Support IPv6 on e2e StatefulSet tests

[aojea]

What type of PR is this?

Uncomment only one /kind <> line, hit enter to put that in a new line, and remove leading whitespaces from that line:

/kind api-change
/kind bug
/kind cleanup
/kind design
/kind documentation

/kind failing-test

/kind feature
/kind flake

What this PR does / why we need it:

It adds IPv6 support to the [sig-apps] StatefulSet [k8s.io] Basic StatefulSet functionality [StatefulSetBasic] tests

Which issue(s) this PR fixes:

Fixes #

Special notes for your reviewer:

Nginx official docker images only listen on IPv4 by default, however, Apache httpd listen in both IPv4 and IPv6 and offers the same functionality for the e2e tests.

xref #70248

Does this PR introduce a user-facing change?:

NONE

[k8s-ci-robot]

Hi @aojea. Thanks for your PR.

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[aojea]

/assign @BenTheElder

[aojea]

/assign @neolit123
/assign @listx
/assign @nikhiljindal

[BenTheElder]

what's the delta in image size? are we using httpd anywhere else in the tests? (pretty sure we use nginx frequently).

[BenTheElder]

/ok-to-test

[neolit123]

/cc @johnSchnake @ClaudiuB

[neolit123]

the name assigned to Httpd22 seems to be NewWebserverImage
but 2.2-alpine is probably older than 2.4-alpine?

[aojea]

yeah, I have to read the test code again, don;t know if is new as in different or new as in newer

[aojea]

/hold

@BenTheElder good catch, the delta is big , almost 9x in my host, however dockerhub only repotrs 40MB for the httpd image 🤔

httpd                                            2-alpine                       48dffa369547        5 days ago          125MB
nginx                                            1.14-alpine                    cafef9fe265b        3 months ago        16MB

let me check if there is another way to use nginx with ipv6 without creating a new image

[aojea]

Grepping for nginx in the test folder I observe that there is a lot of tests using the nginx version. Those tests will fail with IPv6.
I think that the best path is to make nginx dual stack but I´m blocked and the only option I see is to recover this PR #75255 , any ideas?

EDIT

angost seems a good way to move forward :)
#78390

[fejta]

/approve

test/utils change

[fejta]

/approve cancel

Can you actually get someone from sig-apps to review and approve this first? Once you do I can approve the test/utils (and test/e2e/framework) changes.

/assign janetkuo nikhiljindal kargakis mfojtik

[aojea]

/hold
@fejta thanks for approving, will check with the other groups and try to align with the effort done in #78390

[aojea]

/hold cancel

[aojea]

@janetkuo could you review?
Seems that using apache docker images is the easier way to make the tests work for IPv4 and IPv6.

[BenTheElder]

@fejta the changes in tests/e2e/apps are just renames, (s/nginx/webserver/ || s/nginx/httpd/), the functional changes are in the framework code and are just:

• use httpd instead of nginx
• update the static html path mved to match httpd instead of nginx

This looks good to me, thanks!
/lgtm
/approve
/hold

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: aojea, BenTheElder

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Needs approval from an approver in each of these files:

• test/e2e/apps/OWNERS [BenTheElder]
• test/e2e/framework/OWNERS [BenTheElder]
• test/utils/image/OWNERS [BenTheElder]

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[fejta]

/hold cancel