Redis Streams

Detailed documentation on the Redis Streams pubsub component

Component format

To setup Redis Streams pubsub create a component of type pubsub.redis. See this guide on how to create and apply a pubsub configuration.

kind: Component
  name: redis-pubsub
  namespace: default
  type: pubsub.redis
  version: v1
  - name: redisHost
    value: localhost:6379
  - name: redisPassword
    value: "KeFg23!"
  - name: consumerID
    value: "myGroup"
  - name: enableTLS
    value: "false"

Spec metadata fields

Field Required Details Example
redisHost Y Connection-string for the redis host localhost:6379, redis-master.default.svc.cluster.local:6379
redisPassword Y Password for Redis host. No Default. Can be secretKeyRef to use a secret reference "", "KeFg23!"
consumerID N The consumer group ID "myGroup"
enableTLS N If the Redis instance supports TLS with public certificates, can be configured to be enabled or disabled. Defaults to "false" "true", "false"
redeliverInterval N The interval between checking for pending messages to redelivery. Defaults to "60s". "0" disables redelivery. "30s"
processingTimeout N The amount time a message must be pending before attempting to redeliver it. Defaults to "15s". "0" disables redelivery. "30s"
queueDepth N The size of the message queue for processing. Defaults to "100". "1000"
concurrency N The number of concurrent workers that are processing messages. Defaults to "10". "15"

Create a Redis instance

Dapr can use any Redis instance - containerized, running on your local dev machine, or a managed cloud service, provided the version of Redis is 5.0.0 or later.

The Dapr CLI will automatically create and setup a Redis Streams instance for you. The Redis instance will be installed via Docker when you run dapr init, and the component file will be created in default directory. ($HOME/.dapr/components directory (Mac/Linux) or %USERPROFILE%\.dapr\components on Windows).

You can use Helm to quickly create a Redis instance in our Kubernetes cluster. This approach requires Installing Helm.

  1. Install Redis into your cluster.

    helm repo add bitnami
    helm install redis bitnami/redis
  2. Run kubectl get pods to see the Redis containers now running in your cluster.

  3. Add redis-master:6379 as the redisHost in your redis.yaml file. For example:

        - name: redisHost
          value: redis-master:6379
  4. Next, we’ll get our Redis password, which is slightly different depending on the OS we’re using:

    • Windows: Run kubectl get secret --namespace default redis -o jsonpath="{.data.redis-password}" > encoded.b64, which will create a file with your encoded password. Next, run certutil -decode encoded.b64 password.txt, which will put your redis password in a text file called password.txt. Copy the password and delete the two files.

    • Linux/MacOS: Run kubectl get secret --namespace default redis -o jsonpath="{.data.redis-password}" | base64 --decode and copy the outputted password.

    Add this password as the redisPassword value in your redis.yaml file. For example:

        - name: redisPassword
          value: "lhDOkwTlp0"
Last modified May 13, 2021: Add presentations section (#1480) (7894758)