在阿里云ECS上面安装bigbluebutton

服务器环境

Ubuntu 16.04
1核4G
已打开端口信息：

已打开端口.png

bbb安装

安装bbb2.2版本
我这里使用github上面提供的bbb-install.sh脚本进行安装，安装过程很慢，也多次提示错误，不过重复执行下面的命令最后也成功了，还是推荐按照官网上面的步骤去安装

 wget -qO- https://ubuntu.bigbluebutton.org/bbb-install.sh | bash -s -- -v xenial-220 -a

安装完成后的信息如下：


BigBlueButton Server 2.2.0-rc-2 (1613)
                    Kernel version: 4.4.0-142-generic
                      Distribution: Ubuntu 16.04.6 LTS (64-bit)
                            Memory: 4046 MB
                         CPU cores: 1

/usr/share/bbb-web/WEB-INF/classes/bigbluebutton.properties (bbb-web)
       bigbluebutton.web.serverURL: http://172.18.243.192
                defaultGuestPolicy: ALWAYS_ACCEPT
                 svgImagesRequired: true

/etc/nginx/sites-available/bigbluebutton (nginx)
                       server name: 172.18.243.192
                              port: 80, [::]:80
                    bbb-client dir: /var/www/bigbluebutton

/var/www/bigbluebutton/client/conf/config.xml (bbb-client)
                Port test (tunnel): rtmp://172.18.243.192
                              red5: 172.18.243.192
              useWebrtcIfAvailable: true

/opt/freeswitch/etc/freeswitch/vars.xml (FreeSWITCH)
                       local_ip_v4: 172.18.243.192
                   external_rtp_ip: stun:stun.freeswitch.org
                   external_sip_ip: stun:stun.freeswitch.org

/opt/freeswitch/etc/freeswitch/sip_profiles/external.xml (FreeSWITCH)
                        ext-rtp-ip: $${local_ip_v4}
                        ext-sip-ip: $${local_ip_v4}
                        ws-binding: :5066
                       wss-binding: :7443

/usr/local/bigbluebutton/core/scripts/bigbluebutton.yml (record and playback)
                     playback_host: 172.18.243.192
                 playback_protocol: http
                            ffmpeg: 4.1.3-0york1~16.04

/etc/bigbluebutton/nginx/sip.nginx (sip.nginx)
                        proxy_pass: 172.18.243.192

/usr/local/bigbluebutton/bbb-webrtc-sfu/config/default.yml (Kurento SFU)
                        kurento.ip: 172.18.243.192
                       kurento.url: ws://127.0.0.1:8888/kurento
                    localIpAddress: 172.18.243.192
               recordScreenSharing: true
                     recordWebcams: true
                  codec_video_main: VP8
               codec_video_content: VP8

/usr/share/meteor/bundle/programs/server/assets/app/config/settings.yml (HTML5 client)
                             build: 798
                        kurentoUrl: ws://172.18.243.192/bbb-webrtc-sfu
                  enableListenOnly: true


# Potential problems described below
# Not running:  tomcat7 or grails

# Error: Found text in freeswitch.log:
#
#    Thread ended for mod_event_socket
#
# FreeSWITCH may not be responding to requests on port 8021 (event socket layer)
# and users may have errors joining audio.
#

#
# Error: Unable to connect to the FreeSWITCH Event Socket Layer on port 8021
#
................................................................................
# Error: Could not connect to the configured hostname/IP address
#
#    http://172.18.243.192/
#
# If your BigBlueButton server is behind a firewall, see FAQ.

# Warning: The API demos are installed and accessible from:
#
#    http://172.18.243.192
#
# and
#
#    http://172.18.243.192/demo/demo1.jsp
#
# These API demos allow anyone to access your server without authentication
# to create/manage meetings and recordings. They are for testing purposes only.
# If you are running a production system, remove them by running:
#
#    apt-get purge bbb-demo

# Warning: found only 1 cores, whereas this server should have (at least) 4 CPU cores
# to run BigBlueButton in production.
#
#   https://docs.bigbluebutton.org/install/install.html#minimum-server-requirements
#

可以发现里面有一行错误提示Error: Unable to connect to the FreeSWITCH Event Socket Layer on port 8021,这个问题是因为服务器不支持ipv6，需要禁用freeswitch的ipv6选项。

一开始并没留意到上面的错误，打开demo的时候提示网站看到下面的错误。（后面配置完成偶尔也会出现这个错误界面，不过重新进入网站就可以了，或者多刷新几次）。

java.lang.NullPointerException
    at org.apache.jsp.demoHTML5_jsp.getJoinURLExtended(demoHTML5_jsp.java:259)
    at org.apache.jsp.demoHTML5_jsp._jspService(demoHTML5_jsp.java:1257)
    at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:731)
    at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:439)
    at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:400)
    at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:344)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:731)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:303)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
    at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:221)
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:122)
    at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:505)
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:169)
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103)
    at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:956)
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:116)
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:436)
    at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1078)
    at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:625)
    at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:316)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
    at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
    at java.lang.Thread.run(Thread.java:748)

