What is the purpose of Logstash?
Logstash is a light-weight, open-source, server-side data processing pipeline that allows you to collect data from a variety of sources, transform it on the fly, and send it to your desired destination. It is most often used as a data pipeline for Elasticsearch, an open-source analytics and search engine.
What are the elements in Logstash?
A Logstash pipeline has two required elements, input and output , and one optional element, filter . The input plugins consume data from a source, the filter plugins modify the data as you specify, and the output plugins write the data to a destination.
What is Logstash and how does it work?
Logstash is a plugin-based data collection and processing engine. Once the data has been processed, the processing threads send the data to the appropriate output plugins, which are responsible for formatting and sending data onwards, e.g. to Elasticsearch.
What are Logstash plugins?
Logstash Output Plugins
- Redis. The Redis plugin is used to output events to Redis using an RPUSH, Redis is a key-value data store that can serve as a buffer layer in your data pipeline.
- Kafka. Kafka is a distributed publish-subscribe messaging system that is designed to be fast, scalable, and durable.
- Stdout.
What is a Logstash agent?
Logstash is a free and open server-side data processing pipeline that ingests data from a multitude of sources, transforms it, and then sends it to your favorite “stash.” Learn how to parse and ingest CSV files into Elasticsearch with Logstash.
What is Logstash forwarder?
logstash-forwarder will ship log events over the network directly to a Logstash instance, typically on another server. Unless you explicitly configure Logstash to stream those logs on an on-disk file they will never be stored on disk.
What is type in Logstash?
The type option sets the value of the field with the same name. If you only ingest a single kind of log (and never will do anything else) you don’t have to worry about it, but in all likelihood you’ll eventually want to process different kinds of logs and then the type field will be a good way of distinguishing them.
What is pipeline in Logstash?
Logstash is an open source data processing pipeline that ingests events from one or more inputs, transforms them, and then sends each event to one or more outputs. Some Logstash implementations may have many lines of code and may process events from multiple input sources.
What is Logstash shipper?
Logstash is one of many data frontends that can deliver data in Elasticsearch-friendly way – consequently, Logstash’s indexer indexes the data (extracting fields, deciding what index to store the data in, etc.), and its Shipper ships the data to Elasticsearch… – zwer.
Where is Logstash installed?
Default location /usr/share/logstash. bin: Binary scripts including logstash to start Logstash and logstash-plugin to install plugins. Default location /usr/share/logstash/bin. settings: Configuration files, including logstash.
What is Logstash codec?
A codec plugin changes the data representation of an event. Codecs are essentially stream filters that can operate as part of an input or output. Takes CSV data, parses it, and passes it along.
What is field in Logstash?
The logstash agent is a processing pipeline with 3 stages: inputs → filters → outputs. Inputs generate events, filters modify them, outputs ship them elsewhere. All events have properties. Logstash calls these properties “fields.”