I just installed Docker 1.13.0 from yum.dockerproject.org onto some CentOS 7.3 hosts.
I was surprised to see that the default Storage Driver has changed from devicemapper to overlay:
docker01 # docker info | less Server Version: 1.13.0 Storage Driver: overlay Backing Filesystem: xfs Supports d_type: true
Docker 1.12 had this:
Server Version: 1.12.2 Storage Driver: devicemapper Pool Name: docker-253:0-3412340747-pool Pool Blocksize: 65.54 kB Base Device Size: 10.74 GB Backing Filesystem: xfs Data file: /dev/loop0 Metadata file: /dev/loop1
Has the default storage driver for Docker 1.13.0 on EL7 changed? I’m not seeing that mentioned in the Release Notes or in the documentation. Using the Overlay driver is a welcome change as long as it’s stable now. But it’s not a small change so I was expecting some more information.