This is a quick tip to show you how to get the Citrix Configuration Log, plus all the old and new property values, and convert this all to JSON.
Here is a quick tip for you. I had a need to get the Citrix Configuration Log, so I dropped into PowerShell and ran Get-CtxConfigurationLogReport. That is all good and well, but you do not get all the old and new values of the changed properties. However, converting this output to JSON will do just what I want. Plus, converting to JSON is better for me anyway as I want to push this stuff over to Splunk to do some analytics. Here is what you need to do:
Step 1 – Create your UDL file to connect to the database
This will prompt you for your SQL credentials. You can use Windows integrated security if you like, but I’m saving my creds for later use outside of my interactive PowerShell session later.
Step 2 – Get the things
# Load the Citrix Common Commands Snapin
Get-PSSnapin -Registered "Citrix.Common.Commands" | Add-PSSnapin
# Get the configuration log and convert to JSON
Get-CtxConfigurationLogReport -DataLinkPath C:\conflog.udl | ConvertTo-Json -Depth 10
Here is some sample output (notice the property old and new values)
This is the second part of the IoT workspace demo. This time, we will use proximity to kick off an Octoblu workflow without an iBeacon – mainly because this was a last minute add to the demo 😉
A Poor Man’s iBeacon
a.k.a. I needed a quick solution for proximity without an iBeacon
During the Citrix Geek Speak demo I previously blogged about, we needed a way to kick off everything. Steve and I discussed a few different ways of doing this, but we landed on using proximity – meaning when Steve walked over to the IoT workspace with a particular device, everything would light up and we would be off to the races. The correct way to do this would be an iBeacon, but this was a last minute decision and we didn’t have one. So, we used bluetooth paring on a laptop. The rest of this article explains that part in detail.
Proximity with a Laptop
My first thought was to write some code to accomplish starting an Octoblu workflow using bluetooth proximity. There are some examples out there for the pieces I needed for this (bluetooth pairing, bluetooth signal strength, curl, etc.). But then I thought that there might be something already written. Sure enough, I found 2 solutions (for Mac) – EventScripts and Bluetooth Proximity Tasker. EventScripts was more robust and felt more polished, but I ended up using Bluetooth Proximity Tasker for the simple fact that I could control exactly how strong of a bluetooth signal I needed to start/stop an action. This was important as I didn’t know ahead of time what the signal strength would be like on stage at Geek Speak Tonight (especially once the room filled up with fellow Geeks).
As you can see in the screenshot above, there is a slider that lets me choose the signal strength. The green bar you see above the slider is my actual signal strength. So, I would walk around to see what my actual strength was and set the slider appropriately.
AppleScript Kicks off the Flow
So now that we have have the bluetooth strength thing worked out, all we need is a script to kick off the Octoblu flow. Recall from my previous post that all triggers in Octoblu have a HTTP POST URL. I just used this URL and curl to work the magic. Here is the script:
say "eye oh tee, work space. activated"
set theURL to "[your trigger URL]"
do shell script "curl -X POST " & quoted form of theURL
The first line is a quasi-phonetic pronunciation for “IoT Workspace Activated”. That is about as close as I could get using AppleScript. The next two lines actually kick off the Octoblu IoT workspace in a green state.
So, there you have it. That is pretty much the complete IoT Workspace demo from my side of the desk. Octoblu is a lot of fun and I’m experimenting with other ways of using this software for business, home automation, and just plain fun (like Legos). Go experiment yourself and have fun!
Octoblu does some incredible stuff with physical things driven by software. Steve Greenberg and I did a demo during Geek Speak Tonight at Citrix Synergy triggering physical devices via a Splunk search. This article goes into some of the Splunk details.
An alternate title to this article might be “How Steve Greenberg and I Pulled off the Robo-Kitty Monitor Alerts at Citrix Synergy Geek Speak Tonight”.
