Erich Blume eec1edf43d Add how-to guide for connecting to PostgreSQL via psql (#188 )

## Summary
- Add new how-to guide (`connect-to-postgres.md`) with the `psql` command using `op read` for 1Password credentials
- Add "Database" section to the how-to index linking to the new guide
- Link the new guide from the PostgreSQL reference card's Related section

## Test plan
- [x] Verified `psql` connection works from gilbert using the documented command
- [ ] Review doc formatting and content

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Reviewed-on: https://forge.ops.eblu.me/eblume/blumeops/pulls/188

2026-02-14 07:18:06 -08:00

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PostgreSQL

Database cluster via CloudNativePG operator.

Quick Reference

Property	Value
URL	`tcp://pg.ops.eblu.me:5432`
Metrics	`http://cnpg-metrics.tail8d86e.ts.net:9187/metrics`
Namespace	`databases`
Cluster	`blumeops-pg`
Operator	CloudNativePG

Databases

Database	Owner	Purpose
miniflux	miniflux	miniflux feed data
teslamate	teslamate	teslamate vehicle data

Users

User	Role	Purpose
postgres	superuser	CNPG internal
miniflux	app owner	Owns miniflux database
teslamate	superuser	TeslaMate (needs extensions)
eblume	superuser	Admin access
borgmatic	pg_read_all_data	[[borgmatic

Backup

Backed up via borgmatic postgresql_databases hook. Streams pg_dump directly to Borg (no intermediate files, no downtime). See backup for overall backup policy.

Credentials

1Password items:

guxu3j7ajhjyey6xxl2ovsl2ui - eblume password
mw2bv5we7woicjza7hc6s44yvy - borgmatic password

CNPG-managed secrets:

blumeops-pg-app - miniflux user
blumeops-pg-eblume - eblume superuser
blumeops-pg-borgmatic - borgmatic backup user
blumeops-pg-teslamate - teslamate user

connect-to-postgres - How to connect via psql
miniflux - Feed reader database
teslamate - Vehicle data database
borgmatic - Database backup

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