KEDA 2.6.0

We are happy to release KEDA 2.6.0 🎉

Here are some highlights:

• Five new Scalers 🎉 🎉
• Important bugfixes and improvements related to caching
• KEDA images are signed using cosign
• We no longer push to Docker Hub as of v2.5 as per our announcement in March 2021

Learn how to deploy KEDA by reading our documentation.

New

• Add ActiveMQ Scaler (#2305)
• Add Azure Application Insights Scaler (2506)
• Add New Datadog Scaler (#2354)
• Add New Relic Scaler (#2387)
• Add PredictKube Scaler (#2418)

Improvements

• General: Delete the cache entry when a ScaledObject is deleted (#2564)
• General: Fail fast on buildScalers when not able to resolve a secret that a deployment is relying on (#2394)
• General: keda-operator Cluster Role: add list and watch access to service accounts (#2406)|(#2410)
• General: Sign KEDA images published on GitHub Container Registry (#2501)|(#2502)|(#2504)
• AWS Scalers: Support temporary AWS credentials using session tokens (#2573)
• AWS SQS Scaler: Allow using simple queue name instead of URL (#2457)
• Azure EventHub Scaler: Don't expose connection string in metricName (#2404)
• Azure Pipelines Scaler: Support poolName or poolID validation (#2370)
• CPU Scaler: AAding e2e test for the cpu scaler (#2441)
• External Scaler: Fix wrong calculation of retry backoff duration (#2416)
• Graphite Scaler: Use the latest datapoint returned, not the earliest (#2365)
• Kafka Scaler: Allow flag topic to be optional, where lag of all topics within the consumer group will be used for scaling (#2409)
• Kafka Scaler: Concurrently query brokers for consumer and producer offsets (#2405)
• Kubernetes Workload Scaler: Ignore terminated pods (#2384)
• PostgreSQL Scaler: Assign PostgreSQL userName to correct attribute (#2432)|(#2433)
• Prometheus Scaler: Support namespaced Prometheus queries (#2575)

Breaking Changes

• No longer push to Docker Hub as of v2.5 as per our announcement in March 2021
  • Learn more about the background on kedacore/governance#16

New Contributors

• @solsson made their first contribution in #2384
• @tomasspi made their first contribution in #2406
• @melisatanrverdi made their first contribution in #2305
• @VerstraeteBert made their first contribution in #2405
• @marcelobartsch made their first contribution in #2387
• @tsndqst made their first contribution in #2432
• @yusank made their first contribution in #2416
• @JatinSanghvi made their first contribution in #2443
• @or-shachar made their first contribution in #2444
• @PaulLiang1 made their first contribution in #2409
• @arapulido made their first contribution in #2354
• @nicolaferraro made their first contribution in #2483
• @whitesource-bolt-for-github made their first contribution in #2514
• @daniel-yavorovich made their first contribution in #2418
• @JacobHenner made their first contribution in #2573
• @markrzasa made their first contribution in #2506

Full Changelog: v2.5.0...v2.6.0

KEDA 2.5.0

We are happy to release KEDA 2.5.0 🎉

Here are some highlights:

• Introducing a new Cassandra scaler
• Introducing a new Elasticsearch scaler
• Introducing a new Graphite scaler
• GCP PubSub Scaler: subscriptionSize is deprecated in favor of mode and value
• Performance improvements
• Lot of improvements in several scalers

Learn how to deploy KEDA by reading our documentation.

