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Building Event Driven
Apps with Dapr in
Kubernetes
SivamuthuKumar
August 5, 2020
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Sivamuthu Kumar
Technical Advisor, Architect, Dev Advocate,
Cloud, Mobile, IoT, ML
Orlando, FL
ksivamuthu ksivamuthu ksivamuthu
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Dapr
Distributed Application Runtime
https://dapr.io
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Distributed
Application
Runtime
Portable event-driven runtime
Building event driven, stateless and stateful
applications
Building blocks for cloud and edge
Standard APIs for portability and extensibility
Sidecar architecture and supported
infrastructures
Developer language SDKs and frameworks
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Sidecar Architecture
Standalone Kubernetes
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Demo
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“frontend”
“cart”
Post
http://localhost:3500/v1.0/invoke/cart/method/checkout
{
"user":"johndoe",
"cart":"0001"
}
Post
http://10.0.0.2:8000/checkout
{
"user":"johndoe",
"cart":"0001"
}
Service invocation
Microservice building blocks
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App
“myApp”
{
"name": "Tatooine"
}
Get
http://localhost:3500/v1.0/state//planet
Post
http://localhost:3500/v1.0/state/
[{
"key": "weapon",
"value": "DeathStar"
}, {
"key": "planet",
"value": {
"name": "Tatooine"
}
}]
key value
myApp-
weapon
"DeathStar"
myApp-planet {
"name":
"Tatooine"
}
State management: key/value
Microservice building blocks
State store of your choice
CosmosDB
AWS
DynamoDB
…others
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Subscribe
Publish
Post
http://localhost:3500/v1.0/publish/
"topic":"order",
"data":{
"user":"johndoe",
"item":"ZeroDay"
},
“cart”
Publish and subscribe
Microservice building blocks
“shipping”
Post
http://10.0.0.5:8005/order
"data":{
"user":"johndoe",
"item":"ZeroDay"
}
“email”
Post
http://10.0.0.4:8004/order
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App
Get / Post
http://localhost:8000/trigger
{
"user":"johndoe"
}
Redis
SQS
Event Hubs
Kafka
Redis
Kafka
SQS
Event Hubs
Resource triggers: Input
Microservice building blocks
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{
"data":
{
"sku":"v100",
"quantity":"50"
}
}
Post
http://localhost:3500/v1.0/bindings/myDatabase
Resource bindings: Output
Microservice building blocks
App
“myApp”
DynamoDB
Redis
Event Hubs
CosmosDB
Kafka
Twilio
Redis
DynamoDB
Kafka
Twilio
Event Hubs
CosmosDB
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App Insights
Datadog
Instana
Jaeger
SignalFX
Prometheus
+ many more
App Insights
Azure Monitor
+ many more
Datadog
Instana
Jaeger
SignalFX
Prometheus
Distributed tracing and diagnostics
Microservice building blocks
App
“frontend”
App
“backend”
OpenCensus
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Reference
• https://dapr.io
• https://github.com/dapr
• Twitter - @daprdev
• https://dev.to/abhirockzz/dapr-qna-34m5
• Aaron Schlesinger & Jennifer Davis – CloudNative Wednesdays
https://www.twitch.tv/arschles
• https://github.com/ksivamuthu/cloud-dapr-demo
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Thank you
Sivamuthu Kumar
ksivamuthu