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 following approach:
filter {
if ([your_field]) {
# Your processing logic when the field exists
...
}
}
When handling non-numerical fields such as Boolean or String, use the following method:
filter {
if ("" in [foo]) {
# Logic for existing field
...
}
}
If you want to execute specific actions when the field is not present, use an if/else construct:
filter {
if [your_field] {
# Your processing logic when the field exists
...
} else {
# Your processing logic when the field does not exist
...
}
}
This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.
-
How to Check if a Tag Exists in Logstash?
To determine whether a tag exists within Logstash, you can use conditional statements. Here's how you can do that: if "yourtag" in [tags] { # Perform actions when the tag "yourtag" exists } This...
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 -
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