From e61376c2d2a97af7a2e905d6e2951b0f50ff4d0b Mon Sep 17 00:00:00 2001
From: Yolanda Robla Mota <yroblamo@redhat.com>
Date: Mon, 16 Jan 2017 16:36:21 +0100
Subject: [PATCH] Add element to customize dracut on the agent

Updates the ironic agent, installing multipath package
and regenerating dracut to add all the specified drivers.

Change-Id: Ieda51d71c4760c66c00c48d27b6b6b66e3f479eb
(cherry picked from commit 15b5776c57322eb736006907e22aa0ae6eeb8ea3)
---
 elements/ironic-agent-multipath/README.rst          | 10 ++++++++++
 elements/ironic-agent-multipath/element-deps        |  2 ++
 .../finalise.d/98-regenerate-initramfs              | 13 +++++++++++++
 .../ironic-agent-multipath/package-installs.yaml    |  2 ++
 environment.d/10-ironic-agent-multipath.bash        |  3 +++
 5 files changed, 30 insertions(+)
 create mode 100644 elements/ironic-agent-multipath/README.rst
 create mode 100644 elements/ironic-agent-multipath/element-deps
 create mode 100755 elements/ironic-agent-multipath/finalise.d/98-regenerate-initramfs
 create mode 100644 elements/ironic-agent-multipath/package-installs.yaml
 create mode 100755 environment.d/10-ironic-agent-multipath.bash

diff --git a/elements/ironic-agent-multipath/README.rst b/elements/ironic-agent-multipath/README.rst
new file mode 100644
index 000000000..8c658777e
--- /dev/null
+++ b/elements/ironic-agent-multipath/README.rst
@@ -0,0 +1,10 @@
+======================
+ironic-agent-multipath
+======================
+Updates the ironic agent, installing multipath package,
+and rebuilding dracut to add the specified drivers.
+
+The drivers to add can be specified with the
+`IRONIC_AGENT_MULTIPATH_DRIVERS`. It accepts a list of
+drivers to add separated by spaces. The default values are
+'be2iscsi iscsi_target_mod dm_multipath'.
diff --git a/elements/ironic-agent-multipath/element-deps b/elements/ironic-agent-multipath/element-deps
new file mode 100644
index 000000000..8c3ffe52a
--- /dev/null
+++ b/elements/ironic-agent-multipath/element-deps
@@ -0,0 +1,2 @@
+package-installs
+select-boot-kernel-initrd
diff --git a/elements/ironic-agent-multipath/finalise.d/98-regenerate-initramfs b/elements/ironic-agent-multipath/finalise.d/98-regenerate-initramfs
new file mode 100755
index 000000000..597d2dcd3
--- /dev/null
+++ b/elements/ironic-agent-multipath/finalise.d/98-regenerate-initramfs
@@ -0,0 +1,13 @@
+#!/bin/bash
+
+if [ ${DIB_DEBUG_TRACE:-0} -gt 0 ]; then
+    set -x
+fi
+set -eu
+set -o pipefail
+
+RET=$(select-boot-kernel-initrd)
+KERNEL_VERSION=`echo ${RET%:*} | sed 's/vmlinuz-//g'`
+RAMDISK=/boot/${RET#*:}
+
+dracut -v --force --add-drivers "$IRONIC_AGENT_MULTIPATH_DRIVERS" $RAMDISK $KERNEL_VERSION
diff --git a/elements/ironic-agent-multipath/package-installs.yaml b/elements/ironic-agent-multipath/package-installs.yaml
new file mode 100644
index 000000000..9383be918
--- /dev/null
+++ b/elements/ironic-agent-multipath/package-installs.yaml
@@ -0,0 +1,2 @@
+iscsi-initiator-utils:
+device-mapper-multipath:
diff --git a/environment.d/10-ironic-agent-multipath.bash b/environment.d/10-ironic-agent-multipath.bash
new file mode 100755
index 000000000..c99daed65
--- /dev/null
+++ b/environment.d/10-ironic-agent-multipath.bash
@@ -0,0 +1,3 @@
+if [ -z "${IRONIC_AGENT_MULTIPATH_DRIVERS:-}" ]; then
+    export IRONIC_AGENT_MULTIPATH_DRIVERS=${IRONIC_AGENT_MULTIPATH_DRIVERS:-"be2iscsi iscsi_target_mod dm_multipath"}
+fi