Cloud Platform

Tagging

Tags are labels that you can attach to instances, volumes, instance templates, and volume templates to organize and filter your resources. Don't confuse them with image tags which serve a different purpose.

Tag format

Tags can be up to 256 characters long and may contain alphanumeric characters plus -, +, _, ., :, and =. Each resource (instance, volume, instance template, volume template) can have up to 16 tags.

Adding tags

Add tags to a resource at creation time:

unikraft instance create \
  --metro fra \
  --image ... \
  --memory ... \
  --tag production \
  --tag customer_A

Add tags to an existing resource ("op": "set" will replace all existing tags):

unikraft instance edit <instance-name> \
  --tag testsystem \
  --tag customer_B

Add tags to a resource without replacing existing ones ("op": "add"):

unikraft instance edit <instance-name> --add tags=legacy

Tags are automatically deduplicated. Adding a tag already attached to a resource has no effect.

Removing tags

Remove specific tags from a resource ("op": "del"):

unikraft instance edit <instance-name> --del tags=legacy

Filtering by tag

Filter the instance list, volume list, instance template list, or volume template list by one or more tags. Only resources that have all the specified tags appear in the results.

unikraft instance list --filter 'tags==production,customer_A'

When filtering, separate tags by commas (,). Elsewhere, pass one tag per --tag flag—the CLI no longer splits a flag value on commas.

Learn more

Unikraft Cloud's REST API reference.

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Last modified on October 5, 2026

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