feat: Add scripts for Docker cleanup and Vaultwarden database backup.

docker-cleanup.sh

@@ -0,0 +1,89 @@
+#!/bin/bash
+
+# Script: docker-cleanup.sh
+# Description: Cleans up unused Docker images, volumes, networks, and builder cache.
+#              Preserves stopped containers.
+#              Calculates reclaimed space and logs it to syslog.
+# Dependencies: docker, bc, grep (with PCRE support)
+
+USAGE_TAG="docker-cleanup"
+
+# Logging functions
+log_info() {
+    logger -t "$USAGE_TAG" -p user.info "$1"
+}
+
+log_error() {
+    logger -t "$USAGE_TAG" -p user.error "$1"
+}
+
+# Check for 'bc' dependency
+if ! command -v bc &> /dev/null; then
+    log_error "Error: 'bc' is not installed. Please install it (apt install bc) to calculate reclaimed space."
+    # Fail safe: don't run blindly if we can't calculate/log properly, or just run without logging space?
+    # User requested logging to syslog, assuming they want the space report.
+    exit 1
+fi
+
+log_info "Starting Docker cleanup (Images, Volumes, Networks, Builder)..."
+
+# Initialize output variable
+OUTPUT=""
+
+# 1. Prune Images (all unused images, not just dangling) with input 'y' just in case, though -f usually covers it
+# Note: 'image prune -a' removes images not used by ANY container (including stopped ones).
+CMD_OUTPUT=$(docker image prune -a -f 2>&1)
+OUTPUT="${OUTPUT}${CMD_OUTPUT}"$'\n'
+
+# 2. Prune Volumes
+CMD_OUTPUT=$(docker volume prune -f 2>&1)
+OUTPUT="${OUTPUT}${CMD_OUTPUT}"$'\n'
+
+# 3. Prune Networks
+CMD_OUTPUT=$(docker network prune -f 2>&1)
+OUTPUT="${OUTPUT}${CMD_OUTPUT}"$'\n'
+
+# 4. Prune Builder Cache
+CMD_OUTPUT=$(docker builder prune -f 2>&1)
+OUTPUT="${OUTPUT}${CMD_OUTPUT}"$'\n'
+
+# Check for critical failures (though docker commands might succeed partially)
+# We proceed to calculate space regardless.
+
+# Extract reclaimed space amounts using grep with Perl-compatible regex.
+RECLAIMED_SPACES=$(echo "$OUTPUT" | grep -Po '(?<=Total reclaimed space: )[0-9.]+[A-Z]+' | grep -v '^0B$')
+
+# Initialize total reclaimed space counter
+TOTAL_RECLAIMED=0
+
+# Loop through each reclaimed space value
+for SPACE in $RECLAIMED_SPACES; do
+  # Extract the unit (KB, MB, GB)
+  UNIT=${SPACE: -2}
+  # Extract the numeric value
+  VALUE=${SPACE%${UNIT}}
+  
+  # Normalize to GB
+  case $UNIT in
+    kB|KB) VAL_IN_GB=$(echo "$VALUE / 1024 / 1024" | bc -l) ;;
+    mB|MB) VAL_IN_GB=$(echo "$VALUE / 1024" | bc -l) ;;
+    gB|GB) VAL_IN_GB=$VALUE ;;
+    *) VAL_IN_GB=0 ;; 
+  esac
+
+  # Add to total
+  TOTAL_RECLAIMED=$(echo "$TOTAL_RECLAIMED + $VAL_IN_GB" | bc -l)
+done
+
+# Check if we reclaimed anything significant (greater than 0)
+IS_POSITIVE=$(echo "$TOTAL_RECLAIMED > 0" | bc -l)
+
+if [ "$IS_POSITIVE" -eq 1 ]; then
+  # Format to 3 decimal places
+  FORMATTED_TOTAL=$(printf "%.3f" "$TOTAL_RECLAIMED")
+  log_info "Cleanup finished. Total reclaimed space: ${FORMATTED_TOTAL} GB"
+else
+  log_info "Cleanup finished. No significant space was reclaimed."
+fi
+
+exit 0