[O11y][Redis] Migrate Key Metrics dashboard visualizations to lens in kibana 8.3.0

[harnish-elastic]

• Enhancement

What does this PR do?

• Migrate visualizations to lens for Redis integration package

• Statistics for Redis Lens migration:

Redis dashboard	Before Migration		After Migration
	Lens	Visualization	Lens	Visualization
[Metrics Redis] Keys	0	5	5	0

Checklist

• I have added an entry to my package's changelog.yml file.
• I have verified that panels are populated with data.
• I have verified that panels are not distorted after being migrated to lens.
• I have updated screenshots of dashboard.
• I have verified that data count are matching and panel aggregations are same as before.

Author's checklist

• Migrated panels should be removed from visualization folder.
• Migrated visualizations are populating in Kibana version 8.3.0.

Related issues

• Relates Lens Migration of OBS integrations #5221

Issues Identified

• Splitting a chart into multiple smaller charts by a breakdown dimension is not supported in the lens.
  [Lens] Support small multiples / facet / trellis for XY and Partition charts kibana#72063
  • Impact : [ Severity : Critical, Workaround : Yes]

[elasticmachine]

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• Start Time: 2023-04-11T09:05:09.813+0000

• Duration: 13 min 53 sec

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Name	Metrics % (covered/total)	Diff
Packages	100.0% (1/1)	💚
Files	100.0% (1/1)	💚 50.0
Classes	100.0% (1/1)	💚 50.0
Methods	66.667% (14/21)	👎 -3.333
Lines	94.186% (81/86)	👍 23.952
Conditionals	100.0% (0/0)	💚

[harnish-elastic]

Since we have confirmation on work-around of split series charts by Subhrata, putting this PR into draft.

[rajvi-patel-22]

@SubhrataK , The two panels that were blocked in the Redis integration can be migrated as per the discussion that we had on split series functionality.

In Lists length [Metrics Redis] visualization, we found that the fields used in both split series functionality use different sizes (i.e. 16, 20 respectively) as highlighted in below screenshot. So it will show total 16*20=320 line charts (Top 16 values of redis.keys.id and Top 20 values of redis.key.name for each 16 redis.keys.id)!

However this is not the case in Lens. We use breakdown functionality in Lens to tackle this issue but in that we can specify only one size for both fields. For example if we provide 20 then it will show top 20 line chart for combined field of redis.keys.id + redis.keys.name. So while migrating this panel in lens, should we provide 320 (which will show 320 line charts and IMO it would become tough for the user to interpret the information) or should we provide the small number (for example 20 which will show user just top 20 charts)

And should we enable group other functionality in the lens visualization? it will group all the other values in separate bucket and provide one line chart for that.

[SubhrataK]

@rajvi-elastic As discussed, please change it to display Top 10 values only.

[harnish-elastic]

@agithomas Updated the PR with suggested changes. Thanks!

[agithomas]

@SubhrataK , can we have your input on the discussion?

[harnish-elastic]

@SubhrataK , can we have your input on the discussion?

@agithomas For this discussion, @SubhrataK has provided her comments over here. But @SubhrataK can provide more information around it if it's needed.

[agithomas]

LGTM!

[elasticmachine]

Package redis - 1.8.0 containing this change is available at https://epr.elastic.co/search?package=redis