v0.12.0

[v0.12.0] - 2020-04-25

Changed

• Support scaling to and from zero, matching misimplemented functionality from
  Horizontal Pod Autoscaler.

v0.11.0

[v0.11.0] - 2020-02-28

Added

• Series of hooks for injecting user logic throughout the execution process.
  • preMetric - Runs before metric gathering, given metric gathering input.
  • postMetric - Runs after metric gathering, given metric gathering input and result.
  • preEvaluate - Runs before evaluation, given evaluation input.
  • postEvaluate - Runs after evaluation, given evaluation input and result.
  • preScale - Runs before scaling decision, given min and max replicas, current replicas, target replicas, and resource being scaled.
  • postScale - Runs before scaling decision, given min and max replicas, current replicas, target replicas, and resource being scaled.
• New downscaleStabilization option, based on the Horizontal Pod Autoscaler downscale stabilization, operates by taking the maximum target replica count over the stabilization window.

Changed

• Metrics from API now returns the entire resource definition as JSON rather than just the resource name.
• Changed JSON generated to be in camelCase rather than snake_case for consistency with the Kubernetes API.
  • Evaluation now uses targetReplicas over target_replicas.
  • ResourceMetric now uses runType over run_type.
  • Scale hook now provided with minReplicas, maxReplicas, currentReplicas and targetReplicas rather than their snakecase equivalents.
• Metric gathering and hooks have access to dryRun field, allowing them to determine if they are called as part of a dry run.
• Standardised input to metric gatherer, evaluator and scaler to take specs rather than lists of parameters, allowing easier serialisation for hooks.
• Endpoint /api/v1/metrics now accepts the optional dry_run parameter for marking metric gathering as in dry run mode.
• ResourceMetrics replaced with a list of Metric and a Resource.
• /api/v1/metrics now simply returns a list of Metrics rather than a ResourceMetrics.

Removed

• ResourceMetrics struct removed as it was redundant.

v0.10.0

[v0.10.0] - 2020-01-22

Added

• Set up API to be versioned, starting with v1.
• Can now manually trigger scaling through the API.
• Added extra run_type flag, api_dry_run, for evaluations through the API in dry_run mode.
• Added apiConfig to hold configuration for the REST API.
• Added extra configuration options within apiConfig.
  • enabled - allows enabling or disabling the API, default enabled (true).
  • useHTTPS - allows enabling or disabling HTTPS for the API, default off (false).
  • certFile - cert file to be used if HTTPS is enabled.
  • keyFile - key file to be used if HTTPS is enabled.

Changed

• The command for shell methods is now an array of arguments, rather than a string.
• The /api/v1/evaluation endpoint now requires POST rather than GET.
• The /api/v1/evaluation endpoint now accepts an optional parameter, dry_run. If dry_run is true the evaluation will be retrieved in a read-only manner, the scaling will not occur. If it is false, or not provided, the evaluation will be retrieved and then used to apply scaling to the target.
• Moved port and host configuration options into the apiConfig settings.

v0.9.0

[v0.9.0] - 2020-01-19

Added

• Support for other entrypoints other than /bin/sh, can specify an entrypoint for the shell command method.
• Add logging library glog to allow logging at levels of severity and verbosity.
• Can specify verbosity level of logs via the logVerbosity configuration option.

Changed

• Can scale ReplicaSets, ReplicationControllers and StatefulSets alongside Deployments.
• ResourceMetrics fields have resourceName and resource rather than deploymentName and deployment. In JSON this means that only the resource name will be exposed via field resource.
• Uses scaling API rather than manually adjusting replica count on resource.
• Matches using match selector rather than incorrectly using resource labels and building a different selector.

v0.8.0

Cut 0.8.0 release (#81)

v0.7.0

Cut 0.7.0 release (#74)

0.6.0

Cut 0.6.0 release (#70)

0.5.0

Cut 0.5.0 release (#67)

0.4.0

Cut 0.4.0 release (#64)

0.3.0

Cut 0.3.0 release (#40)