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Warning

This documentation is a work in progress.

Prepare R6 for migration

This migration requires:

  1. An R6 instance be stood up and run concurrently with an existing R5 instance. 
  2. The R5 fedora needs to be made accessible to the server running the R6 instance. (See the fedora migration step below.)
  3. The R6 instance is empty. Run wipeout rake task to clean out R6 database, solr, and fedora.
Code Block
languagebash
# ensure that Fedora, Solr, and the DB are clean
# it will ask you to verify the targets are correct
bundle exec rake avalon:wipeout  

Dump R5 database

Data from your R5 database will be loaded directly into your R6 database then migrated for R6 in a later step. Role_map data will be needed in R6 for the Fedora migrate step, so it needs to be imported first.

Code Block
# This example is for mysql. Adjust as necessary for your R5 database.
mysqldump -u avalonweb -p avalonweb --no-create-info --complete-insert --tables annotations api_tokens bookmarks courses identities ingest_batches playlist_items playlists role_maps  users > /tmp/avalon.r5.dump.sql

Load to R6 database

SSH into your R6 box and load the R5 database dump.

...

Expand
title...Follow these sqlite instructions

Sqllite3 doesn't like mysql dump files so a transformation script needs to be run on it. Download https://raw.githubusercontent.com/dumblob/mysql2sqlite/master/mysql2sqlite, make it executable, and run it on the dump file.

Code Block
chmod +x mysql2sqlite
./mysql2sqlite avalon.r5.dump.sql > avalon.r5.dump.sqlite
 
#then on r6
bundle exec rails dbconsole
sqlite> .read /tmp/avalon.r5.dump.sqlite

".read" returns "memory", which is good.

Clear role_map cache (TODO: fix me)

Rails won't use your newly imported role_map data unless you clear it from cache.

Code Block
languagebash
bundle exec rails c
> Rails.cache.delete("RoleMapHash")

Add users to administrator group as necessary (TODO: is this necessary?)

Code Block
languagebash
bundle exec rails c
> g = Admin::Group.find('administrator')
> g.users += ["archivist1@example.com"]
> g.save!

Migrate Fedora Objects

SSH tunnel or open up your fedora3 server to your new Avalon app:

Code Block
# Choose an available local port to use as a mirror of your fedora3.host:8983 import source
# In this example 9999 is used. It must match the port used in fedora3.yml in the next step
ssh -L 9999:localhost:8983 user@fedora3.host

keep the ssh mirror running in another tab as you do the next steps.

Setup config/fedora3.yml in your Avalon 6 app

The fedora3.yml should work without change, but if you do have trouble, here's an example fedora3.yml for the avalon demo server.

Code Block
development:
  user: fedoraAdmin
  password: <password>
  url: http://localhost:9999/fedora
test:
  user: fedoraAdmin
  password: <password>
  url: http://localhost:9999/fedora
production:
  user: fedoraAdmin
  password: <password>
  url: http://localhost:9999/fedora

...

Run the migration!

You can watch it run on your target avalon by going to <your avalon url>/admin/migration_report .

...

After this command is finished, look through the report and see which items have failed and troubleshoot using the errors listed.

Migrate Database Tables

Code Block
# Run script to map fedora 3 pids in database to newly minted fedora 4 noids
bundle exec rake avalon:migrate:db

...

Delete Failed Bookmarks

Code Block
#This will delete any bookmarks that point to failed items
bundle exec rake avalon:migrate:bookmark_cleanup

...