From 1834d0aeeb6b90b9dcf49103867b91c389e31347 Mon Sep 17 00:00:00 2001
From: Elena Taivan <elena.taivan@windriver.com>
Date: Wed, 29 May 2019 13:42:13 +0000
Subject: [PATCH] B&R: Skip Ceph osds from getting wiped during initial
 installation

To keep ceph-mon data intact at restore, ceph osds should not be wiped.
Every ceph osd has a Globally unique identifier(GUID) and based on this
GUID ceph osds are not added in list of devices to wipe.
Since installation is the same on restore as on a fresh install we need
to keep ceph data intact then delegate the wipe to ansible if we are not
at restore (or we are at restore but user does not want to keep ceph's
data). To keep the previous behavior, when any other node is installed
we wipe Ceph.

Story: 2004761
Task: 34283
Change-Id: Ief93da56c1344ab259e674ca8d79f9952fefcd2b
Signed-off-by: Elena Taivan <elena.taivan@windriver.com>
---
 .../kickstarts/pre_disk_setup_common.cfg      | 41 +++++++++++++++++--
 1 file changed, 38 insertions(+), 3 deletions(-)

diff --git a/bsp-files/kickstarts/pre_disk_setup_common.cfg b/bsp-files/kickstarts/pre_disk_setup_common.cfg
index 173b9b1a..7d57e83a 100644
--- a/bsp-files/kickstarts/pre_disk_setup_common.cfg
+++ b/bsp-files/kickstarts/pre_disk_setup_common.cfg
@@ -66,6 +66,16 @@ fi
 # Deactivate existing volume groups to avoid Anaconda issues with pre-existing groups
 vgs --noheadings -o vg_name | xargs --no-run-if-empty -n 1 vgchange -an
 
+# Check if active controller is available
+curl -sf http://pxecontroller:6385/v1 2>&1 >/dev/null
+if [ $? -eq 0 ]; then
+    echo "Active controller detected."
+    ACTIVE_EXISTS="true"
+else
+    echo "No active controller detected, this is the initial install."
+    ACTIVE_EXISTS="false"
+fi
+
 ONLYUSE_HDD=""
 if [ "$(curl -sf http://pxecontroller:6385/v1/upgrade/$(hostname)/in_upgrade 2>/dev/null)" = "true" ]; then
     # In an upgrade, only wipe the disk with the rootfs and boot partition
@@ -79,6 +89,10 @@ if [ "$(curl -sf http://pxecontroller:6385/v1/upgrade/$(hostname)/in_upgrade 2>/
 else
     # Make a list of all the hard drives that are to be wiped
     WIPE_HDD=""
+    # Partition type OSD has a unique globally identifier
+    part_type_guid_str="Partition GUID code"
+    CEPH_OSD_GUID="4FBD7E29-9D25-41B8-AFD0-062C0CEFF05D"
+
     for f in /dev/disk/by-path/*
     do
         dev=$(readlink -f $f)
@@ -91,16 +105,37 @@ else
         # Avoid wiping USB drives
         udevadm info --query=property --name=$dev |grep -q '^ID_BUS=usb' && continue
 
+        # Avoid wiping ceph osds on initial install
+        if [ ${ACTIVE_EXISTS} == "false" ]; then
+            wipe_dev="true"
+            part_numbers=( `parted -s $dev print | awk '$1 == "Number" {i=1; next}; i {print $1}'` )
+            # Scanning the partitions looking for CEPH OSDs and
+            # skipping any disk found with such partitions
+            for part_number in "${part_numbers[@]}"; do
+                sgdisk_part_info=$(flock $dev sgdisk -i $part_number $dev)
+                part_type_guid=$(echo "$sgdisk_part_info" | grep "$part_type_guid_str" | awk '{print $4;}')
+                if [ "$part_type_guid" == $CEPH_OSD_GUID ]; then
+                    echo "OSD found on $dev, skipping wipe"
+                    wipe_dev="false"
+                    break
+                fi
+            done
+            if [ "$wipe_dev" == "false" ]; then
+                continue
+            fi
+        fi
+
+        # Add device to the wipe list
         devname=$(basename $dev)
-        if [ -e $dev -a "$ISO_DEV" != "../../$devname" -a "$USB_DEV" != "../../$devname" ] ; then
-            if [ -n "$WIPE_HDD" ] ; then
+        if [ -e $dev -a "$ISO_DEV" != "../../$devname" -a "$USB_DEV" != "../../$devname" ]; then
+            if [ -n "$WIPE_HDD" ]; then
                 WIPE_HDD=$WIPE_HDD,$dev
             else
                 WIPE_HDD=$dev
             fi
         fi
     done
-    echo "Not in upgrade, wiping all disks: $WIPE_HDD"
+    echo "Not in upgrade, wiping disks: $WIPE_HDD"
 fi
 
 for dev in ${WIPE_HDD//,/ }