GitLab 7.xからGitLab 8.0にアップデートする方法 (GitLab CIあり編) ref: http://qiita.com/tnir/items/15e4ce4e091e93f5cee3

file0.txt

$ sudo yum update gitlab-ce

file1.txt

$ sudo gitlab-ctl stop ci-unicorn
$ sudo gitlab-ctl stop ci-sidekiq

file2.txt

$ sudo gitlab-ci-rake backup:show_secrets

file3.txt

$ sudo gitlab-ci-rake backup:create

file4.txt

$ sudo mv /var/opt/gitlab/ci-backups/*_gitlab_ci_backup.tar /var/opt/gitlab/backups/

file5.txt

$ sudo gitlab-rake ci:migrate

file6.txt

This will remove all CI related data and restore it from the provided backup.
Do you want to continue (yes/no)? yes

file7.txt

$ sudo gitlab-ctl hup unicorn
$ sudo gitlab-ctl restart sidekiq

file8.txt

Unpacking backup ... done
Restoring database ...
Restoring PostgreSQL database gitlabhq_production ...
SET
SET
DROP INDEX
DROP INDEX
SET
CREATE TABLE
CREATE SEQUENCE
ALTER SEQUENCE
ALTER TABLE
CREATE INDEX
done
Restoring builds ...
done
Migrating tags ...
Inserting tags...
Deleting old taggings...
Inserting taggings...
Resetting counters...
done
Migrating services ...
done
Deleting tmp directories ... done
done
done