Got Red Hat Certified on Containers.

[IBM-Murali]

Hello All

Happy to report got RH certified Specialist on Containers  after going through the DO188 course on first attempt. 

Read the questions carefully and answer them accordingly.  I believe the DO188 course covers the exam objectives. Review the objectives for the exam on the exam detail page and make sure you are familiar with those objectives.

Good luck everyone.

Murali

[Chetan_Tiwary_]

Hello @IBM-Murali !

Many congratulations on your EX188 certification ! 

Highly recommend you to explore other courses for next certifications like DO280 / DO288 based on your OpenShift skill path choice. 

Please let us know if you need any help or any info on the same. 

[IBM-Murali]

Hello @Chetan_Tiwary_ 

Thank you.  I did complete the DO280 course online and took the exam EX280.  Unfortunately I did not pass.  There seems to be a big config mistake that I made (not sure what) which showed 0% for most of the tasks. May be I logged in as kubeadmin user but should have logged in as some body else I don't know.

Also the material covers a vast area and found difficult to remember the yaml file syntaxes/ pv/ pvc setups etc etc.  Hope to retake the exam again after hearing from Red Hat.

Thanks.

[Travis · Accepted solution]

@IBM-Murali -

There are lots of YAML things to remember. Luckily there are some OC commands that can help you with getting the "skeleton" or sample YAML files. The GUI can also show you the resources too. 

There are several posts here on RHLC showing things like oc explain and oc describe and how you can leverage that information as triggers for the exam and formatting your YAML files.

There are examples everywhere in the community like here: https://learn.redhat.com/t5/Containers-DevOps-OpenShift/Failed-2-times-on-EX380/td-p/25388/page/2

=========== Excerpt of some examples =============

1. I use this command to search for specs, it's way more efficient than looking through the documentation PDFs or minimalistic UI YAML templates:

$ oc explain <something> --recursive

2. An OpenShift cluster contains resources, which can be used as examples in the tasks:

$ oc get <something> -A

$ oc get <something> -n <project name> -o yaml > example.yaml

3. Use "yaml-lint" to validate YAML files and "jq" for JSON files. 

4. Hardcode this .vimrc string into your memory and use it whenever you edit YAML:

autocmd FileType yaml setlocal ai ts=2 sw=2 et cuc

5. Vim has ":retab" command, which replaces tabs with spaces.  Tabs may appear when you copy/paste YAML code from the documentation. Close and re-open your yaml file, execute ":retab", close and re-open again.

======== End Excerpt of post ==========

Lots of other discussions similar to the above for help with YAML, so that should get you started.

[IBM-Murali]

Hello @Travis 

Thanks for the helpful pointers.  Really appreciate it.

Murali

[Chetan_Tiwary_]

Thanks @Travis for the insights ! 

[AlessandraS]

Hi Travis,
I tried "yaml-lint" on my terminal but doesn't work

and could you explain me 4) ? should I be able to open a yaml file with command vimrc instead of vim?

Thanks

[Travis]

@AlessandraS -

There is no YAML LINT command installed or available on this machine. Often packages are not installed but you can install anything you want in our classroom environment if it is a package that is part of the RHEL base channels meaning it is in the BASEOS or AppStream. If it is 3rd party package from a repo like EPEL, you wouldn't be able to easily install in our classroom environment. 

So based on my above comments and answers, you might need to install the package with a "dnf install" to use it. We have begun including jq on many of our builds by default and yaml-lint on some, but again, if it isn't installed, you can always install the package.

As for your last question ...

Should I be able to open a yaml file with command vimrc instead of vim?

The answer is no. .vimrc is a resource file where you can setup defaults and describe how you want vim to work. It is not an editor, but more like a configuration and settings file for an editor. As an instructor I used to teach a bunch of Ansible courses and dealt with YAML there exclusively so showed students all types of tricks to make things easier. A .vimrc file can assist in YAML editing because you can change tab stops to spaces, setup things like color columns, and most importantly default those settings to specific file types. There are also many VIM plugins I have in my actual development environment that can extend VIM further allowing VSCode-like and other IDE-like functionality.

[hady_helayel]

congrats. my exam is tomorrow. i hope i pass. Are the labs in DO188 enough to pass?

[Wasim_Raja]

@IBM-Murali Many congratulations!!