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fix(mkfs): correctly handle already-formatted disks and conditional overwrite

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- Updated `already_formatted()` to use `blkid` plus safe read-only mount for accurate filesystem detection.
- Added conditional `-f` flag to `mkfs` only when `overwrite: true` is set.
- Removed `continue` statements from the shell script to prevent runtime errors.
- Updated Go overlay snapshot tests to reflect new template rendering.
- Ensures disks with leftover signatures but no valid filesystem are properly reformatted during node provisioning.
This commit is contained in:
kosmolito
2025-09-28 23:55:51 +02:00
committed by Jonathon Anderson
parent 51869acf95
commit 378abfc373
2 changed files with 71 additions and 40 deletions
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83
overlays/mkfs/internal/mkfs_test.go
View File

@@ -39,17 +39,26 @@ if ! command -v die >/dev/null; then
fi
already_formatted() {
if ! command -v wipefs >/dev/null ; then
info "warewulf: wipefs not found, cannot check if device is already formatted"
return 0
fi
dev="$1"
if wipefs -n "${1}" &>/dev/null; then
info "warewulf: ${1} already formatted"
return 0
fi
# Step 1: check if blkid recognizes a filesystem
fs_type=$(blkid -o value -s TYPE "$dev" 2>/dev/null)
if [ -z "$fs_type" ]; then
# No recognized filesystem
return 1
fi
# Step 2: try mounting read-only to a temp dir
tmpdir=$(mktemp -d)
if mount -o ro,norecovery -t "$fs_type" "$dev" "$tmpdir" >/dev/null 2>&1; then
umount "$tmpdir"
rmdir "$tmpdir"
return 0 # usable filesystem
else
rmdir "$tmpdir"
return 1 # filesystem exists but not mountable → treat as unformatted
fi
}
if command -v mkfs >/dev/null ; then :
@@ -89,17 +98,26 @@ if ! command -v die >/dev/null; then
fi
already_formatted() {
if ! command -v wipefs >/dev/null ; then
info "warewulf: wipefs not found, cannot check if device is already formatted"
return 0
fi
dev="$1"
if wipefs -n "${1}" &>/dev/null; then
info "warewulf: ${1} already formatted"
return 0
fi
# Step 1: check if blkid recognizes a filesystem
fs_type=$(blkid -o value -s TYPE "$dev" 2>/dev/null)
if [ -z "$fs_type" ]; then
# No recognized filesystem
return 1
fi
# Step 2: try mounting read-only to a temp dir
tmpdir=$(mktemp -d)
if mount -o ro,norecovery -t "$fs_type" "$dev" "$tmpdir" >/dev/null 2>&1; then
umount "$tmpdir"
rmdir "$tmpdir"
return 0 # usable filesystem
else
rmdir "$tmpdir"
return 1 # filesystem exists but not mountable → treat as unformatted
fi
}
if command -v mkfs >/dev/null ; then :
@@ -108,14 +126,12 @@ if command -v mkfs >/dev/null ; then :
mkfs --type=ext4 /dev/disk/by-partlabel/rootfs || die "warewulf: mkfs: failed to format /dev/disk/by-partlabel/rootfs"
else
info "warewulf: mkfs: skipping /dev/disk/by-partlabel/rootfs"
continue
fi
if true || ! already_formatted /dev/disk/by-partlabel/scratch; then
info "warewulf: mkfs: formatting /dev/disk/by-partlabel/scratch"
mkfs --type=ext4 /dev/disk/by-partlabel/scratch || die "warewulf: mkfs: failed to format /dev/disk/by-partlabel/scratch"
mkfs --type=ext4 -f /dev/disk/by-partlabel/scratch || die "warewulf: mkfs: failed to format /dev/disk/by-partlabel/scratch"
else
info "warewulf: mkfs: skipping /dev/disk/by-partlabel/scratch"
continue
fi
else
info "warewulf: mkfs not found"
@@ -157,17 +173,26 @@ if ! command -v die >/dev/null; then
fi
already_formatted() {
if ! command -v wipefs >/dev/null ; then
info "warewulf: wipefs not found, cannot check if device is already formatted"
return 0
fi
dev="$1"
if wipefs -n "${1}" &>/dev/null; then
info "warewulf: ${1} already formatted"
return 0
fi
# Step 1: check if blkid recognizes a filesystem
fs_type=$(blkid -o value -s TYPE "$dev" 2>/dev/null)
if [ -z "$fs_type" ]; then
# No recognized filesystem
return 1
fi
# Step 2: try mounting read-only to a temp dir
tmpdir=$(mktemp -d)
if mount -o ro,norecovery -t "$fs_type" "$dev" "$tmpdir" >/dev/null 2>&1; then
umount "$tmpdir"
rmdir "$tmpdir"
return 0 # usable filesystem
else
rmdir "$tmpdir"
return 1 # filesystem exists but not mountable → treat as unformatted
fi
}
if command -v mkfs >/dev/null ; then :
@@ -176,14 +201,12 @@ if command -v mkfs >/dev/null ; then :
mkfs --type=ext4 /dev/disk/by-partlabel/rootfs || die "warewulf: mkfs: failed to format /dev/disk/by-partlabel/rootfs"
else
info "warewulf: mkfs: skipping /dev/disk/by-partlabel/rootfs"
continue
fi
if true || ! already_formatted /dev/disk/by-partlabel/scratch; then
info "warewulf: mkfs: formatting /dev/disk/by-partlabel/scratch"
mkfs --type=ext4 /dev/disk/by-partlabel/scratch || die "warewulf: mkfs: failed to format /dev/disk/by-partlabel/scratch"
mkfs --type=ext4 -f /dev/disk/by-partlabel/scratch || die "warewulf: mkfs: failed to format /dev/disk/by-partlabel/scratch"
else
info "warewulf: mkfs: skipping /dev/disk/by-partlabel/scratch"
continue
fi
else
info "warewulf: mkfs not found"

