Category Archives: VCAP-DCA

vCenter Orchestrator – Edit an existing Workflow

vCenter Orchestrator is quite new to me so it’s been a bit of learning curve preparing for the DCA exam, I often find the best way for me to study is to write things down so they filter through my braincells and hopefully to memory.  I will edit a very basic VCO workflow that will change the number of vCPUs of a specific VM,  I will not be going through the creation of the workflow I am only concerned with editing the attributes of an existing workflow.

1. Browse to the ‘Schema’ view of the workflow and edit the ‘Action Element’ by clicking on the pencil icon..

2. Browse to the ‘Visual Binding’ tab.

I find the easiest way to inspect and modify the inputs and attributes is to use the visual bindings tab.

An ‘input’ is a value the user needs to enter in order to complete the workflow,  Attributes on the other hand are predefined and are not exposed to the person running the workflow, for the purpose of demonstration I have included one ‘Input’ and one ‘Attribute’.  In this example the Input will ask the user to enter the number of vcpus required for the virtual machine, the Attribute will define the virtual machine to modify.  We don’t need to do anything with the Input as it’s set up correctly but we will need to edit the attribute to select the correct virtual machine.

3. To edit an attribute go to the ‘General’ tab.

4. Select ‘vm1’ and click the ‘Not set’ hyperlink.

5. Drill down to the correct virtual machine, in this case ‘CPUMod’

6. The value should now change to the virtual machine name, at this point we don’t need to change anything else.


7. Run the workflow.


8. Virtual Machine before workflow is run.


9. Enter number of vCPUS required and hit submit.

10. vCPU count has been modified

I guess the thing to remember is that attributes are edited on the ‘General’ tab, they come in different formats as shown below.

  • String – a clear text box where you can type whatever you like.
  • Boolean – True or False
  • Predefined VCO parameter – e.g. VC.Datacenter, you need to click the ‘Not set’ link to define this type of attribute.

To illustrate this further the screenshot below shows the attributes of a workflow that creates a new DataCenter and Cluster.



I didn’t actually study much since the last attempt, I think the difference this time around was a good nights sleep!  I left 2 questions unanswered (some research for me to do) but felt I answered the remaining questions well, I finished the exam with 10 minutes to spare.  I received an email from VMware the following day saying that my transcript had been updated but I’m yet to receive the official ‘Pass’ email that tells me the score, I’ll chase them up in the coming days.  So that’s it..VCAP DCD and VCAP DCA passed, I didn’t quite hit my initial target of passing both exams in 3 months, maybe it was a bit ambitious, but I’m very glad to have them both on my CV.  It’s been a great learning experience and I feel it’s broadened my knowledge, I’m still undecided if I’ll attempt the VCDX, I start a 6 month contract on Monday and expect to be kept very busy so I’ll have a think and decide in a couple of months.  Good luck to all attempting the advanced exams, there’s no doubt they are challenging but the experience and reward is well worth it!




VCAP-DCA Exam Prep

So the home Lab was deployed and the study started about 6 weeks ago, the exam is booked for the 16th June at 08:15am which is tomorrow morning.

My intention is to go through all the questions and look for the quick wins, once they are completed I will go back through the questions that require a little more thought.  This may change once I’ve clicked  the ‘Start Exam’ link and panic sets in, but I’ll do my best to stick to this strategy.  As for study materials, I’ve been using the VCAP5-DCA Official Cert Guide book which has some good scenarios at the end, I’ve also used  Joshua Andrews fantastic test track lab, a really helpful guy!  I’ve been up and down the exam blueprint many times to make sure I’ve covered each of the topics and of course lot’s and lot’s of practice in the home lab. Finding time to study has been a bit of a challenge as we recently had our second child so I don’t feel as prepared as I would have liked. I did consider re-scheduling the exam, but the next convenient slot was a month away so I decided to just go for it.  So here goes nothing……

Some really good scenario based questions can be found on the links below.

Practice Test 1

Practice Test 2

Practice Test 3