Class: Fluent::MysqlBinlogFlydataInput
- Inherits:
-
MysqlBinlogInput
- Object
- MysqlBinlogInput
- Fluent::MysqlBinlogFlydataInput
- Includes:
- MysqlBinlogFlydataInputPreference
- Defined in:
- lib/flydata/fluent-plugins/in_mysql_binlog_flydata.rb
Constant Summary
Constants included from MysqlBinlogFlydataInputPreference
Fluent::MysqlBinlogFlydataInputPreference::CUSTOM_CONFIG_PARAMS
Instance Method Summary collapse
- #configure(conf) ⇒ Object
- #event_listener(event) ⇒ Object
-
#initialize ⇒ MysqlBinlogFlydataInput
constructor
A new instance of MysqlBinlogFlydataInput.
-
#install_custom_signal_handler ⇒ Object
Hack: All that has been added here is ‘Fluent::Engine.shutdown_source`.
- #run ⇒ Object
- #shutdown ⇒ Object
- #start ⇒ Object
- #start_kodama(options, &block) ⇒ Object
- #wait_till_safe_to_stop ⇒ Object
Methods included from MysqlBinlogFlydataInputPreference
Constructor Details
#initialize ⇒ MysqlBinlogFlydataInput
Returns a new instance of MysqlBinlogFlydataInput.
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# File 'lib/flydata/fluent-plugins/in_mysql_binlog_flydata.rb', line 48 def initialize super install_custom_signal_handler end |
Instance Method Details
#configure(conf) ⇒ Object
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# File 'lib/flydata/fluent-plugins/in_mysql_binlog_flydata.rb', line 78 def configure(conf) super @binlog_position_file = Mysql::BinLogPositionFile.new(@position_file) unless @binlog_position_file.exists? raise "No position file(#{@position_file}). Initial synchronization is required before starting." end @sync_fm = Flydata::SyncFileManager.new(nil) # Passing nil for data_entry as this class does not use methods which require data_entry @sent_position_file_path = @sync_fm.sent_binlog_path(@position_file) load_custom_conf # SSL configuration unless @ssl_ca_content.to_s.strip.empty? @ssl_ca_path = @sync_fm.ssl_ca_path(@position_file) @sync_fm.save_ssl_ca(FlydataCore::Fluent::ConfigHelper.unescape_conf(@ssl_ca_content), @ssl_ca_path) end # Db access opts @db_opts = { host: @host, port: @port, username: @username, password: @password, database: @database, ssl_ca: @ssl_ca_path, ssl_cipher: @ssl_cipher } $log.info "mysql host:\"#{@host}\" port:\"#{@port}\" username:\"#{@username}\" database:\"#{@database}\" tables:\"#{@tables}\" tables_append_only:\"#{tables_append_only}\"" $log.info "mysql client version: #{`mysql -V`}" server_msg = `echo 'select version();' | #{FlydataCore::Mysql::CommandGenerator.generate_mysql_cmd(@db_opts)} 2>&1` if ($?.exitstatus == 0) $log.info "mysql server version: #{server_msg.strip}" else err_msg = "Failed to access mysql server... #{server_msg.strip}" $log.error err_msg $stderr.puts err_msg #exit 1 # causes retry loop end @tables = @tables.split(/,\s*/) @omit_events = Hash.new @tables_append_only.split(/,\s*/).each do |table| @tables << table unless @tables.include?(table) @omit_events[table] = [:delete, :truncate_table] end # Remove tables that do not have pos files new_tables = @sync_fm.get_new_table_list(@tables, "pos") @tables -= new_tables $log.info "Not watching these tables: #{new_tables.join(", ")}" = Flydata::Mysql::TableMeta.new(@db_opts.merge(tables: @tables)) table_revs = tables.inject({}) do |h, table_name| h[table_name] = @sync_fm.table_rev(table_name) h end # Set context @context = Mysql::Context.new( database: @database, tables: @tables, tag: @tag, sync_fm: @sync_fm, omit_events: @omit_events, table_meta: , table_revs: table_revs, ) @record_dispatcher = Mysql::FlydataBinlogRecordDispatcher.new(@context) @idle_event_detector = IdleEventDetector.new(@initial_idle_interval, @continuous_idle_interval, @check_interval, @idle_timeout) @lock_file = Flydata::FLYDATA_LOCK end |
#event_listener(event) ⇒ Object
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# File 'lib/flydata/fluent-plugins/in_mysql_binlog_flydata.rb', line 269 def event_listener(event) @idle_event_detector.notify @record_dispatcher.dispatch(event) rescue Exception => e position = @binlog_position_file.read $log.error "error occured while processing #{event.event_type} event at #{position}\n#{e.}\n#{$!.backtrace.join("\n")}" raise end |
#install_custom_signal_handler ⇒ Object
Hack: All that has been added here is ‘Fluent::Engine.shutdown_source`. This should be in fluentd’s supervisor#install_main_process_signal_handlers
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# File 'lib/flydata/fluent-plugins/in_mysql_binlog_flydata.rb', line 306 def install_custom_signal_handler trap :USR1 do $log.debug "fluentd main process get SIGUSR1" $log.info "force flushing buffered events" #@log.reopen! # Creating new thread due to mutex can't lock # in main thread during trap context Thread.new { begin Fluent::Engine.shutdown_source Fluent::Engine.flush! $log.debug "flushing thread: flushed" rescue Exception => e $log.warn "flushing thread error: #{e}" end }.run end end |
#run ⇒ Object
