The attribute "queueLength" of RabbitMQ Scaler is not optional actually

[heavenwing]

Expected Behavior

Don't need to set queueLength

Actual Behavior

I must to set queueLength, otherwise RabbitMQ Scaler is not working

Steps to Reproduce the Problem

1. deploy rabbitmq into k8s:

helm repo add bitnami https://charts.bitnami.com/bitnami
helm install rabbitmq --set rabbitmq.password=PASSWORD,service.type=LoadBalancer bitnami/rabbitmq

2.generate deploy yaml file with this command:

func kubernetes deploy --name azfunconk8s --image-name heavenwing/azfunconk8s --dry-run > deploy-funcs.yaml

This command "func kubernetes deploy" actually don't create queueLength attribute

3.put some messages into rabbitmq

4.RabbitMQ Scaler don't scale my deploy because of missing queueLength (keda-operator report this error log)

5. Add queueLength attribute manually , re-deploy app into k8s, it's working

Specifications

• KEDA Version: 1.4.1
• Platform & Version: Azure Cloud (include China)
• Kubernetes Version: 1.16.7 or others
• Scaler(s): RabbitMQ

[tomkerkhove]

Error log from #879:

keda-operator {"level":"info","ts":1592271606.9490728,"logger":"controller_scaledobject","msg":"Reconciling ScaledObject","Request.Namespace":"default","Request.Name":"hello-keda"}
keda-operator {"level":"info","ts":1592271606.9491096,"logger":"controller_scaledobject","msg":"Adding Finalizer for the ScaledObject","Request.Namespace":"default","Request.Name":"hello-keda"}
keda-operator {"level":"info","ts":1592271606.981627,"logger":"controller_scaledobject","msg":"Detected ScaleType = Deployment","Request.Namespace":"default","Request.Name":"hello-keda"}
keda-operator {"level":"info","ts":1592271606.981664,"logger":"controller_scaledobject","msg":"Creating a new HPA","Request.Namespace":"default","Request.Name":"hello-keda","HPA.Namespace":"default","HPA.Name":"keda-hpa-hello-keda"}
keda-operator {"level":"info","ts":1592271607.0303602,"logger":"controller_scaledobject","msg":"Reconciling ScaledObject","Request.Namespace":"default","Request.Name":"hello-keda"}
keda-operator {"level":"info","ts":1592271607.0303838,"logger":"controller_scaledobject","msg":"Detected ScaleType = Deployment","Request.Namespace":"default","Request.Name":"hello-keda"}
keda-operator {"level":"error","ts":1592271649.9625862,"logger":"azure_queue_scaler","msg":"error)","error":"-> github.com/Azure/azure-pipeline-go/pipeline.NewError, /go/pkg/mod/github.com/!azure/azure-pipeline-go@v0.2.1/pipeline/error.go:154\nHTTP request failed\n\nPut https://zygaks.queue.core.windows.net/js-queue-items?timeout=61: dial tcp: lookup zygaks.queue.core.windows.net on 10.0.0.10:53: no such host\n","stacktrace":"github.com/go-logr/zapr.(*zapLogger).Error\n\t/go/pkg/mod/github.com/go-logr/zapr@v0.1.1/zapr.go:128\ngit.luolix.top/kedacore/keda/pkg/scalers.(*azureQueueScaler).IsActive\n\tkeda/pkg/scalers/azure_queue_scaler.go:123\ngit.luolix.top/kedacore/keda/pkg/handler.(*ScaleHandler).handleScaleDeployment\n\tkeda/pkg/handler/scale_loop.go:119\ngit.luolix.top/kedacore/keda/pkg/handler.(*ScaleHandler).handleScale\n\tkeda/pkg/handler/scale_loop.go:45\ngit.luolix.top/kedacore/keda/pkg/handler.(*ScaleHandler).HandleScaleLoop\n\tkeda/pkg/handler/scale_loop.go:14"}
