ws.reflect

ws.reflect

Listens on ws port 7114 and will echo back whatever is sent to the server, broadcasting to all clients. Listens on wss port 7143 and will echo back whatever is sent to the server, broadcasting to all clients.

Requirements

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

Setup

The setup.sh script:

• installs Zilla to the Kubernetes cluster with helm and waits for the pod to start up
• starts port forwarding

./setup.sh

output:

+ ZILLA_CHART=oci://ghcr.io/aklivity/charts/zilla
+ helm upgrade --install zilla-ws-reflect oci://ghcr.io/aklivity/charts/zilla --namespace zilla-ws-reflect --create-namespace --wait [...]
NAME: zilla-ws-reflect
LAST DEPLOYED: [...]
NAMESPACE: zilla-ws-reflect
STATUS: deployed
REVISION: 1
NOTES:
Zilla has been installed.
[...]
+ nc -z localhost 7114
+ kubectl port-forward --namespace zilla-ws-reflect service/zilla 7114 7143
+ sleep 1
+ nc -z localhost 7114
Connection to localhost port 7114 [tcp/http-alt] succeeded!

Verify behavior

Connect each client first, then send Hello, one from first client, then send Hello, two from second client.

wscat -c ws://localhost:7114/ -s echo

Type a Hello, one message and press enter.

output:

Connected (press CTRL+C to quit)
> Hello, one
< Hello, one
< Hello, two

wscat -c wss://localhost:7143/ --ca test-ca.crt -s echo

Type a Hello, two message and press enter.

output:

Connected (press CTRL+C to quit)
< Hello, one
> Hello, two
< Hello, two

Teardown

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

./teardown.sh

output:

+ pgrep kubectl
99999
+ killall kubectl
+ helm uninstall zilla-ws-reflect --namespace zilla-ws-reflect
release "zilla-ws-reflect" uninstalled
+ kubectl delete namespace zilla-ws-reflect
namespace "zilla-ws-reflect" deleted