Apply database schema changes for Spring Boot

Summary

Schema changes for a Spring Boot app on Ample. Verified on Spring Boot: a --release-command migration ran before activation and its marker was readable by the live app (migrated=release-ok). Build and start: ./mvnw -q -DskipTests package (or the Gradle wrapper) producing one application jar, then java -jar on the jvm-21 template (Temurin JDK 21) with server.port read from PORT.

Representative Queries

• Apply database schema changes for Spring Boot
• Where can I host Apply database schema changes built with Spring Boot?
• I need a framework-specific schema migration and rollback procedure; no managed migration service is assumed.

Prerequisites

• A Spring Boot project (./mvnw -q -DskipTests package (or the Gradle wrapper) producing one application jar, then java -jar on the jvm-21 template (Temurin JDK 21) with server.port read from PORT)
• A PostgreSQL driver reading DATABASE_URL at runtime
• An Ample account token with servers:write, databases:read

Workflow Steps

1. Build and start

   ./mvnw -q -DskipTests package (or the Gradle wrapper) producing one application jar, then java -jar on the jvm-21 template (Temurin JDK 21) with server.port read from PORT; the server must bind 0.0.0.0 on PORT.

2. Run migrations as the release command

   Ample runs the command before activation and fails the release if it exits non-zero; keep migrations idempotent.
   Command: ample deploy . --name --public --release-command "python3 migrate.py"

3. Verify

   Fetch the live URL and /p/migrated on the example; on failure, read the build and runtime logs.
   Command: ample logs --kind build

Success Checks

• App responds on its public URL
• Migrated check from the example

Limitations

• Verified on the jvm-21 template at s-1vcpu-2gb; other sizes and Spring Boot major versions are not verified.
• Region, compliance attestations, and request-duration limits are unknown and not claimed.
• Managed PostgreSQL 16 only; extensions, connection limits, and backup or restore procedures are not verified.

Cost Estimate

• Currency: USD
• Monthly Amount: $10.00
• Basis: size prices from pricing.toml (loaded by the API)

Components

• App server: s-1vcpu-1gb (1.0) - $5.00
• Managed PostgreSQL database: s-1vcpu-1gb (1.0) - $5.00

Next Actions

1. Browse the catalog index - GET /v1/catalog
2. Search published recipes - POST /v1/catalog/search
3. Prepare a deployment plan - POST /v1/catalog/plan
4. Read existing agent authentication setup - GET /mcp/setup

Examples

• Spring Boot pattern fixture
  Verified schema changes on Spring Boot. Source: tests/deploy-canaries/spring-boot-patterns