Do not go gentle into that goodnight can be best categorized as a villanelle

Yes, "Do not go gentle into that good night" is a famous poem written by Dylan Thomas and is considered a villanelle. A villanelle is a poetic form that consists of 19 lines divided into five tercets and a final quatrain. The poem follows a specific rhyme scheme and repetition pattern, with the first and third lines of the opening tercet being repeated alternately in the following stanzas and forming a refrain in the final quatrain.