Next Release Preview

Please make a pull request to describe any changes you wish to highlight in the next release of Spinnaker. These notes will be prepended to the release changelog.

Coming Soon in Release 2025.4.0

Spring Boot 3.0.13 Upgrade

As part of the upgrade to Spring Boot 3.0.13, actuator metrics export configuration properties have changed structure.

Actuator Metrics Export Property Changes

The metrics export properties have moved from the old schema to the new format:

Example

Prometheus configuration keys have changed from:

management.metrics.export.prometheus.*

to

management.prometheus.metrics.export.*

Session data cleanup

Spring Boot 3.0 considers session data cached by Spring Boot 2.7 invalid. Therefore, users with cached sessions will be unable to log in until the invalid information is removed from the cache. Open browser windows to Spinnaker are unresponsive after the deployment until they’re reloaded. Executing:

$ redis-cli keys "spring:session*" | xargs redis-cli del

on Gate’s redis instance removes the cached session information.

YAML Parsing Limits Configuration

Context: Starting with SnakeYAML 1.33, strict safety limits are enforced by default:

• maxAliasesForCollections = 50
• codePointLimit = 3145728

These limits can cause large or alias-heavy YAML files (such as Kubernetes manifests) to fail during parsing, potentially breaking Spinnaker deployments.

Improvement: To address this, Spinnaker now exposes two configurable properties that allow operators to override these limits when needed:

snakeyaml.max-aliases-for-collections: <int>   # default: 50
snakeyaml.code-point-limit: <int>              # default: 3145728

Impact:

• Prevents deployment failures due to strict YAML parsing limits.
• Provides flexibility for environments using complex or deeply aliased YAML manifests.
• Defaults remain aligned with SnakeYAML 1.33’s secure settings.

Example: To increase limits for large manifests:

snakeyaml:
  max-aliases-for-collections: 500
  code-point-limit: 10485760

reference links: https://www.javadoc.io/doc/org.yaml/snakeyaml/1.33/org/yaml/snakeyaml/LoaderOptions.html https://github.com/spinnaker/spinnaker/blob/main/kork/kork-core/src/main/java/com/netflix/spinnaker/kork/yaml/YamlHelper.java