Ultimate Guide: How to Migrate Drupal 7 To Drupal 8

Please check that stable Modules in Drupal 7 are also available in Drupal 8 or not.

Once your installation setup is completed into localhost. This Drupal 8 site will be used as the destination site for the migration process. Tip: Please build the website in the local environment.

Migrate: – Migrate module provides a flexible framework for Drupal 7 to Drupal 8 content migration

Migrate Drupal: – Migrate Drupal module provides the capabilities for importing content from Drupal 7 to Drupal 8

Migrate Drupal UI:-  This module provides below mention characteristics

1) Show a list of migrations that can be filtered by migration tags
2) Create new migrations from scratch
3) Edit and delete existing migrations.
4) Configure advanced process pipelines, E.g. configures the process plugins for each field.
5) Build migration templates into migration config entities.

Please refer to the below screenshot for more details

www.example.com/upgrade

Once the Migrate module is enabled, you need to navigate to the upgrade path. Further steps will be available on the upgrade path to proceed. So, read and follow the migration steps carefully. Then press the continue button and open the migration screen. Please refer to the image below.

Step 5 – Make Sure That Access To The Database Of Drupal 7 Is Available From Drupal 8 Site

Before performing the migration, you must check that you have full access to your Drupal 7 database and private files that you want to migrate to the Drupal 8 website.

Step 6 – If The Old Site Has Private Files, Copy Its File’s Directory And That Must Also Be Accessible On The Host Of Drupal 8 Site

You must enable the permission in your drupal7 private files that can be accessible in drupal8 sites.

Step 7 – Enable All Modules On Drupal 8 Site That Are Enabled On Drupal 7 Site.

For example, if the old site uses the mark-up module, then enable the mark-up module on the new site so the existing data can be imported easily.

Step 8 – Do Not Add New Content To The New Site Before Migration. Any Existing Content Will Be Overwritten In The Migration Process.

Please make sure that you don’t add any new content before migrating the database. You can always add the content after the successful migration to the new version

Step 9 – Put Drupal 8 Site Into Maintenance Mode

Go to.
-admin/config/development/maintenance
-Save Configuration.

Step 10 – Continue The Upgrade Process

Once you click perform upgrade button it will start migrating from Drupal 7 to Drupal 8.

Step 11 – Start The Migration

The migration process will take some time, depending on the size of the website. In case of errors, just reload the web page.

Once it is completed successfully you will be able to see the below screen.

Finish….

This process is very simple and can be done easily with some technical knowledge by using Drupal modules & configurations.

Second Approach….

Before performing the migration, you must check that you have full access to your Drupal 7 database and private files that you want to migrate to the Drupal 8 website.

You must enable the permission in your drupal7 private files that can be accessible in drupal8 sites.

For example, if the old site uses the mark-up module, then enable the mark-up module on the new site so the existing data can be imported easily.

Please make sure that you don’t add any new content before migrating the database. You can always add the content after the successful migration to the new version.

Go to.
-admin/config/development/maintenance
-Save Configuration.

Once you click perform upgrade button it will start migrating from Drupal 7 to Drupal 8.

The migration process will take some time, depending on the size of the website. In case of errors, just reload the web page.

Once it is completed successfully you will be able to see the below screen.

Finish….

This process is very simple and can be done easily with some technical knowledge by using Drupal modules & configurations.

Second Approach….

Let’s initiate Drupal 7 to Drupal 8 migration using Drush command.

Please install the composer first by using the below command.

Command : “composer install”

If you have already installed the composer, make sure it’s updated. If it’s not updated, then you can update the composer using below command.

Command :
“composer update”

If your Composer doesn’t have Drush listed as a dependency, you can install Drush from the command line as follows

Command:
“composer require drush/drush”

Make sure your Drush version is up to date

You can check your drush version with the following command.

Command:-

“drush –version”

Now start your migration with following drush command

Command

“drush ://user:password@server/db — ://example.com –configure-only”

Replace below mention value with your values in the above command

-‘user’ is the username of the source database

-‘password’ is the source database user’s password

-‘server’ is the source database server

-‘db’ is the source database

After migration, check migration status with the following command
Command:-
“drush migrate-status”

To check the migration list, please use the following command
Command
“drush migrate-import –all”

Go to the structure->migration

Check the migration group ‘import from drupal 7’ list migration and useful data will import it.

After clicking on list migration button all upgraded data will be visible. Click to the execute button and data will be imported.

Once you click on the execute button, you will be redirected to the page with below mention options.

Import: –

Imports all previously unprocessed records from the source, plus any records marked for the update, into destination Drupal objects.

Rollback: –

Deletes all Drupal objects created by the import

Stop: –

Please stop any import or rollback processes that may currently be running.

Reset: –

Sometimes a process may fail to stop, and be left stuck in an Importing or Rolling Back status.

You can select the options and execute the process as per your requirement and your migration will be completed.

Done!!!

Please compare manually a few of your Drupal 7 contents with Drupal 8 to verify.

If you follow the above mention steps carefully, you can easily migrate your site.

If you are looking for Drupal Guide please refer to the link Getting Started With Drupal.