In case you missed it, here it is below:
The Demo Scenario
Anyway, Octoblu does some incredible stuff with physical things driven by software. In the demo that Steve and I did, Steve set up an actual desk with various IoT devices on it. We will call this the “IoT Workspace”. The IoT Workspace had a digital picture frame, lights that can change color, a mini file cabinet (that held business cards), a maneki-neko (a.k.a. lucky cat) with several hacked features, a smoke machine, and more. We started the IoT Workspace using proximity (look for another article about how we did that soon). Then, I had a Splunk instance monitoring a Citrix stack including network, XenApp, hypervisors (XenServer, Hyper-V, and VMware), physical hardware (in this case Cisco UCS), shared storage, NetScaler, etc. At the beginning of the demonstration, the environment was all-good so everything glowed green, the Robo-Kitty was happy, and the picture frame on the desk showed an array of our favorite pictures (see below):
Then, the ICA Round Trip Time started to go up. Nothing terrible, but we used that as an indicator that our users might start seeing some lag in their sessions. This is where Splunk fired the first Octoblu trigger to go to a “yellow” state. The picture frame showed a worried Minion, lights turned yellow, and Robo-Kitty’s eyes turned yellow and started to swivel.
Next, Splunk showed problems with the XenApp servers and hypervisors in addition to the ICA Round Trip Time. So, Splunk triggered a “red” state. The Minion in the picture frame looked more worried, lights turned red, and Robo-Kitty’s eyes turned red and around faster.
Finally, the entire stack went to pot. The write latency on the storage array went through the roof, the hypervisors were not happy, the XenApp server resources were scarce, the ICA Round Trip Time was off the chart. Splunk triggered the “defcon red” state. Robo-Kitty shot lasers out of its chest, the storage cabinet on the IoT Workspace started to rattle, smoke was coming out of the desk. The culprit ended up being a write controller issue on the shared storage. Once everything was fixed, Splunk triggered the “green” state again.
How it Works
Steve did all the physical work building the IoT Workspace by hooking up Raspberry Pi, Gateblu, servos, lights, etc. Check out his article for more info -> http://www.thinclient.net/blog/?p=473. Steve also built the Octoblu flows to make all that stuff work.
I hooked up the Octoblu triggers in Splunk to kick off all these connected devices. A trigger generally initiates Octoblu flows. These triggers have HTTP POST URLs that can be used to remotely initiate the flows (see screen shot). This is how I had Splunk act upon the data seen in the Citrix stack.
I ran a Splunk real-time search and triggered a Python script that initiated the HTTP POST with data from the Splunk search to Octoblu when certain conditions happened. For example, if the ICA Round Trip Time exceeds 30ms and is less than 60ms, trigger a yellow alert condition. Here is the Splunk search:
sourcetype=ICA:RTT ICARTT > 30 ICARTT < 60 | eval url="<HTTP POST URL for the Octoblu trigger>" | eval alert_level="Yellow"
If you are interested, I have the entire Splunk/Octoblu example I used uploaded to GitHub. You can also download and use Splunk for free. There is a data generator built in there as well that will let you trigger different conditions like I did in the demo.
The magic happens in the saved search and a python scripted named octoblu_trigger.py. The saved search contains the HTTP POST url and the condition. The python script takes those parameters from the search and sends it over to Octoblu. If you want to play around with this on your own system, be sure to edit the saved search by opening the Octoblu app in Splunk and clicking Settings -> Searches, reports, and alerts:
Click on the example alert and change the URL to your Octoblu trigger URL.
Anyway, there you go. It may look kind of complicated at first, but really it is quite easy to trigger any Octoblu workflow given a variety of trigger situations.
Mobility is so ubiquitous that it is almost not even a separate thing anymore. I have had some experience building mobile apps and wanted to ponder some self-proclaimed theorems which are outlined in this article.
Mobility is so ubiquitous that it is almost not even a separate thing anymore. This creates a challenge for enterprises that offer BYOD mobile devices and corporate data access. How do you enable the mobile workforce with enterprise applications? One way is to roll your own mobile application to get the necessary data into the mobile user’s hands. I have had some experience with this and wanted to ponder some self-proclaimed theorems which are outlined below.
