To determine whether a tag exists within Logstash, you can use conditional statements. Here's how you can do that:
if "your_tag" in [tags] {
# Perform actions when the tag "your_tag" exists
}
This statement checks if the tag your_tag exists in the [tags] field of Logstash events. If it is present, the condition evaluates to true, and the corresponding actions are executed.
If you also want to handle scenarios where the tag does not exist, you can use an if/else statement:
if "your_tag" in [tags] {
# Perform actions when the tag "your_tag" exists
} else {
# Perform actions when the tag "your_tag" does not exist
}
This construct allows you to perform different actions based on whether the specified tag exists in Logstash events.
This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.
-
How to Use JSON with Logstash?
If you have JSON-formatted logs that you want to ingest and process with Logstash, follow these steps: Assuming you have logs in the following JSON format: {"status": 200, "ip": "127.0.0.1", "level...
Questions -
How to Check if a Field Exists in Logstash?
If you need to determine whether a field like your_field exists in your Logstash data, you can use conditional statements. The steps to achieve this are below. For numerical types, you can use the ...
Questions -
How to Force Logstash to Reparse a File?
By default, Logstash's file input plugin tracks the parts of a file it has already processed. However, when you want Logstash to reparse a file starting from the beginning, you would need to set th...
Questions
Make your mark
Join the writer's program
Are you a developer and love writing and sharing your knowledge with the world? Join our guest writing program and get paid for writing amazing technical guides. We'll get them to the right readers that will appreciate them.
Write for us
Build on top of Better Stack
Write a script, app or project on top of Better Stack and share it with the world. Make a public repository and share it with us at our email.
community@betterstack.comor submit a pull request and help us build better products for everyone.
See the full list of amazing projects on github