103 lines
3.7 KiB
Ruby
103 lines
3.7 KiB
Ruby
# frozen_string_literal: true
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require 'json'
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require_relative 'loggman'
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# class for creating, managing and deleting backups both locally and in B2
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class MysqlDatabaseBackup
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def initialize(config_file, logger) # rubocop:disable Metrics/AbcSize, Metrics/CyclomaticComplexity, Metrics/MethodLength, Metrics/PerceivedComplexity
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config = JSON.parse(File.read(config_file))
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@host = config['mysql']['host']
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@username = config['mysql']['username']
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@password = config['mysql']['password']
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@backup_dir = config['backup_dir'] || '.'
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@b2_enabled = config['b2_enabled'] || false
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@b2_key_id = config['b2']&.dig('key_id')
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@b2_application_key = config['b2']&.dig('application_key')
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@b2_bucket_name = config['b2']&.dig('bucket_name')
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@local_retention_days = config['local_retention_days'] || 30
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@b2_retention_days = config['b2']&.dig('retention_days') || 30
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@logger = logger
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end
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def backup # rubocop:disable Metrics/MethodLength
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@logger.info('Backing up MySQL database.')
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timestamp = Time.now.strftime('%Y-%m-%d_%H-%M-%S')
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@logger.info("Timestamp for backup: #{timestamp}")
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databases = find_databases
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databases.each do |database_name|
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backup_file = File.join(@backup_dir, "#{database_name}_#{timestamp}.sql")
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@logger.info("Backup file path: #{backup_file}")
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@logger.info("MySQL Info: #{@host} #{@username} #{@password} #{backup_file}")
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`mysqldump --host=#{@host} --user=#{@username} --password='#{@password}'
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--databases #{database_name} > #{backup_file}`
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delete_old_backups
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upload_to_b2(backup_file) if @b2_enabled
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end
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end
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def find_databases
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databases_output = `mysql --host=#{@host} --user=#{@username} --password='#{@password}' --execute='SHOW DATABASES;'`
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databases = databases_output.split("\n")[1..] # Ignore the first line (header)
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databases.reject { |db| %w[information_schema performance_schema mysql sys].include?(db) }
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end
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def delete_old_backups # rubocop:disable Metrics/MethodLength
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@logger.info('Deleting old backups.')
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max_age_days = @local_retention_days
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max_age_seconds = max_age_days * 24 * 60 * 60
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backups = Dir[File.join(@backup_dir, '*_*.sql')]
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return if backups.empty?
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backups.each do |backup|
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age_seconds = Time.now - File.mtime(backup)
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if age_seconds > max_age_seconds
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@logger.info("Deleted old backup: #{backup}")
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File.delete(backup)
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end
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end
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end
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def upload_to_b2(backup_file) # rubocop:disable Metrics/AbcSize, Metrics/MethodLength
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b2_file_name = File.basename(backup_file)
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b2_file_url = "b2://#{@b2_bucket_name}/#{b2_file_name}"
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# Upload the backup file to the B2 bucket
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`b2 upload-file #{@b2_bucket_name} #{backup_file} #{b2_file_name}`
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@logger.info("Uploaded backup file to B2 bucket: #{b2_file_url}")
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# Calculate the cutoff date based on b2_retention_days
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max_age_days = @b2_retention_days
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cutoff_date = Time.now - (max_age_days * 24 * 60 * 60)
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existing_files = `b2 ls #{@b2_bucket_name}`
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return if existing_files.empty?
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existing_files.each_line do |line|
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file_name = line.split(' ').last.strip
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file_timestamp_str = file_name.match(/_(\d{4}-\d{2}-\d{2}_\d{2}-\d{2}-\d{2})\.sql/)&.captures&.first
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# Skip files that don't match the expected filename format
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next if file_timestamp_str.nil?
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file_timestamp = Time.strptime(file_timestamp_str, '%Y-%m-%d_%H-%M-%S')
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next unless file_timestamp < cutoff_date
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file_id = line.match(/"fileId": "([^"]+)"/)[1]
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`b2 delete-file-version #{@b2_bucket_name} #{file_name} #{file_id}`
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@logger.info("Deleted old backup file from B2 bucket: #{file_name}")
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end
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end
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end
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