New

• Add Cassandra Scaler (#2211)
• Add Elasticsearch Scaler (#2311)
• Add Graphite Scaler (#1628)
• ScaledJob: introduce MultipleScalersCalculation (#2016)
• ScaledJob: introduce RolloutStrategy (#2164)
• Add ScalersCache to reuse scalers unless they need changing (#2187)
• Cache metric names provided by KEDA Metrics Server (#2279)

Improvements

• Artemis Scaler: parse out broker config parameters in case restAPITemplate is given (#2104)
• AWS Cloudwatch Scaler: improve metric exporting logic (#2243)
• AWS Cloudwatch Scaler: return minimum value for the metric when cloudwatch returns empty list (#2345)
• Azure Log Analytics Scaler: add support to provide the metric name(#2106)
• Azure Pipelines Scaler: improve logs (#2297)
• Cron Scaler: improve validation in case start & end input is same (#2032)
• Cron Scaler: improve the cron validation (#2038)
• GCP PubSub Scaler: introduce SubscriptionSize and OldestUnackedMessageAge modes (#2266)
• GCP PubSub Scaler: add GCP identity authentication when using (#2225)
• GCP PubSub Scaler: add possibility to reference a GCP PubSub subscription by full link, including project ID (#2269)
• InfluxDB Scaler: add unsafeSsl parameter (#2157|#2320)
• Metrics API Scaler: add Bearer auth (#2028)
• MongoDB Scaler: add support to get connection data from Trigger Authorization (#2115)
• MSSQL Scaler: add support to get connection data from Trigger Authorization (#2112)
• MySQL Scaler: add support to get connection data from Trigger Authorization (#2113)
• MySQL Scaler: don't expose connection string in metricName (#2171)
• PostgreSQL Scaler: add support to get connection data from Trigger Authorization (#2114)
• Prometheus Scaler: validating values length in Prometheus query response (#2264)
• Prometheus Scaler: omit serverAddress from generated metric name (#2099)
• RabbitMQ Scaler: anonymize the host in case of HTTP failure (#2041)
• RabbitMQ Scaler: escape queueName and vhostName before use them in query string (bug fix) (#2055)
• RabbitMQ Scaler: add custom http timeout (#2086)
• RabbitMQ Scaler: add pageSize (using regex) (#2162|#2319)
• Redis Scaler: upgrade library, add username and Sentinel support (#2181)
• SeleniumGrid Scaler: add unsafeSsl parameter (#2157)
• Stan Scaler: provide support for configuring authentication through TriggerAuthentication (#2167)
• Allow setting MaxConcurrentReconciles for controllers (#2272)
• Cleanup metric names inside scalers (#2260)
• Drop support to ValueMetricType using cpu_memory_scaler (#2218)
• Improve metric name creation to be unique using scaler index inside the scaler (#2161)
• Improve error message if IdleReplicaCount are equal to MinReplicaCount to be the same as the check (#2212)
• TriggerAuthentication/Vault: add support for HashiCorp Vault namespace (Vault Enterprise) (#2085)

Deprecations

• GCP PubSub Scaler: subscriptionSize is deprecated in favor of mode and value (#2266)

Breaking Changes

• None

Other

• Ensure that context.Context values are properly passed down the stack (#2202|#2249)
• Refactor AWS related scalers to reuse the AWS clients instead of creating a new one for every GetMetrics call (#2255)
• Improve context handling in appropriate functionality in which we instantiate scalers (#2267)
• Migrate to Kubebuilder v3 (#2082)
  • API path has been changed: github.com/kedacore/keda/v2/api/v1alpha1 -> github.com/kedacore/keda/v2/apis/keda/v1alpha1
• Use Patch to set FallbackCondition on ScaledObject.Status (#2037)
• Bump Golang to 1.17.3 (#2329)
• Add Makefile mockgen targets (#2090|#2184)
• Add github action to run e2e command "on-demand" (#2241)
• Add execution url in the pr-e2e triggering comment and fix problem related with not starting with (#2306)

New Contributors

• @fbalicchia made their first contribution in #2051
• @chapurlatn made their first contribution in #2085
• @bpinske made their first contribution in #2092
• @mihaitodor made their first contribution in #2137
• @dtsioumas made their first contribution in #2157
• @Deichindianer made their first contribution in #2212
• @jerbob92 made their first contribution in #2181
• @etamarw made their first contribution in #2164
• @jmalvarezf-lmes made their first contribution in #2225
• @fivesheep made their first contribution in #2243
• @sosoftmandruszak made their first contribution in #2264
• @Friedrich42 made their first contribution in #2266
• @endersonmenezes made their first contribution in #2297
• @orphaner made their first contribution in #2311
• @allupaku made their first contribution in #2345

