Add deploy ramdisk element for Ironic

Ironic requires callback from deploy ramdisk via API with json data.
Auth token also required if Keystone auth enabled for Ironic API.
This patch adds separate element 'deploy-ironic' for Ironic deploy
ramdisk creation.

Change-Id: I5ef96711763e50307cfa17c406a9e16bffb937bc

elements/deploy-ironic/README.md

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+A ramdisk that will expose the machine primary disk over iSCSI and reboot
+once Ironic signals it is finished.

elements/deploy-ironic/binary-deps.d/deploy-ironic

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+busybox
+curl
+tgtadm
+tgtd

elements/deploy-ironic/init.d/80-deploy-ironic

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+readonly IRONIC_API_URL=$(get_kernel_parameter ironic_api_url)
+
+if [ -z "$ISCSI_TARGET_IQN" ]; then
+  err_msg "iscsi_target_iqn is not defined"
+  troubleshoot
+fi
+
+t=0
+while ! target_disk=$(find_disk "$DISK"); do
+  if [ $t -eq 10 ]; then
+    break
+  fi
+  t=$(($t + 1))
+  sleep 1
+done
+
+if [ -z "$target_disk" ]; then
+  err_msg "Could not find disk to use."
+  troubleshoot
+fi
+
+echo "start iSCSI target on $target_disk"
+start_iscsi_target "$ISCSI_TARGET_IQN" "$target_disk" ALL
+if [ $? -ne 0 ]; then
+  err_msg "Failed to start iscsi target."
+  troubleshoot
+fi
+
+TOKEN_FILE=token-$DEPLOYMENT_ID
+
+if tftp -r /tftpboot/$TOKEN_FILE -g $BOOT_SERVER
+then TOKEN_HEADER="-H 'X-Auth-Token: `cat $TOKEN_FILE`'"
+else TOKEN_HEADER=""
+fi
+
+DATA="'{\"address\":\"$BOOT_IP_ADDRESS\",\"key\":\"$DEPLOYMENT_KEY\",\"iqn\":\"$ISCSI_TARGET_IQN\",\"error\":\"$FIRST_ERR_MSG\"}'"
+
+echo "request Ironic API to deploy image"
+curl \
+ -X POST \
+ -H 'Content-Type: application/json' \
+ $TOKEN_HEADER \
+ -d $DATA \
+ $IRONIC_API_URL/nodes/$DEPLOYMENT_ID/vendor_passthru/pass_deploy_info
+
+echo "waiting for notice of complete"
+nc -l -p 10000
+
+echo "stop iSCSI target on $target_disk"
+
+stop_iscsi_target

elements/deploy-ironic/install.d/51-install-tgt

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+#!/bin/bash
+install-packages tgt

elements/deploy-ironic/install.d/52-install-busybox

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+#!/bin/bash
+install-packages busybox

elements/deploy-ironic/install.d/53-install-curl

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+#!/bin/bash
+install-packages curl