page:migrate:azure database for postgresql:text search over records

Migrate Azure Database for PostgreSQL: Text search over records

Move PostgreSQL data from Azure Database for PostgreSQL to Ample, one component at a time. Destination verified on Ample: a generated tsvector column with a GIN index, ranked websearch queries and a negative query returning nothing (search=ok). Source procedure: Take a logical backup with pg_dump -Fc from an allowed network or private endpoint. Not migrated automatically: Microsoft Entra authentication, zone-redundant HA and PITR have no equivalent on the managed database. Cutover: Freeze writes with the user's go-ahead, take the final dump, restore, validate, redeploy with the managed DATABASE_URL, keep the Azure server until confirmed. Rollback: keep the source untouched until you confirm; nothing at the source is changed or deleted by this guide.

Representative Queries

Migration Details

Prerequisites

  1. Authorized access to the Azure Database for PostgreSQL source and its export tooling
  2. An inventory of every component in scope and out of scope
  3. A validated backup or copy before any cutover
  4. An Ample account token with servers:write, databases:read

Tested Configuration

Template Runtime Size Install Build Start
node-22 node s-1vcpu-1gb npm install npm run build --if-present npm run start

Workflow Steps

  1. Inventory the source: List what Azure Database for PostgreSQL provides beyond the component you are moving. Out of scope here: Microsoft Entra authentication, zone-redundant HA and PITR have no equivalent on the managed database.
  2. Source step 1: Take a logical backup with pg_dump -Fc from an allowed network or private endpoint.
  3. Source step 2: Check the engine major version, extensions and server parameters the app depends on.
  4. Source step 3: Restore into a scratch managed database first and compare row counts.
  5. Provision and restore: Deploy the app once so a managed PostgreSQL 16 database exists (or create one with ample database create --engine postgres), then restore the dump with pg_restore using its connection string; keep migrations idempotent.
  6. Validate before cutover: Run the app's own checks and, for data, compare counts and checksums; the example checks are the pattern self-tests (/p/text-search-over-records).
  7. Cut over: Freeze writes with the user's go-ahead, take the final dump, restore, validate, redeploy with the managed DATABASE_URL, keep the Azure server until confirmed.
  8. Rollback: Point DNS or configuration back to the source. The source was never modified; deletion is a separate, user-executed step after validation.

Success Checks

Limitations

Cost Estimate

Components Breakdown

Name Size Quantity Monthly Amount
app server s-1vcpu-1gb 1 5.0
managed PostgreSQL database s-1vcpu-1gb 1 5.0

Evidence Summary

Next Actions