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Improved swap configuration with retries

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buildplan
2025-11-27 15:06:12 +00:00
parent c5a1621ae6
commit 1f0a20d998
1 changed files with 57 additions and 40 deletions
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97
du_setup.sh
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@@ -4885,6 +4885,7 @@ configure_swap() {
fi
print_section "Swap Configuration"
# Check for existing swap partition entries in fstab
if lsblk -r | grep -q '\[SWAP\]'; then
print_warning "Existing swap partition found on disk."
fi
@@ -4912,7 +4913,6 @@ configure_swap() {
fi
sed -i "s|^${existing_swap}[[:space:]]|#&|" /etc/fstab
local swap_uuid
swap_uuid=$(blkid -s UUID -o value "$existing_swap" 2>/dev/null || true)
if [[ -n "$swap_uuid" ]]; then
@@ -4920,7 +4920,6 @@ configure_swap() {
fi
print_success "Swap partition disabled and removed from fstab."
existing_swap=""
else
print_info "Keeping existing swap partition."
@@ -4928,39 +4927,47 @@ configure_swap() {
return 0
fi
else
# --- Case 2: Swap File detected ---
# --- Case 2: Resize Existing Swap File ---
if confirm "Modify existing swap file size?"; then
local SWAP_SIZE
local SWAP_SIZE REQUIRED_MB
while true; do
read -rp "$(printf '%s' "${CYAN}Enter new swap size (e.g., 2G, 512M) [current: $display_size]: ${NC}")" SWAP_SIZE
SWAP_SIZE=${SWAP_SIZE:-$display_size}
if convert_to_mb "$SWAP_SIZE" >/dev/null; then
break
# 1. Validate Format
if ! REQUIRED_MB=$(convert_to_mb "$SWAP_SIZE"); then
continue
fi
# 2. Min Size
if (( REQUIRED_MB < 128 )); then
print_error "Swap size too small (minimum: 128M)."
continue
fi
# 3. Disk Space Check
local AVAILABLE_KB AVAILABLE_MB
AVAILABLE_KB=$(df -k / | tail -n 1 | awk '{print $4}')
AVAILABLE_MB=$((AVAILABLE_KB / 1024))
if (( AVAILABLE_MB < REQUIRED_MB )); then
print_error "Insufficient disk space. Required: ${REQUIRED_MB}MB, Available: ${AVAILABLE_MB}MB"
# Suggest Max Safe Size (80% of free space)
local MAX_SAFE_MB=$(( AVAILABLE_MB * 80 / 100 ))
if (( MAX_SAFE_MB >= 128 )); then
print_info "Suggested maximum: ${MAX_SAFE_MB}M (leaves 20% free space)"
fi
continue
fi
break
done
local REQUIRED_MB AVAILABLE_KB
if ! REQUIRED_MB=$(convert_to_mb "$SWAP_SIZE"); then return 1; fi
AVAILABLE_KB=$(df -k / | tail -n 1 | awk '{print $4}')
# Compare (Convert MB to KB for comparison)
if (( (AVAILABLE_KB / 1024) < REQUIRED_MB )); then
print_error "Insufficient disk space. Required: ${REQUIRED_MB}MB, Available: $((AVAILABLE_KB / 1024))MB"
exit 1
fi
print_info "Disabling existing swap file..."
swapoff "$existing_swap" || { print_error "Failed to disable swap file."; exit 1; }
print_info "Resizing swap file to $SWAP_SIZE..."
# Try fallocate first (fast), fallback to dd (compatible)
# Try fallocate, fallback to dd
if ! fallocate -l "$SWAP_SIZE" "$existing_swap" 2>/dev/null; then
print_warning "fallocate failed. Using dd (slower)..."
rm -f "$existing_swap"
# Check if dd supports progress
local dd_status=""
if dd --version 2>&1 | grep -q "progress"; then dd_status="status=progress"; fi
@@ -4990,44 +4997,52 @@ configure_swap() {
return 0
fi
local SWAP_SIZE
local SWAP_SIZE REQUIRED_MB
while true; do
read -rp "$(printf '%s' "${CYAN}Enter swap file size (e.g., 2G, 512M) [2G]: ${NC}")" SWAP_SIZE
SWAP_SIZE=${SWAP_SIZE:-2G}
if convert_to_mb "$SWAP_SIZE" >/dev/null; then break; fi
# 1. Validate Format
if ! REQUIRED_MB=$(convert_to_mb "$SWAP_SIZE"); then
continue
fi
# 2. Min Size
if (( REQUIRED_MB < 128 )); then
print_error "Swap size too small (minimum: 128M)."
continue
fi
# 3. Disk Space Check
local AVAILABLE_KB AVAILABLE_MB
AVAILABLE_KB=$(df -k / | tail -n 1 | awk '{print $4}')
AVAILABLE_MB=$((AVAILABLE_KB / 1024))
if (( AVAILABLE_MB < REQUIRED_MB )); then
print_error "Insufficient disk space. Required: ${REQUIRED_MB}MB, Available: ${AVAILABLE_MB}MB"
# Suggest Max Safe Size
local MAX_SAFE_MB=$(( AVAILABLE_MB * 80 / 100 ))
if (( MAX_SAFE_MB >= 128 )); then
print_info "Suggested maximum: ${MAX_SAFE_MB}M (leaves 20% free space)"
fi
continue
fi
break
done
local REQUIRED_MB AVAILABLE_KB
if ! REQUIRED_MB=$(convert_to_mb "$SWAP_SIZE"); then return 1; fi
AVAILABLE_KB=$(df -k / | tail -n 1 | awk '{print $4}')
if (( (AVAILABLE_KB / 1024) < REQUIRED_MB )); then
print_error "Insufficient disk space. Required: ${REQUIRED_MB}MB, Available: $((AVAILABLE_KB / 1024))MB"
exit 1
fi
print_info "Creating $SWAP_SIZE swap file at /swapfile..."
if ! fallocate -l "$SWAP_SIZE" /swapfile 2>/dev/null; then
print_warning "fallocate failed. Using dd (slower)..."
# Check dd status support
local dd_status=""
if dd --version 2>&1 | grep -q "progress"; then dd_status="status=progress"; fi
if ! dd if=/dev/zero of=/swapfile bs=1M count="$REQUIRED_MB" $dd_status; then
print_error "Failed to create swap file."
rm -f /swapfile || true
exit 1
fi
fi
if ! chmod 600 /swapfile || ! mkswap /swapfile >/dev/null || ! swapon /swapfile; then
print_error "Failed to enable swap file."
rm -f /swapfile || true
exit 1
fi
# Add to fstab if missing
if ! grep -q '^/swapfile ' /etc/fstab; then
echo '/swapfile none swap sw 0 0' >> /etc/fstab
print_success "Swap entry added to /etc/fstab."
@@ -5092,7 +5107,7 @@ EOF
log "Swap configuration completed."
}
# Helper: Convert size (e.g., 2G) to MB for dd count
# Helper: Convert size (e.g., 2G) to MB for validation/dd
convert_to_mb() {
local input="${1:-}"
local size="${input^^}"
@@ -5106,8 +5121,10 @@ convert_to_mb() {
case "$unit" in
G) echo "$((num * 1024))" ;;
M) echo "$num" ;;
*) print_error "Unknown or missing unit in swap size: '$input'. Use 'M' or 'G' (e.g., 2G)." >&2
return 1 ;;
*)
print_error "Unknown or missing unit in swap size: '$input'. Use 'M' or 'G'." >&2
return 1
;;
esac
}