Full Changelog: v2.4.0...v2.5.0

Detailed Overview

• Update Python in dev containers and add .gitattributes by @JorTurFer in #2021
• validation and check in cron scaler for same start and end case by @Ritikaa96 in #2032
• chore: KEDA was accepted as CNCF Incubation project by @tomkerkhove in #2039
• Add Bearer Auth for Metrics API scaler by @JorTurFer in #2028
• Update cron scaler to parse the cron with parser instead of searching for '-' by @JorTurFer in #2038
• adapt test to #381 by @fbalicchia in #2051
• use Patch to set FallbackCondition on ScaledObject.Status by @zroubalik in #2037
• Escape queueName and vhostName in RabbitMQ Scaler before use them in query string (bug fix) by @JorTurFer in #2055
• Anonymize the host in case of HTTP failure (RabbitMQ Scaler) by @JorTurFer in #2041
• Update Makefile to ensure that bash is used instead of sh or another by @JorTurFer in #2061
• Adds explicit the option of setting KEDA_HTTP_DEFAULT_TIMEOUT by @JorTurFer in #2062
• fix typo in isScalableCache by @zroubalik in #2064
• build-tools image: bump Golang to 1.16.7 by @zroubalik in #2067
• bump golangci-lint to 1.42.0 by @zroubalik in #2066
• bump Golang to 1.16.7 by @zroubalik in #2065
• Bump bruc...

KEDA 2.4.0

We are happy to release KEDA 2.4.0 🎉

Here are some highlights:

• Introducing a new Solace PubSub+ Event Broker scaler
• Introducing a new Selenium Grid scaler
• Introducing a new Kubernetes Workload scaler
• Introduce fallback functionality
• Introduce Idle Replica Mode

Learn how to deploy KEDA by reading our documentation.

New

• Add Solace PubSub+ Event Broker scaler (#1945)
• Add Selenium Grid scaler (#1971)
• Add Kubernetes Workload scaler (#2010)
• Introduce fallback functionality (#1872)
• Introduce Idle Replica Mode (#1958)
• ScaledJob - Support pod conditions for pending job count calculation (#1970|#2009)

Improvements

• Optimize Kafka scaler by fetching all topic offsets using a single HTTP request (#1956)
• Adding ability to specify Kafka Broker Version (#1866)
• Support custom metric name in RabbitMQ scaler (#1976)
• Support using regex to select the queues in RabbitMQ scaler (#1957)
• Extend Azure Monitor scaler to support custom metrics (#1883)
• Support non-public cloud environments in the Azure Service Bus scaler (#1907)
• Support non-public cloud environments in the Azure Storage Queue and Azure Storage Blob scalers (#1863)
• Adjusts InfluxDB scaler to support queries that return integers in addition to those that return floats (#1977)
• Allow InfluxDB authToken, serverURL, and organizationName to be sourced from (Cluster)TriggerAuthentication (#1904)
• IBM MQ scaler password handling fix (#1939)
• Metrics APIServer: Add ratelimiting parameters to override client (#1944)
• Fix READY and ACTIVE fields of ScaledJob to show status when we run kubectl get sj (#1855)
• Show HashiCorp Vault Address when using kubectl get ta or kubectl get cta (#1862)
• Don't panic when HashiCorp Vault path doesn't exist (#1864)

Breaking Changes

• Fix keda-system-auth-delegator ClusterRoleBinding name (#1616). Upgrading may leave a stray ClusterRoleBinding with the old name keda:system:auth-delegator behind.

