https://github.com/ricardozanini/ce-processing
Vert.x + CloudEvents + Knative playground
https://github.com/ricardozanini/ce-processing
cloudevents knative kubernetes vertx
Last synced: 7 months ago
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Vert.x + CloudEvents + Knative playground
- Host: GitHub
- URL: https://github.com/ricardozanini/ce-processing
- Owner: ricardozanini
- License: apache-2.0
- Created: 2020-07-07T20:49:59.000Z (over 5 years ago)
- Default Branch: master
- Last Pushed: 2023-12-01T17:22:41.000Z (almost 2 years ago)
- Last Synced: 2025-02-01T21:41:22.338Z (8 months ago)
- Topics: cloudevents, knative, kubernetes, vertx
- Language: Java
- Homepage:
- Size: 98.6 KB
- Stars: 0
- Watchers: 2
- Forks: 0
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
- License: LICENSE
Awesome Lists containing this project
README
# CloudEvents Processing
This is a very simple showcase of how to use the [CloudEvent Java SDK](https://github.com/cloudevents/sdk-java) to process
events in a Kubernetes cluster on top of Knative.
The following image illustrates the architecture of the showcase.
Take a look at the [`kubernetes`](kubernetes) directory for more details about the
objects created in the cluster.
## Try it out locally
This image is available on Quay.io:
```shell script
$ podman run --rm -it -p 8080:8080 quay.io/ricardozanini/ce-processing:1.0
```
Then just `curl` the 8080 port:
```shell script
$ curl -X POST \
-H "content-type: application/json" \
-H "ce-specversion: 1.0" \
-H "ce-source: curl-command" \
-H "ce-type: curl.demo" \
-H "ce-id: 123-abc" \
-d '{"name":"Zanini"}' \
http://localhost:8080
```
You should see the application logs like:
```shell script
19:20:51.078 [vert.x-eventloop-thread-1] INFO o.m.c.ce.CloudEventConsumerVerticle - Initializing Vertx Server
19:20:51.178 [vert.x-eventloop-thread-2] INFO o.m.c.ce.CloudEventProducerVerticle - CE Publisher started, will publish events to 'http://localhost:8080/' endpoint
19:20:51.180 [vert.x-eventloop-thread-0] INFO org.m88i.cloud.ce.MainVerticle - Successfully deployed MainVerticle
19:20:51.183 [vert.x-eventloop-thread-1] INFO o.m.c.ce.CloudEventConsumerVerticle - Server started on port 8080
Jul 10, 2020 7:20:51 PM io.vertx.core.impl.launcher.commands.VertxIsolatedDeployer
INFO: Succeeded in deploying verticle
19:21:05.802 [vert.x-eventloop-thread-1] INFO o.m.c.ce.CloudEventConsumerVerticle - Received event:
☁ ️cloudevents.Event
Context Attributes,
specversion: 1.0
type: curl.demo
source: curl-command
id: 123-abc
time: null
Extensions,
Data,
{"name":"Zanini"}
19:21:05.822 [vert.x-eventloop-thread-2] INFO o.m.c.ce.CloudEventProducerVerticle - Received internal message. Creating new CE request to http://localhost:8080/
19:21:05.869 [vert.x-eventloop-thread-1] INFO o.m.c.ce.CloudEventConsumerVerticle - Received event:
☁ ️cloudevents.Event
Context Attributes,
specversion: 1.0
type: success.ce.demo
source: 69af641bcc77
id: 67c4944f-7379-40d5-b2b9-ea2bd436353b
time: null
Extensions,
Data,
CE Processed ID: 123-abc
19:21:05.870 [vert.x-eventloop-thread-1] INFO o.m.c.ce.CloudEventConsumerVerticle - Won't emit a follow up CloudEvent since CloudEvent{id='67c4944f-7379-40d5-b2b9-ea2bd436353b', source=69af641bcc77, type='success.ce.demo', datacontenttype='null', dataschema=null, subject='null', time=null, data=[67, 69, 32, 80, 114, 111, 99, 101, 115, 115, 101, 100, 32, 73, 68, 58, 32, 49, 50, 51, 45, 97, 98, 99], extensions={}} comes from a local source
```
## Running with Knative Eventing
1. Install [`minikube`](https://kubernetes.io/docs/tasks/tools/install-minikube/) and `kubectl` or have a Kubernetes cluster available
2. Setup [Istio + Knative](https://knative.dev/docs/install/)
```shell script
# create the namespace
kubectl create namespace ce
# enable Knative Eventing injection
kubectl label namespace ce knative-eventing-injection=enabled
# deploy the application
kubectl apply -f kubernetes/ce-service-deploy.yaml -n ce
# deploy consumer and producers for the application
kubectl apply -f kubernetes/consumer-trigger.yaml -n ce
kubectl apply -f kubernetes/producer-sinkbinding.yaml -n ce
# deploy the event display
kubectl apply -f kubernetes/event-display.yaml -n ce
# deploy the event source
kubectl apply -f kubernetes/emitter.yaml -n ce
```
To see the showcase in action, try looking the logs of the deployed application:
```shell script
kubectl logs -f ce-processing- -n ce
```
## References
- [Setting up Knative Eventing Resources](https://knative.dev/docs/eventing/getting-started/#setting-up-knative-eventing-resources)
- [Processing CloudEvents with Eclipse Vert.x](https://developers.redhat.com/blog/2018/12/11/processing-cloudevents-vertx/)
- [CloudEvents Java SDK](https://github.com/cloudevents/sdk-java/tree/master/http/vertx)