🐛 Detect invalid WWN configuration of hbmh.

pkg/services/baremetal/host/detect-linux-on-other-disk.sh

@@ -0,0 +1,56 @@
+#!/bin/bash
+set -euo pipefail
+
+trap 'echo "Warning: A command has failed. Exiting the script. Line was ($0:$LINENO): $(sed -n "${LINENO}p" "$0")"; exit 3' ERR
+
+function usage() {
+    echo "$0 wwn1 [wwn2 ...]"
+    echo "    Check if there is a Linux partition, but skip all WWNs given as arguments"
+    echo "    Background: If we provision a disk, then there must not be a Linux OS on an other partition"
+    echo "    otherwise it is likely that the old OS gets booted, and not the new OS."
+    echo "    Exit 0: If there is no Linux installation found."
+    echo "    Exit 1: There is a Linux on a different disk.".
+    echo "    Exit 3: Unexpected error."
+    echo "Existing WWNs:"
+    lsblk -oNAME,WWN | grep -vi loop || true
+}
+
+if [ $# -eq 0 ]; then
+    echo "Error: No WWN was provided."
+    echo
+    usage
+    exit 3
+fi
+
+# Iterate over all input arguments
+for wwn in "$@"; do
+    if ! lsblk -l -oWWN | grep -qP '^'${wwn}'$'; then
+        echo "$wwn is not a WWN of this machine"
+        echo
+        usage
+        exit 3
+    fi
+done
+fail=0
+while read name wwn type parttype; do
+    if [[ " $* " == *" $wwn "* ]]; then
+        echo "ok: skipping $name $wwn, since it was an argument to the script."
+        continue
+    fi
+    root_directory_content=$(grub-fstest /dev/$name ls / 2>/dev/null || true | tr ' ' '\n' | sort | tr '\n' ' ')
+    if [[ $root_directory_content =~ .*boot/.*etc/.* ]]; then
+        echo "FAIL: $name $wwn $parttype looks like a Linux root partition on another disk."
+        fail=1
+        continue
+    fi
+    if [[ $root_directory_content =~ .*initrd.*vmlinuz.* ]]; then
+        echo "FAIL: $name $wwn $parttype looks like a Linux /boot partition on another disk."
+        fail=1
+        continue
+    fi
+    echo "ok: $name $wwn $parttype, does not look like root Linux partition."
+done < <(lsblk -r -oNAME,WWN,TYPE,PARTTYPENAME | grep -v NAME | grep -i part)
+if [ $fail -eq 1 ]; then
+    exit 1
+fi
+echo "Looks good. No Linux root partition on other devices"