Other

• Use scaled[object/job].keda.sh/ prefix for KEDA related labels (#2008)

KEDA 2.3.0

We are happy to release KEDA 2.3.0 🎉

Here are some highlights:

• Introducing a new Azure Pipelines scaler
• Introducing a new OpenStack Metrics scaler
• New authentication options for Prometheus

Learn how to deploy KEDA by reading our documentation.

New

• Add Azure Pipelines Scaler (#1706)
• Add OpenStack Metrics Scaler (#1382)
• Added basic, tls and bearer authentication support to the Prometheus scaler #1559
• Add header Origin to Apache Artemis scaler #1796

Improvements

• Azure Service Bus Scaler: Namespace from connectionString parameter is added to metricName due to uniqueness violation for clusters having more than one queue with the same name (#1755)
• Remove app.kubernetes.io/version label from label selectors (#1696)
• Apache Kafka Scaler: Add allowIdleConsumers to the list of trigger parameters (#1684)
• Fixed goroutine leaks in usage of timers (#1704 | #1739)
• Setting timeouts in the HTTP client used by the IBM MQ scaler (#1758)
• Fix cleanup of removed triggers (#1768)
• Eventhub Scaler: Add trigger parameter checkpointStrategy to support more language-specific checkpoints (#1621)
• Fix Azure Blob scaler when using multiple triggers with the same blobContainerName and added a optional metricName field (#1816)

Breaking Changes

• None.

KEDA 2.2.0

We are happy to release KEDA 2.2.0 🎉

Here are some highlights:

• Introducing a new Microsoft SQL Server scaler
• KEDA emits Kubernetes Events
• Adding several performance related improvements
• ScaledJob supports metadata labels in Job template
• Improving AWS SQS, Metrics API, OpenStack Swift and RabbitMQ scaler

Learn how to deploy KEDA by reading our documentation.

New

• Emit Kubernetes Events on KEDA events (#1523 | #1647)
• Support Quantities in Metrics API scaler (#1667)
• Add Microsoft SQL Server (MSSQL) scaler (#674 | docs)
• Add publishRate trigger to RabbitMQ scaler (#1653)
• ScaledJob: support metadata labels in Job template (#1686)

Improvements

• Add KEDA_HTTP_DEFAULT_TIMEOUT support in Operator (#1548)
• Removed MIN field for ScaledJob (#1553)
• Add container port for Prometheus on Operator YAML (#1562)
• Fix a memory leak in Kafka client and close push scalers (#1565)
• Add 'Metadata' header to AAD podIdentity request (#1566)
• KEDA should make sure generate correct labels for HPA (#1630)
• Fix memory leak by checking triggers uniqueness properly (#1640)
• Print correct ScaleTarget Kind in Events (#1641)
• Fixed KEDA ClusterRoles to give permissions for ClusterTriggerAuthentications (#1645)
• Make swiftURL parameter optional for the OpenStack Swift scaler (#1652)
• Fix memory leak of keda-metrics-apiserver by setting a controller-runtime logger properly (#1654)
• AWS SQS Scaler: Add Visible + NotVisible messages for scaling considerations (#1664)
• Fixing behavior on ScaledJob with incorrect External Scaler (#1672)

Breaking Changes

• None.

KEDA 2.1.0

We are happy to release KEDA v2.1.0 🎉

Here are some highlights:

• Introduction of ClusterTriggerAuthentication for cluster-wide trigger authentication
• Introducing new InfluxDB, MongoDB & OpenStack Swift scaler
• Improvements to AWS Cloudwatch, Azure Event Hub, Kafka & Redis scalers
• Automatically determine the RabbitMQ protocol (when possible)
• Support for Redis clusters
• Performance improvements

Learn how to deploy KEDA by reading our documentation.

