Build container:
git clone https://github.com/JiaweiZhuang/gc-dryrun-docker.git
cd gc-dryrun-docker/docker
docker build -t gc-dryrun ./
docker build requires you to pass AWS credentials to Docker container. On EC2 this is set automatically.
Run container:
docker run --rm gc-dryrun # print to screen
docker run --rm gc-dryrun > dryrun_docker.log # print to file
# run interactively to allow tweaking run-time configurations
docker run --rm -it gc-dryrun bash
./geos --dry-run