A command for DDEV which takes a backup of either the database, files OR a full backup. Drop into your .ddev/commands/web folder and modify accordingly.

ddev-backup.sh

#!/bin/bash

#
# A simple backup script to back up the database, files, or both.
#
# Usage: ddev backup {db|files|full}
#
# db:    Export the database and save it to the backups/db directory.
# files: Zip the public_html folder and save it to the backups/files directory.
# full:  Export the database, save it to the site folder, zip the
#        site folder, and save it to the backups/full directory.
#        Database backup is removed from site folder after zipping.
#
# Useful for creating backups of your site before making changes.
# This is an alternative to the ddev snapshot or ddev export commands.
# It is useful if you need to send a copy of the site to someone else,
# or create routine full snapshots of the site with both the files and database,
# which you can't do with the ddev snapshot command since that only
# includes the database.
#

# Define the project vars
current_date=$(date +"%Y-%m-%d_%H-%M-%S")
project_root="/var/www/html"
docroot=${DDEV_DOCROOT:-public_html}
site_root="$project_root/$docroot"
db_folder="$project_root/backups/db"
files_folder="$project_root/backups/files"
full_folder="$project_root/backups/full"

# Define the database and zip backup paths.
db_backup_file="${DDEV_SITENAME}_db-backup_$current_date.mysql.gz"
db_backup_file_path="$db_folder/$db_backup_file"
files_backup_file="${DDEV_SITENAME}_files-backup_$current_date.zip"
files_backup_file_path="$files_folder/$files_backup_file"
full_backup_file="${DDEV_SITENAME}_full-backup_$current_date.zip"
full_backup_file_path="$full_folder/$full_backup_file"

# Create the backups directories if they don't exist
echo "Step 1: Creating directories..."
mkdir -p "$db_folder" "$files_folder" "$full_folder"
echo "Success! Created necessary directories."

# Function to back up the database
backup_db() {
  echo "Step 2: Exporting database..."
  mysqldump --no-tablespaces -u db -pdb --single-transaction db | gzip > "$db_backup_file_path"
  echo "Success! Database backup saved to $db_backup_file_path"
}

# Function to back up the files
backup_files() {
  echo "Step 3: Zipping files..."
  cd "$project_root" || exit 1
  zip -r "$files_backup_file_path" "$docroot" >/dev/null
  echo "Success! Files backup saved to $files_backup_file_path"
}

# Function to back up both the database and files
backup_full() {
  backup_db
  echo "Step 4: Bundling everything up..."
  cd "$site_root" || exit 1
  mv "$db_backup_file_path" "$site_root"
  zip -r "$full_backup_file_path" "." >/dev/null
  echo "Success! Full backup saved to $full_backup_file_path"
  rm -f "$site_root/$db_backup_file"
  rm -f "$db_backup_file_path"
  echo "Success! Removed the temporary database backup file."
}

# Check the argument and perform the corresponding backup
case "$1" in
  db)
    backup_db
    ;;
  files)
    backup_files
    ;;
  full)
    backup_full
    ;;
  *)
    echo "Usage: $0 {db|files|full}"
    exit 1
    ;;
esac

# Completion message
echo "Backup process completed!"