Storage-y things Brian Goff Core Engineer @cpuguy83

Agenda Container & Image Storage Persistent Storage

Image & Container Storage

What storage driver should I choose?

Container & Image Storage What driver should I choose? AUFS BTRFS DeviceMapper Overlay Overlay2 (new in 1.12!!!) ZFS

Persistent Storage

“Docker is for stateless applications!” — Uninformed

How do I do X with Docker?

Docker does not change computing fundamentals Docker moves point of interaction higher up Docker lets you focus more on your application and less on infrastructure

Storage is hard!

Share state by communicating Go idiom

We never lot anyone’s data – but we had some data take some very, very long vacations — Bryan Cantrill Go idiom

Create a volume $ docker volume create --name important_data $ docker run –d –v important_data:/var/lib/postgresql/data –-name pgdb postgres $ docker rm –f pgdb $ # Oh no! I removed my database!... But I didn’t lose my data

Create a volume - NFS $ docker volume create --name important_data --opt type=nfs --opt device=1.2.3.4:/export/path important_data $ docker run –d –v important_data:/var/lib/postgresql/data –-name pgdb postgres $ docker rm –f pgdb $ # Oh no! I removed my database!... But I didn’t lose my data

Create a volume - BTRFS $ docker volume create --name important_data --opt type=btrfs --opt device=/dev/sdb important_data $ docker run –d –v important_data:/var/lib/postgresql/data –-name pgdb postgres $ docker rm –f pgdb $ # Oh no! I removed my database!... But I didn’t lose my data

Create a volume - Gluster $ docker volume create --name important_data --driver glusterfs important_data $ docker run –d –v important_data:/var/lib/postgresql/data –-name pgdb postgres $ docker rm –f pgdb $ # Oh no! I removed my database!... But I didn’t lose my data

Storage-y things Brian Goff Core Engineer @cpuguy83