开源 janus（webrtc gateway） 在centos7上的安装及使用

参考
https://blog.youkuaiyun.com/u012231640/article/details/83618274#Webrtc_Server_289
（感谢作者）

主要步骤

1. 安装必要插件及Janus，运行

以下为安装脚本

#!/bin/sh
yum install -y epel-release && \
yum update -y && \
yum install -y deltarpm && \
yum install -y openssh-server sudo which file curl zip unzip wget && \
yum install -y libmicrohttpd-devel jansson-devel libnice-devel glib22-devel opus-devel libogg-devel pkgconfig  gengetopt libtool autoconf automake make gcc gcc-c++ git cmake libconfig-devel openssl-devel

#upgrade libsrtp 1.5.4
wget https://github.com/cisco/libsrtp/archive/v1.5.4.tar.gz
tar xfv v1.5.4.tar.gz
cd libsrtp-1.5.4
./configure --prefix=/usr --enable-openssl
make shared_library && sudo make install

cd -

wget https://github.com/cisco/libsrtp/archive/v2.0.0.tar.gz
tar xfv v2.0.0.t