Add an element to configure iBFT network interfaces

This allows nodes with remote devices configured via iBFT to be
correctly used during Ironic introspection and deployment,
at least for non-multipath configurations.

The new element is added as a dependency for ironic-agent.

Change-Id: If3dac6504d26535593f12e851092065b688ef696

diskimage_builder/elements/ibft-interfaces/README.rst

@@ -0,0 +1,5 @@
+===============
+ibft-interfaces
+===============
+
+Initialize network interfaces with information provided through iBFT.

diskimage_builder/elements/ibft-interfaces/element-deps

@@ -0,0 +1,4 @@
+dib-init-system
+install-static
+package-installs
+pkg-map

diskimage_builder/elements/ibft-interfaces/init-scripts/systemd/init-ibft-interfaces.service

@@ -0,0 +1,14 @@
+[Unit]
+Description=Initialize iBFT network interfaces
+After=network.target
+Before=network-online.target
+Wants=network-online.target
+
+[Service]
+Type=oneshot
+User=root
+ExecStart=/usr/local/sbin/init-ibft-interfaces.sh
+RemainAfterExit=true
+
+[Install]
+WantedBy=multi-user.target

diskimage_builder/elements/ibft-interfaces/init-scripts/sysv/init-ibft-interfaces.init

@@ -0,0 +1,31 @@
+#!/bin/sh -e
+### BEGIN INIT INFO
+# Provides:          init-ibft-interfaces
+# Required-Start:    $local_fs networking
+# Required-Stop:     $local_fs
+# Default-Start:     S
+# Default-Stop:      0 6
+# X-Start-Before:
+# Short-Description: Initialize iBFT interfaces
+# Description:       Initialize iBFT network interfaces
+### END INIT INFO
+
+NAME=init-ibft-interfaces
+INIT_NAME=/etc/init.d/${NAME}
+SCRIPT_NAME=/usr/local/sbin/${NAME}.sh
+
+[ -x $SCRIPT_NAME ] || exit 0
+
+case "$1" in
+    start)
+        $SCRIPT_NAME
+        ;;
+    stop)
+        ;;
+    *)
+        echo "Usage: $INIT_NAME {start|stop}"
+        exit 1
+        ;;
+esac
+
+exit 0

diskimage_builder/elements/ibft-interfaces/init-scripts/upstart/init-ibft-interfaces.conf

@@ -0,0 +1,16 @@
+# init-ibft-interfaces - Initialize iBFT network interfaces
+
+description     "Initialize iBFT network interfaces"
+
+start on runlevel [2345]
+stop on runlevel [!2345]
+
+respawn
+respawn limit 10 5
+umask 022
+
+expect stop
+
+console output
+
+exec /usr/local/sbin/init-ibft-interfaces.sh

diskimage_builder/elements/ibft-interfaces/package-installs.yaml

@@ -0,0 +1 @@
+iscsi_package:

diskimage_builder/elements/ibft-interfaces/pkg-map

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+{
+  "family": {
+    "redhat": {
+      "iscsi_package": "iscsi-initiator-utils"
+    },
+    "gentoo": {
+      "iscsi_package": "sys-block/open-iscsi"
+    }
+  },
+  "default": {
+    "iscsi_package": "open-iscsi"
+  }
+}

diskimage_builder/elements/ibft-interfaces/post-install.d/70-init-ibft-interfaces

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+#!/bin/bash
+
+if [ "${DIB_DEBUG_TRACE:-0}" -gt 0 ]; then
+    set -x
+fi
+set -eu
+set -o pipefail
+
+case "$DIB_INIT_SYSTEM" in
+    upstart)
+        ;;
+    systemd)
+        systemctl enable init-ibft-interfaces.service
+        ;;
+    sysv)
+        update-rc.d init-ibft-interfaces.init defaults
+        ;;
+    *)
+        echo "Unsupported init system $DIB_INIT_SYSTEM"
+        exit 1
+        ;;
+esac

diskimage_builder/elements/ibft-interfaces/static/etc/modules-load.d/ibft.conf

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+iscsi_boot_sysfs
+iscsi_ibft
+iscsi_tcp

diskimage_builder/elements/ibft-interfaces/static/usr/local/sbin/init-ibft-interfaces.sh

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+#!/bin/bash
+# dib-lint: disable=dibdebugtrace
+
+set -eux
+set -o pipefail
+
+# iscsistart is a part of the dependencies, but check just in case.
+if ! iscsistart -v; then
+    echo "iscsistart not found, iBFT devices won't be connected"
+    exit 1
+fi
+
+if iscsistart -f; then
+    if ! iscsistart -N; then
+        echo "Could not configure iBFT devices"
+        exit 1
+    fi
+    # Make sure the events for new devices are processed
+    udevadm settle
+else
+    echo "No iBFT devices to configure, exiting"
+fi

diskimage_builder/elements/ironic-agent/element-deps

@@ -1,4 +1,5 @@
 dhcp-all-interfaces
+ibft-interfaces
 install-static
 no-final-image
 package-installs

releasenotes/notes/init-ibft-interfaces-9458d97dfcecc3ae.yaml

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+---
+features:
+  - |
+    Adds a new element ``init-ibft-interfaces`` to initialize network
+    interfaces with configuration provided via iBFT. The new element is now
+    a dependency of the ``ironic-agent`` element.