pg >=15 alpine: Enable Zstandard builds "--with-zstd"

[ImreSamu]

pg >=15 alpine: "Add configure option --with-zstd to enable Zstandard builds"

• https://www.postgresql.org/docs/15/release-15.html

NOW: Test postgres:15beta1-alpine ( current )

docker run --name current_pgalpine15 -e POSTGRES_PASSWORD=pi31415926 -d postgres:15beta1-alpine -c wal_compression=zstd # .... Error in the logs 2022-06-30 06:48:41.233 GMT [31] FATAL: invalid value for parameter "wal_compression": "zstd" 2022-06-30 06:48:41.233 GMT [31] HINT: Available values: pglz, lz4, on, off. 

PROPOSAL: Test pgalpine15_zstd

$ cd ./15/alpine $ docker build -t pgalpine15_zstd . $ docker run --name pgalpine15_zstd -e POSTGRES_PASSWORD=pi31415926 -d pgalpine15_zstd -c wal_compression=zstd $ docker exec -ti pgalpine15_zstd psql -U postgres -c "SHOW wal_compression;" wal_compression ----------------- zstd (1 row)

Size difference:

$ docker images | grep -E "(15beta1-alpine|pgalpine15_zstd)" pgalpine15_zstd latest b5e422128289 46 minutes ago 218MB postgres 15beta1-alpine 0ee202fdba91 8 days ago 218MB 

./update.sh test

• only the 15/alpine/Dockerfile has changed

[tianon]

(Force pushed to pick up 13c3f7a 👀)