A colleague of mine, Mark Mundy, recently got a query about using Traffic Director to server static content. Following on from that he put together this example of how it can be achieved.
Oracle Traffic Director version 12c (12.2.1) does
support the serving of static content alongside the existing
capability to cache content. More details on how this is achieved can
be found here:
http://docs.oracle.com/middleware/1221/otd/admin/vs.htm#OTADG3389
With this
confirmed, I then utilised the current version of Java Cloud Service
on an Oracle Cloud Machine to try out this capability. I created
a simple WLS Service based upon 12.2.1 Enterprise Edition and selected
to utilise a load balancer for my 2 manged server cluster. This
ensured as part of the service I had provisioned a single instance of
OTD 12.2.1 that I could then use to serve static content.
For this very
simple test I created very basic html file that referenced an image
file and my plan was to copy these two assets to the local storage of
the OTD virtual machine hosting OTD. Below is the html file I used
and you can see the referenced image that was stored alongside it. I
created a basic index.html to ensure the file was servers when the
default uri was accessed.
<HTML>
<HEAD>
<TITLE>OTD is great!</TITLE>
</HEAD>
<BODY BGCOLOR="FFFFFF">
<CENTER><IMG SRC="stormtrooper.jpg" ALIGN="BOTTOM"> </CENTER>
<HR>
<H1>This is being served by Oracle Traffic Director</H1>
<a href="http://docs.oracle.com/middleware/1221/otd/admin/vs.htm#OTADG24099">OTD Admin Guide : 7.11 Content Serving</a>
is where you will find details on how to do this!
<HR>
</BODY>
</HTML>>
<HEAD>
<TITLE>OTD is great!</TITLE>
</HEAD>
<BODY BGCOLOR="FFFFFF">
<CENTER><IMG SRC="stormtrooper.jpg" ALIGN="BOTTOM"> </CENTER>
<HR>
<H1>This is being served by Oracle Traffic Director</H1>
<a href="http://docs.oracle.com/middleware/1221/otd/admin/vs.htm#OTADG24099">OTD Admin Guide : 7.11 Content Serving</a>
is where you will find details on how to do this!
<HR>
</BODY>
</HTML>>
OTD executes
under the oracle user and so I created a sub directory under the
oracle home to store the html and the image
-bash-4.1$ pwd
/u01/app/oracle/tools/paas/state/homes/oracle/myscontent
-bash-4.1$ ls
index.html stormtrooper.jpg
With the static
content in place I now needed to make configuration changes to OTD in
order to enable it to be able to served. Logging into the
Fusion Middleware Control UI (OTD 12.2.1’s administration home)
from within the JCS UI, I navigated to the OTD configuration already
provisioned. I selected the single virtual server associated with the
configuration and selected the ‘Content Serving’ section/u01/app/oracle/tools/paas/state/homes/oracle/myscontent
-bash-4.1$ ls
index.html stormtrooper.jpg
 |
| Content Serving tab in Fusion Middleware Control UI |
Here I selected
to ‘Create …’ a new content rule
In the dialogue
presented I added the following:
 |
| Rule to specify location of static content |
Once created
there is the opportunity to go back into the rule and edit it further
should you need to. You can for example allow directory listing if
desired.
The rule is
immediately activated in the running instance and so it is now
possible to use a browser to request OTD to serve the html page.
https://<my_public_ip>/opcm/
This resulted in
OTD responding with the default index.html from the directory
associated with the rule created. The resulting page looking a little
like this below.
 |
| Web content delivered from OTD |
