Version 0.2.0

[arschles]

This is the second beta release of the KEDA HTTP Addon. Please see the install documentation to get started.

The largest change in this release is that the interceptor and scaler components are now multi-tenant, which means:

• One scaler runs per namespace, and handles all HTTPScaledObjects in that namespace
• One fleet of interceptors runs per namespace and handles all of the applications in that namespace. A fleet is defined as a Deployment of interceptors that are scaled by KEDA itself. The HTTP Addon external scaler tells KEDA how to scale the fleet.

Note: there is work pending in #240 to extend this multi-tenancy to out of the namespace scope and into the cluster-global scope

This is a beta release, we invite you to try it out and file issues if you find any bugs or have an idea for a feature you would like to see.

Changes to HTTPScaledObjects

With this release, interceptors and scalers can scale and serve 1 or more backing applications rather than just one, as was possible in v0.1.0 and before.

To route incoming HTTP requests properly, the interceptors need to be able to map any arbitrary request to a backing application or reject the request if there is no application installed to handle it. You must provide this information in every HTTPScaledObject that you submit.

There is a new spec.host field that you are required to include. This field informs interceptors that all requests for the host you provide should be forwarded to the application you specify in the scaleTargetRef.

targetPendingRequests

There is a second new field called spec.targetPendingRequests. It is optional and unrelated to the above routing functionality.

Please see the v0.2.0 HTTPScaledObject reference documentation for more details on this field.

Other Significant Changes

• Comprehensive debugging endpoints on all three components. See developer.md for more details
• More comprehensive unit and integration tests
• Automatically scaling the interceptor fleet
• Adding the ability to specify the target metric for any application, and for the interceptor fleet

Known Issues

• When you change certain fields on an already existing HTTPScaledObject, the operator may not update the corresponding ScaledObject (httpscaledobjects does not trigger a change in the corresponding scaledobjects. #323). To work around this, please delete and re-create the HTTPScaledObject with the updated fields. This will be fixed in a patch release (e.g. v0.2.1)

