Guacamole

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What is Guacamole?

Guacamole is an HTML5 remote desktop gateway.

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.

Installing Guacamole on Amahi

Dependencies

  • tomcat6
  • libvncserver
  • freerdp (This is official on the Guacamole site. Fedora 14 will not support Freerdp 1.0 or higher, thus RDP protocol in Guacamole is not available. Leave freerdp out of the code below if you are running Fedora 14.)
  • libvorbis

In terminal, as root, install dependencies with the following:

bash code
​$ su Password: # yum install tomcat6 libvncserver freerdp libvorbis​


Preparing Amahi

Login to your Amahi Dashboard and choose "Set Up" in the upper right. 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.

  • Note: If you do not see the "Webapps" option under "Apps" then you need to activate "Advanced Settings" under the "Settings" tab of your Amahi dashboard.

Downloading the Binary Packages

Go to http://guac-dev.org/ and choose from the table the binary packages for your system. For Fedora 14, I chose the Fedora 15 packages and they worked flawlessly.

Installing Guacamole

In terminal, change directories to where the packages downloaded and execute the following as root:

bash code
​# tar -xzf guacamole-0.8.0-fedora-15-i386.tar.gz # cd guacamole-0.8.0-fedora-15-i386/ # rpm -i *.rpm​
  • Be aware that you may have to adjust the above code to match the file name you downloaded.

Setting up MySQL Authentication

Making the Directory

As root, create the "classpath" directory

bash code
​mkdir /var/lib/guacamole/classpath​


Installing MySQL Authentication Module

Download the MySQL Authentication Module http://sourceforge.net/projects/guacamole/files/current/extensions/guacamole-auth-mysql-0.8.0.tar.gz/download

Move to the directory containing the download and unpack the download

bash code
​# tar -xzf guacamole-auth-mysql-0.8.0.tar.gz​
  • Be aware that you may have to adjust the above code to match the file name you downloaded.


Copy all of the ".jar" files in the /lib of the downloaded file to the classpath directory you created.

bash code
​cp -r /whereever/you/downloaded/it/guacamole-auth-mysql-0.8.0/lib/*.jar /var/lib/guacamole/classpath​


You need one more ".jar" file (MySQL Connector-J)that is not included in the guacamole-auth-mysql module. You can get it here: http://dev.mysql.com/downloads/connector/j/

Move to the directory containing the download and unpack the download

bash code
​# tar -xzf mysql-connector-java-5.1.25.tar.gz​
  • Be aware that you may have to adjust the above code to match the file name you downloaded.


Copy mysql-connector-java-5.1.23-bin.jar to the classpath directory you created.

bash code
​cp -r /whereever/you/downloaded/it/mysql-connector-java-5.1.25/mysql-connector-java-5.1.23-bin.jar /var/lib/guacamole/classpath​


Making the MySQL Tables

Now we need to create a MySQL Table that Guacamole can use

bash code
​$ mysql -u root -p Enter password: default for Amahi is hda mysql> CREATE DATABASE guacamole; Query OK, 1 row affected (0.00 sec) mysql> CREATE USER 'guacamole'@'localhost' IDENTIFIED BY 'some_password'; Query OK, 0 rows affected (0.00 sec) mysql> GRANT SELECT,INSERT,UPDATE,DELETE ON guacamole.* TO 'guacamole'@'localhost'; Query OK, 0 rows affected (0.00 sec) mysql> FLUSH PRIVILEGES; Query OK, 0 rows affected (0.02 sec) mysql> quit Bye​

The database and user can be named whatever you like, but the above coding steps refer to both as "guacamole". Naturally, you should choose a real password for your user rather than the string "some_password" shown above.

Running the SQL scripts

The SQL scripts that create the database schema and default administrator user are included in the guacamole-auth-mysql-0.8.0 archive you downloaded within the schema/ directory. Change directories to the guacamole-auth-mysql-0.8.0 archive.

bash code
​cd /whereever/you/downloaded/it/guacamole-auth-mysql-0.8.0​


The scripts are named such that they can be run in order with one command: 

$ cat schema/*.sql | mysql -u root -p guacamole
Ender password: Amahi default  is hda

To get all of the MySQL code to appear on this page I had to format it as a block quote. You do run the above in terminal.

