Today, we are happy to announce another milestone - KEDA 2.0 is now generally available and ready to scale all your workloads! 🎊

Learn more about this release in our blog post and easily get started.

What's new?

New

• Introduce Azure Log Analytics scaler (#1061) | docs)
• Introduce External Push scaler (#820 | docs)
• Introduce Metrics API Scaler (#1026 | docs)
• Introduce IBM MQ Scaler (#1259 | docs)
• Introduce CPU scaler (#1215 | docs)
• Introduce Memory scaler (#1215 | docs)
• Introduce scaling any CustomResource that implements Scale subresource (#703)
• Provide KEDA go-client (#494)
• Provide KEDA readiness and liveness probes (#788)
• Support for configuring scaling behavior in HPA v2beta2 (#802)
• Provide Standard Resource metrics to KEDA (#874)
• Provide support for Managed Identity support for Azure Monitor scaler (#936)
• Provide support for multiple triggers on ScaledObject (#476)
• Provide consumer offset reset policy option to Kafka scaler (#925)
• Provide option to restore to original replica count after ScaledObject's deletion (#219)
• Support for multiple redis list types in redis list scaler (#1006 | docs)
• Introduce Prometheus metrics for KEDA Metrics API Server (#823 | docs)
• Introduce Scaling Strategy for ScaledJob (#1227)

Improvements

• ScaledJobs: Introduce new scaling logic with fix orphan pod issue (#1214)
• enabling authentication for metric api scaler (#1137)
• Avoid exception when CRD doesn't follow Pod spec shape (#1195)
• Fix for not sending trigger metadata to the External Scaler
• Fix for up-down scaling behavior configuration is ignored in Kubernetes version >= 18.0
• Fix for RabbitMQ queue name causing problems in HPA external metric
• Update version.go properly during make release
• Improved code linting
• Move from autoscaling v2beta1 to v2beta2 for HPA (#721)
• Introduce shortnames for CRDs (#774)
• Improve kubectl get scaledobject to show related trigger authentication (#777)
• Improve kubectl get triggerauthentication to show information about configured parameters (#778)
• Added ScaledObject Status Conditions to display status of scaling (#750)
• Added optional authentication parameters for the Redis Scaler (#962)
• Improved GCP PubSub Scaler performance by closing the client correctly (#1087)

Breaking Changes

We are making some breaking changes, but you can easily migrate with our migration guide.

• Introduce a separate ScaledObject and ScaledJob(#653)
• Change apiGroup from keda.k8s.io to keda.sh (#552)
• Use apiextensions.k8s.io/v1 instead of apiextensions.k8s.io/v1beta1
• Kubernetes v1.16+ is required instead of v1.13
• All scalers metadata that is resolved from the scaleTarget environment have suffix FromEnv added. e.g: connection -> connectionFromEnv
• Remove New() and Close() from the interface of service ExternalScaler in externalscaler.proto.

Changes in our scalers:

• Kafka:
  • Split metadata and config for SASL and TLS (#1074)
  • Remove Kafka scaler requirement for CA/cert/key (#1288)
  • Removed deprecated brokerList for Kafka scaler (#882)
• Service Bus:
  • queueLength is now called messageCount (#1109)
• RabbitMQ:
  • Use host instead of apiHost in rabbitmq scaler. Add protocol in trigger spec to specify which protocol should be used (#1115)

Other

• Change Metrics Server image name from keda-metrics-adapter to keda-metrics-apiserver (#1105)
• Update Operator SDK and k8s deps (#1007,#870)
• Improved code linting
• Update dependencies