Full Changelog

• Fixing kubectl command in walkthrough documentation by @arschles in Fixing kubectl command in walkthrough documentation #205
• Checking for type assertion success by @arschles in Checking for type assertion success #181
• Adding GOOS and GOARCH to the Dockerfiles by @arschles in Adding GOOS and GOARCH to the Dockerfiles #186
• Removing the Makefile by @arschles in Removing the Makefile #194
• Factoring the HTTP Transport out of the forwarder by @arschles in Factoring the HTTP Transport out of the forwarder #184
• Bump github.com/onsi/gomega from 1.13.0 to 1.14.0 by @dependabot in Bump github.com/onsi/gomega from 1.13.0 to 1.14.0 #208
• Bump github.com/labstack/echo/v4 from 4.3.0 to 4.4.0 by @dependabot in Bump github.com/labstack/echo/v4 from 4.3.0 to 4.4.0 #209
• Bump google.golang.org/protobuf from 1.26.0 to 1.27.1 by @dependabot in Bump google.golang.org/protobuf from 1.26.0 to 1.27.1 #207
• adding release process document by @arschles in adding release process document #211
• chore: KEDA was accepted as CNCF Incubation project by @tomkerkhove in chore: KEDA was accepted as CNCF Incubation project #229
• Added targetMetric field in CRD by @ajanth97 in Added targetMetric field in CRD #168
• Bump github.com/onsi/gomega from 1.14.0 to 1.15.0 by @dependabot in Bump github.com/onsi/gomega from 1.14.0 to 1.15.0 #220
• Bump github.com/labstack/echo/v4 from 4.4.0 to 4.5.0 by @dependabot in Bump github.com/labstack/echo/v4 from 4.4.0 to 4.5.0 #215
• Bump github.com/onsi/gomega from 1.15.0 to 1.16.0 by @dependabot in Bump github.com/onsi/gomega from 1.15.0 to 1.16.0 #237
• Multi-tenant interceptor and scaler by @arschles in Multi-tenant interceptor and scaler #206
• Bump github.com/google/uuid from 1.1.2 to 1.3.0 by @dependabot in Bump github.com/google/uuid from 1.1.2 to 1.3.0 #254
• Bump go.uber.org/zap from 1.17.0 to 1.19.0 by @dependabot in Bump go.uber.org/zap from 1.17.0 to 1.19.0 #251
• Documenting the targetPendingRequests field by @arschles in Documenting the targetPendingRequests field #233
• Adding Ajanth as a code owner by @arschles in Adding Ajanth as a code owner #256
• Bump go.uber.org/zap from 1.19.0 to 1.19.1 by @dependabot in Bump go.uber.org/zap from 1.19.0 to 1.19.1 #260
• Specifying target in scaler for specific host by @arschles in Specifying target in scaler for specific host #242
• Bump sigs.k8s.io/controller-runtime from 0.9.2 to 0.10.0 by @dependabot in Bump sigs.k8s.io/controller-runtime from 0.9.2 to 0.10.0 #253
• Removing old conflict from ref doc by @arschles in Removing old conflict from ref doc #261
• Bump k8s.io/client-go from 0.22.1 to 0.22.2 by @dependabot in Bump k8s.io/client-go from 0.22.1 to 0.22.2 #265
• Bump google.golang.org/grpc from 1.38.0 to 1.40.0 by @dependabot in Bump google.golang.org/grpc from 1.38.0 to 1.40.0 #264
• Bump google.golang.org/protobuf from 1.26.0 to 1.27.1 by @dependabot in Bump google.golang.org/protobuf from 1.26.0 to 1.27.1 #252
• Using external push scalers in the generated scaled objects by @arschles in Using external push scalers in the generated scaled objects #255
• Add contribution guide by @arschles in Add contribution guide #267
• Bump sigs.k8s.io/controller-runtime from 0.10.0 to 0.10.1 by @dependabot in Bump sigs.k8s.io/controller-runtime from 0.10.0 to 0.10.1 #268
• Adding configurability to the interceptor's HTTP round tripper by @arschles in Adding configurability to the interceptor's HTTP round tripper #250
• Bump google.golang.org/grpc from 1.40.0 to 1.41.0 by @dependabot in Bump google.golang.org/grpc from 1.40.0 to 1.41.0 #270
• adding devcontainer files by @arschles in adding devcontainer files #232
• Fixing typo in go comment by @arschles in Fixing typo in go comment #288
• Removing ingress option on xkcd chart by @arschles in Removing ingress option on xkcd chart #289
• Removing double sleep in scaler handler test by @arschles in Removing double sleep in scaler handler test #290
• Handling host value of "interceptor" in GetMetricSpec by @ajanth97 in Handling host value of "interceptor" in GetMetricSpec #273
• chore: Provide configuration for automatically closing inactive issues by @tomkerkhove in chore: Provide configuration for automatically closing inactive issues #298
• Consolidating the scaler GetMetricSpec tests into one table-driven test by @arschles in Consolidating the scaler GetMetricSpec tests into one table-driven test #295
• Adding config endpoints on admin servers for scaler, interceptor and operator by @arschles in Adding config endpoints on admin servers for scaler, interceptor and operator #280
• Checking for deployment equality in deployment cache by @arschles in Checking for deployment equality in deployment cache #275
• Adding test for 'interceptor' as host in GetScalerMetrics by @arschles in Adding test for 'interceptor' as host in GetScalerMetrics #294
• Adding a fake controller-runtime Client implementation and improving operator tests by @arschles in Adding a fake controller-runtime Client implementation and improving operator tests #247
• using ServeContext for all production HTTP servers by @arschles in using ServeContext for all production HTTP servers #292
• Refactoring concurrency in scaler's pending HTTP queue fetcher logic by @arschles in Refactoring concurrency in scaler's pending HTTP queue fetcher logic #291
• Follow-up tests for multi-tenant work by @arschles in Follow-up tests for multi-tenant work #279
• swapping watch broadcaster channel behavior by @arschles in swapping watch broadcaster channel behavior #283
• Adding test for interceptor headers and redirection by @arschles in Adding test for interceptor headers and redirection #258
• spelling fix: KNative -> Knative by @zroubalik in spelling fix: KNative -> Knative #303
• Bump github.com/onsi/ginkgo from 1.16.4 to 1.16.5 by @dependabot in Bump github.com/onsi/ginkgo from 1.16.4 to 1.16.5 #299
• Small issues with install.md by @arschles in Small issues with install.md #304
• Adding proper nginx-ingress annotation to the xkcd chart's ingress resource by @arschles in Adding proper nginx-ingress annotation to the xkcd chart's ingress resource #309
• Fixing issue 271 by @ajanth97 in Fixing issue 271 #300
• Fixing links to ghcr by @arschles in Fixing links to ghcr #301
• Bump github.com/onsi/gomega from 1.16.0 to 1.17.0 by @dependabot in Bump github.com/onsi/gomega from 1.16.0 to 1.17.0 #311
• fixing release script for interceptor and scaler by @arschles in fixing release script for interceptor and scaler #314
• Fixing operator startup by @arschles in Fixing operator startup #315
• Correcting install guide for keda by @Ritikaa96 in Correcting install guide for keda #319
• running go mod tidy by @arschles in running go mod tidy #320
• Adding release instructions for artifact hub by @arschles in Adding release instructions for artifact hub #318

New Contributors

• @ajanth97 made their first contribution in Added targetMetric field in CRD #168
• @zroubalik made their first contribution in spelling fix: KNative -> Knative #303
• @Ritikaa96 made their first contribution in Correcting install guide for keda #319

Full Changelog: v0.1.0...v0.2.0

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This discussion was created from the release Version 0.2.0.