linux上应该怎样安装使用RabbitMQ

# Install from EPEL

[root@vdevops~]# yum --enablerepo=epel -y install rabbitmq-server

[root@vdevops~]# systemctl start rabbitmq-server

[root@vdevops /]# journalctl -xe

Nov 12 01:30:01 vdevops.org CROND[3856]: (root) CMD (/usr/lib64/sa/sa1 1 1)

Nov 12 01:30:04 vdevops.org rabbitmqctl[3831]: DIAGNOSTICS

Nov 12 01:30:04 vdevops.org rabbitmqctl[3831]: ===========

Nov 12 01:30:04 vdevops.org rabbitmqctl[3831]: attempted to contact: [rabbit@vdevops]

Nov 12 01:30:04 vdevops.org rabbitmqctl[3831]: rabbit@vdevops:

Nov 12 01:30:04 vdevops.org rabbitmqctl[3831]: * unable to connect to epmd (port 4369) on vdevops: timeout (timed out)

Nov 12 01:30:04 vdevops.org rabbitmqctl[3831]: current node details:

Nov 12 01:30:04 vdevops.org rabbitmqctl[3831]: - node name: rabbitmqctl3831@vdevops

Nov 12 01:30:04 vdevops.org rabbitmqctl[3831]: - home dir: /var/lib/rabbitmq

Nov 12 01:30:04 vdevops.org rabbitmqctl[3831]: - cookie hash: s++dDMtIhAufFItw+ercBw==

Nov 12 01:30:04 vdevops.org polkitd[1007]: Unregistered Authentication Agent for unix-process:3798:36632 (system bus name :1.23, object path /org/freedesktop/PolicyKit1/AuthenticationAgent, locale en_US.UTF-8) (disconnected f

Nov 12 01:30:04 vdevops.org systemd[1]: rabbitmq-server.service: control process exited, code=exited status=2

Nov 12 01:30:04 vdevops.org systemd[1]: Failed to start RabbitMQ broker.

-- Subject: Unit rabbitmq-server.service has failed

-- Defined-By: systemd

-- Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel

--

-- Unit rabbitmq-server.service has failed.

--

-- The result is failed.

Nov 12 01:30:04 vdevops.org systemd[1]: Unit rabbitmq-server.service entered failed state.

Nov 12 01:30:04 vdevops.org systemd[1]: rabbitmq-server.service failed.

Nov 12 01:30:42 vdevops.org systemd[1]: Got automount request for /proc/sys/fs/binfmt_misc, triggered by 3860 (find)

Nov 12 01:30:42 vdevops.org systemd[1]: Mounting Arbitrary Executable File Formats File System...

-- Subject: Unit proc-sys-fs-binfmt_misc.mount has begun start-up

-- Defined-By: systemd

-- Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel

--

-- Unit proc-sys-fs-binfmt_misc.mount has begun starting up.

Nov 12 01:30:42 vdevops.org systemd[1]: Mounted Arbitrary Executable File Formats File System.

-- Subject: Unit proc-sys-fs-binfmt_misc.mount has finished start-up

-- Defined-By: systemd

-- Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel

--

-- Unit proc-sys-fs-binfmt_misc.mount has finished starting up.

--

-- The start-up result is done.

rabbitmq-server启动报错：Failed to start RabbitMQ broker

度娘解析：主机hostname配置错误，原本hostname为vdevops.org,更改为vdevops，修改hosts文件中hostname设置

[root@vdevops /]# hostnamectl set-hostname vdevops # hostname更改重启启动rabbitmq-server

[root@vdevops /]# systemctl status rabbitmq-server

● rabbitmq-server.service - RabbitMQ broker

Loaded: loaded (/usr/lib/systemd/system/rabbitmq-server.servicedisabledvendor preset: disabled)

Active: active (running) since Sat 2016-11-12 01:32:41 CST3min 58s ago

Process: 3831 ExecStop=/usr/lib/rabbitmq/bin/rabbitmqctl stop (code=exited, status=2)

Main PID: 3891 (beam)

CGroup: /system.slice/rabbitmq-server.service

├─3891 /usr/lib64/erlang/erts-5.10.4/bin/beam -W w -K true -A30 -P 1048576 -- -root /usr/lib64/erlang -progname erl -- -home /var/lib/rabbitmq -- -pa /usr/lib/rabbitmq/lib/rabbitmq_server-3.3.5/sbin/../ebin -nos...

├─3908 /usr/lib64/erlang/erts-5.10.4/bin/epmd -daemon

├─3963 inet_gethost 4

└─3964 inet_gethost 4

Nov 12 01:32:39 vdevops systemd[1]: Starting RabbitMQ broker...

