From 572cef52e2a26bd842c32563dc69755400ad4589 Mon Sep 17 00:00:00 2001
From: vponomaryov <vponomaryov@mirantis.com>
Date: Thu, 21 Jan 2016 15:54:24 +0200
Subject: [PATCH] Add ZFS element

ZFS filesystem is going to be used for replication feature by
Manila Generic share driver.
So, add appropriate Manila image element as optional and enabled by default.

Set env var 'MANILA_ENABLE_ZFS_SUPPORT' to any value other than 'yes' to
disable its installation.

Change-Id: If58186dc03d43430c1225e77aa80a1f85a62dd1b
Closes-Bug: #1538658
---
 bin/manila-image-create                       |  6 ++
 .../manila-zfs/post-install.d/50-manila-zfs   | 57 +++++++++++++++++++
 2 files changed, 63 insertions(+)
 create mode 100755 elements/manila-zfs/post-install.d/50-manila-zfs

diff --git a/bin/manila-image-create b/bin/manila-image-create
index 382e2e4..cdaea48 100644
--- a/bin/manila-image-create
+++ b/bin/manila-image-create
@@ -36,6 +36,8 @@ MANILA_IMG_NAME=${MANILA_IMG_NAME:-"manila-service-image.qcow2"}
 MANILA_ENABLE_NFS_SUPPORT=${MANILA_ENABLE_NFS_SUPPORT:-"yes"}
 MANILA_ENABLE_CIFS_SUPPORT=${MANILA_ENABLE_CIFS_SUPPORT:-"yes"}
 
+# Manila Generic share driver replication feature requires ZFS:
+MANILA_ENABLE_ZFS_SUPPORT=${MANILA_ENABLE_ZFS_SUPPORT:-"yes"}
 
 # Verify configuration
 # --------------------
@@ -55,6 +57,10 @@ if [ "$MANILA_ENABLE_CIFS_SUPPORT" = "yes" ]; then
     OPTIONAL_ELEMENTS="$OPTIONAL_ELEMENTS manila-cifs"
 fi
 
+if [ "$MANILA_ENABLE_ZFS_SUPPORT" = "yes" ]; then
+    OPTIONAL_ELEMENTS="$OPTIONAL_ELEMENTS manila-zfs"
+fi
+
 if [ "$USE_OFFLINE_MODE" = "yes" ]; then
     OPTIONAL_DIB_ARGS="$OPTIONAL_DIB_ARGS -offline"
 fi
diff --git a/elements/manila-zfs/post-install.d/50-manila-zfs b/elements/manila-zfs/post-install.d/50-manila-zfs
new file mode 100755
index 0000000..54a1348
--- /dev/null
+++ b/elements/manila-zfs/post-install.d/50-manila-zfs
@@ -0,0 +1,57 @@
+#!/bin/bash
+
+if [ ${DIB_DEBUG_TRACE:-0} -gt 0 ]; then
+    set -x
+fi
+set -eu
+set -o pipefail
+
+# NOTE(vponomaryov): this approach of ZFS installation is valid for
+# Ubuntu 14.04 (Trusty) and is very likely to be different for other releases.
+# Also, ZFS should be installed in 'post-install.d' section because its
+# dependency 'dkms' is installed in 'install.d/99-dkms'.
+
+# Presense of 'ARCH' env var blocks DKMS from building new dynamic kernel
+# modules. So, unset it temporary.
+ARCH_BACKUP=$ARCH
+unset ARCH
+
+# Install 'software-properties-common' to get 'apt-add-repository' installed
+apt-get install -y software-properties-common
+
+# Register ZFS private package archive
+apt-add-repository --yes ppa:zfs-native/stable
+
+# Update list of available packages and then upgrade
+apt-get -y -q update && apt-get -y -q upgrade
+
+# 'linux-headers-*' should be installed prior to any dynamic kernel modules,
+# which are 'zfs' and its dependency 'spl'.
+# Same about 'build-essential', that is required for package compilations.
+apt-get install -y linux-headers-generic
+apt-get install -y build-essential
+
+# Install ZFS for Ubuntu
+apt-get install -y ubuntu-zfs
+
+echo """
+# Expected following template:
+# %module-name%, %module-version%, %kernel-version%, %arch%: installed
+#
+# examples:
+# spl, 0.6.5.4, 3.13.0-76-generic, x86_64: installed
+# zfs, 0.6.5.4, 3.13.0-76-generic, x86_64: installed
+#
+# If it looks like following:
+# spl, x.y.z, added
+# zfs, x.y.z, added
+#
+# then something went wrong.
+#
+# List of dymanic kernel modules:
+"""
+dkms status
+
+# Return back env var changes
+export ARCH=$ARCH_BACKUP
+unset ARCH_BACKUP