简单的s3 server， 参考文档 https://s3-server.readthedocs.io/en/latest/DOCKER.html
docker run -d --name s3 -p 8000:8000 -v ./data:/usr/src/app/localData \
-v ./metadata:/usr/src/app/localMetadata -v ./conf/authdata.json:/usr/src/app/conf/authdata.json scality/s3server
# authdata.json可以从scality/s3server 镜像的/usr/src/app/conf/authdata.json拷贝出来
# 用s3cmd使用，vi ~/.s3cfg
[default]
access_key = accessKey1
secret_key =verySecretKey1
host_base = localhost:8000
host_bucket = %(bucket).localhost:8000
signature_v2 = False
use_https = False