安装完成后需要根据服务器的环境修改相关参数

FreeSWITCH无法绑定到端口8021

http://docs.bigbluebutton.org/2.2/troubleshooting.html#freeswitch-fails-to-bind-to-port-8021

vi /opt/freeswitch/etc/freeswitch/autoload_configs/event_socket.conf.xml

//change the line  

//to

$ sudo mv /opt/freeswitch/etc/freeswitch/sip_profiles/internal-ipv6.xml /opt/freeswitch/etc/freeswitch/sip_profiles/internal-ipv6.xml_
$ sudo mv /opt/freeswitch/etc/freeswitch/sip_profiles/external-ipv6.xml /opt/freeswitch/etc/freeswitch/sip_profiles/external-ipv6.xml_

配置ip

root@bbb:~# sudo bbb-conf --setip 120.24.55.239
Assigning 120.24.55.239 for testing for firewall in /var/www/bigbluebutton/client/conf/config.xml
Assigning 120.24.55.239 for rtmp:// in /var/www/bigbluebutton/client/conf/config.xml
Assigning 120.24.55.239 for servername in /etc/nginx/sites-available/bigbluebutton
Assigning 120.24.55.239 for http[s]:// in /var/www/bigbluebutton/client/conf/config.xml
Assigning 120.24.55.239 for publishURI in /var/www/bigbluebutton/client/conf/config.xml
Assigning 120.24.55.239 for web application URL in /usr/share/bbb-web/WEB-INF/classes/bigbluebutton.properties
Assigning 120.24.55.239 for web application URL in /usr/share/bbb-apps-akka/conf/application.conf
Assigning 120.24.55.239 for api demos in /var/lib/tomcat7/webapps/demo/bbb_api_conf.jsp
Assigning 120.24.55.239 for record and playback in /usr/local/bigbluebutton/core/scripts/bigbluebutton.yml
Assigning 120.24.55.239 for playback of recordings: 
Restarting the BigBlueButton 2.2.0-rc-2 ...
Stopping BigBlueButton

Starting BigBlueButton

配置ssl证书

http://docs.bigbluebutton.org/2.2/install.html#configure-ssl-on-your-bigbluebutton-server

1002 Could not make a WebSocket connection

到这一步，可以正常打开bbb-demo界面，但打开麦克风的时候提示1002
错误。打开网页空控制台，也看到ws的请求失败了。

image.png

查找文档，文档里面有关于1002错误的具体说明以及解决方法

1002：无法建立WebSocket连接 -初始WebSocket连接失败。可能的原因：
防火墙阻止WS协议
服务器已关闭或配置不正确

http://docs.bigbluebutton.org/2.2/configure-firewall#configure-a-dummy-nic-if-required

To setup a dummy NIC, on your BigBlueButton enter the following command and substitute EXTERNAL_IP_ADDRESS with the external IP address of your firewall.

sudo ip addr add EXTERNAL\_IP\_ADDRESS/32 dev lo

Next, edit /opt/freeswitch/conf/sip_profiles/external.xml and ensure the value for wss-binding uses the external IP address

配置完虚拟网卡之后，bbb-demo运行正常，麦克风正常，桌面分享也可以，到这里就算安装完成了。
一篇关于linux虚拟ip的文章https://blog.csdn.net/zhengwei125/article/details/53019651

配置TURN（非必需）

当前的stun服务器是使用默认配置的地址，可以打开控制台观察bigbluebutton/api/stuns这个请求看到服务器返回的stun信息，stun.freeswitch.org这个域名是在美国，所以可能会影响连接速度（这个是我的猜测，可能不正确，我自己了解到stun的turn在nat穿透上面的作用不太一样，我猜测在某些复杂的网络请求下还是需要turn服务器的），我们打算自己安装一个。
P2P技术详解(三)：P2P技术之STUN、TURN、ICE详解

{
    "stunServers": [
        {
            "url": "stun:stun.freeswitch.org"
        }
    ],
    "turnServers": [
        
    ],
    "remoteIceCandidates": [
        
    ]
}

http://docs.bigbluebutton.org/2.2/setup-turn-server.html

按照文档的说明在服务器上面安装了turn服务器，修改相关配置，最后bbb-demo也运行正常，可以看到修改后返回的stun地址是服务器的地址。

{
    "stunServers": [
        {
            "url": "stun:120.24.55.239"
        }
    ],
    "turnServers": [
        
    ],
    "remoteIceCandidates": [
        
    ]
}

服务器上也有在监听的turn服务