How to restore old CI build outputs that are lost during upgrade to 8.1
I upgraded to GitLab 8.0 a month ago and to 8.1 last week. The upgrade to 8.0 went OK, the CI builds have been migrated from the PostgreSQL database to the file system. However, when I upgraded from 8.0 to 8.1, the previously migrated build output files have disappeared, and I only see the build output files that have been uploaded since the 8.0 upgrade.
I still have got the backup files from the database that were created during the 8.0 upgrade, e.g.:
/var/opt/gitlab/gitlab-ci/tmp/backups/1445530398_gitlab_ci_backup.tar
It contains a database.sql.gz file, backup_information.yml and an empty 'builds' directory.
Is is possible to extract the old build outputs from this backup somehow?