Dapr 101: start building distributed applications with ease

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Dapr 101: start building distributed apps with ease

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2 Azure MVP Dapr Community Manager ❤ pixel art Marc Duiker Sr Dev Advocate [email protected]

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4 Demos! What is Dapr? When to use Dapr? 4 Why use Dapr? Q&A + swag

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What is Dapr? 6

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7 E-commerce system State Management Email Payment Front-end Shipping Checkout Inventory Cart Internet Queue I just want to trace my calls end-to-end. How do I encrypt calls with ongoing cert rotation? How do applications discover and call each other? How do I handle failed calls and perform retries? How do I secure access to my data layer? How do I handle state conflicts from multiple apps? How do I measure latency on my database? How do I orchestrate business logic transactions? How do I send messages to many applications? Developer challenges

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8 Distributed application runtime

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Dapr is a portable, event- driven, runtime for building distributed applications across cloud and edge. 9

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10 virtual or physical machines

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11 Why use Dapr?

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Speeds up microservice development by providing a common set of building block APIs. 12

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13 Service invocation State Management Publish & subscribe Bindings (input & output) Actors Secret Stores Configuration Observability Workflows Distributed Lock Building block APIs

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14 HTTP/gRPC Dapr API Dapr sidecar Application App

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15 POST http:// localhost:3500/v1.0/invoke/cart/method/order GET http:// localhost:3500/v1.0/state/inventory/item67 POST http:// localhost:3500/v1.0/publish/order GET http:// localhost:3500/v1.0/secrets/vault/password42 POST http:// localhost:3500/v1.0-alpha1/workflows/dapr/businessprocess/1234/start HTTP/gRPC Dapr API App

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16 C# Python Java Script Java Go Client SDKs

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17 10th largest CNCF project Submitted to CNCF Nov 2021 Incubation maturity level www .cncf.io/projects/dapr/ Dapr project

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19 20.5K GitHub stars 2.5K Contributors +1M Docker pulls / month 290k Unique doc views / month 5.4k Discord members 19

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20 Contributing organizations

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21 Dapr users

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22 Bindings Configuration State Management Publish & subscribe Observability Actors Secret Stores Workflows Distributed Lock Components AWS DynamoDB Azure CosmosDB GCP Firebase Redis Cassandra AWS SQS Azure Service Bus GCP Pub/Sub Redis RabbitMQ AWS Secrets mngr Azure KeyVault GCP Secret mngr HashiCorp Vault Kubernetes Secrets AWS DynamoDB Azure CosmosDB Redis MongoDB Postgres AWS S3 Azure Storage GCP Storage Twilio Kafka Jeager Zipkin Prometheus App Insights Datadog Redis Redis Azure App Configuration Dapr Workflow Building Block APIs

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23 App CosmosDB

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24 Sidecar App CosmosDB metadata: name: mystorage spec: type: state.azure.cosmosdb metadata: - name: value: state.save() state.get() yaml

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25 Redis metadata: name: mystorage spec: type: state.redis metadata: - name: value: Sidecar App state.save() state.get() yaml

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26 Dapr APIs are cloud agnostic. Do they implement the lowest common denominator?

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27 Building block APIs are basic, by design. Dapr adds a lot of functionality.

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28 https:// docs.dapr.io/reference/components-reference/supported-state-stores/

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29 https:// docs.dapr.io/developing-applications/building-blocks/pubsub/pubsub-cloudevents/

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31 Unified API with flexibility at the component level.

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32 Is Dapr a service mesh?

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33 No.

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34 Dapr & service mesh similarities: Distributed Tracing Secure Communication Metric Collection

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35 Developer centric docs.dapr.io/concepts/service-mesh/ Building block APIs & components Infrastructure centric Service mesh ≠ Network traffic & Routing

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When to use Dapr? 36

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37 You are in a large organisation with many different teams or tech stacks.

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Greenfield projects: postpone your architecture decisions. 38

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When not to use Dapr? 39

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40 If your team is allergic to containers & Kubernetes ;)

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Building block demos 41 github.com/dapr/quickstarts

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42 Service invocation Checkout Order processor POST

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43 Publish & subscribe Checkout Order processor

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44 State Management Redis Order processor

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45 Workflows Activity 1 Activity 3 Activity 2 End Start Chaining

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46 Workflows Activity 1 Activity 3 Activity 2 End Start Fan-out fan-in

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