54. emqx

emqx编译安装.emqx是一个MQTT消息服务器

54.1. 1、编译安装Erlang

emqx 依赖Erlang，需要先编译安装Erlang

首先安装依赖

yum grouplist
yum groupinstall "Development Tools"

再安装Erlang

git clone https://github.com/erlang/otp.git
cd otp
git checkout -b OTP-22.0.7-build OTP-22.0.7
./otp_build autoconf
./configure
make
sudo make install

configure 报错请依次安装依赖包。参考问题列表。

sudo make install 成功会提示：

erlang.mk:30: Please upgrade to GNU Make 4 or later: https://erlang.mk/guide/installation.html
 ERLC   ELDAPv3.erl eldap2.erl
 APP    eldap2.app.src
make[1]: Leaving directory `/home/me/emqx-rel/_build/emqx/lib/eldap2`
===> Compiling emqx_auth_ldap
===> Starting relx build process ...
===> Resolving OTP Applications from directories:
          /home/me/emqx-rel/_build/emqx/lib
          /home/me/emqx-rel/_checkouts
          /usr/local/lib/erlang/lib
===> Resolved emqx-v3.2-beta.1-42-g663aee6
===> Including Erts from /usr/local/lib/erlang
===> release successfully created!
[me@centos emqx-rel]$
[me@centos emqx-rel]$

54.2. 2. 编译安装emqx

git clone https://github.com/emqx/emqx-rel.git
cd emqx-rel
git checkout -b v3.2.2_build v3.2.2
cd emqx-rel && make
cd _build/emqx/rel/emqx && ./bin/emqx console

make 过程会fetch众多来自github的依赖包。Fetching不能失败，以避免编译后的emqx不能运行

[2019-08-12 19:34:00]                           {branch,"master"}})
[2019-08-12 19:34:00]  ===> Fetching emqx_auth_ldap (from {git,"https://github.com/emqx/emqx-auth-ldap",
[2019-08-12 19:34:07]                            {branch,"master"}})
[2019-08-12 19:34:07]  ===> Fetching emqx_auth_mongo (from {git,"https://github.com/emqx/emqx-auth-mongo",
[2019-08-12 19:34:13]                             {branch,"master"}})
[2019-08-12 19:34:13]  ===> Fetching emqx_auth_mysql (from {git,"https://github.com/emqx/emqx-auth-mysql",
[2019-08-12 19:34:18]                             {branch,"master"}})
[2019-08-12 19:34:18]  ===> Fetching emqx_auth_pgsql (from {git,"https://github.com/emqx/emqx-auth-pgsql",
[2019-08-12 19:34:23]                             {branch,"master"}})
[2019-08-12 19:34:23]  ===> Fetching emqx_auth_redis (from {git,"https://github.com/emqx/emqx-auth-redis",
[2019-08-12 19:34:29]                             {branch,"master"}})
[2019-08-12 19:34:29]  ===> Fetching emqx_auth_username (from {git,"https://github.com/emqx/emqx-auth-username",

console执行成功会有如下提示： image0 打开web界面无报错 image1

54.3. 遇到问题记录：

54.3.1. 问题1：Tomcat提示启动成功，当时没有后台进程

【tomcat not start】

54.3.2. 问题2：escript: No such file or directory

/usr/bin/env: escript: No such file or directory

make: *** [get-deps] Error 127

  解决办法：

编译安装erlang

54.3.3. 问题3：rebar3执行bootstrap报错

[root@izuf66apgccn7tpnaw8k8lz rebar3]# ./bootstrap
/usr/local/rebar3/_build/default/lib/parse_trans/src/ct_expand.erl:206: illegal guard expression

解决办法：

【https://github.com/erlang/rebar3/issues/2059】

安装新版本Erlang：

It has not been supported for over a year since it is now almost 6 years old (OTP-22 should be out in a couple of months at the most); there's one breaking release a year, and 3 minor releases a year as well. Release 3.5.2 is the last one to support R16: https://github.com/erlang/rebar3/releases/tag/3.5.2

You may fetch one of these older versions if you must.

54.3.4. 问题4： 缺少OpenGL

configure: WARNING: No OpenGL headers found, wx will NOT be usable
configure: WARNING: No GLU headers found, wx will NOT be usable

http://www.prinmath.com/csci5229/misc/install.html

yum install freeglut-devel

54.3.5. 问题5： 缺少 wxWidgets

./configure: line 4661: wx-config: command not found
configure: WARNING:
                wxWidgets must be installed on your system.

                Please check that wx-config is in path, the directory
                where wxWidgets libraries are installed (returned by
                'wx-config --libs' or 'wx-config --static --libs' command)
                is in LD_LIBRARY_PATH or equivalent variable and
                wxWidgets version is 2.8.4 or above.

*********************************************************************
**********************  APPLICATIONS INFORMATION  *******************
*********************************************************************

wx             : wxWidgets not found, wx will NOT be usable

*********************************************************************

解决办法

yum install https://mirrors.huaweicloud.com/epel/epel-release-latest-7.noarch.rpm
rpm --import https://mirrors.huaweicloud.com/epel/RPM-GPG-KEY-EPEL-7
yum install wxGTK-devel

54.3.6. 问题6： 缺少 odbc

*********************************************************************
**********************  APPLICATIONS DISABLED  **********************
*********************************************************************

odbc           : ODBC library - link check failed

*********************************************************************

解决办法：

yum install unixODBC-devel.aarch64

54.3.7. 问题7： 缺少 fop

*********************************************************************
**********************  DOCUMENTATION INFORMATION  ******************
*********************************************************************

documentation  :
                 fop is missing.
                 Using fakefop to generate placeholder PDF files.

*********************************************************************

解决办法：

yum install fop-1.1-6.el7.noarch

54.3.8. 问题8： 没有java开发环境

jinterface     : No Java compiler found

sudo yum install java-11-openjdk-devel.aarch64