Guacamole

	WARNING
	This is recommended only for advanced users, proceed with caution.

What is Guacamole?

Guacamole is an HTML5 remote desktop gateway that can be installed on Amahi 8 or newer.

Guacamole provides access to desktop environments using remote desktop protocols like VNC and RDP. A centralized server acts as a tunnel and proxy, allowing access to multiple desktops through a web browser.

No browser plugins are needed, and no client software needs to be installed. The client requires nothing more than a web browser supporting HTML5 and AJAX.

REF: Setting Up Web-Based Guacamole Tool to Access Remote Linux/Windows Machines

Install Guacamole

WARNING: This guidance is for Fedora 23, but may work with other versions. All commands in this tutorial are executed as root (or precede with sudo).

Prerequisites

Login to your Amahi Dashboard and install the Amahi Web Apps plug-in to use this guidance. Ensure you enable Advanced Settings.

Now select the "Apps" tab. Click on "Webapps" and on the page that comes up choose the "New Web App" button at the bottom. Fill in the name (guacamole) and leave everything else as it is.

Edit ####-guacamole.conf in /etc/httpd/conf.d (replacing #### with the appropriate number):

vi /etc/httpd/conf.d/####-guacamole.conf

Right below the ServerAlias line, add the following:

ProxyPass / http://localhost:8080/guacamole/
ProxyPassReverse / http://localhost:8080/guacamole/

Again, if you use vi for creating this file, press the Esc key to get back in command mode and :wq to write the changes and quit vi.

Restart Apache

systemctl restart httpd

Install Dependencies

Due to the Fedora freerdp packages being unstable, we must use the CentOS stable version. To install:

wget https://www.dropbox.com/s/p2uc1rcpckky75v/libxkbfile-1.0.8-5.el7.x86_64.rpm
wget https://www.dropbox.com/s/0tjm7q93z9pw0hj/freerdp-libs-1.0.2-6.el7_2.1.x86_64.rpm
wget https://www.dropbox.com/s/aysml7coehz0hqi/freerdp-devel-1.0.2-6.el7_2.1.x86_64.rpm
rpm -Uvh libxkbfile-1.0.8-5.el7.x86_64.rpm
rpm -Uvh freerdp-libs-1.0.2-6.el7_2.1.x86_64.rpm
rpm -Uvh freerdp-devel-1.0.2-6.el7_2.1.x86_64.rpm

To install the Fedora dependencies, execute the following: For Fedora 23 or newer (Fedora 21, substitute yum for dnf):

dnf install tomcat gcc cairo-devel libjpeg-devel libpng-devel uuid-devel \
pango-devel libssh2-devel libtelnet-devel libvncserver-devel pulseaudio-libs-devel openssl-devel \
libvorbis-devel libwebp-devel dejavu-sans-mono-fonts terminus-fonts terminus-fonts-console

Configure MySQL Authentication

Install MySQL Authentication Module

Create a working directory and move there

mkdir -p /var/hda/web-apps/guacamole/sqlauth && cd /var/hda/web-apps/guacamole/sqlauth

Download Guacamole's authorization module

wget http://sourceforge.net/projects/guacamole/files/current/extensions/guacamole-auth-jdbc-0.9.9.tar.gz

Unpack it

tar -zxf guacamole-auth-jdbc-0.9.9.tar.gz

Download MySQL and Java Connector

wget http://dev.mysql.com/get/Downloads/Connector/j/mysql-connector-java-5.1.38.tar.gz

Unpack it

tar -zxf mysql-connector-java-5.1.38.tar.gz

Create directories for the extensions in Tomcat's folders

mkdir -p /usr/share/tomcat/.guacamole/{extensions,lib}

Move the modules to their respective directories.

mv guacamole-auth-jdbc-0.9.9/mysql/guacamole-auth-jdbc-mysql-0.9.9.jar /usr/share/tomcat/.guacamole/extensions/
mv mysql-connector-java-5.1.38/mysql-connector-java-5.1.38-bin.jar /usr/share/tomcat/.guacamole/lib/

Restart MariaDB

systemctl restart mariadb

Create the Database

hda-create-db-and-user guacdb

Load Guacamole Data

The schema for MySQL was downloaded in the previous process. Just change directories to the files location

cd /var/hda/web-apps/guacamole/sqlauth/guacamole-auth-jdbc-0.9.9/mysql/schema/ 

and run the following command:

cat ./*.sql | mysql -uroot -phda guacdb

Install Guacamole Server

Guacamole uses "guacd", a Guacamole server and a Guacamole Client for users to connect to the "guacd" server. We first install Guacamole Server.

Change Directories

cd /var/hda/web-apps/guacamole

Download Guacamole Server

wget https://sourceforge.net/projects/guacamole/files/current/source/guacamole-server-0.9.9.tar.gz

Unpackage it

tar -xzf guacamole-server-0.9.9.tar.gz

Move to the Guacamole source code directory

cd guacamole-server-0.9.9/

Configure, make and install it.

./configure --with-init-dir=/etc/init.d
make
make install
ldconfig

Install Guacamole Client

Create a new directory and move to it.

mkdir -p /var/lib/guacamole && cd /var/lib/guacamole/

Download Guacamole Client.

wget http://sourceforge.net/projects/guacamole/files/current/binary/guacamole-0.9.9.war -O guacamole.war

Create a symbolic link of the file for Tomcat.

ln -s /var/lib/guacamole/guacamole.war /var/lib/tomcat/webapps/

Create Guacamole Configuration

Create a directory for the configuration file.

mkdir -p /etc/guacamole/

Create a file called "guacamole.properties" in that directory

vi /etc/guacamole/guacamole.properties

Press the i key to begin inserting text into the guacamole.properties file and include the following contents:

# MySQL properties
mysql-hostname: localhost
mysql-port: 3306
mysql-database: guacdb
mysql-username: guacdb
mysql-password: guacdb

# Additional settings
mysql-default-max-connections-per-user: 0
mysql-default-max-group-connections-per-user: 0

If you use vi for creating this file, press the Esc key to get back in command mode and :wq to write the changes and quit vi.

Now create a symbolic link of this file for Tomcat

ln -s /etc/guacamole/guacamole.properties /usr/share/tomcat/.guacamole/

Create Symbolic links between guacamole in Tomcat and Amahi's web app directory

ln -s /var/lib/tomcat/webapps/guacamole/* /var/hda/web-apps/guacamole/html

Make sure the owner of all the file is apache and the group is users.

chown -R apache:users /var/hda/web-apps/guacamole

Start Guacamole Server

Restart Tomcat.

​/usr/bin/systemctl restart tomcat

Start Guacamole Server.

/etc/init.d/guacd start

Configure Guacamole Server to start at boot.

​/usr/bin/systemctl enable tomcat
/usr/sbin/chkconfig guacd on

Logging In to Guacamole

You can access the web login screen for Guacamole from other computers in the network you can access Guacamole by http://****:8080/guacamole (Where the "****" is the IP address of your Amahi server).

The default user is "guacadmin", with the default password of "guacadmin". You can change your password by editing your own user in the administration screen.

Access Outside Network

If you want Guacamole's web interface to be accessible outside of your LAN you will have to forward a random, unused port (1111, for example) to port 8080 in your router.

Then when you access Guacamole from outside your LAN you will need to add /guacamole to the end of your url. (http://servername.yourhda.com:1111/guacamole).

If you do not add /guacamole to your url, you will see a blank page since you did not specify which application in Tomcat you wanted to access.