[7.8][docs] Backport: Use beatname_pkg variable to resolve package name (#18423)

[dedemorton]

Backports #18423 to 7.8 branch.

[elasticmachine]

Pinging @elastic/integrations-services (Team:Services)

[elasticmachine]

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• Build Cause: [Pull request [7.8][docs] Backport: Use beatname_pkg variable to resolve package name (#18423) #18442 opened]

• Start Time: 2020-05-12T00:01:42.469+0000

• Duration: 40 min 28 sec (2428373)

• Commit: 37d4bb2

[eddieturizo]

@dedemorton Curious to know why we did not back port the doc change to when the underlying code began using heartbeat-elastic ? The 7.6 docs still reflect heartbeat instead of heartbeat-elastic. Am I missing something?

[dedemorton]

@eddieturizo Typically we only backport changes to versions that we are actively maintaining. If you look at the older version of the docs, you'll see "IMPORTANT: No additional bug fixes or documentation updates will be released for this version."

Having said that...maybe this change is important enough to backport anyhow.

[eddieturizo]

@dedemorton Thank you for calling my attention to that. I strongly advocate we back port the changes to match the source code. The way the docs exist today, we are (incorrectly) asking users to invoke:

systemctl start heartbeat

in the 7.6 docs [0] when it should really be:

systemctl start heartbeat-elastic

Please re-consider.

[0] https://www.elastic.co/guide/en/beats/heartbeat/7.6/running-with-systemd.html

[dedemorton]

Done. We can always do this on a case-by-case basis. Thanks for your input!

[eddieturizo]

Thank you!