394 lines
12 KiB
Ruby
394 lines
12 KiB
Ruby
# frozen_string_literal: true
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require "mini_mime"
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module BackupRestore
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class Backuper
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attr_reader :success
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def initialize(user_id, opts = {})
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@user_id = user_id
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@client_id = opts[:client_id]
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@publish_to_message_bus = opts[:publish_to_message_bus] || false
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@with_uploads = opts[:with_uploads].nil? ? true : opts[:with_uploads]
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@filename_override = opts[:filename]
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ensure_no_operation_is_running
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ensure_we_have_a_user
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initialize_state
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end
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def run
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log "[STARTED]"
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log "'#{@user.username}' has started the backup!"
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mark_backup_as_running
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listen_for_shutdown_signal
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ensure_directory_exists(@tmp_directory)
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ensure_directory_exists(@archive_directory)
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### READ-ONLY / START ###
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enable_readonly_mode
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begin
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pause_sidekiq
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wait_for_sidekiq
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dump_public_schema
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ensure
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unpause_sidekiq
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end
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disable_readonly_mode
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### READ-ONLY / END ###
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log "Finalizing backup..."
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@with_uploads ? create_archive : move_dump_backup
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upload_archive
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after_create_hook
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rescue SystemExit
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log "Backup process was cancelled!"
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rescue Exception => ex
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log "EXCEPTION: " + ex.message
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log ex.backtrace.join("\n")
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@success = false
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else
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@success = true
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@backup_filename
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ensure
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delete_old
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clean_up
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notify_user
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log "Finished!"
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@success ? log("[SUCCESS]") : log("[FAILED]")
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end
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protected
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def ensure_no_operation_is_running
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raise BackupRestore::OperationRunningError if BackupRestore.is_operation_running?
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end
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def ensure_we_have_a_user
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@user = User.find_by(id: @user_id)
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raise Discourse::InvalidParameters.new(:user_id) unless @user
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end
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def initialize_state
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@success = false
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@store = BackupRestore::BackupStore.create
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@current_db = RailsMultisite::ConnectionManagement.current_db
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@timestamp = Time.now.strftime("%Y-%m-%d-%H%M%S")
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@tmp_directory = File.join(Rails.root, "tmp", "backups", @current_db, @timestamp)
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@dump_filename = File.join(@tmp_directory, BackupRestore::DUMP_FILE)
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@archive_directory = BackupRestore::LocalBackupStore.base_directory(db: @current_db)
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filename = @filename_override || "#{SiteSetting.title.parameterize}-#{@timestamp}"
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@archive_basename = File.join(@archive_directory, "#{filename}-#{BackupRestore::VERSION_PREFIX}#{BackupRestore.current_version}")
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@backup_filename =
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if @with_uploads
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"#{File.basename(@archive_basename)}.tar.gz"
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else
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"#{File.basename(@archive_basename)}.sql.gz"
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end
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@logs = []
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@readonly_mode_was_enabled = Discourse.readonly_mode? || !SiteSetting.readonly_mode_during_backup
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end
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def listen_for_shutdown_signal
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Thread.new do
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while BackupRestore.is_operation_running?
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exit if BackupRestore.should_shutdown?
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sleep 0.1
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end
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end
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end
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def mark_backup_as_running
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log "Marking backup as running..."
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BackupRestore.mark_as_running!
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end
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def enable_readonly_mode
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return if @readonly_mode_was_enabled
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log "Enabling readonly mode..."
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Discourse.enable_readonly_mode
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end
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def pause_sidekiq
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log "Pausing sidekiq..."
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Sidekiq.pause!
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end
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def wait_for_sidekiq
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log "Waiting for sidekiq to finish running jobs..."
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iterations = 1
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while sidekiq_has_running_jobs?
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log "Waiting for sidekiq to finish running jobs... ##{iterations}"
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sleep 5
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iterations += 1
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raise "Sidekiq did not finish running all the jobs in the allowed time!" if iterations > 6
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end
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end
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def sidekiq_has_running_jobs?
