[Ingest Manager] Support for linux/arm64

[michalpristas]

What does this PR do?

Just adds a correct arch for arm64 so arm64 beats are downloaded.
Tested on AWS arm64 server, dashboards seemed ok.

Why is it important?

support Arm 64 packages

How to test

Ideally you have an arm64 device or libvirt enabled and it's easy.
What i did is that I

• built binary using DEV=true SNAPSHOT=TRUE PLATFORMS="linux/arm64" mage package command
• used my AWS subscription to spin-up ARM64 Ubuntu server,
• scp-ed arm packaged there
• ssh, untar and clear data/elastic-agent-*/downloads directory
• install with fleet 8.0.0-SNAPSHOT
• everything should be ok and dashboards populated

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/ingest-management (Team:Ingest Management)

[elasticmachine]

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Build stats

• Build Cause: Pull request #23479 updated

• • Start Time: 2021-01-15T08:30:02.218+0000

• Duration: 21 min 8 sec

• Commit: ac1e08d

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Test	Results
Failed	0
Passed	1426
Skipped	4
Total	1430

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Test stats 🧪

Test	Results
Failed	0
Passed	1426
Skipped	4
Total	1430

[ph]

/Package

[blakerouse]

Looks good.

[ph]

@nkammah Do this need change in the release manager or you will handle all the change at once?

@ferullo Do you have linux arm effort on your side?

[ferullo]

Endpoint is not adding Linux ARM support for the time being.

[nkammah]

@jmlrt may I let you respond to PH's question

[ph]

@jmlrt @nkammah Just to be clear all the beats will also have arm 64 binaries, this was part of the global effort to have them.

[elasticmachine]

Pinging @elastic/agent (Team:Agent)

[michalpristas]

I looked into infra code @ph and there are changes which needs to be done yeah. this PR just makes sure agent is ok with arm, arm binary wont be published with this going in.
i identified few places which need to be updated in infra code so after i get this in i will work on infra side

[jmlrt]

@nkammah Do this need change in the release manager or you will handle all the change at once?

Yes, as mentionned above, this will require changes in release-manager DSL.
@michalpristas, that would be great if you can create the PR to infra repo and I can work with you if there you have some question.

[michalpristas]

i added contraints section which is basically a when section eql expression, evaluated before transformations to save some time.
runtime.os/arch were injected into a tree beforehand, so far as a separate keys not a map, we need to add support for accessing dict elements in eql expression
cc @blakerouse as you already approved the PR

[ph]

Small question, we are adding a new key "constraints", could this be handled already by the "when" key?

[michalpristas]

it could but it would mean we do the transformation which are not even necessary and then filter out all of the results because precondition failed. i wanted us to spare compute cycles

[blakerouse]

Perfect usage of EQL conditions, awesome!

[ph]

@blakerouse and @michalpristas Its exciting to see EQL syntax reused in other places!