Case Study of Migrating a Legacy System into Drupal8. Migration in Drupal 8 Core. D6 to D8 migration. D7 to D8 migration. Migrating from JSON and CSV datas. Migrate Source Plugin Why or When we need to write Migrate Source plugin? How to Write Migrate source plugin? Migrate Process Plugin Why or When we need to write Migrate Process plugin? How to Write Migrate Process plugin? Migration using Drush.

1. Migrate Everything into Drupal 8

2. Contents:
• Migration in Drupal 8 Core
• D7 to D8 migration
• Migrating from JSON and CSV data
• Migrate Source Plugin
• Migrate Process Plugin
• Migration using Drush

3. Migration in Drupal 8 core
• Modules list:
• core
• migrate
• migrate_drupal
• migrate_drupal_ui
• contributed
• migrate_plus
• migrate_tools
• migrate_upgrade
• migrate_source_csv

4. D7 to D8 migration

5. Migrating from JSON and CSV data

6. Migrate Source Plugin

7. Migrate Process Plugin

8. Migration using Drush
• Command lists:
• migrate-status (ms) - Lists migrations and their status.
• migrate-import (mi) - Performs import operations.
• migrate-rollback (mr) - Performs rollback operations.
• migrate-stop (mst) - Cleanly stops a running operation.
• migrate-reset-status (mrs) - Sets a migration status to Idle
if it gets stuck.
• migrate-messages (mmsg) - Lists any messages associated with
a migration import.