gitlab

Create bucket
s3cmd mb s3://artifacts

Configure GitLab
/etc/gitlab/gitlab.rb
...
nginx['client_max_body_size'] = '1024m'
gitlab_rails['artifacts_enabled'] = true
gitlab_rails['artifacts_object_store_enabled'] = true
gitlab_rails['artifacts_object_store_remote_directory'] = "artifacts"
gitlab_rails['artifacts_object_store_connection'] = {
'provider' => 'AWS',
'region' => 'us-west-1',
'aws_access_key_id' => 'KEY1234',
'aws_secret_access_key' => 'PASS1234
'endpoint' => 'https://s3.example.com'
}

gitlab-ctl reconfigure