truncate_all

Learn about the truncate_all OTTL editor function.

  less than a minute  

This function is used to truncate all string values within a specified map so that none exceed a given character limit. This function helps manage value length in telemetry data to ensure consistency and compliance with size constraints.

Syntax: truncate_all(target, limit)

  • Target: A path expression pointing to map type field whose string values need to be truncated.
  • Limit: An integer representing the maximum number of characters allowed for each string value. Non-string values within the map are unaffected.

Input

{
	"_type": "log",
	"attributes": {
		"manifest": "{\"apiVersion\":\"apps/v1\",\"kind\":\"Deployment\",\"metadata\":{\"name\":\"nginx-deployment\",\"labels\":{\"app\":\"nginx\"}},\"spec\":{\"replicas\":3,\"selector\":{\"matchLabels\":{\"app\":\"nginx\"}},\"template\":{\"metadata\":{\"labels\":{\"app\":\"nginx\"}},\"spec\":{\"containers\":[{\"name\":\"nginx\",\"image\":\"nginx:1.14.2\",\"ports\":[{\"containerPort\":80}]}]}}}"
	},
	"body": "Deployment issue",
	"resource": {...},
	"timestamp": 1733439976983
}

Statement

truncate_all(attributes, 80)

Output

{
	"_type": "log",
	"attributes": {
		"manifest": "{\"apiVersion\":\"apps/v1\",\"kind\":\"Deployment\",\"metadata\":{\"name\":\"nginx-deployment"
	},
	"body": "Deployment issue",
	"resource": {...},
	"timestamp": 1733440045272
}

The string value within attributes, which exceeds 30 characters, is truncated to exactly 80 characters.