docker volume

• Volumes are stored in the host OS at /var/lib/docker/volumes

docker volume create "volume-name"

Storage drivers

• Attributions
• Maintain layered architecture
• Create container layer (writable)
• Copy files across layers
• Common storage drivers
• AUFS
• ZFS
• BTRFS
• Device Mapper
• Overlay
• Overlay2
• Docker will choose the best storage driver available based on the host OS

Volume drivers

• Volumes are managed by volume driver plugins
• Volume drivers
• Local: creates a volume on the host machine (/var/lib/docker/volumes)
• Azure File Storage
• Convoy
• DigitalOcean Block Storage
• Flocker
• gce-dock
• GlusterFs
• NetApp
• RexRay
• PortWorx
• VMware vSphere Storage

docker container run \
  --volume-driver "rexray/ebs"
  --mount "type=bind,source=/data/mysql,target=/varlib/mysql"
  "mysql"

Mount volumes

# Volume mount - Unnamed volume (placeholder for the folder, so that the bind mount do not overwrite this file)
docker container run \
    -v "/var/lib/mysql" \
    "mysql"

# Volume mount - Named volume
docker container run \
    -v "mysql-db:/var/lib/mysql" \
    "mysql"

# Bind Mount (replaces all the files inside of the container folder). Can't be used in Dockerfile
docker container run \
    -v "$(pwd):/usr/share/nginx/html" \
    "nginx" # $HOME

# New mount syntax
docker container run \
    --mount "type=bind,source=/data/mysql,target=/varlib/mysql"
    "mysql"