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http.redpanda.sasl.scram

Listens on http port 7114 or https port 7143 and will produce messages to the events topic in SASL/SCRAM enabled Redpanda cluster, synchronously.

Requirements

  • bash, jq, nc
  • Kubernetes (e.g. Docker Desktop with Kubernetes enabled)
  • kubectl
  • helm 3.0+
  • kcat

Install kcat client

Requires Kafka client, such as kcat.

brew install kcat

Setup

The setup.sh script:

  • installs Zilla and Redpanda to the Kubernetes cluster with helm and waits for the pods to start up
  • creates the user user in Redpanda
  • creates the events topic in Redpanda
  • starts port forwarding
./setup.sh

output:

+ ZILLA_CHART=oci://ghcr.io/aklivity/charts/zilla
+ helm upgrade --install zilla-http-redpanda-sasl-scram ./zilla-0.1.0.tgz --namespace zilla-http-redpanda-sasl-scram --create-namespace --wait [...]
NAME: zilla-http-redpanda-sasl-scram
LAST DEPLOYED: [...]
NAMESPACE: zilla-http-redpanda-sasl-scram
STATUS: deployed
REVISION: 1
NOTES:
Zilla has been installed.
[...]
+ helm upgrade --install zilla-http-redpanda-sasl-scram-redpanda chart --namespace zilla-http-redpanda-sasl-scram --create-namespace --wait
NAME: zilla-http-redpanda-sasl-scram-redpanda
LAST DEPLOYED: [...]
NAMESPACE: zilla-http-redpanda-sasl-scram
STATUS: deployed
REVISION: 1
TEST SUITE: None
++ kubectl get pods --namespace zilla-http-redpanda-sasl-scram --selector app.kubernetes.io/instance=redpanda -o name
+ REDPANDA_POD=pod/redpanda-1234567890-abcde
+ kubectl exec --namespace zilla-http-redpanda-sasl-scram pod/redpanda-1234567890-abcde -- rpk acl user create user -p redpanda
Created user "user".
+ kubectl exec --namespace zilla-http-redpanda-sasl-scram pod/redpanda-1234567890-abcde -- rpk topic create events --user user --password redpanda --sasl-mechanism SCRAM-SHA-256
TOPIC   STATUS
events  OK
+ kubectl port-forward --namespace zilla-http-redpanda-sasl-scram service/zilla 7114 7143
+ nc -z localhost 7114
+ kubectl port-forward --namespace zilla-http-redpanda-sasl-scram service/redpanda 9092
+ sleep 1
+ nc -z localhost 7114
Connection to localhost port 7114 [tcp/http-alt] succeeded!
+ nc -z localhost 9092
Connection to localhost port 9092 [tcp/XmlIpcRegSvc] succeeded!

Verify behavior

Send a POST request with an event body.

curl -v \
       -X "POST" http://localhost:7114/events \
       -H "Content-Type: application/json" \
       -d "{\"greeting\":\"Hello, world\"}"

output:

...
> POST /events HTTP/1.1
> Content-Type: application/json
...
< HTTP/1.1 204 No Content

Verify that the event has been produced to the events topic in Redpanda cluster.

kcat -b localhost:9092 -X security.protocol=SASL_PLAINTEXT \
  -X sasl.mechanisms=SCRAM-SHA-256 \
  -X sasl.username=user \
  -X sasl.password=redpanda \
  -t events -J -u | jq .

output:

{
  "topic": "events",
  "partition": 0,
  "offset": 0,
  "tstype": "create",
  "ts": 1652465273281,
  "broker": 1001,
  "headers": [
    "content-type",
    "application/json"
  ],
  "payload": "{\"greeting\":\"Hello, world\"}"
}
% Reached end of topic events [0] at offset 1

Teardown

The teardown.sh script stops port forwarding, uninstalls Zilla and Redpanda and deletes the namespace.

./teardown.sh

output:

+ pgrep kubectl
99999
99998
+ killall kubectl
+ helm uninstall zilla-http-redpanda-sasl-scram zilla-http-redpanda-sasl-scram-redpanda --namespace zilla-http-redpanda-sasl-scram
release "zilla-http-redpanda-sasl-scram" uninstalled
release "zilla-http-redpanda-sasl-scram-redpanda" uninstalled
+ kubectl delete namespace zilla-http-redpanda-sasl-scram
namespace "zilla-http-redpanda-sasl-scram" deleted