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# From 5.2 to 5.3
*Make sure you view this [upgrade guide from the `master` branch](https://gitlab.com/gitlab-org/gitlab-ce/tree/master/doc/update/5.2-to-5.3.md) for the most up to date instructions.*
## Warning
GitLab 5.3 is affected by critical security vulnerabilities CVE-2013-4490 and CVE-2013-4489.
## 0. Backup
It's useful to make a backup just in case things go south (with MySQL, this may require granting "LOCK TABLES" privileges to the GitLab user on the database version):
```bash
cd /home/git/gitlab
sudo -u git -H bundle exec rake gitlab:backup:create RAILS_ENV=production
```
## 1. Stop server
sudo service gitlab stop
## 2. Get latest code
```bash
cd /home/git/gitlab
sudo -u git -H git fetch
sudo -u git -H git checkout 5-3-stable
```
## 3. Install libs, migrations, etc.
```bash
cd /home/git/gitlab
# The Modernizr gem was yanked from RubyGems. It is required for GitLab >= 2.8.0
# Edit `Gemfile` and change `gem "modernizr", "2.5.3"` to
# `gem "modernizr-rails", "2.7.1"``
sudo -u git -H vim Gemfile
# MySQL
# Run a bundle install without deployment to generate the new Gemfile
sudo -u git -H bundle install --without development test postgres --no-deployment
# Install libs (with deployment this time)
sudo -u git -H bundle install --without development test postgres --deployment
# PostgreSQL
# Run a bundle install without deployment to generate the new Gemfile
sudo -u git -H bundle install --without development test mysql --no-deployment
# Install libs (with deployment this time)
sudo -u git -H bundle install --without development test mysql --deployment
# Both MySQL and PostgreSQL
sudo -u git -H bundle exec rake db:migrate RAILS_ENV=production
sudo -u git -H bundle exec rake assets:precompile RAILS_ENV=production
```
## 4. Update config files
- Make `/home/git/gitlab/config/gitlab.yml` same as https://gitlab.com/gitlab-org/gitlab-ce/blob/5-3-stable/config/gitlab.yml.example but with your settings.
- Make `/home/git/gitlab/config/puma.rb` same as https://gitlab.com/gitlab-org/gitlab-ce/blob/5-3-stable/config/puma.rb.example but with your settings.
## 5. Update Init script
```bash
sudo rm /etc/init.d/gitlab
sudo curl --location --output /etc/init.d/gitlab https://raw.github.com/gitlabhq/gitlabhq/5-3-stable/lib/support/init.d/gitlab
sudo chmod +x /etc/init.d/gitlab
```
## 6. Start application
sudo service gitlab start
sudo service nginx restart
## 7. Check application status
Check if GitLab and its environment are configured correctly:
sudo -u git -H bundle exec rake gitlab:env:info RAILS_ENV=production
To make sure you didn't miss anything run a more thorough check with:
sudo -u git -H bundle exec rake gitlab:check RAILS_ENV=production
If all items are green, then congratulations upgrade complete!
## Things went south? Revert to previous version (5.2)
### 1. Revert the code to the previous version
Follow the [upgrade guide from 5.1 to 5.2](5.1-to-5.2.md), except for the database migration (the backup is already migrated to the previous version).
### 2. Restore from the backup:
```bash
cd /home/git/gitlab
sudo -u git -H bundle exec rake gitlab:backup:restore RAILS_ENV=production
```
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