keda-operator {"level":"error","ts":1592271649.975142,"logger":"scalehandler","msg":"Error updating deployment","ScaledObject.Namespace":"default","ScaledObject.Name":"hello-keda","ScaledObject.ScaleType":"deployment","Deployment.Namespace":"default","Deployment.Name":"hello-keda","error":"Operation cannot be fulfilled on deployments.apps \"hello-keda\": the object has been modified; please apply your changes to the latest version and try again","stacktrace":"github.com/go-logr/zapr.(*zapLogger).Error\n\t/go/pkg/mod/github.com/go-logr/zapr@v0.1.1/zapr.go:128\ngit.luolix.top/kedacore/keda/pkg/handler.(*ScaleHandler).updateDeployment\n\tkeda/pkg/handler/scale_deployments.go:58\ngit.luolix.top/kedacore/keda/pkg/handler.(*ScaleHandler).scaleDeploymentToZero\n\tkeda/pkg/handler/scale_deployments.go:81\ngit.luolix.top/kedacore/keda/pkg/handler.(*ScaleHandler).scaleDeployment\n\tkeda/pkg/handler/scale_deployments.go:29\ngit.luolix.top/kedacore/keda/pkg/handler.(*ScaleHandler).handleScaleDeployment\n\tkeda/pkg/handler/scale_loop.go:130\ngit.luolix.top/kedacore/keda/pkg/handler.(*ScaleHandler).handleScale\n\tkeda/pkg/handler/scale_loop.go:45\ngit.luolix.top/kedacore/keda/pkg/handler.(*ScaleHandler).HandleScaleLoop\n\tkeda/pkg/handler/scale_loop.go:14"}
keda-operator {"level":"info","ts":1592271671.5685518,"logger":"controller_scaledobject","msg":"Reconciling ScaledObject","Request.Namespace":"default","Request.Name":"hello-keda"}
keda-operator {"level":"info","ts":1592271671.5686412,"logger":"controller_scaledobject","msg":"Detected ScaleType = Deployment","Request.Namespace":"default","Request.Name":"hello-keda"}
keda-operator {"level":"error","ts":1592271729.8082273,"logger":"azure_queue_scaler","msg":"error)","error":"-> github.com/Azure/azure-pipeline-go/pipeline.NewError, /go/pkg/mod/github.com/!azure/azure-pipeline-go@v0.2.1/pipeline/error.go:154\nHTTP request failed\n\nPut https://zygaks.queue.core.windows.net/js-queue-items?timeout=61: dial tcp: lookup zygaks.queue.core.windows.net on 10.0.0.10:53: no such host\n","stacktrace":"github.com/go-logr/zapr.(*zapLogger).Error\n\t/go/pkg/mod/github.com/go-logr/zapr@v0.1.1/zapr.go:128\ngit.luolix.top/kedacore/keda/pkg/scalers.(*azureQueueScaler).IsActive\n\tkeda/pkg/scalers/azure_queue_scaler.go:123\ngit.luolix.top/kedacore/keda/pkg/handler.(*ScaleHandler).handleScaleDeployment\n\tkeda/pkg/handler/scale_loop.go:119\ngit.luolix.top/kedacore/keda/pkg/handler.(*ScaleHandler).handleScale\n\tkeda/pkg/handler/scale_loop.go:45\ngit.luolix.top/kedacore/keda/pkg/handler.(*ScaleHandler).HandleScaleLoop\n\tkeda/pkg/handler/scale_loop.go:28"}
keda-operator {"level":"error","ts":1592271729.8215945,"logger":"scalehandler","msg":"Error updating deployment","ScaledObject.Namespace":"default","ScaledObject.Name":"hello-keda","ScaledObject.ScaleType":"deployment","Deployment.Namespace":"default","Deployment.Name":"hello-keda","error":"Operation cannot be fulfilled on deployments.apps \"hello-keda\": the object has been modified; please apply your changes to the latest version and try again","stacktrace":"github.com/go-logr/zapr.(*zapLogger).Error\n\t/go/pkg/mod/github.com/go-logr/zapr@v0.1.1/zapr.go:128\ngit.luolix.top/kedacore/keda/pkg/handler.(*ScaleHandler).updateDeployment\n\tkeda/pkg/handler/scale_deployments.go:58\ngit.luolix.top/kedacore/keda/pkg/handler.(*ScaleHandler).scaleDeploymentToZero\n\tkeda/pkg/handler/scale_deployments.go:81\ngit.luolix.top/kedacore/keda/pkg/handler.(*ScaleHandler).scaleDeployment\n\tkeda/pkg/handler/scale_deployments.go:29\ngit.luolix.top/kedacore/keda/pkg/handler.(*ScaleHandler).handleScaleDeployment\n\tkeda/pkg/handler/scale_loop.go:130\ngit.luolix.top/kedacore/keda/pkg/handler.(*ScaleHandler).handleScale\n\tkeda/pkg/handler/scale_loop.go:45\ngit.luolix.top/kedacore/keda/pkg/handler.(*ScaleHandler).HandleScaleLoop\n\tkeda/pkg/handler/scale_loop.go:28"}