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Sidekiq::Workers.new.each do |_, _, worker|
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payload = worker.try(:payload)
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return true if payload.try(:all_sites)
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return true if payload.try(:current_site_id) == @current_db
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end
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false
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end
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def dump_public_schema
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log "Dumping the public schema of the database..."
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logs = Queue.new
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pg_dump_running = true
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Thread.new do
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RailsMultisite::ConnectionManagement::establish_connection(db: @current_db)
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while pg_dump_running
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message = logs.pop.strip
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log(message) unless message.blank?
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end
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end
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IO.popen("#{pg_dump_command} 2>&1") do |pipe|
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begin
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while line = pipe.readline
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logs << line
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end
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rescue EOFError
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# finished reading...
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ensure
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pg_dump_running = false
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logs << ""
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end
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end
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raise "pg_dump failed" unless $?.success?
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end
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def pg_dump_command
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db_conf = BackupRestore.database_configuration
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password_argument = "PGPASSWORD='#{db_conf.password}'" if db_conf.password.present?
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host_argument = "--host=#{db_conf.host}" if db_conf.host.present?
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port_argument = "--port=#{db_conf.port}" if db_conf.port.present?
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username_argument = "--username=#{db_conf.username}" if db_conf.username.present?
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[ password_argument, # pass the password to pg_dump (if any)
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"pg_dump", # the pg_dump command
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"--schema=public", # only public schema
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"--file='#{@dump_filename}'", # output to the dump.sql file
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"--no-owner", # do not output commands to set ownership of objects
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"--no-privileges", # prevent dumping of access privileges
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"--verbose", # specifies verbose mode
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"--compress=4", # Compression level of 4
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host_argument, # the hostname to connect to (if any)
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port_argument, # the port to connect to (if any)
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username_argument, # the username to connect as (if any)
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db_conf.database # the name of the database to dump
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].join(" ")
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end
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def move_dump_backup
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log "Finalizing database dump file: #{@backup_filename}"
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archive_filename = File.join(@archive_directory, @backup_filename)
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Discourse::Utils.execute_command(
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'mv', @dump_filename, archive_filename,
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failure_message: "Failed to move database dump file."
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)
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remove_tmp_directory
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end
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def create_archive
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log "Creating archive: #{@backup_filename}"
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tar_filename = "#{@archive_basename}.tar"
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log "Making sure archive does not already exist..."
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Discourse::Utils.execute_command('rm', '-f', tar_filename)
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Discourse::Utils.execute_command('rm', '-f', "#{tar_filename}.gz")
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log "Creating empty archive..."
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Discourse::Utils.execute_command('tar', '--create', '--file', tar_filename, '--files-from', '/dev/null')
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log "Archiving data dump..."
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FileUtils.cd(File.dirname(@dump_filename)) do
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Discourse::Utils.execute_command(
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'tar', '--append', '--dereference', '--file', tar_filename, File.basename(@dump_filename),
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failure_message: "Failed to archive data dump."
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)
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end
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upload_directory = "uploads/" + @current_db
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log "Archiving uploads..."
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FileUtils.cd(File.join(Rails.root, "public")) do
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if File.directory?(upload_directory)
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exclude_optimized = SiteSetting.include_thumbnails_in_backups ? '' : "--exclude=#{upload_directory}/optimized"
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Discourse::Utils.execute_command(
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'tar', '--append', '--dereference', exclude_optimized, '--file', tar_filename, upload_directory,
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failure_message: "Failed to archive uploads.", success_status_codes: [0, 1]
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)
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else
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log "No uploads found, skipping archiving uploads..."
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end
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end
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remove_tmp_directory
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log "Gzipping archive, this may take a while..."
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Discourse::Utils.execute_command(
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'gzip', "-#{SiteSetting.backup_gzip_compression_level_for_uploads}", tar_filename,
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failure_message: "Failed to gzip archive."
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)
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end
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def upload_archive
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return unless @store.remote?
