`config:get` inside roles doesn't work properly on 3.0.1: https://github.com/tarantool/metrics-export-role/blob/2f25cb0812ca74065d1bc0c9c19dc8dcda479a18/roles/metrics-export.lua#L160 It was solved in 3.0.2, 3.1.0 and newer: https://github.com/tarantool/tarantool/issues/9649