Module: LogStash::Outputs::ElasticSearch::Common
- Included in:
- LogStash::Outputs::ElasticSearch
- Defined in:
- lib/logstash/outputs/elasticsearch/common.rb
Constant Summary collapse
- DOC_DLQ_CODES =
These codes apply to documents, not at the request level
[400, 404]
- DOC_SUCCESS_CODES =
[200, 201]
- DOC_CONFLICT_CODE =
409
- VERSION_TYPES_PERMITTING_CONFLICT =
When you use external versioning, you are communicating that you want to ignore conflicts. More obviously, since an external version is a constant part of the incoming document, we should not retry, as retrying will never succeed.
["external", "external_gt", "external_gte"]
- VALID_HTTP_ACTIONS =
To be overidden by the -java version
["index", "delete", "create", "update"]
- DEFAULT_EVENT_TYPE_ES6 =
Determine the correct value for the ‘type’ field for the given event
"doc".freeze
- DEFAULT_EVENT_TYPE_ES7 =
"_doc".freeze
Instance Attribute Summary collapse
-
#client ⇒ Object
readonly
Returns the value of attribute client.
-
#hosts ⇒ Object
readonly
Returns the value of attribute hosts.
Instance Method Summary collapse
- #check_action_validity ⇒ Object
- #dlq_enabled? ⇒ Boolean
-
#event_action_tuple(event) ⇒ Object
Convert the event into a 3-tuple of action, params, and event.
- #get_event_type(event) ⇒ Object
- #install_template ⇒ Object
- #maximum_seen_major_version ⇒ Object
-
#multi_receive(events) ⇒ Object
Receive an array of events and immediately attempt to index them (no buffering).
- #next_sleep_interval(current_interval) ⇒ Object
- #register ⇒ Object
- #retrying_submit(actions) ⇒ Object
-
#safe_bulk(actions) ⇒ Object
Rescue retryable errors during bulk submission.
- #setup_hosts ⇒ Object
- #sleep_for_interval(sleep_interval) ⇒ Object
- #submit(actions) ⇒ Object
- #valid_actions ⇒ Object
Instance Attribute Details
#client ⇒ Object (readonly)
Returns the value of attribute client.
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# File 'lib/logstash/outputs/elasticsearch/common.rb', line 5 def client @client end |
#hosts ⇒ Object (readonly)
Returns the value of attribute hosts.
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# File 'lib/logstash/outputs/elasticsearch/common.rb', line 5 def hosts @hosts end |
Instance Method Details
#check_action_validity ⇒ Object
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# File 'lib/logstash/outputs/elasticsearch/common.rb', line 99 def check_action_validity raise LogStash::ConfigurationError, "No action specified!" unless @action # If we're using string interpolation, we're good! return if @action =~ /%{.+}/ return if valid_actions.include?(@action) raise LogStash::ConfigurationError, "Action '#{@action}' is invalid! Pick one of #{valid_actions} or use a sprintf style statement" end |
#dlq_enabled? ⇒ Boolean
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# File 'lib/logstash/outputs/elasticsearch/common.rb', line 308 def dlq_enabled? # TODO there should be a better way to query if DLQ is enabled # See more in: https://github.com/elastic/logstash/issues/8064 respond_to?(:execution_context) && execution_context.respond_to?(:dlq_writer) && !execution_context.dlq_writer.inner_writer.is_a?(::LogStash::Util::DummyDeadLetterQueueWriter) end |
#event_action_tuple(event) ⇒ Object
Convert the event into a 3-tuple of action, params, and event
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# File 'lib/logstash/outputs/elasticsearch/common.rb', line 40 def event_action_tuple(event) action = event.sprintf(@action) params = { :_id => @document_id ? event.sprintf(@document_id) : nil, :_index => event.sprintf(@index), :_type => get_event_type(event), :_routing => @routing ? event.sprintf(@routing) : nil } if @pipeline params[:pipeline] = event.sprintf(@pipeline) end if @parent if @join_field join_value = event.get(@join_field) parent_value = event.sprintf(@parent) event.set(@join_field, { "name" => join_value, "parent" => parent_value }) params[:_routing] = event.sprintf(@parent) else params[:parent] = event.sprintf(@parent) end end if action == 'update' params[:_upsert] = LogStash::Json.load(event.sprintf(@upsert)) if @upsert != "" params[:_script] = event.sprintf(@script) if @script != "" params[:_retry_on_conflict] = @retry_on_conflict end if @version params[:version] = event.sprintf(@version) end if @version_type params[:version_type] = event.sprintf(@version_type) end [action, params, event] end |
#get_event_type(event) ⇒ Object
