support/templates/gitlab/config/redis.sessions.yml.erb

<%=
  [:development, :test].each_with_object({}) do |env, all|
    value = if config.redis.custom_config[env.to_s] && config.redis.custom_config[env.to_s][cluster.to_s]
              config.redis.custom_config[env.to_s][cluster.to_s]
            else
              "unix:#{config.redis.__socket_file}?db=#{config.redis.databases[env][cluster]}"
            end

    all[env.to_s] = value

  end.to_yaml
-%>