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log "Uploading archive..."
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content_type = MiniMime.lookup_by_filename(@backup_filename).content_type
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archive_path = File.join(@archive_directory, @backup_filename)
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@store.upload_file(@backup_filename, archive_path, content_type)
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end
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def after_create_hook
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log "Executing the after_create_hook for the backup..."
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DiscourseEvent.trigger(:backup_created)
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end
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def delete_old
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return if Rails.env.development?
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log "Deleting old backups..."
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@store.delete_old
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rescue => ex
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log "Something went wrong while deleting old backups.", ex
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end
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def notify_user
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return if @success && @user.id == Discourse::SYSTEM_USER_ID
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log "Notifying '#{@user.username}' of the end of the backup..."
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status = @success ? :backup_succeeded : :backup_failed
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post = SystemMessage.create_from_system_user(
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@user, status, logs: Discourse::Utils.pretty_logs(@logs)
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)
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if @user.id == Discourse::SYSTEM_USER_ID
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post.topic.invite_group(@user, Group[:admins])
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end
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rescue => ex
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log "Something went wrong while notifying user.", ex
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end
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def clean_up
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log "Cleaning stuff up..."
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delete_uploaded_archive
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remove_tar_leftovers
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disable_readonly_mode if Discourse.readonly_mode?
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mark_backup_as_not_running
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refresh_disk_space
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end
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def delete_uploaded_archive
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return unless @store.remote?
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archive_path = File.join(@archive_directory, @backup_filename)
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if File.exist?(archive_path)
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log "Removing archive from local storage..."
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File.delete(archive_path)
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end
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rescue => ex
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log "Something went wrong while deleting uploaded archive from local storage.", ex
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end
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def refresh_disk_space
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log "Refreshing disk stats..."
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@store.reset_cache
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rescue => ex
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log "Something went wrong while refreshing disk stats.", ex
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end
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def remove_tar_leftovers
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log "Removing '.tar' leftovers..."
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Dir["#{@archive_directory}/*.tar"].each { |filename| File.delete(filename) }
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rescue => ex
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log "Something went wrong while removing '.tar' leftovers.", ex
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end
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def remove_tmp_directory
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log "Removing tmp '#{@tmp_directory}' directory..."
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FileUtils.rm_rf(@tmp_directory) if Dir[@tmp_directory].present?
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rescue => ex
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log "Something went wrong while removing the following tmp directory: #{@tmp_directory}", ex
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end
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def unpause_sidekiq
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return unless Sidekiq.paused?
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log "Unpausing sidekiq..."
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Sidekiq.unpause!
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rescue => ex
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log "Something went wrong while unpausing Sidekiq.", ex
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end
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def disable_readonly_mode
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return if @readonly_mode_was_enabled
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log "Disabling readonly mode..."
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Discourse.disable_readonly_mode
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rescue => ex
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log "Something went wrong while disabling readonly mode.", ex
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end
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def mark_backup_as_not_running
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log "Marking backup as finished..."
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BackupRestore.mark_as_not_running!
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rescue => ex
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log "Something went wrong while marking backup as finished.", ex
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end
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def ensure_directory_exists(directory)
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log "Making sure '#{directory}' exists..."
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FileUtils.mkdir_p(directory)
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end
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def log(message, ex = nil)
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timestamp = Time.now.strftime("%Y-%m-%d %H:%M:%S")
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puts(message)
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publish_log(message, timestamp)
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save_log(message, timestamp)
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Rails.logger.error("#{ex}\n" + ex.backtrace.join("\n")) if ex
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end
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def publish_log(message, timestamp)
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return unless @publish_to_message_bus
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data = { timestamp: timestamp, operation: "backup", message: message }
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MessageBus.publish(BackupRestore::LOGS_CHANNEL, data, user_ids: [@user_id], client_ids: [@client_id])
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end
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def save_log(message, timestamp)
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@logs << "[#{timestamp}] #{message}"
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end
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end
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end
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