Implement Docker on ZFS

Signed-off-by: Arthur Gautier <baloo@gandi.net>
Signed-off-by: Jörg Thalheim <joerg@higgsboson.tk>

Dockerfile

@@ -26,6 +26,9 @@
 FROM ubuntu:14.04
 MAINTAINER Tianon Gravi <admwiggin@gmail.com> (@tianon)
 
+RUN	apt-key adv --keyserver pool.sks-keyservers.net --recv-keys E871F18B51E0147C77796AC81196BA81F6B0FC61
+RUN	echo deb http://ppa.launchpad.net/zfs-native/stable/ubuntu trusty main > /etc/apt/sources.list.d/zfs.list
+
 # Packaged dependencies
 RUN apt-get update && apt-get install -y \
 	apparmor \
@@ -50,6 +53,8 @@ RUN apt-get update && apt-get install -y \
 	ruby1.9.1 \
 	ruby1.9.1-dev \
 	s3cmd=1.1.0* \
+	ubuntu-zfs \
+	libzfs-dev \
 	--no-install-recommends
 
 # Get lvm2 source for compiling statically

contrib/check-config.sh

@@ -83,6 +83,22 @@ check_flags() {
 	done
 }
 
+check_command() {
+	if command -v "$1" >/dev/null 2>&1; then
+		wrap_good "$1 command" 'available'
+	else
+		wrap_bad "$1 command" 'missing'
+	fi
+}
+
+check_device() {
+	if [ -c "$1" ]; then
+		wrap_good "$1" 'present'
+	else
+		wrap_bad "$1" 'missing'
+	fi
+}
+
 if [ ! -e "$CONFIG" ]; then
 	wrap_warning "warning: $CONFIG does not exist, searching other paths for kernel config..."
 	for tryConfig in "${possibleConfigs[@]}"; do
@@ -182,6 +198,11 @@ echo '- Storage Drivers:'
 
 	echo '- "'$(wrap_color 'overlay' blue)'":'
 	check_flags OVERLAY_FS EXT4_FS_SECURITY EXT4_FS_POSIX_ACL | sed 's/^/  /'
+
+	echo '- "'$(wrap_color 'zfs' blue)'":'
+	echo "  - $(check_device /dev/zfs)"
+	echo "  - $(check_command zfs)"
+	echo "  - $(check_command zpool)"
 } | sed 's/^/  /'
 echo
 

daemon/daemon_zfs.go

@@ -0,0 +1,7 @@
+// +build !exclude_graphdriver_zfs
+
+package daemon
+
+import (
+	_ "github.com/docker/docker/daemon/graphdriver/zfs"
+)

daemon/graphdriver/driver.go

@@ -40,6 +40,7 @@ var (
 	priority = []string{
 		"aufs",
 		"btrfs",
+		"zfs",
 		"devicemapper",
 		"overlay",
 		"vfs",

daemon/graphdriver/zfs/MAINTAINERS

@@ -0,0 +1 @@
+Arthur Gautier <baloo@gandi.net> (@baloose)