28
overlays/mkfs/rootfs/warewulf/wwinit.d/20-mkfs.sh.ww
View File

@@ -16,17 +16,26 @@ if ! command -v die >/dev/null; then
fi
already_formatted() {
if ! command -v wipefs >/dev/null ; then
info "warewulf: wipefs not found, cannot check if device is already formatted"
return 0
fi
dev="$1"
if wipefs -n "${1}" &>/dev/null; then
info "warewulf: ${1} already formatted"
return 0
fi
# Step 1: check if blkid recognizes a filesystem
fs_type=$(blkid -o value -s TYPE "$dev" 2>/dev/null)
if [ -z "$fs_type" ]; then
# No recognized filesystem
return 1
fi
# Step 2: try mounting read-only to a temp dir
tmpdir=$(mktemp -d)
if mount -o ro,norecovery -t "$fs_type" "$dev" "$tmpdir" >/dev/null 2>&1; then
umount "$tmpdir"
rmdir "$tmpdir"
return 0 # usable filesystem
else
rmdir "$tmpdir"
return 1 # filesystem exists but not mountable → treat as unformatted
fi
}
if command -v mkfs >/dev/null ; then :
@@ -57,10 +66,9 @@ if command -v mkfs >/dev/null ; then :
{{- if and $fs.type $fs.device }}
if {{if $fs.overwrite}}true{{else}}false{{end}} || ! already_formatted {{ $fs.device }}; then
info "warewulf: mkfs: formatting {{ $fs.device }}"
mkfs {{ not (empty $fs.type) | ternary (print "--type=" $fs.type) "" }} {{ not (empty $fs.label) | ternary (print "-L " $fs.label) "" }} {{ not (empty $fs.uuid) | ternary (print "-U " $fs.uuid) "" }} {{ default "" $fs.options }} {{ $fs.device }} {{ default "" $fs.size }} || die "warewulf: mkfs: failed to format {{ $fs.device }}"
mkfs {{ not (empty $fs.type) | ternary (print "--type=" $fs.type) "" }} {{ not (empty $fs.label) | ternary (print "-L " $fs.label) "" }} {{ not (empty $fs.uuid) | ternary (print "-U " $fs.uuid) "" }} {{ default "" $fs.options }} -f {{ $fs.device }} {{ default "" $fs.size }} || die "warewulf: mkfs: failed to format {{ $fs.device }}"
else
info "warewulf: mkfs: skipping {{ $fs.device }}"
continue
fi
{{- end }}
{{- end }}