kling db

Every test, its own database.

kling db

A copy is a microVM born from a golden with Postgres already warm. Each one has its own password, known only to the host.

kling db golden -script scripts/db-golden.sh build -template crm-demo pg   # the template, once
kling db up pg -name t1          # a ready copy, with its key
kling db connect t1 -psql        # psql from the host
kling db fork t1 -n 4            # 4 copies of t1 as it is right now; all or nothing
kling db reset t1                # t1 comes out of the template again
kling db rm t1

Many at once

64 out of 64 kling db up at once in 4.6 s, ~14 MiB of memory per copy. Measured with the AuraCRM golden.

One copy per student

kling db class -n 30 -prefix alumno crm-demo      # alumno-01 … alumno-30
kling db class reset -prefix alumno               # next exercise
kling db class rm -prefix alumno

Keys are not printed: -passwords FILE writes them to a 0600 file.

More engines

Engine	What works
Postgres 16/17	everything
MariaDB	up, fork, connect, rotate, reset, rm, branch, doctor, audit
Redis, SQLite	up, fork, connect, reset, rm, doctor

Next

• Goldens and images with extensions
• One database per git branch
• Share a copy with another agent
• doctor, diff and rehearse

In the repo: docs/db.md · ext/db · docs/mysql.md · docs/db-engines.md · docs/db-ask.md