Nov 12 01:32:39 vdevops systemd[1]: rabbitmq-server.service: Got notification message from PID 3908, but reception only permitted for main PID 3891

Nov 12 01:32:40 vdevops rabbitmq-server[3891]: RabbitMQ 3.3.5. Copyright (C) 2007-2014 GoPivotal, Inc.

Nov 12 01:32:40 vdevops rabbitmq-server[3891]: ## ## Licensed under the MPL. See http://www.rabbitmq.com/

Nov 12 01:32:40 vdevops rabbitmq-server[3891]: ## ##

Nov 12 01:32:40 vdevops rabbitmq-server[3891]: ########## Logs: /var/log/rabbitmq/rabbit@vdevops.log

Nov 12 01:32:40 vdevops rabbitmq-server[3891]: ###### ##/var/log/rabbitmq/rabbit@vdevops-sasl.log

Nov 12 01:32:40 vdevops rabbitmq-server[3891]: ##########

Nov 12 01:32:41 vdevops systemd[1]: Started RabbitMQ broker.

Nov 12 01:32:41 vdevops rabbitmq-server[3891]: Starting broker... completed with 0 plugins.

[root@vdevops~]# systemctl enable rabbitmq-server

Created symlink from /etc/systemd/system/multi-user.target.wants/rabbitmq-server.service to /usr/lib/systemd/system/rabbitmq-server.service.

防火墙设置

[root@linuxprobe~]# firewall-cmd --add-port=5672/tcp --permanent

success

[root@linuxprobe~]# firewall-cmd --reload

success

要使用RabbitMQ，请先添加用户

[root@vdevops ~]# rabbitmqctl add_user linuxprobe password

Creating user "linuxprobe" ...

...done.

[root@vdevops ~]# rabbitmqctl list_users

Listing users ...

guest [administrator]

linuxprobe []

...done.

# granting admin role to a user is like follows

[root@vdevops ~]# rabbitmqctl change_password linuxprobe strongpassword

Changing password for user "linuxprobe" ...

...done.

# granting admin role to a user is like follows

[root@vdevops ~]# rabbitmqctl set_user_tags linuxprobe administrator

Setting tags for user "linuxprobe" to [administrator] ...

...done.

# deleting a user is like follows

[root@vdevops ~]# rabbitmqctl delete_user linuxprobe

Deleting user "linuxprobe " ...

...done.

要使用RabbitMQ，也要添加虚拟主机

[root@vdevops ~]# rabbitmqctl add_vhost /my_vhost

Creating vhost "/my_vhost" ...

...done.

[root@vdevops ~]# rabbitmqctl list_vhosts

Listing vhosts ...

/

/my_vhost

...done.

[root@vdevops ~]# rabbitmqctl delete_vhost /my_vhost

Deleting vhost "/my_vhost" ...

...done.

给虚拟主机的用户授予权限，请如下配置

# rabbitmqctl set_permissions [-p vhost] [user] [permission ? (modify) (write) (read)]

[root@vdevops ~]# rabbitmqctl set_permissions -p /my_vhost linuxprobe ".*" ".*" ".*"

Setting permissions for user "linuxprobe" in vhost "/my_vhost" ...

...done.

#

[root@vdevops ~]# rabbitmqctl list_user_permissions linuxprobe

Listing permissions for user "linuxprobe" ...

/my_vhost .* .* .*

...done.

# deleting permission of a specific user is like follows

[root@vdevops ~]# rabbitmqctl clear_permissions -p /my_vhost linuxprobe

Clearing permissions for user "linuxprobe" in vhost "/my_vhost" ...

...done.

这篇是在CentOS上部署RabbitMQhttp://www.linuxprobe.com/centos-deploy-rabbitmq.html，你可以看一下！

linux启动app命令：做 Linux 嵌入式开发，经常会遇到要设置自己的应用程序在系统开机的时候自动启动，并且一般情况我们不想安装一些额外的软件去实现此种需求。那么直接根据当前系统自带的默认的一些工具实现用户软件的开机自启动。

  本次测验的系统环境为 Ubuntu 16.04 LTS，测试内容均得到正确的验证，如果其他环境出现不一致的现象，请查阅相关的差异。

  比如先要实现下面的应用程序的开机自启动（实现的代码最下面给出，有需要的可以查看）：

1. 应用程序的名称：app.bin

2. 应用程序的保存路径：/home/ubuntu/app/ 下

3. 应用程序的工作路径：/home/ubuntu/app/ 下

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