redmine upgrade

2.6.0 -> 3.0.0
ruby versionは2.2.0に対応しているようだが、gitlabと同じ2.1.5に合わせる。

$ wget http://www.redmine.org/releases/redmine-3.0.0.tar.gz
$ /usr/bin/mysqldump -u redmine -p redmine | gzip > redmine_`date +%y_%m_%d`.gz

$ tar zxf redmine-3.0.0.tar.gz
$ cp configuration.yml ../../redmine-3.0.0/config/
$ cp database.yml ../../redmine-3.0.0/config/
$ cp unicorn.rb ../../redmine-3.0.0/config/
$ cp config.ru ../../redmine-3.0.0/

$ bundle install --without development test --path vendor/bundle
$ bundle exec rake generate_secret_token
$ bundle exec rake db:migrate RAILS_ENV=production
$ bundle exec rake redmine:plugins:migrate RAILS_ENV=production
$ bundle exec rake tmp:cache:clear tmp:sessions:clear RAILS_ENV=production