{"catalogRevision":"cat_f13ab9a494120b5e","recipeId":"page:migrate:heroku-postgres:transactional-workflows","recipeRevision":"r1","canonicalPath":"/migrate/heroku-postgres/transactional-workflows","label":"Migrate Heroku Postgres: Transactional workflows","family":"Migration guide","summary":"Move PostgreSQL data from Heroku Postgres to Ample, one component at a time. Destination verified on Ample: an optimistic version check and an event row written in the same transaction, a stale update rejected, and a history query over the application-owned events (history=2 conflict=rejected). Source procedure: Take a logical backup with `heroku pg:backups:capture` and download it, or `pg_dump -Fc` against the credentials from `heroku pg:credentials:url`. Not migrated automatically: Heroku Postgres followers, forks, rollback (PITR) and dataclips have no equivalent on the managed database. Cutover: Put the app in maintenance mode with the user's go-ahead, take the final backup, restore, validate, redeploy with the managed DATABASE_URL, keep the Heroku database until confirmed. Rollback: keep the source untouched until you confirm; nothing at the source is changed or deleted by this guide.","representativeQueries":["Migrate Heroku Postgres: Transactional workflows","Where can I host Transactional workflows?","I need a component-scoped export/import or reconfiguration procedure for Transactional workflows, with compatibility checks, verification and rollback."],"breadcrumbIds":["discovery","migration","migration:postgres-sources","migration:heroku-postgres","page:migrate:heroku-postgres:transactional-workflows"],"breadcrumbs":[{"id":"discovery","label":"Agent hosting discovery","canonicalPath":"/discover/discovery","kind":"root"},{"id":"migration","label":"Migration sources by component","canonicalPath":"/discover/migration","kind":"facet"},{"id":"migration:postgres-sources","label":"Postgres sources","canonicalPath":"/discover/migration/postgres-sources","kind":"group"},{"id":"migration:heroku-postgres","label":"Heroku Postgres","canonicalPath":"/discover/migration/heroku-postgres","kind":"atom"},{"id":"page:migrate:heroku-postgres:transactional-workflows","label":"Migrate Heroku Postgres: Transactional workflows","canonicalPath":"/migrate/heroku-postgres/transactional-workflows","kind":"recipe"}],"parentIds":["migration:heroku-postgres","pattern:transactional-workflows","intent:migrate-postgres"],"parents":[{"id":"migration:heroku-postgres","label":"Heroku Postgres","canonicalPath":"/discover/migration/heroku-postgres","kind":"atom"},{"id":"pattern:transactional-workflows","label":"Transactional workflows","canonicalPath":"/discover/pattern/transactional-workflows","kind":"atom"},{"id":"intent:migrate-postgres","label":"Migrate Postgres","canonicalPath":"/discover/intent/migrate-postgres","kind":"atom"}],"resourceRequirements":["primitive:postgres"],"infrastructureRequirements":[{"primitiveId":"primitive:postgres","label":"Postgres","canonicalPath":"/discover/primitive/postgres","status":"verified","summary":"Managed PostgreSQL 16 runs in its own microVM and is auto-provisioned when an app needs a database and no DATABASE_URL is supplied."}],"workload":"Transactional workflows","migrationSource":"Heroku Postgres","releaseStatus":"published","supportStatus":"verified","executionStatus":"unbound","docsOnly":true,"prerequisites":["Authorized access to the Heroku Postgres source and its export tooling","An inventory of every component in scope and out of scope","A validated backup or copy before any cutover","An Ample account token with servers:write, databases:read"],"testedConfiguration":{"template":"node-22","runtime":"node","size":"s-1vcpu-1gb","install":"npm install","build":"npm run build --if-present","start":"npm run start"},"inputSchema":null,"outputSchema":null,"workflowSteps":[{"title":"Inventory the source","body":"List what Heroku Postgres provides beyond the component you are moving. Out of scope here: Heroku Postgres followers, forks, rollback (PITR) and dataclips have no equivalent on the managed database."},{"title":"Source step 1","body":"Take a logical backup with `heroku pg:backups:capture` and download it, or `pg_dump -Fc` against the credentials from `heroku pg:credentials:url`"},{"title":"Source step 2","body":"Check the Postgres major version and extensions against the managed engine (PostgreSQL 16)"},{"title":"Source step 3","body":"Restore into a scratch managed database first and compare row counts"},{"title":"Provision and restore","body":"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.","command":"ample database create --name <db-name> --engine postgres"},{"title":"Validate before cutover","body":"Run the app's own checks and, for data, compare counts and checksums; the example checks are the pattern self-tests (/p/transactional-workflows)."},{"title":"Cut over","body":"Put the app in maintenance mode with the user's go-ahead, take the final backup, restore, validate, redeploy with the managed DATABASE_URL, keep the Heroku database until confirmed."},{"title":"Rollback","body":"Point DNS or configuration back to the source. The source was never modified; deletion is a separate, user-executed step after validation."