Merge "Ironic: Deploy ramdisk to find the right root device"

elements/deploy-ironic/init.d/70-ironic-root-device

@@ -0,0 +1,115 @@
+CHECK_SIZE=false
+CHECK_MODEL=false
+CHECK_VENDOR=false
+CHECK_UUID=false
+CHECK_WWN=false
+CHECK_HCTL=false
+CHECK_SERIAL=false
+
+
+# URL/Percent decode a text
+function urldecode() {
+    local encoded="${1//+/ }"
+    printf '%b' "${encoded//%/\x}"
+}
+
+
+# Lowercase and url decode the values
+function normalize() {
+    echo `urldecode "${1,,}"`
+}
+
+
+function _exec_lsblk() {
+    lsblk -Pbio $2 /dev/$1 | head -n 1 | grep -Po "(?<=^$2=).*" | tr "\"" " "
+}
+
+
+# Get the block device size in GiB
+function get_size() {
+    echo $(( (512 * $(cat /sys/block/$1/size) ) / 2**30))
+}
+
+
+function get_model() {
+    local file
+    file=/sys/block/$1/device/model
+    if [ -f $file ]; then
+        normalize "$(cat $file)"
+    fi
+}
+
+
+function get_vendor() {
+    local file
+    file=/sys/block/$1/device/vendor
+    if [ -f $file ]; then
+        normalize "$(cat $file)"
+    fi
+}
+
+
+function get_wwn() {
+    normalize "$(_exec_lsblk "$1" WWN)"
+}
+
+
+function get_serial() {
+    normalize "$(_exec_lsblk "$1" SERIAL)"
+}
+
+
+# Parse all the hints from the Kernel cmdline and set the CHECK_*
+# variables
+function parse_hints() {
+    IFS=',' read -ra H <<< "$ROOT_DEVICE"
+    for i in "${H[@]}"; do
+        case "$i" in
+                size=*)
+                    CHECK_SIZE="${i#size=}"
+                ;;
+                model=*)
+                    CHECK_MODEL=`normalize "${i#model=}"`
+                ;;
+                vendor=*)
+                    CHECK_VENDOR=`normalize "${i#vendor=}"`
+                ;;
+                wwn=*)
+                    CHECK_WWN=`normalize "${i#wwn=}"`
+                ;;
+                serial=*)
+                    CHECK_SERIAL=`normalize "${i#serial=}"`
+                ;;
+                *)
+                ;;
+        esac
+    done
+}
+
+
+function get_root_device() {
+    # Parse the hints
+    parse_hints
+
+    for DEV in /sys/block/* ; do
+        DEV_NAME=${DEV##*/}
+        DEV_PATH=/dev/$DEV_NAME
+
+        # Ignore loop and ram devices
+        [[ $DEV_NAME = *loop* || $DEV_NAME = *ram* ]] && continue || :
+
+        # Find out if it's a CDROM
+        TYPE=/sys/block/$DEV_NAME/device/type
+        [[ -f $TYPE ]] && (( $(cat "$TYPE") == 5 )) && continue || :
+
+        [[ $CHECK_SIZE != false && $(get_size "$DEV_NAME") != $CHECK_SIZE ]] && continue || :
+        [[ $CHECK_MODEL != false && $(get_model "$DEV_NAME") != $CHECK_MODEL ]] && continue || :
+        [[ $CHECK_VENDOR != false && $(get_vendor "$DEV_NAME") != $CHECK_VENDOR ]] && continue || :
+        [[ $CHECK_SERIAL != false && $(get_serial "$DEV_NAME") != $CHECK_SERIAL ]] && continue || :
+        [[ $CHECK_WWN != false && $(get_wwn "$DEV_NAME") != $CHECK_WWN ]] && continue || :
+
+        # A device that matches all hints was found
+        echo "$DEV_PATH"
+        break
+    done
+}

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

@@ -1,20 +1,26 @@
 readonly IRONIC_API_URL=$(get_kernel_parameter ironic_api_url)
 readonly IRONIC_BOOT_OPTION=$(get_kernel_parameter boot_option)
 readonly IRONIC_BOOT_MODE=$(get_kernel_parameter boot_mode)
+readonly ROOT_DEVICE=$(get_kernel_parameter root_device)
 
 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
+target_disk=
+if [[ $ROOT_DEVICE ]]; then
+    target_disk="$(get_root_device)"
+else
+    t=0
+    while ! target_disk=$(find_disk "$DISK"); do
+      if [ $t -eq 10 ]; then
+        break
+      fi
+      t=$(($t + 1))
+      sleep 1
+    done
+fi
 
 if [ -z "$target_disk" ]; then
   err_msg "Could not find disk to use."