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keycloak/misc/db-compatibility-verifier/README.md
Ryan Emerson ee9f364b8d
Migrations in db-compatibility-verifier-maven-plugin 
Closes #46389

Signed-off-by: Ryan Emerson <remerson@ibm.com>
2026-02-18 20:57:47 +01:00

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Database Compatibility Verifier Maven Plugin

Overview

This Maven plugin is used to verify the database compatibility of Keycloak. It ensures that all database schema changes are explicitly marked as either supported or unsupported by the rolling upgrades feature.

Goals

The plugin provides the following goals:

  • db-compatibility-verifier:snapshot
  • db-compatibility-verifier:verify
  • db-compatibility-verifier:supported
  • db-compatibility-verifier:unsupported

Usage

snapshot - Creates a snapshot of the current database ChangeSets and org.keycloak.migration.migrators.Migration implementations.

This goal is used to create an initial snapshot of liquibase ChangeSets and org.keycloak.migration.migrators.Migration implementations. It creates a supported and unsupported JSON file, specified via the db.verify.supportedFile and db.verify.unsupportedFile property, respectively.

mvn org.keycloak:db-compatibility-verifier-maven-plugin:999.0.0-SNAPSHOT:snapshot  \
  -Ddb.verify.supportedFile=<relative-path-to-create-json-file> \
  -Ddb.verify.unsupportedFile=<relative-path-to-create-json-file> \
  -Ddb.verify.migration.package=org.keycloak.example # Optional java package containing org.keycloak.migration.migrators.Migration implementations

The supportedFile will be created with a record of all known ChangeSets and Migrations. The unsupportedFile will be initialized with empty JSON arrays.

Each file is created with the following JSON format:

{
  "changeSets" : [
    {
      "id" : "<id>",
      "author" : "<author>",
      "filename" : "<filename>"
    }
  ],
  "migrations" : [
    {
      "class" : "<fully-qualified-class-name>"
    }
  ]
}

verify - Verifies that all detected ChangeSets and Migrations are recorded in either the supported or unsupported JSON files.

mvn org.keycloak:db-compatibility-verifier-maven-plugin:999.0.0-SNAPSHOT:verify \
  -Ddb.verify.supportedFile=<relative-path-to-json-file> \
  -Ddb.verify.unsupportedFile=<relative-path-to-json-file>

supported - Adds one or all missing ChangeSets, or Migration, to the supported JSON file

This goal is used to mark a ChangeSet as supported for rolling upgrades.

To mark a single ChangeSet as supported:

mvn org.keycloak:db-compatibility-verifier-maven-plugin:999.0.0-SNAPSHOT:supported \
  -Ddb.verify.supportedFile=<relative-path-to-json-file> \
  -Ddb.verify.unsupportedFile=<relative-path-to-json-file> \
  -Ddb.verify.changset.id=<id> \
  -Ddb.verify.changset.author=<author> \
  -Ddb.verify.changset.filename=<filename>

To mark all missing ChangeSets as supported:

mvn org.keycloak:db-compatibility-verifier-maven-plugin:999.0.0-SNAPSHOT:supported \
  -Ddb.verify.supportedFile=<relative-path-to-json-file> \
  -Ddb.verify.unsupportedFile=<relative-path-to-json-file> \
  -Ddb.verify.changset.addAll=true

To mark a Migration as supported:

mvn org.keycloak:db-compatibility-verifier-maven-plugin:999.0.0-SNAPSHOT:supported \
  -Ddb.verify.supportedFile=<relative-path-to-json-file> \
  -Ddb.verify.unsupportedFile=<relative-path-to-json-file> \
  -Ddb.verify.migration.class=org.example.migration.MigrationExample

unsupported - Adds one or all missing ChangeSets to the unsupported JSON file

This goal is used to mark a ChangeSet as unsupported for rolling upgrades.

To mark a single ChangeSet as unsupported:

mvn org.keycloak:db-compatibility-verifier-maven-plugin:999.0.0-SNAPSHOT:unsupported \
  -Ddb.verify.supportedFile=<relative-path-to-json-file> \
  -Ddb.verify.unsupportedFile=<relative-path-to-json-file> \
  -Ddb.verify.changset.id=<id> \
  -Ddb.verify.changset.author=<author> \
  -Ddb.verify.changset.filename=<filename>

To mark all missing ChangeSets as unsupported:

mvn org.keycloak:db-compatibility-verifier-maven-plugin:999.0.0-SNAPSHOT:unsupported \
  -Ddb.verify.supportedFile=<relative-path-to-json-file> \
  -Ddb.verify.unsupportedFile=<relative-path-to-json-file> \
  -Ddb.verify.changset.addAll=true

To mark a Migration as unsupported:

mvn org.keycloak:db-compatibility-verifier-maven-plugin:999.0.0-SNAPSHOT:unsupported \
  -Ddb.verify.supportedFile=<relative-path-to-json-file> \
  -Ddb.verify.unsupportedFile=<relative-path-to-json-file> \
  -Ddb.verify.migration.class=org.example.migration.MigrationExample