feat: Clustered release 20260421-2022186

[eatondustin1]

Part of https://github.com/influxdata/project-clustered/issues/822.

This adds the release notes and artifacts for the 20260421-2022186 release.

Checklist

• Signed the InfluxData CLA (if necessary)
• Rebased/mergeable
• Local build passes (npx hugo --quiet)

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Suggested reviewers (click to expand)

Based on files changed, consider requesting review from:

InfluxDB 3

Content	Engineering	Product
Core, Enterprise	influxdata/monolith-team	peterbarnett03, garylfowler
Clustered	influxdata/platform-team	ritwika314, sanderson
Cloud Dedicated	influxdata/cloud-single-tenant	ritwika314, sanderson
Cloud Serverless	—	mavarius, garylfowler
Explorer	—	mavarius, peterbarnett03

InfluxDB v2 / v1 / Enterprise v1

Content	Engineering	Product
v2, Cloud (TSM)	influxdata/edge	sanderson, jstirnaman
v1, Enterprise v1	influxdata/edge	sanderson, jstirnaman

Other Products

Content	Engineering	Product
Telegraf	influxdata/telegraf-team	sanderson, caterryan
Kapacitor	influxdata/bonitoo	sanderson, jstirnaman
Chronograf	influxdata/bonitoo	mavarius, caterryan
Flux	—	sanderson, jstirnaman

Shared / Cross-Product

Content	Reviewers
/content/shared/	influxdata/product-managers
API docs	Relevant product team above

[github-actions]

Vale Style Check Results

Metric	Count
Errors	0
Warnings	7
Suggestions	5

Warnings (7)

File	Line	Rule	Message
content/influxdb3/clustered/reference/release-notes/clustered.md	1139	InfluxDataDocs.Spelling	Did you really mean 'ndots'?
content/influxdb3/clustered/reference/release-notes/clustered.md	1143	InfluxDataDocs.Branding	Use 'the Querier' instead of 'the querier'
content/influxdb3/clustered/reference/release-notes/clustered.md	1145	InfluxDataDocs.Branding	Use 'the Querier' instead of 'the querier'
content/influxdb3/clustered/reference/release-notes/clustered.md	1458	InfluxDataDocs.Spelling	Did you really mean 'variabless'?
content/influxdb3/clustered/reference/release-notes/clustered.md	1466	InfluxDataDocs.Spelling	Did you really mean 'autoscale'?
content/influxdb3/clustered/reference/release-notes/clustered.md	1468	InfluxDataDocs.Spelling	Did you really mean 'configs'?
content/influxdb3/clustered/reference/release-notes/clustered.md	1469	InfluxDataDocs.WordList	Use 'import' or 'load' instead of 'ingest'.

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✅ Check passed

[github-actions]

PR Preview Action v1.4.8
🚀 Deployed preview to https://influxdata.github.io/docs-v2/pr-preview/pr-7148/
on branch gh-pages at 2026-04-29 15:19 UTC

[jstirnaman]

@copilot Draft derivative and difference SQL function reference documentation for InfluxDB Clustered