email protected] sbin]#
[[email protected] sbin]#

特别说明：
本文的这种解决方法，使用rabbitmq-server方法可以启动服务，但是使用另一种service rabbitmq-server start的方法启动，发现还是启动不了，会报这个错：

[[email protected] sbin]# service rabbitmq-server start
Starting rabbitmq-server (via systemctl):  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.
                                                           [FAILED]

查看报错详情：

[[email protected] sbin]# systemctl status rabbitmq-server.service
a— rabbitmq-server.service - LSB: Enable AMQP service provided by RabbitMQ broker
   Loaded: loaded (/etc/rc.d/init.d/rabbitmq-server; bad; vendor preset: disabled)
   Active: failed (Result: exit-code) since Tue 2018-07-03 11:26:58 CST; 22s ago
     Docs: man:systemd-sysv-generator(8)
  Process: 10985 ExecStart=/etc/rc.d/init.d/rabbitmq-server start (code=exited, status=1/FAILURE)

Jul 03 11:26:58 host1 systemd[1]: Starting LSB: Enable AMQP service provided by RabbitMQ broker...
Jul 03 11:26:58 host1 su[11076]: (to rabbitmq) root on none
Jul 03 11:26:58 host1 su[11208]: (to rabbitmq) root on none
Jul 03 11:26:58 host1 rabbitmq-server[10985]: Starting rabbitmq-server: FAILED - check /var/log/rabbitmq/startup_{log, _err}
Jul 03 11:26:58 host1 rabbitmq-server[10985]: rabbitmq-server.
Jul 03 11:26:58 host1 systemd[1]: rabbitmq-server.service: control process exited, code=exited status=1
Jul 03 11:26:58 host1 systemd[1]: Failed to start LSB: Enable AMQP service provided by RabbitMQ broker.
Jul 03 11:26:58 host1 systemd[1]: Unit rabbitmq-server.service entered failed state.
Jul 03 11:26:58 host1 systemd[1]: rabbitmq-server.service failed.
[[email protected] sbin]#

查看报错日志：

[[email protected] sbin]# cat /var/log/rabbitmq/startup_err
erlexec: HOME must be set
[[email protected] sbin]#

这个问题暂时还没找到怎么解决的方法，后续解决了再补上。

后记：
遇到报错“/usr/lib/rabbitmq/bin/rabbitmq-server: line 80: erl: command not found”，在网上查了很多解决方法，主要说法有两种：
1、在/usr/lib/rabbitmq/bin/rabbitmq-server文件的80行添加erl的环境变量；
2、修改/etc/profile修改环境变量，加上类似export HOME=/usr/lib/rabbitmq的配置
这两种方法都试过了，对我的问题不奏效，但记下来作为借鉴。