[heavenwing]

@tomkerkhove error log of #879 is not for this issue

this issue have the log:

keda-operator {"level":"error","ts":1592269296.1828275,"logger":"controller_scaledobject","msg":"Error getting scalers","Request.Namespace":"default","Request.Name":"azfunconk8s","error":"error getting scaler for trigger #0: error parsing rabbitmq metadata: no queue length given","stacktrace":"github.com/go-logr/zapr.(*zapLogger).Error\n\t/go/pkg/mod/github.com/go-logr/zapr@v0.1.1/zapr.go:128\ngit.luolix.top/kedacore/keda/pkg/controller/scaledobject.(*ReconcileScaledObject).getScaledObjectMetricSpecs\n\tkeda/pkg/controller/scaledobject/scaledobject_controller.go:454\ngit.luolix.top/kedacore/keda/pkg/controller/scaledobject.(*ReconcileScaledObject).newHPAForScaledObject\n\tkeda/pkg/controller/scaledobject/scaledobject_controller.go:378\ngit.luolix.top/kedacore/keda/pkg/controller/scaledobject.(*ReconcileScaledObject).reconcileDeploymentType\n\tkeda/pkg/controller/scaledobject/scaledobject_controller.go:234\ngit.luolix.top/kedacore/keda/pkg/controller/scaledobject.(*ReconcileScaledObject).Reconcile\n\tkeda/pkg/controller/scaledobject/scaledobject_controller.go:155\nsigs.k8s.io/controller-runtime/pkg/internal/controller.(*Controller).reconcileHandler\n\t/go/pkg/mod/sigs.k8s.io/controller-runtime@v0.2.2/pkg/internal/controller/controller.go:216\nsigs.k8s.io/controller-runtime/pkg/internal/controller.(*Controller).processNextWorkItem\n\t/go/pkg/mod/sigs.k8s.io/controller-runtime@v0.2.2/pkg/internal/controller/controller.go:192\nsigs.k8s.io/controller-runtime/pkg/internal/controller.(*Controller).worker\n\t/go/pkg/mod/sigs.k8s.io/controller-runtime@v0.2.2/pkg/internal/controller/controller.go:171\nk8s.io/apimachinery/pkg/util/wait.JitterUntil.func1\n\t/go/pkg/mod/k8s.io/apimachinery@v0.0.0-20190404173353-6a84e37a896d/pkg/util/wait/wait.go:152\nk8s.io/apimachinery/pkg/util/wait.JitterUntil\n\t/go/pkg/mod/k8s.io/apimachinery@v0.0.0-20190404173353-6a84e37a896d/pkg/util/wait/wait.go:153\nk8s.io/apimachinery/pkg/util/wait.Until\n\t/go/pkg/mod/k8s.io/apimachinery@v0.0.0-20190404173353-6a84e37a896d/pkg/util/wait/wait.go:88"}

[tomkerkhove]

Huh I've misread the issue; thought it was the same one - Sorry!

[heavenwing]

@tomkerkhove sorry about missing "not"
#879 is different with this issue

[zroubalik]

@heavenwing good catch, thanks for reporting this.