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# File 'lib/flydata/fluent-plugins/in_mysql_binlog_flydata.rb', line 183 def run return if instance_variable_defined? :@abort @context..update Flydata::Mysql::TableDdl.migrate_tables(@context.tables, @db_opts, @context.sync_fm, @position_file, @context) do |event| @record_dispatcher.dispatch(event) end current_ssl_cipher = @ssl_cipher retried = false transaction_broken = false File.open(@lock_file, "w") {|f| f.write(Process.pid)} begin begin start_kodama(mysql_url) do |c| c.binlog_position_file = @position_file if @ssl_ca_path.to_s != '' && c.respond_to?(:ssl_ca=) $log.info "SSL is enabled. (ssl_ca: #{@ssl_ca_path})" c.ssl_ca = @ssl_ca_path unless current_ssl_cipher.to_s.empty? $log.info "SSL cipher is set. (ssl_cipher: #{current_ssl_cipher})" c.ssl_cipher = current_ssl_cipher end end if c.respond_to?(:sent_binlog_position_file=) $log.info "Sent position feature is enabled. sent_position_file:#{@sent_position_file_path}" c.sent_binlog_position_file = @sent_position_file_path end $log.info("Binlog position - resume_pos:'#{IO.read(@position_file) rescue IOError}' " + "sent_pos:'#{IO.read(@sent_position_file_path) rescue IOError}'") c.connection_retry_limit = @retry_limit c.connection_retry_wait = @retry_wait c.log_level = @log_level.to_sym @listen_events.each do |event_type| $log.trace { "registered binlog event listener '#{event_type}'" } c.send("on_#{event_type}", &method(:event_listener)) end end rescue Kodama::TransactionError $log.debug "TransactionError" transaction_broken = true raise end rescue Binlog::Error => e if /dh key too small/.match(e.to_s) && !retried && !@secondary_ssl_cipher.to_s.empty? retried = true current_ssl_cipher = @secondary_ssl_cipher $log.warn("Retry with secondary ssl cipher list due to '#{e}' - secondary_ssl_cipher: '#{@secondary_ssl_cipher}'") retry else raise e end ensure if !transaction_broken && # leave the lock file when a transaction is broken File.exists?(@lock_file) && Process.pid == File.open(@lock_file, "r") {|f| f.read}.to_i File.delete(@lock_file) end end rescue => e # HACK: mysql-replication-listener has a network connection leak bug which doesn't release a connection # to MySQL. Rather than fixing the bug, restarting the fluentd process for now. $log.warn "kodama died with an error. Restart the process after #{@retry_wait} seconds. error: #{e.class.to_s} '#{e.to_s}'\n#{e.backtrace.join("\n")}" sleep @retry_wait Process.kill(:HUP, Process.ppid) # Send SIGHUP to the supervisor to restart fluentd rescue SignalException $log.debug "signal exception. exception: #{$!.class.to_s}, error: #{$!.to_s}" raise rescue Exception $log.error "unexpected fatal error. exception: #{$!.class.to_s}, error: #{$!.to_s}\n#{$!.backtrace.join("\n")}" raise end |
#shutdown ⇒ Object
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# File 'lib/flydata/fluent-plugins/in_mysql_binlog_flydata.rb', line 278 def shutdown return if instance_variable_defined? :@abort @idle_event_detector.stop if @thread and @thread.alive? $log.info "Requesting stop Kodama" @kodama_client.stop_request if wait_till_safe_to_stop $log.info "Killing Kodama client" Thread.kill(@thread) else $log.error "Unable to stop Kodama" end end @sync_fm.close end |
#start ⇒ Object
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# File 'lib/flydata/fluent-plugins/in_mysql_binlog_flydata.rb', line 141 def start if File.exists?(@lock_file) $log.error "Previous process was terminated abnormally. To start, remove the lock file after checking data integrity." @abort = true Process.kill(:TERM, Process.ppid) return end super @idle_event_detector.start do |reason, | case reason when :event_not_coming $log.warn "No binary log event since #{}" when :event_still_not_coming $log.warn "No binary log event since #{}" when :event_arrived_finally $log.info "Binary log event has come at #{}" when :event_idle_timeout $log.error "No binary log event since #{}. Restart the process." Process.kill(:HUP, Process.ppid) end end positions_path = @context.sync_fm.table_positions_dir_path Dir.mkdir positions_path unless File.exists? positions_path rescue Binlog::Error if (/basic_string::_M_replace_aux/ === $!.to_s) # TODO Fix the root cause in mysql-replication-listener $log.error <<EOS a mysql-replication-listener error. This could have been caused by one of the following reasons. - Failed on connect: Your host is blocked because of many connection errors; unblock with 'mysqladmin flush-hosts' EOS else $log.error "unexpected mysql-replication-listener error. exception: #{$!.class.to_s}, error: #{$!.to_s}\n#{$!.backtrace.join("\n")}" end raise rescue Exception $log.error "unexpected fatal error. exception: #{$!.class.to_s}, error: #{$!.to_s}\n#{$!.backtrace.join("\n")}" raise end |
#start_kodama(options, &block) ⇒ Object
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# File 'lib/flydata/fluent-plugins/in_mysql_binlog_flydata.rb', line 262 def start_kodama(, &block) @kodama_client = Kodama::Client.new(Kodama::Client.mysql_url()) @kodama_client.logger = $log block.call(@kodama_client) @kodama_client.start end |
#wait_till_safe_to_stop ⇒ Object
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# File 'lib/flydata/fluent-plugins/in_mysql_binlog_flydata.rb', line 295 def wait_till_safe_to_stop retry_count = 5 1.upto(retry_count) do |i| return true if @kodama_client.safe_to_stop? sleep 3 end false end |