Added Tests to Kubevirt-Tutorials

[jparrill]

• Added testing over actual MD files with Literate Programming (mdsh)

• Created the entrypoint for Build and Testing over a Makefile

  • Build will generate the scripts from Markdown files and put all of them on build/ folder
  • Tests will:
  • Create a K8s cluster on a DIND job over Prow platform
  • Deploy the laboratory using our Ansible playbooks (in order to test also the playbooks)
  • Execute all files (from build step) which will emulate a student executing the labs in a row
  • The test execution will report the results in 2 ways, the first one will cover the whole script file (1 lab) and is something like:

    -------
    Test Name: lab006
    Test Result: PASS
    Test Expected Result: PASS
    Real Time: 34.008

    The second one is a log execution of the lab itself which will contain this format (for every command executed in the lab):

    Command: while ! kubectl get deployment cdi-operator -n cdi --no-headers && echo 'Looping...'; do sleep 5; done
    Output:
    cdi-operator   1/1   1     1     66s
    Time: 0.247

  • At the end of the tests execution you will get a sumarization of all the tests:

    -------
    Tests Done: 11
    Tests on Passed state: 11
    Tests on Error state: 0

  • If there are an error on a lab, the Prow job will finish on Error

• Lab tests logs also are uploaded to GCS in order to store the results

  • ${ARTIFACTS}/logs

• Some labs has been modified in order to be well tested

• test_lab script has been created in order to be modular, test_lab will be summoned from make tests

• Lab MD files has been renamed from lab9.md to lab009.md for scripting purposes

• Removed some ```console headers in order to follow mdsh way of work

• Retry policy (just one time) in order to avoid platform errors.

• Real time over all the commands executed and also summarized to allow the admins to find bottlenecks or errors on Lab execution.

This is an sample execution over Prow platform:

...
...
make[1]: Leaving directory '/workspace/kubevirt-tutorial'
-------
Test Name: lab000
Test Result: PASS
Test Expected Result: PASS
Real Time: 0
-------
Test Name: lab001
Test Result: PASS
Test Expected Result: PASS
Real Time: .517
-------
Test Name: lab002
Test Result: PASS
Test Expected Result: PASS
Real Time: .781
-------
Test Name: lab003
Test Result: ERR
Test Expected Result: PASS
Real Time: 221.473
Retrying Test...
-------
Test Name: lab003
Test Result: PASS
Test Expected Result: PASS
Real Time: 9.951
-------
Test Name: lab004
Test Result: PASS
Test Expected Result: PASS
Real Time: 94.851
-------
Test Name: lab005
Test Result: ERR
Test Expected Result: PASS
Real Time: 9.028
Retrying Test...
-------
Test Name: lab005
Test Result: PASS
Test Expected Result: PASS
Real Time: 2.589
-------
Test Name: lab006
Test Result: PASS
Test Expected Result: PASS
Real Time: 34.008
-------
Test Name: lab007
Test Result: PASS
Test Expected Result: PASS
Real Time: 0
-------
Test Name: lab008
Test Result: PASS
Test Expected Result: PASS
Real Time: 2.223
-------
Test Name: lab009
Test Result: PASS
Test Expected Result: PASS
Real Time: .258
-------
Test Name: lab010
Test Result: PASS
Test Expected Result: PASS
Real Time: 0
-------
Tests Done: 11
Tests on Passed state: 11
Tests on Error state: 0
+ EXIT_VALUE=0
+ set +o xtrace
Cleaning up after docker in docker.
================================================================================
[Barnacle] 2019/07/11 10:08:41 Cleaning up Docker data root...
[Barnacle] 2019/07/11 10:08:41 Removing all containers.

[jparrill]

/kind enhancement

[iranzo]

/cc ptrnull

[kubevirt-bot]

@iranzo: GitHub didn't allow me to request PR reviews from the following users: ptrnull.

Note that only kubevirt members and repo collaborators can review this PR, and authors cannot review their own PRs.

In response to [this](https://github.com/kubevirt/kubevirt-tutorial/pull/105#issuecomment-510435384): >/cc ptrnull Instructions for interacting with me using PR comments are available [here](https://git.k8s.io/community/contributors/guide/pull-requests.md). If you have questions or suggestions related to my behavior, please file an issue against the [kubernetes/test-infra](https://github.com/kubernetes/test-infra/issues/new?title=Prow%20issue:) repository.

[iranzo]

Please rebase @jparrill

[iranzo]

/lgtm

[kubevirt-bot]

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