+ kubectl apply -f manifest.yaml
pod/client created
deployment.apps/echo created
service/echo created
deployment.apps/app-emits-503 created
service/app-emits-503 created

+ kubectl -n istio-vt-t73 wait --for=condition=Ready pod/client --timeout=90s
pod/client condition met

+ kubectl -n istio-vt-t73 wait --for=condition=available deploy/app-emits-503 --timeout=60s
deployment.apps/app-emits-503 condition met

+ kubectl -n istio-vt-t73 wait --for=condition=available deploy/echo --timeout=60s
deployment.apps/echo condition met

+ kubectl -n istio-vt-t73 get pods -o wide
NAME                            READY   STATUS    RESTARTS   AGE   IP               NODE          NOMINATED NODE   READINESS GATES
app-emits-503-d79b777b7-46x2f   2/2     Running   0          4s    10.255.126.42    k8s-worker2   <none>           <none>
client                          2/2     Running   0          4s    10.255.194.118   k8s-worker1   <none>           <none>
echo-5767bbcc56-28hz4           2/2     Running   0          4s    10.255.194.95    k8s-worker1   <none>           <none>

+ kubectl -n istio-vt-t73 exec client -c curl -- curl -s -o /dev/null -w 'app_level_503=%{http_code}
' http://app-emits-503.istio-vt-t73.svc.homelab.local/
app_level_503=503

+ kubectl -n istio-vt-t73 logs client -c istio-proxy --since=30s | grep 'app-emits-503' | tail -5
[2026-07-05T00:13:49.863Z] "GET / HTTP/1.1" 503 - via_upstream - "-" 0 15 4 3 "-" "curl/8.14.1" "35b9fcb7-8b14-489b-8f64-9d25154fda3e" "app-emits-503.istio-vt-t73.svc.homelab.local" "10.250.97.146:80" PassthroughCluster 10.255.194.118:45526 10.250.97.146:80 10.255.194.118:45514 - allow_any

+ kubectl -n istio-vt-t73 scale deploy/app-emits-503 --replicas=0
deployment.apps/app-emits-503 scaled

+ sleep 5

+ kubectl -n istio-vt-t73 get endpoints app-emits-503
NAME            ENDPOINTS   AGE
app-emits-503   <none>      30s

+ kubectl -n istio-vt-t73 exec client -c curl -- curl -s -o /dev/null -w 'no_upstream_at_all=%{http_code}
' http://app-emits-503.istio-vt-t73.svc.homelab.local/
no_upstream_at_all=503

+ kubectl -n istio-vt-t73 logs client -c istio-proxy --since=30s | grep 'app-emits-503' | tail -5
[2026-07-05T00:13:49.863Z] "GET / HTTP/1.1" 503 - via_upstream - "-" 0 15 4 3 "-" "curl/8.14.1" "35b9fcb7-8b14-489b-8f64-9d25154fda3e" "app-emits-503.istio-vt-t73.svc.homelab.local" "10.250.97.146:80" PassthroughCluster 10.255.194.118:45526 10.250.97.146:80 10.255.194.118:45514 - allow_any
[2026-07-05T00:14:09.888Z] "GET / HTTP/1.1" 503 UF upstream_reset_before_response_started{remote_connection_failure|delayed_connect_error:_Connection_refused} - "delayed_connect_error:_Connection_refused" 0 98 0 - "-" "curl/8.14.1" "de10dc01-8947-4405-84f6-4a305d09fc13" "app-emits-503.istio-vt-t73.svc.homelab.local" "10.250.97.146:80" PassthroughCluster - 10.250.97.146:80 10.255.194.118:59230 - allow_any

--- extra diagnostic (not part of spec commands, for interpretation only) ---
+ kubectl -n istio-vt-t73 exec client -c curl -- curl -s -o /dev/null -w 'echo_check=%{http_code}
' http://echo.istio-vt-t73.svc.homelab.local/
echo_check=200

+ kubectl -n istio-vt-t73 logs client -c istio-proxy --since=15s | grep 'echo.istio-vt-t73' | tail -3
[2026-07-05T00:15:04.170Z] "GET / HTTP/1.1" 200 - via_upstream - "-" 0 606 20 20 "-" "curl/8.14.1" "179eefd4-0d64-4ace-8996-bc3af92a6f3a" "echo.istio-vt-t73.svc.homelab.local" "10.250.183.157:80" PassthroughCluster 10.255.194.118:38042 10.250.183.157:80 10.255.194.118:38038 - allow_any

+ kubectl -n istio-vt-t73 get svc app-emits-503 echo -o wide
NAME            TYPE        CLUSTER-IP       EXTERNAL-IP   PORT(S)          AGE   SELECTOR
app-emits-503   ClusterIP   10.250.97.146    <none>        80/TCP           87s   app=app-emits-503
echo            ClusterIP   10.250.183.157   <none>        80/TCP,443/TCP   87s   app=echo