From 91e3b72a23a4bde3c811cedf2224f682aa4d99b7 Mon Sep 17 00:00:00 2001
From: Michael Turek <mjturek@linux.vnet.ibm.com>
Date: Thu, 12 Oct 2017 10:38:23 -0400
Subject: [PATCH] Add iscsi-boot element

This patch adds an element that handles the configuration for
creating a disk capable of being a remote root filesystem through
iSCSI on Ubuntu and Debian images.

Change-Id: Ibf9e39d2bdab530106015f156d23d28029d12b0d
Closes-bug: #1716794
---
 diskimage_builder/elements/iscsi-boot/README.rst    | 13 +++++++++++++
 diskimage_builder/elements/iscsi-boot/element-deps  |  1 +
 .../elements/iscsi-boot/package-installs.yaml       |  2 ++
 .../iscsi-boot/post-install.d/open-iscsi-config     | 13 +++++++++++++
 4 files changed, 29 insertions(+)
 create mode 100644 diskimage_builder/elements/iscsi-boot/README.rst
 create mode 100644 diskimage_builder/elements/iscsi-boot/element-deps
 create mode 100644 diskimage_builder/elements/iscsi-boot/package-installs.yaml
 create mode 100755 diskimage_builder/elements/iscsi-boot/post-install.d/open-iscsi-config

diff --git a/diskimage_builder/elements/iscsi-boot/README.rst b/diskimage_builder/elements/iscsi-boot/README.rst
new file mode 100644
index 000000000..70a674e1b
--- /dev/null
+++ b/diskimage_builder/elements/iscsi-boot/README.rst
@@ -0,0 +1,13 @@
+==========
+iscsi-boot
+==========
+Handles configuration for the disk to be capable of serving as
+a remote root filesystem through iSCSI. Currently, this element
+only configures Ubuntu/Debian images.
+
+It performs the following actions:
+
+* Installs the ``open-iscsi`` package.
+* Creates the ``etc/iscsi/iscsi.initramfs`` configuration file and sets
+  ``ISCSI_AUTO=true`` within it.
+* Updates the initramfs to apply the changes.
diff --git a/diskimage_builder/elements/iscsi-boot/element-deps b/diskimage_builder/elements/iscsi-boot/element-deps
new file mode 100644
index 000000000..7076aba94
--- /dev/null
+++ b/diskimage_builder/elements/iscsi-boot/element-deps
@@ -0,0 +1 @@
+package-installs
diff --git a/diskimage_builder/elements/iscsi-boot/package-installs.yaml b/diskimage_builder/elements/iscsi-boot/package-installs.yaml
new file mode 100644
index 000000000..9eeeeec5a
--- /dev/null
+++ b/diskimage_builder/elements/iscsi-boot/package-installs.yaml
@@ -0,0 +1,2 @@
+open-iscsi:
+  phase: install.d
diff --git a/diskimage_builder/elements/iscsi-boot/post-install.d/open-iscsi-config b/diskimage_builder/elements/iscsi-boot/post-install.d/open-iscsi-config
new file mode 100755
index 000000000..4ad292c3f
--- /dev/null
+++ b/diskimage_builder/elements/iscsi-boot/post-install.d/open-iscsi-config
@@ -0,0 +1,13 @@
+#!/bin/bash
+
+if [ ${DIB_DEBUG_TRACE:-0} -gt 0 ]; then
+    set -x
+fi
+
+set -eu
+set -o pipefail
+
+if [[ $DISTRO_NAME = "ubuntu" || $DISTRO_NAME = "debian" ]]; then
+    echo "ISCSI_AUTO=true" > /etc/iscsi/iscsi.initramfs
+    update-initramfs -u
+fi