[Ingest Manager] Elastic Agent - Endpoint e2e test fix

[michalpristas]

What does this PR do?

This PR uses CN together with DNSName,
in nightly test we see that when agent is assigned an Endpoint Security integration it wont show up in Security App.
I was not able to get more info from Endpoint so far but what i see is a message AgentComms.cpp:628 Waiting for GRPC connection to be READY for. really long period of time.

Agent wise we are not experiencing any errors,
Creds endpoint created a LISTENING
I see endpoint connecting to Creds endpoint and not issues there server side.

But when i change generated cert to have CN as addition to DNSNames, endpoint is ready in 20s and Endpoint reported green, showing up in security tabs. I did multiple runs, mutiple build always same behavior.
I suspect gdpr library to do some checks on CN so while golang stopped supporting CN and we moved to DNSNames we probably need to keep CN for a while

Why is it important?

#23693

Checklist

• My code follows the style guidelines of this project
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• I have made corresponding change to the default configuration files
• I have added tests that prove my fix is effective or that my feature works
• I have added an entry in CHANGELOG.next.asciidoc or CHANGELOG-developer.next.asciidoc.

[elasticmachine]

Pinging @elastic/agent (Team:Agent)

[elasticmachine]

Pinging @elastic/ingest-management (Team:Ingest Management)

[michalpristas]

/Package

[elasticmachine]

💚 Build Succeeded

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Build stats

• Build Cause: Pull request #23776 opened

• • Start Time: 2021-02-01T12:25:08.265+0000

• Duration: 28 min 43 sec

• Commit: 3514ff7

Test stats 🧪

Test	Results
Failed	0
Passed	5846
Skipped	16
Total	5862

Steps errors

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x-pack/elastic-agent-windows-2016-windows-2016 - Install Go/Mage/Python 1.15.7

• Took 0 min 10 sec . View more details on here
• Description: .ci/scripts/install-tools.bat

💚 Flaky test report

Tests succeeded.

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Test stats 🧪

Test	Results
Failed	0
Passed	5846
Skipped	16
Total	5862

[ph]

@michalpristas Can you clarify the description of this PR, is that working at intended? is there a bug with endpoint?

[blakerouse]

This must have to do with the switch to go 1.15. Some reason the certificate generation changes that cause endpoint to stop connecting. I would be surprised this was a change on the Endpoint side.

[michalpristas]

@ph i think it's something related to gdpr library, they use one from google. i was asking in a channel but so far no response about how to gather details or anything helpful endpoint side.

[michalpristas]

/Packaging

[ph]

Thanks @michalpristas for the clarification, I think @blakerouse is right here concerning the 1.15 changes.

[v1v]

/packaging

[mdelapenya]

/packaging

[mdelapenya]

Good catch!