Mobile applications developed for native devices with native code are superior.
The following is an example of what you might need to build native mobile applications for various mobile devices:
Android SDK, Android NDK
Eclipse, NetBeans, IntelliJ IDEA
C# and others
Window 8 Metro Style Apps
Java ME + Optional Packages + API extensions
Unfortunately, BYOD makes Theorem #1 hard. If you are going to go the native code route, you have to maintain a separate code base (with separate IDE’s) for all possible devices your users will bring in. There are some other frameworks that I’ll talk about in another article that help with this, but there is always a tradeoff.
Apps that Look Better are Perceived to be Better.
Looks matter. Period. If you give an application to a user that has limited functionality but looks sexy, that application will be perceived as better than an application that has more functionality but is ugly. You know it’s true.
Therefore, do yourself a favor and use a framework like one of the following:
These frameworks make it easy to make it look like you know what you are doing (at lease design-wise)
Inverse Proportions are Everywhere.
There is always a tradeoff somewhere. Referencing the picture above, think about painting a room. I can paint a room with a paintbrush and not waste too much paint. However, to speed things up, I use a paint roller and waste more paint. Therefore, the ease/speed in which I paint a room is inversely proportional to how much paint I waste.
The same thing is true for security. If everyone in the world had a public IP address with wide open ports, things would be pretty easy if there were not bad guys/girls out here. In the real world, there are bad guys/girls out there, so we have to attempt to keep them out. The security measures can be a burden on the user. Therefore, security is inversely proportional to usability.
There, of course, is a tradeoff. Building mobile apps with abstraction layers like PhoneGap introduce translation. You may not have access to all mobile device features immediately, there can be a performance tax, and apps will tend to be bigger. Not all mobile frameworks are created equal and I will talk about some pros and cons of different frameworks (like Xamarin, Citrix Mobile SDK for Windows Apps, Intel XDK, etc.) in a separate article.
So, there you have it. My self-proclaimed theorems for mobile app development. Agree? Disagree? Or, have something else to add? Just leave a comment below.
Citrix Synergy is back in Anaheim, California this year and I will be live-blogging the keynote. You can watch the keynote live at CitrixSynergy.com as well. I am sure there will be a focus on mobility, but with the release of XenDesktop and XenApp 7.5, I am excited to see Citrix getting back to the future (again).
Starting with XenDesktop 7, Citrix stores the data the Desktop Director displays in a SQL database. Citrix opened up this data via a Monitor Service API that uses OData. I’m not going to go deep into the details of the API as it is fairly well documented at the eDocs site. The examples in the documentation show you how to access this data via web browser, Microsoft Excel, and LinqPad. What I want to do in this article is show you how to use PowerShell with this API.
To start out, let’s take a look at the Citrix Monitor Service schema (click to enlarge):
Suppose we want to get all sessions as well as the all the connection/disconnections to the session. The following URL will return the data we want in XML format.
Citrix Synergy is in Anaheim, California this year. With the recent release of Excalibur, it will be interesting to see what is revealed during the keynote. I’ll be live-blogging the keynote this year. Check it out here or on Twitter @JasonConger.
It is time for Citrix Synergy, and I will be live-blogging the keynote. With the recent release of Excalibur, I expect the keynote focus to be a lot around capabilities and features. I also expect to see some more around mobility, networking, and cloud. Be sure to stay tuned here and/or follow me on Twitter.
Citrix Synergy has returned to Barcelona, Spain. That means that I will be live blogging the keynote again this year.
Citrix Synergy has returned to Barcelona, Spain. That means that I will be live blogging the keynote again this year. Last year in Barcelona and earlier this year in San Francisco, Citrix talked a lot about public/private/personal cloud. I am looking forward to see som fruition out of their vision. I also fully expect Mark Templeton to have “one more thing” at the end of the keynote as well. Stay tuned… Continue reading “Citrix Synergy Barcelona 2012 Keynote Live Blog”