}],"examples":[{"title":"Express pattern fixture (destination)","description":"Verified destination basis: transactional workflows.","sourceRef":"tests/deploy-canaries/express-patterns"}],"successChecks":[{"description":"destination app responds on its public URL","kind":"http_get","path":"/","expect":"ample canary express patterns"},{"description":"transactional-workflows check from the destination example","kind":"http_get","path":"/p/transactional-workflows","expect":"see the pattern fixture checks"},{"description":"data or object counts and checksums match the source","kind":"manual","expect":"operator comparison before cutover"}],"limitations":["Documentation only: nothing is executed automatically and no execution binding is offered.","The source-side procedure is documented from Heroku Postgres's standard tooling and was not executed in this catalog's evidence; the destination side was verified with the pattern fixture.","No full source-product parity is claimed: Heroku Postgres followers, forks, rollback (PITR) and dataclips have no equivalent on the managed database.","Verified on the node-22 template at s-1vcpu-1gb; region, compliance and request-duration limits are unknown.","Managed PostgreSQL 16 only; extensions, connection limits and backup or restore procedures on the managed side are not verified beyond the pattern checks."],"costEstimate":{"currency":"USD","monthlyAmount":10.0,"authoritative":true,"basis":"size prices from pricing.toml (loaded by the API) at build revision 7cf090725a6f16dd91af7d28356fe72c1b404d6e","components":[{"name":"app server","size":"s-1vcpu-1gb","quantity":1.0,"monthlyAmount":5.0},{"name":"managed PostgreSQL database","size":"s-1vcpu-1gb","quantity":1.0,"monthlyAmount":5.0}],"note":"Destination always-on monthly price of the tested sizes; apps auto-pause when idle. Source costs are unknown to Ample."},"evidenceSummary":[{"kind":"canary_run","summary":"Destination side verified: the Express pattern fixture deployed on Ample (npm install, npm run build --if-present, npm run start on the node-22 template) and its checks passed (an optimistic version check and an event row written in the same transaction, a stale update rejected, and a history query over the application-owned events (history=2 conflict=rejected)). The source-side export from Heroku Postgres is documented from the vendor's standard tooling and was not executed by this catalog's evidence.","observedAt":"2026-09-21T02:34:39Z","implementationRevision":"1d28ae0 (CLI 0.1.21)","expiresAt":"2027-03-20T02:34:39Z","scope":{"checks":["/p/transactional-workflows"],"destinationOnly":true,"template":"node-22"}}],"lastVerifiedAt":"2026-09-21T02:34:39Z","mcpBinding":null,"unknowns":["region availability is unknown until a verified region fact is recorded","compliance attestations are unknown; none are claimed"],"formats":{"html":"https://ample.computer/migrate/heroku-postgres/transactional-workflows","markdown":"https://ample.computer/migrate/heroku-postgres/transactional-workflows.md","json":"https://api.ample.computer/v1/catalog/recipes/page%3Amigrate%3Aheroku-postgres%3Atransactional-workflows"},"nextActions":[{"actionId":"browse-catalog","label":"Browse the catalog index","operationId":"catalog_index","method":"GET","relativePath":"/v1/catalog","origin":"api","parameters":{},"requiresAuthentication":false,"requiresApproval":false},{"actionId":"search-recipes","label":"Search published recipes by intent, stack and constraints","operationId":"search_recipes","method":"POST","relativePath":"/v1/catalog/search","origin":"api","parameters":{"body":{"limit":5,"query":"Migrate Heroku Postgres: Transactional workflows"}},"requiresAuthentication":false,"requiresApproval":false},{"actionId":"plan:page:migrate:heroku-postgres:transactional-workflows","label":"Prepare a side-effect-free deployment plan for an authorized project","operationId":"plan_deployment","method":"POST","relativePath":"/v1/catalog/plan","origin":"api","parameters":{"body":{"inputs":{},"projectId":"<workspace or server id you own>","recipeId":"page:migrate:heroku-postgres:transactional-workflows","recipeRevision":"r1"}},"requiresAuthentication":true,"requiresApproval":false},{"actionId":"auth-setup","label":"Read the existing agent authentication setup","operationId":"existing_auth_setup","method":"GET","relativePath":"/mcp/setup","origin":"api","parameters":{},"requiresAuthentication":false,"requiresApproval":false},{"actionId":"browse:migration:heroku-postgres","label":"Browse Heroku Postgres","operationId":"browse_node","method":"GET","relativePath":"/v1/catalog/nodes/migration%3Aheroku-postgres","origin":"api","parameters":{"nodeId":"migration:heroku-postgres"},"requiresAuthentication":false,"requiresApproval":false},{"actionId":"browse:pattern:transactional-workflows","label":"Browse Transactional workflows","operationId":"browse_node","method":"GET","relativePath":"/v1/catalog/nodes/pattern%3Atransactional-workflows","origin":"api","parameters":{"nodeId":"pattern:transactional-workflows"},"requiresAuthentication":false,"requiresApproval":false},{"actionId":"browse:intent:migrate-postgres","label":"Browse Migrate Postgres","operationId":"browse_node","method":"GET","relativePath":"/v1/catalog/nodes/intent%3Amigrate-postgres","origin":"api","parameters":{"nodeId":"intent:migrate-postgres"},"requiresAuthentication":false,"requiresApproval":false}]}