As of now, the Event Hub scaler only supports reading checkpoints from Blob Storage, as well as scaling only Event Hub applications written in C#, Java, Python or created with Azure Functions.
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Scale applications based on Azure Event Hubs.
This specification describes the
azure-eventhub trigger for Azure Event Hubs.
triggers: - type: azure-eventhub metadata: connection: EVENTHUB_CONNECTIONSTRING_ENV_NAME # Connection string for Event Hub namespace appended with "EntityPath=<event_hub_name>" storageConnection: STORAGE_CONNECTIONSTRING_ENV_NAME # Connection string for account used to store checkpoint. As of now the Event Hub scaler only reads from Azure Blob Storage. consumerGroup: $Default # Optional. Consumer group of event hub consumer. Default: $Default unprocessedEventThreshold: '64' # Optional. Target number of unprocessed events across all partitions in Event Hub for HPA. Default: 64 events. blobContainer: 'name_of_container' # Optional. Container name to store checkpoint. This is needed when a using an Event Hub application written in dotnet or java, and not an Azure function.
connection value is the name of the environment variable your deployment uses to get the Event Hub connection string which is appended with the Event Hub name using Entity Path variable.
storageConnection is the name of the environment variable your deployment uses to get the Storage connection string.
Environment variables are usually resolved from a
Secret V1 or a
ConfigMap V1 collections.
envFrom are both supported.
Not supported yet.
apiVersion: keda.k8s.io/v1alpha1 kind: ScaledObject metadata: name: azure-eventhub-scaledobject namespace: default spec: scaleTargetRef: deploymentName: azureeventhub-function triggers: - type: azure-eventhub metadata: # Required connection: EventHub storageConnection: AzureWebJobsStorage # Optional consumerGroup: $Default # default: $Default unprocessedEventThreshold: '64' # default 64 events. blobContainer: ehcontainer