Dapr is an open source, portable, event-driven runtime that makes it easy for developers to build resilient, microservice stateless and stateful applications that run on the cloud and edge. Dapr embraces the diversity of all programming languages and developer frameworks and simplifies building applications.
Dapr building blocks
- Service Invocation – Resilient service-to-service invocation enables method calls, including retries, on remote services wherever they are running in the supported hosting environment.
- State management – With state management for key/value pairs, long running, highly available, stateful services can be easily written, alongside stateless services in the same application. The state store is pluggable and can include Azure Cosmos or Redis, with others such as AWS DynamoDB on the component roadmap.
- Publish and subscribe messaging between services – Publishing events and subscribing to topics between services enables event-driven architectures to simplify horizontal scalability and make them resilient to failure.
- Event driven resource bindings – Resource bindings and triggers build further on event-driven architectures for scale and resiliency by receiving and sending events to and from any external resources such as databases, queues, file systems, blob stores, webhooks, etc. For example, your code can be triggered by a message on an Azure EventHub service and write data to Azure CosmosDB.
- Virtual actors – A pattern for stateless and stateful objects that make concurrency simple with method and state encapsulation. Dapr provides many capabilities in its virtual actor runtime including concurrency, state, life-cycle management for actor activation/deactivation and timers and reminders to wake up actors.
- Distributed tracing between services – Easily diagnose and observe inter-service calls in production using the W3C Trace Context standard and push events to tracing and monitoring systems.
You can read more about Dapr at http://dapr.io, get started with code and samples at https://github.com/dapr/dapr and reach out on gitter.im/Dapr or Twitter @daprdev.
Getting started with Dapr is easy and you can start with a few steps described below
How to get up and running with Dapr in minutes
The following steps in this guide are:
- Install the Dapr CLI
- Initialize Dapr
- Use the Dapr API
- Configure a component
- Explore Dapr quickstarts
powershell -Command "iwr -useb https://raw.githubusercontent.com/dapr/cli/master/install/install.ps1 | iex"
Important is to close the powershell window and reopen this. Else the module won’t be active
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A serverless runtime for hyperscale, distributed systems
completion Generates shell completion scripts
components List all Dapr components
configurations List all Dapr configurations
dashboard Start Dapr dashboard
help Help about any command
init Setup dapr in Kubernetes or Standalone modes
invoke Invokes a Dapr app with an optional payload (deprecated, use invokePost)
invokeGet Issue HTTP GET to Dapr app
invokePost Issue HTTP POST to Dapr app with an optional payload
list List all Dapr instances
logs Gets Dapr sidecar logs for an app in Kubernetes
mtls Check if mTLS is enabled in a Kubernetes cluster
publish Publish an event to multiple consumers
run Launches Dapr and (optionally) your app side by side
status Shows the Dapr system services (control plane) health status.
stop Stops multiple running Dapr instances and their associated apps
uninstall Removes a Dapr installation
-h, –help help for dapr
–version version for dapr
Use “dapr [command] –help” for more information about a command.
subcommand is required
PS C:\Windows\system32> dapr init
Making the jump to hyperspace…
Downloading binaries and setting up components…
Unable to find image ‘openzipkin/zipkin:latest’ locally
latest: Pulling from openzipkin/zipkin
docker: no matching manifest for windows/amd64 10.0.17763 in the manifest list entries.
See ‘docker run –help’.
Quickstarts and Samples
- See the quickstarts repository for code examples that can help you get started with Dapr.
- Explore additional samples in the Dapr samples repository.
You can try out the Dapr quickstarts right here to begin your own personal journey into Microservices on Azure.
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