TT#11444 Add RAID configuration menu

Add menu if Software RAID should be configured and which disks
should be part of it. Only 2 disks allowed.

Move all disk selection code to separate script.

Script will write variables to /tmp/disk_selection file to pass
it to main.sh. It is necessary because 'dialog' is used for
interactivity so we can not capture output of script.

Change-Id: I3dd772c9a6ac6db6809688ff38f242271d9551a8

templates/scripts/includes/disk_selection.sh

@@ -0,0 +1,103 @@
+#!/bin/bash
+
+set -e
+set -u
+
+prompt_for_raid() {
+  # display disk ID next to the disk name
+  declare -a DISK_LIST
+  DISK_LIST=( $(for i in "${AVAILABLE_DISKS[@]}" ; do
+                disk_info=$(get_disk_info "${i}")
+                echo "${i}" "${disk_info}" off
+              done) )
+  local TMP
+  TMP=$(mktemp)
+  if ! dialog --title "Disk selection for Software RAID" --separate-output \
+    --checklist "Please select the disks you would like to use for your RAID1:" 0 0 0 \
+    "${DISK_LIST[@]}" 2>"${TMP}" ; then
+    rm -f "${TMP}"
+    echo "Cancelling as requested by user during disk selection." >&2
+    exit 1
+  fi
+  TARGET_DISK=( $(cat "${TMP}") ); rm -f "${TMP}"
+  if [[ "${#TARGET_DISK[@]}" -ne 2 ]]; then
+    dialog --title "Disk selection for Software RAID" \
+      --msgbox "Exactly 2 disks need to be selected, cannot continue." 0 0
+    rerun=true
+  fi
+}
+
+prompt_for_target() {
+  # display disk ID next to the disk name
+  declare -a DISK_LIST
+  DISK_LIST=( $(for i in "${AVAILABLE_DISKS[@]}" ; do
+                disk_info=$(get_disk_info "${i}")
+                echo "${i}" "${disk_info}"
+              done) )
+
+  local TMP
+  TMP=$(mktemp)
+  if ! dialog --title "Disk selection" --single-quoted \
+    --ok-label OK --cancel-label Exit \
+    --menu "Please select the target disk for installing Debian/ngcp:" 0 0 0 \
+    "${DISK_LIST[@]}" 2>"${TMP}" ; then
+    rm -f "${TMP}"
+    echo "Cancelling as requested by user during disk selection." >&2
+    exit 1
+  fi
+  TARGET_DISK=( $(cat "${TMP}") ); rm -f "${TMP}"
+}
+
+get_disk_info() {
+  local disk="${1}"
+
+  local disk_info
+  for file in /dev/disk/by-id/* ; do
+    case "$(realpath "${file}")" in
+      "/dev/${disk}")
+        disk_info="${file#/dev/disk/by-id/}"
+        break
+      ;;
+      *)
+        disk_info="${file}"
+      ;;
+    esac
+  done
+  echo "${disk_info}"
+
+  return 0
+}
+
+rm -f /tmp/disk_options
+
+declare -a AVAILABLE_DISKS
+AVAILABLE_DISKS=( $(awk '/[a-z]$/ {print $4}' /proc/partitions | grep -v '^name$' | sort -u) )
+if [[ -z "${AVAILABLE_DISKS[*]}" ]] ; then
+  dialog --title "Disk selection" \
+    --msgbox "Sorry, no disks found. Please make sure to have a hard disk attached to your system/VM." 0 0
+  exit 1
+fi
+
+SW_RAID='false'
+message="Do you want to configure Software RAID?
+Please notice that only RAID level 1 is currently supported. Configuration will take place using mdadm."
+
+if dialog --stdout --title "Software RAID" --defaultno --yesno "${message}" 0 0 ; then
+  SW_RAID='true'
+fi
+
+declare -a TARGET_DISK
+
+if "${SW_RAID}" ; then
+  rerun=true
+  while "${rerun}"; do
+    rerun=false
+    prompt_for_raid
+  done
+  echo "SWRAID_DISK1=${TARGET_DISK[0]} SWRAID_DISK2=${TARGET_DISK[1]}" > /tmp/disk_options
+else
+  prompt_for_target
+  echo "TARGET_DISK=${TARGET_DISK[0]}" > /tmp/disk_options
+fi
+
+exit 0

templates/scripts/main.sh

@@ -82,41 +82,6 @@ check_for_existing_pvs()
   fi
 }
 
-prompt_for_target()
-{
-  AVAILABLE_DISKS=$(awk '/[a-z]$/ {print $4}' /proc/partitions | grep -v '^name$' | sort -u)
-
-  if [ -z "$AVAILABLE_DISKS" ] ; then
-    dialog --title "Disk selection" \
-      --msgbox "Sorry, no disks found. Please make sure to have a hard disk attached to your system/VM." 0 0
-    return 1
-  fi
-
-  # display disk ID next to the disk name
-  DISK_LIST=( $(for i in $AVAILABLE_DISKS ; do
-                for file in /dev/disk/by-id/* ; do
-                   case "$(realpath "$file")" in
-                     (/dev/"$i") disk_info="${file#/dev/disk/by-id/}" ; break ;;
-                             (*) disk_info="$file" ;;
-                   esac
-                done
-                echo "${i}" "${disk_info}"
-              done) )
-
-  TMP=$(mktemp)
-  if ! dialog --title "Disk selection" --single-quoted \
-    --ok-label OK --cancel-label Exit \
-    --menu "Please select the target disk for installing Debian/ngcp:" 0 0 0 \
-    "${DISK_LIST[@]}" 2>"${TMP}" ; then
-    rm -f "${TMP}"
-    ewarn "Cancelling as requested by user during disk selection." ; eend 0
-    return 1
-  fi
-  TARGET_DISK="$(cat "${TMP}")"; rm -f "${TMP}"
-}
-# }}}
-
-
 deploy() {
   # choose appropriate deployment.sh script:
   local version=$(grep -Eo '\<ngcpvers=[^ ]+' /proc/cmdline || true)
@@ -128,7 +93,7 @@ deploy() {
 
   einfo "Running ${YELLOW}${version}${NORMAL} of deployment.sh..."; eend 0
   RC=0
-  TARGET_DISK="$TARGET_DISK" "${scripts_dir}/deployment.sh" || RC=$?
+  "${scripts_dir}/deployment.sh" || RC=$?
   if [ $RC -eq 0 ] ; then
     if dialog --yes-label Reboot --no-label Exit --yesno "Successfully finished deployment, enjoy your sip:provider system. Reboot system now?" 0 0 ; then
       reboot
@@ -147,7 +112,15 @@ install_sipwise_keyring
 "${scripts_dir}/check_installing_version.sh"
 "${scripts_dir}/install_required_packages.sh"
 "${scripts_dir}/verify_iso_image.sh"
-prompt_for_target
+"${scripts_dir}/disk_selection.sh"
+if [[ ! -r '/tmp/disk_options' ]]; then
+  eerror "There is no /tmp/disk_options which should be availible after disk selection" ; eend 0
+fi
+DISK_OPTIONS="$(cat '/tmp/disk_options')"
+if [[ -z "${DISK_OPTIONS}" ]]; then
+  ewarn "There are no disk options configured, continuing anyway." ; eend 0
+fi
+export ${DISK_OPTIONS}
 check_for_existing_pvs
 report_ssh_password
 deploy