105 lines
4 KiB
Markdown
105 lines
4 KiB
Markdown
# Database Debugging and Troubleshooting
|
|
|
|
This section is to help give some copy-pasta you can use as a reference when you
|
|
run into some head-banging database problems.
|
|
|
|
An easy first step is to search for your error in Slack or google "GitLab (my error)".
|
|
|
|
---
|
|
|
|
Available `RAILS_ENV`
|
|
|
|
- `production` (generally not for your main GDK db, but you may need this for e.g. omnibus)
|
|
- `development` (this is your main GDK db)
|
|
- `test` (used for tests like rspec)
|
|
|
|
## Nuke everything and start over
|
|
|
|
If you just want to delete everything and start over with an empty DB (~1 minute):
|
|
|
|
- `bundle exec rake db:reset RAILS_ENV=development`
|
|
|
|
If you just want to delete everything and start over with dummy data (~40 minutes). This also does `db:reset` and runs DB-specific migrations:
|
|
|
|
- `bundle exec rake dev:setup RAILS_ENV=development`
|
|
|
|
If your test DB is giving you problems, it is safe to nuke it because it doesn't contain important data:
|
|
|
|
- `bundle exec rake db:reset RAILS_ENV=test`
|
|
|
|
## Migration wrangling
|
|
|
|
- `bundle exec rake db:migrate RAILS_ENV=development`: Execute any pending migrations that you may have picked up from a MR
|
|
- `bundle exec rake db:migrate:status RAILS_ENV=development`: Check if all migrations are `up` or `down`
|
|
- `bundle exec rake db:migrate:down VERSION=20170926203418 RAILS_ENV=development`: Tear down a migration
|
|
- `bundle exec rake db:migrate:up VERSION=20170926203418 RAILS_ENV=development`: Set up a migration
|
|
- `bundle exec rake db:migrate:redo VERSION=20170926203418 RAILS_ENV=development`: Re-run a specific migration
|
|
|
|
## Manually access the database
|
|
|
|
Access the database via one of these commands (they all get you to the same place)
|
|
|
|
```
|
|
gdk psql -d gitlabhq_development
|
|
bundle exec rails dbconsole RAILS_ENV=development
|
|
bundle exec rails db RAILS_ENV=development
|
|
```
|
|
|
|
- `\q`: Quit/exit
|
|
- `\dt`: List all tables
|
|
- `\d+ issues`: List columns for `issues` table
|
|
- `CREATE TABLE board_labels();`: Create a table called `board_labels`
|
|
- `SELECT * FROM schema_migrations WHERE version = '20170926203418';`: Check if a migration was run
|
|
- `DELETE FROM schema_migrations WHERE version = '20170926203418';`: Manually remove a migration
|
|
|
|
## FAQ
|
|
|
|
### `ActiveRecord::PendingMigrationError` with Spring
|
|
|
|
When running specs with the [Spring preloader](rake_tasks.md#speed-up-tests-rake-tasks-and-migrations),
|
|
the test database can get into a corrupted state. Trying to run the migration or
|
|
dropping/resetting the test database has no effect.
|
|
|
|
```sh
|
|
$ bundle exec spring rspec some_spec.rb
|
|
...
|
|
Failure/Error: ActiveRecord::Migration.maintain_test_schema!
|
|
|
|
ActiveRecord::PendingMigrationError:
|
|
|
|
|
|
Migrations are pending. To resolve this issue, run:
|
|
|
|
bin/rake db:migrate RAILS_ENV=test
|
|
# ~/.rvm/gems/ruby-2.3.3/gems/activerecord-4.2.10/lib/active_record/migration.rb:392:in `check_pending!'
|
|
...
|
|
0 examples, 0 failures, 1 error occurred outside of examples
|
|
```
|
|
|
|
To resolve, you can kill the spring server and app that lives between spec runs.
|
|
|
|
```sh
|
|
$ ps aux | grep spring
|
|
eric 87304 1.3 2.9 3080836 482596 ?? Ss 10:12AM 4:08.36 spring app | gitlab | started 6 hours ago | test mode
|
|
eric 37709 0.0 0.0 2518640 7524 s006 S Wed11AM 0:00.79 spring server | gitlab | started 29 hours ago
|
|
$ kill 87304
|
|
$ kill 37709
|
|
```
|
|
|
|
### db:migrate `database version is too old to be migrated` error
|
|
|
|
Users receive this error when `db:migrate` detects that the current schema version
|
|
is older than the `MIN_SCHEMA_VERSION` defined in the `Gitlab::Database` library
|
|
module.
|
|
|
|
Over time we cleanup/combine old migrations in the codebase, so it is not always
|
|
possible to migrate GitLab from every previous version.
|
|
|
|
In some cases you may want to bypass this check. For example, if you were on a version
|
|
of GitLab schema later than the `MIN_SCHEMA_VERSION`, and then rolled back the
|
|
to an older migration, from before. In this case, in order to migrate forward again,
|
|
you should set the `SKIP_SCHEMA_VERSION_CHECK` environment variable.
|
|
|
|
```sh
|
|
bundle exec rake db:migrate SKIP_SCHEMA_VERSION_CHECK=true
|
|
```
|