A minimal pgpool docker image based on alpine linux with memcached support.
docker run -d -p 9999:9999 -p 9898:9898 hegand/pgpool
docker run -d -p 9999:9999 -p 9898:9898 -v /local/dir/pgpool.conf:/etc/pgpool.conf:ro -v /local/dir/pool_passwd:/etc/pool_passwd:rw -v /local/dir/pool_hba.conf:/etc/pool_hba.conf:ro hegand/pgpool
More info about pgpool setup: offical pgpool site