new: [host] kernel upgrade and ``btrfs-tools`` upgrade added.

precise/host/hooks/install.d/40-btrfs.sh

@@ -11,14 +11,57 @@ if [ -z "$BTRFS_DEVICE" ]; then
     exit 1
 fi
 
-apt-get install -y btrfs-tools
-
 if [ "$FORCE" != "yes" ]; then
     echo "the following is dangerous code. Please execute with FORCE=yes."
     echo "it DELETES directory /var/lib/docker if you have one."
     exit 1
 fi
 
+## Install latest kernel
+if [ "$UPDATE_KERNEL" ]; then
+    case "$UPDATE_KERNEL" in
+        ovh)
+            apt-get install -y lftp </dev/null
+            (
+                OVH_KERNELS_FTP=ftp://ftp.ovh.net/made-in-ovh/bzImage/${OVH_KERNEL_VERSION:-latest-experimental}
+                OVH_KERNEL_REGEX='.*-xxxx-grs-ipv6-64$'
+                lftp -e "lcd /boot/; mirror --only-newer -i '$OVH_KERNEL_REGEX'; bye" "$OVH_KERNELS_FTP" &&
+                cd /boot && update-grub
+            ) || exit 1
+            ;;
+        ubuntu)
+            ## check: http://askubuntu.com/a/257624/21888
+            #http://kernel.ubuntu.com/~kernel-ppa/mainline/
+            echo "ubuntu not supported yet" >&2
+            exit 1
+            ;;
+        *)
+            echo "Unknown \$UPDATE_KERNEL method '$UPDATE_KERNEL'." >&2
+            exit 1
+    esac
+fi
+
+if [ "$UPDATE_BTRFS_TOOLS" ]; then
+    ## Install latests ``btrfs-tools``:
+    (
+        apt-get remove -y btrfs-tools </dev/null || true
+        mkdir /root/dev/c -p &&
+            cd /root/dev/c &&
+            git clone git://git.kernel.org/pub/scm/linux/kernel/git/kdave/btrfs-progs.git &&
+            cd btrfs-progs &&
+            apt-get install -y asciidoc xmlto --no-install-recommends </dev/null &&
+            apt-get install -y build-essential autoconf pkg-config uuid-dev libattr1-dev \
+                    zlib1g-dev libacl1-dev e2fslibs-dev libblkid-dev liblzo2-dev </dev/null &&
+            ./autogen.sh &&
+            ./configure --prefix=/opt/apps/btrfs-tools &&
+            make &&
+            make install &&
+            ln -sf /opt/apps/btrfs-tools/bin/* /usr/local/bin/
+    ) || exit 1
+else
+    apt-get install -y btrfs-tools </dev/null
+fi
+
 ## "$BTRFS_DEVICE" device should not be mounted
 if mount | egrep ^"$BTRFS_DEVICE\s+" >/dev/null 2>&1; then
     umount "$BTRFS_DEVICE" || {