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# File 'lib/logstash/outputs/elasticsearch/common.rb', line 217 def get_event_type(event) # Set the 'type' value for the index. type = if @document_type event.sprintf(@document_type) else if client.maximum_seen_major_version < 6 event.get("type") || DEFAULT_EVENT_TYPE_ES6 elsif client.maximum_seen_major_version == 6 DEFAULT_EVENT_TYPE_ES6 else DEFAULT_EVENT_TYPE_ES7 end end if !(type.is_a?(String) || type.is_a?(Numeric)) @logger.warn("Bad event type! Non-string/integer type value set!", :type_class => type.class, :type_value => type.to_s, :event => event) end type.to_s end |
#install_template ⇒ Object
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# File 'lib/logstash/outputs/elasticsearch/common.rb', line 95 def install_template TemplateManager.install_template(self) end |
#maximum_seen_major_version ⇒ Object
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# File 'lib/logstash/outputs/elasticsearch/common.rb', line 91 def maximum_seen_major_version client.maximum_seen_major_version end |
#multi_receive(events) ⇒ Object
Receive an array of events and immediately attempt to index them (no buffering)
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# File 'lib/logstash/outputs/elasticsearch/common.rb', line 35 def multi_receive(events) (events.map {|e| event_action_tuple(e)}) end |
#next_sleep_interval(current_interval) ⇒ Object
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# File 'lib/logstash/outputs/elasticsearch/common.rb', line 151 def next_sleep_interval(current_interval) doubled = current_interval * 2 doubled > @retry_max_interval ? @retry_max_interval : doubled end |
#register ⇒ Object
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# File 'lib/logstash/outputs/elasticsearch/common.rb', line 18 def register @stopping = Concurrent::AtomicBoolean.new(false) # To support BWC, we check if DLQ exists in core (< 5.4). If it doesn't, we use nil to resort to previous behavior. @dlq_writer = dlq_enabled? ? execution_context.dlq_writer : nil setup_hosts # properly sets @hosts build_client install_template check_action_validity @bulk_request_metrics = metric.namespace(:bulk_requests) @document_level_metrics = metric.namespace(:documents) @logger.info("New Elasticsearch output", :class => self.class.name, :hosts => @hosts.map(&:sanitized).map(&:to_s)) end |
#retrying_submit(actions) ⇒ Object
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# File 'lib/logstash/outputs/elasticsearch/common.rb', line 115 def (actions) # Initially we submit the full list of actions submit_actions = actions sleep_interval = @retry_initial_interval while submit_actions && submit_actions.length > 0 # We retry with whatever is didn't succeed begin submit_actions = submit(submit_actions) if submit_actions && submit_actions.size > 0 @logger.info("Retrying individual bulk actions that failed or were rejected by the previous bulk request.", :count => submit_actions.size) end rescue => e @logger.error("Encountered an unexpected error submitting a bulk request! Will retry.", :error_message => e., :class => e.class.name, :backtrace => e.backtrace) end # Everything was a success! break if !submit_actions || submit_actions.empty? # If we're retrying the action sleep for the recommended interval # Double the interval for the next time through to achieve exponential backoff Stud.stoppable_sleep(sleep_interval) { @stopping.true? } sleep_interval = next_sleep_interval(sleep_interval) end end |
#safe_bulk(actions) ⇒ Object
Rescue retryable errors during bulk submission
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# File 'lib/logstash/outputs/elasticsearch/common.rb', line 239 def safe_bulk(actions) sleep_interval = @retry_initial_interval begin es_actions = actions.map {|action_type, params, event| [action_type, params, event.to_hash]} response = @client.bulk(es_actions) response rescue ::LogStash::Outputs::ElasticSearch::HttpClient::Pool::HostUnreachableError => e # If we can't even connect to the server let's just print out the URL (:hosts is actually a URL) # and let the user sort it out from there @logger.error( "Attempted to send a bulk request to elasticsearch'"+ " but Elasticsearch appears to be unreachable or down!", :error_message => e., :class => e.class.name, :will_retry_in_seconds => sleep_interval ) @logger.debug("Failed actions for last bad bulk request!", :actions => actions) # We retry until there are no errors! Errors should all go to the retry queue sleep_interval = sleep_for_interval(sleep_interval) @bulk_request_metrics.increment(:failures) retry unless @stopping.true? rescue ::LogStash::Outputs::ElasticSearch::HttpClient::Pool::NoConnectionAvailableError => e @logger.error( "Attempted to send a bulk request to elasticsearch, but no there are no living connections in the connection pool. Perhaps Elasticsearch is unreachable or down?", :error_message => e., :class => e.class.name, :will_retry_in_seconds => sleep_interval ) Stud.stoppable_sleep(sleep_interval) { @stopping.true? } sleep_interval = next_sleep_interval(sleep_interval) @bulk_request_metrics.increment(:failures) retry unless @stopping.true? rescue ::LogStash::Outputs::ElasticSearch::HttpClient::Pool::BadResponseCodeError => e @bulk_request_metrics.increment(:failures) log_hash = {:code => e.response_code, :url => e.url.sanitized.to_s} log_hash[:body] = e.response_body if @logger.debug? # Generally this is too verbose = "Encountered a retryable error. Will Retry with exponential backoff " # We treat 429s as a special case because these really aren't errors, but # rather just ES telling us to back off a bit, which we do. # The other retryable code is 503, which are true errors # Even though we retry the user should be made aware of these if e.response_code == 429 logger.debug(, log_hash) else logger.error(, log_hash) end sleep_interval = sleep_for_interval(sleep_interval) retry rescue => e # Stuff that should never happen # For all other errors print out full connection issues @logger.error( "An unknown error occurred sending a bulk request to Elasticsearch. We will retry indefinitely", :error_message => e., :error_class => e.class.name, :backtrace => e.backtrace ) @logger.debug("Failed actions for last bad bulk request!", :actions => actions) sleep_interval = sleep_for_interval(sleep_interval) @bulk_request_metrics.increment(:failures) retry unless @stopping.true? end end |
#setup_hosts ⇒ Object
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# File 'lib/logstash/outputs/elasticsearch/common.rb', line 83 def setup_hosts @hosts = Array(@hosts) if @hosts.empty? @logger.info("No 'host' set in elasticsearch output. Defaulting to localhost") @hosts.replace(["localhost"]) end end |
#sleep_for_interval(sleep_interval) ⇒ Object
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# File 'lib/logstash/outputs/elasticsearch/common.rb', line 146 def sleep_for_interval(sleep_interval) Stud.stoppable_sleep(sleep_interval) { @stopping.true? } next_sleep_interval(sleep_interval) end |
#submit(actions) ⇒ Object
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# File 'lib/logstash/outputs/elasticsearch/common.rb', line 156 def submit(actions) bulk_response = safe_bulk(actions) # If the response is nil that means we were in a retry loop # and aborted since we're shutting down return if bulk_response.nil? # If it did return and there are no errors we're good as well if bulk_response["errors"] @bulk_request_metrics.increment(:with_errors) else @bulk_request_metrics.increment(:successes) @document_level_metrics.increment(:successes, actions.size) return end actions_to_retry = [] bulk_response["items"].each_with_index do |response,idx| action_type, action_props = response.first status = action_props["status"] failure = action_props["error"] action = actions[idx] action_params = action[1] # Retry logic: If it is success, we move on. If it is a failure, we have 3 paths: # - For 409, we log and drop. there is nothing we can do # - For a mapping error, we send to dead letter queue for a human to intervene at a later point. # - For everything else there's mastercard. Yep, and we retry indefinitely. This should fix #572 and other transient network issues if DOC_SUCCESS_CODES.include?(status) @document_level_metrics.increment(:successes) next elsif DOC_CONFLICT_CODE == status @document_level_metrics.increment(:non_retryable_failures) @logger.warn "Failed action.", status: status, action: action, response: response if !failure_type_logging_whitelist.include?(failure["type"]) next elsif DOC_DLQ_CODES.include?(status) action_event = action[2] # To support bwc, we check if DLQ exists. otherwise we log and drop event (previous behavior) if @dlq_writer # TODO: Change this to send a map with { :status => status, :action => action } in the future @dlq_writer.write(action_event, "Could not index event to Elasticsearch. status: #{status}, action: #{action}, response: #{response}") else @logger.warn "Could not index event to Elasticsearch.", status: status, action: action, response: response end @document_level_metrics.increment(:non_retryable_failures) next else # only log what the user whitelisted @document_level_metrics.increment(:retryable_failures) @logger.info "retrying failed action with response code: #{status} (#{failure})" if !failure_type_logging_whitelist.include?(failure["type"]) actions_to_retry << action end end actions_to_retry end |
#valid_actions ⇒ Object
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# File 'lib/logstash/outputs/elasticsearch/common.rb', line 111 def valid_actions VALID_HTTP_ACTIONS end |