New

• Global authentication credentials can be managed using ClusterTriggerAuthentication objects (#1452)
• Introducing InfluxDB scaler (#1239)
• Introducing OpenStack Swift scaler (#1342)
• Support for Redis clusters in Redis list & Redis streams scalers (#1437)
• Use Pod Identity with Azure Event Hub scaler (#994)
• Automatically determine the RabbitMQ protocol when possible
• Support for setting the RabbitMX protocol via TriggerAuthentication (#1459, #1483)
• Support for multi-dimensional metrics in AWS Cloudwatch Scaler (#1230)
• Show MIN/MAX replica counts when using kubectl get scaledobject/scaledjob (#1534)
• Introducing MongoDB scaler (#1467)

Improvements

• Support add ScaledJob's label to its job (#1311)
• Override the vhost on a RabbitMQ scaler via vhostName in the metadata (#1451)
• Bug fix in aws_iam_authorization to utilize correct secret from env key name (#1332)
• Add metricName field to postgres scaler and auto generate if not defined (#1381)
• Mask password in postgres scaler auto generated metricName (#1381)
• Bug fix for pending jobs in ScaledJob's accurateScalingStrategy (#1323)
• Fix memory leak because of unclosed scalers (#1413)
• Optimize Kafka scaler's getLagForPartition function (#1464)
• Reduce unnecessary /scale requests from ScaledObject controller (#1453)
• Add support for the WATCH_NAMESPACE environment variable to the operator (#1474)
• Improve performance when fetching pod information (#1457)
• Improve performance when fetching current scaling information on Deployments (#1458)
• Improve error reporting in prometheus scaler (#1497)
• Check that metricNames are unique in ScaledObject (#1390)
• Serve OpenAPI spec from KEDA Metrics Apiserver (#1512)
• Fix unnecessary HPA updates when Resource based Trigger is used (#1541)

Breaking Changes

None.

Other

• Bump go module version to v2 (#1324)

KEDA 2.0.0

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

KEDA 2.0.0-rc2

We're happy to release KEDA 2.0.0 release candidate 2 (RC2) which is an incremental release to v2.0.0-rc. 🎉

Our goal is to release KEDA 2.0.0 stable in a couple of weeks.

What's new?

New

• New IBM MQ Scaler (#1259)
• Adding Scaling Strategy for ScaledJob (#1227)
• Adding support for cpu/memory scaler (#1215)

Improvements

• ScaledJobs: Introduce new scaling logic with fix orphan pod issue (#1214)
• enabling authentication for metric api scaler (#1137)
• Update dependencies
• Avoid exception when CRD doesn't follow Pod spec shape (#1195)
• Improved code linting

Breaking Changes

• Remove Kafka scaler requirement for CA/cert/key (#1288)
• Kubernetes v1.16+ is required instead of v1.13
• Use apiextensions.k8s.io/v1 instead of apiextensions.k8s.io/v1beta1

KEDA 2.0.0-rc

We're happy to release KEDA 2.0.0 release candidate (RC) which is an incremental release to v2.0.0-beta. 🎉

Our goal is to release KEDA 2.0.0 stable in mid-October.

We'll provide a full changelog later today after everything is released.

What's new?

New

• Support for Pod Identity for Log Analytics scaler

Improvements

• 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
• Upgrade to operator-sdk v1.0.1
• Improved code linting

Breaking Changes

• Kubernetes v1.16+ is required instead of v1.13
• Use apiextensions.k8s.io/v1 instead of apiextensions.k8s.io/v1beta1

Other

None.

KEDA 2.0.0-beta

New

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

Improvements

• 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

• Change apiGroup from keda.k8s.io to keda.sh (#552)
• Introduce a separate ScaledObject and ScaledJob(#653)
• Remove New() and Close() from the interface of service ExternalScaler in externalscaler.proto.
• Removed deprecated brokerList for Kafka scaler (#882)
• All scalers metadata that is resolved from the scaleTarget environment have suffix FromEnv added. e.g: connection -> connectionFromEnv
• Kafka: split metadata and config for SASL and TLS (#1074)
• Service Bus: queueLength is now called messageCount (#1109)
• Use host instead of apiHost in rabbitmq scaler. Add protocol in trigger spec to specify which protocol should be used (#1115)

Other

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