Configuring Guacamole to Use MySQL Authentication

You will need to edit /etc/guacamole/guacamole.properties

Start at the line "# Hostname and port of guacamole proxy" and replace everything below it with this: 

guacd-hostname: localhost
guacd-port:     4822

# Auth provider class (authenticates user/pass combination, needed if using the provided login screen)
auth-provider: net.sourceforge.guacamole.net.auth.mysql.MySQLAuthenticationProvider
basic-user-mapping: /etc/guacamole/user-mapping.xml

# Location to read extra .jar's from
lib-directory:  /var/lib/guacamole/classpath

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

Use the real password you chose when creating the MySQL database for the Guacamole database in place of the string "some_password" as shown above.

Deploying Guacamole

To deploy Guacamole, you must make two symbolic links: one effectively copying the web application (now located at /var/lib/guacamole/guacamole.war) into the directory Tomcat monitors for web application deployment, and the other effectively copying the configuration file, guacamole.properties, into the Tomcat's classpath, such that Guacamole can find it once it runs. This must be done as root:

bash code
​# ln -s /var/lib/guacamole/guacamole.war /var/lib/tomcat6/webapps # ln -s /etc/guacamole/guacamole.properties /usr/share/tomcat6/lib​


Restart Tomcat

bash code
​service tomcat6 restart​


Start Guacamole's service

bash code
​service guacd start​


Now configure the tomcat6 and guacd services to run automatically

bash code
​# chkconfig tomcat6 on # chkconfig guacd on​


Configuring Guacamole and Amahi

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

bash code
​# ln -s /var/lib/tomcat6/webapps/guacamole/admin.xhtml /var/hda/web-apps/guacamole/html # ln -s /var/lib/tomcat6/webapps/guacamole/agpl-3.0-standalone.html /var/hda/web-apps/guacamole/html # ln -s /var/lib/tomcat6/webapps/guacamole/client.xhtml /var/hda/web-apps/guacamole/html # ln -s /var/lib/tomcat6/webapps/guacamole/guacamole-common-js /var/hda/web-apps/guacamole/html # ln -s /var/lib/tomcat6/webapps/guacamole/images /var/hda/web-apps/guacamole/html # ln -s /var/lib/tomcat6/webapps/guacamole/index.xhtml /var/hda/web-apps/guacamole/html # ln -s /var/lib/tomcat6/webapps/guacamole/layouts /var/hda/web-apps/guacamole/html # ln -s /var/lib/tomcat6/webapps/guacamole/META-INF /var/hda/web-apps/guacamole/html # ln -s /var/lib/tomcat6/webapps/guacamole/scripts /var/hda/web-apps/guacamole/html # ln -s /var/lib/tomcat6/webapps/guacamole/styles /var/hda/web-apps/guacamole/html # ln -s /var/lib/tomcat6/webapps/guacamole/WEB-INF /var/hda/web-apps/guacamole/html​
  • Hint: Count your links and make sure you have all of them!


As root, create .htaccess file in /var/hda/web-apps/guacamole/html

bash code
​# cd /var/hda/web-apps/guacamole/html # gedit .htaccess​


This is the text for the .htaccess file: 

RewriteEngine On
RewriteCond %{SERVER_PORT} 80
RewriteRule (.*) http://%{HTTP_HOST}:8080/guacamole [R,L]

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

bash code
​# chown -R apache /var/hda/web-apps/guacamole # chgrp -R users /var/hda/web-apps/guacamole​


In /etc/httpd/conf.d/####-guacamole.conf, change "AllowOverride AuthConfig" to "AllowOverride FileInfo Limit Options Indexes"

Logging In to Guacamole

You can access the web login screen for Guacamole from the server at http://127.0.0.1:8080/guacamole

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.

With everything configured correctly you should be able to access the web login screen through Amahi at http://guacamole.yourhdaname.com:8080/guacamole/

Port Forwarding

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. (serverblahblah.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.

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