Distributed Application Runtime (Dapr) - Azure Israel 2020

Moaid Hathot
Software Architect
Moaid.hathot@outlook.com
@MoaidHathot
https://moaid.codes
https://meetup.com/Code-Digest
Dapr: Distributed Application Runtime

Microservices
More and more applications are being developed
as distributed applications
2

Microservices
 Modularity
 Loose service coupling
 Service-independent deployments
 Better scalability
 Better reliability
 Multiple stacks
3

Microservices – price tag
 Concurrency issues
 Failure handling
 Retry policies
 State management
 Distributed tracing
 Deployment
4

Microservices – price tag
Less time to develop business logic
5

About Moaid Hathot
7
Moaid Hathot
 Software Architect & Code Jedi @ CodeValue
 Software Craftsmanship advocate
 Clean Coder
 Co-Founder of Code.Digest();
 OzCode Evangelist

Microservices – solutions
 Serverless architecture
 Azure Functions & AWS Lambada
 Stateless, event-driven microservices
 Virtual Actor model
 Object-oriented microservices
 E.g Microsoft Orleans
 The cloud takes care of
 Activating, retries, scaling, failure handling
8

Microservices – solution issues
 Coupled to Stack
 Coupled to cloud providers
 A single application depends on multiple SDKs
 FaaS and Actor integration can be complicated
 FaaS runtimes can be heavy
9

Dapr
Distributed Application Runtime
10

Dapr
 Portable, Event-driven runtime for building microservices
 Open Source
 https://github.com/dapr/dapr
 7.4K Github stars
 145 contributors
 28+ new components since launch
 Alpha phase
11

Dapr
 Supports any platform
 Services knows only HTTP/gRPC
 Can decide to use dedicated SDKs
 Services are not aware of the actual technologies
 Services are not aware of other services
 Everything is configurable via yaml file
 E.g you can switch from Cosmos DB to DynamoDB
12

Dapr
 Sidecar architecture
 Dapr is isolated via Process or Container from your app
 Two hosting modes
 Self hosting
 Kubernetes
13

Dapr – self hosting
16
HTTP/gRPC

Dapr – Kubernetes
17
HTTP/gRPC

Dapr – Kubernetes
18
HTTP/gRPC
Container
Container

Dapr – Kubernetes
19
HTTP/gRPC
Container
Container
Pod

Dapr – building blocks
21
Image Source

22
Image Source

23
Image Source

24
Image Source

25
Image Source

26
Image Source

27
Image Source

28
Image Source

Dapr – Service Invocation
 Every service has an id (name)
 Calling services has to know that id
 HTTP or gRPC
 Takes care of
 Discoverability
 Reliability
 Retries
 Failure handling
30

31
Image Source

32
Image Source

33
Image Source

34
Image Source

35
Image Source

36
Image Source

37
Image Source

38
Image Source

Demo
 Run Dapr
 Service Invocation
40

Dapr – State Management
 The actual store is not known to services
 Support for many platforms, including:
 Redis
 AWS DynamoDB
 Azure Cosmos DB
 MongoDB
 Cassandra
 SQL Server
 More…
 Easy to implement new state store
41

42
Image Source

43
Image Source

44
Image Source

45
Image Source

46
Image Source

47
Image Source

Dapr - Secrets
 Provides an API for retrieving secrets
 Supports
 Azure KeyVault
 AWS Secret Manager
 GCP Cloud KMS
 GCP Secret Manager
 Kubernetes
 Hashicorp Vault
 More…
 Easy to implement new secret stores
48

Dapr – Secrets
49
Image Source

Demo
 State Management
 Redis
 CosmosDB
 Secret Store
 Azure KeyVault
50

Dapr – Pub/Sub
 Publish/subscribe pattern
 Used for decoupling services
 Producer send messages to a topic
 Consumers receives messages from a topic
 Dapr APIs provides at-least-once guarantees
 Supports multiple brokers
 Kafka
 RabbitMQ
 Redis Streams
 Azure Event Hubs
 More…
51

Dapr – Pub/Sub
52
Image Source

Dapr – Pub/Sub
53
Image Source

Dapr – Pub/Sub
54
Image Source

Dapr – Pub/Sub
55
Image Source

Dapr – Pub/Sub
56
Image Source

Dapr – Resource Bindings
 Input/Output with cloud resources
 Similar in concepts to Azure Function’s Binding
 Trigger your service or invoke external systems
 Takes care of connections, polling, queuing, etc…
 Benefits
 Focus on Business logic
 Your code is free from SDKs and libraries
 Auto handling for retries & failure recovery
 Switch bindings at run time
 Deploy to different environments without code changes
58

 Inputs (partial list)
 Kafka
 RabbitMQ
 AWS Kinesis
 AWS SQS
 GCP Cloud Pub/Sub
 Azure EventHubs
 Azure SignalR Service
 Azure Service Bus Queues
 More…
59

 Outputs (partial list)
 Kafka
 RabbitMQ
 AWS Kinesis
 AWS DynamoDB
 GCP Cloud Pub/Sub
 GCP Storage Bucket
 Azure EventHubs
 Azure SignalR Service
 More…
60

63
Cosmos DB
DynamoDB
Event Hubs

Demo
 Bindings
 SignalR Binding
64

Dapr – Observability
 Monitor the Dapr system services
 Including interaction and behaviors
 Integrates with OpenTelemetry
 Supports
 Azure Monitor
 Azure ApplicationInsights
 Elastic Search
 Zipkin
 More…
65

Dapr – Observability
 Metrics
 Latency, traffic failures, error rate, CPU usage, etc…
 Logs
 Traces, errors, etc…
 Each trace contains hostname, component name and id, more…
 Distributed Tracing
 Debugging and monitoring distributed flows
 W3C tracing
 Health
 Determine health via HTTP endpoint
66

Dapr - Dashboard
 Web-based UI for Dapr
 View information, logs, etc…
 Support both locally and Kubernetes sidecars
 Can stop running sidecars (Self hosted)
 View sidecars logs
67

Dapr - Dashboard
68
Image Source
More Info

Dapr – Virtual Actors
 The Actor Model
 Self-contained unit of code (actor)
 Actors interacts using via messages
 The runtime manages how, when and where each actor runs
 Dapr implements the Virtual Actors Model
 Takes care of
 Lifetime
 Retries
 Failover
 Concurrency
70

summary
 Microservices has many benefits
 But also challenges
 Dapr
 Runtime for building microservices
 Any platform, any stack, any environment
 Takes care of a lot of the challenges
 Open Source
 Community
 Demo repo:
 https://github.com/MoaidHathot/Azure-Israel-Dapr-2020
71

Moaid Hathot
Software Architect
moaid.hathot@outlook.com
@MoaidHathot
https://moaid.codes
https://meetup.com/Code-Digest

Distributed Application Runtime (Dapr) - Azure Israel 2020

More Related Content

What's hot (11)

Similar to Distributed Application Runtime (Dapr) - Azure Israel 2020 (20)

More from Moaid Hathot (20)

Recently uploaded (20)

Distributed Application Runtime (Dapr) - Azure Israel 2020