enable ALL for TARGET_CONTAINER

[MichaelMorrisEst]

What this PR does / why we need it:
Enables the user to specify ALL for TARGET_CONTAINERS to execute against all containers in the pods in parallel execution

Which issue this PR fixes
Closes #682

Special notes for your reviewer:

Checklist:

• Fixes #
• PR messages has document related information
• Labelled this PR & related issue with breaking-changes tag
• PR messages has breaking changes related information
• Labelled this PR & related issue with requires-upgrade tag
• PR messages has upgrade related information
• Commit has unit tests
• Commit has integration tests
• E2E run Required for the changes

[ispeakc0de]

LGTM, have you tested this PR?

[MichaelMorrisEst]

Hi @ispeakc0de

Yes, I have tested.

When I use a specific container name ("hello-world-2"), I see in the logs that specific container being targeted:

time="2024-03-04T00:11:23Z" level=info msg="Helper Name: container-kill"
time="2024-03-04T00:11:23Z" level=info msg="[PreReq]: Getting the ENV variables"
time="2024-03-04T00:11:23Z" level=info msg="Injecting chaos on target: {name: ahoy-hello-world-778f6696cb-sqfjp, namespace: litmus, container: hello-world-2}"
time="2024-03-04T00:11:23Z" level=info msg="[Info]: Details of application under chaos injection" RestartCountBefore=49 PodName=ahoy-hello-world-778f6696cb-sqfjp ContainerName=hello-world-2

When I use "ALL" for the container name, I see both the containers in the pod being selected:

time="2024-03-04T00:15:52Z" level=info msg="Helper Name: container-kill"
time="2024-03-04T00:15:52Z" level=info msg="[PreReq]: Getting the ENV variables"
time="2024-03-04T00:15:52Z" level=info msg="Injecting chaos on target: {name: ahoy-hello-world-778f6696cb-sqfjp, namespace: litmus, container: hello-world}"
time="2024-03-04T00:15:52Z" level=info msg="Injecting chaos on target: {name: ahoy-hello-world-778f6696cb-sqfjp, namespace: litmus, container: hello-world-2}"
time="2024-03-04T00:15:52Z" level=info msg="[Info]: Details of application under chaos injection" RestartCountBefore=0 PodName=ahoy-hello-world-778f6696cb-sqfjp ContainerName=hello-world
time="2024-03-04T00:15:52Z" level=info msg="[Info]: Details of application under chaos injection" RestartCountBefore=49 PodName=ahoy-hello-world-778f6696cb-sqfjp ContainerName=hello-world-2

[neelanjan00]

@MichaelMorrisEst can you please rebase the branch?

[MichaelMorrisEst]

@MichaelMorrisEst can you please rebase the branch?

No problem @neelanjan00 , rebased there now

[neelanjan00]

@ispeakc0de are we good to merge?