45 lines
2.1 KiB
Text
45 lines
2.1 KiB
Text
[[packetbeat-overview]]
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== Packetbeat overview
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++++
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<titleabbrev>Overview</titleabbrev>
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++++
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Packetbeat is a real-time network packet analyzer that you can use
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with Elasticsearch to provide an _application monitoring and performance
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analytics system_. Packetbeat completes the {libbeat}/index.html[Beats platform]
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by providing visibility between the servers of your network.
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Packetbeat works by capturing the network traffic between your application servers,
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decoding the application layer protocols (HTTP, MySQL, Redis, and so on),
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correlating the requests with the responses, and recording the
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interesting <<exported-fields,fields>> for each transaction.
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Packetbeat can help you easily notice issues with your back-end application, such as bugs
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or performance problems, and it makes troubleshooting them - and therefore
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fixing them - much faster.
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Packetbeat sniffs the traffic between your servers, parses the
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application-level protocols on the fly, and correlates the messages into transactions.
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Currently, Packetbeat supports the following protocols:
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include::shared-protocol-list.asciidoc[]
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Packetbeat can insert the correlated transactions directly into Elasticsearch
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or into a central queue created with Redis and Logstash.
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Packetbeat can run on the same servers as your application processes or
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on its own servers. When running on dedicated servers, Packetbeat can get the
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traffic from the switch's mirror ports or from tapping devices. In such a
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deployment, there is zero overhead on the monitored application. See
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<<configuration-interfaces>> for details.
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After decoding the Layer 7 messages, Packetbeat correlates the requests with
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the responses in what we call _transactions_. For each transaction, Packetbeat
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inserts a JSON document into Elasticsearch. See the <<exported-fields>> section
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for details about which fields are indexed.
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The same Elasticsearch and Kibana instances that are used for analysing the
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network traffic gathered by Packetbeat can be used for analysing the log files
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gathered by Logstash. This way, you can have network traffic and log analysis
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in the same system.
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