Added service-scale test to stress test skupper

tests/e2e/scenarios/service-scale/README.md

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+# Service Scale Test
+
+This scenario stress-tests Skupper by creating a large number of services via Listener/Connector pairs across two sites. It focuses on scale along these dimensions:
+
+- Number of Listeners (west)
+- Number of Connectors (east)
+
+It provisions two sites (`west` and `east`), deploys a single backend app on the `east` site, and then creates N service pairs that route to the same backend (distinguished by routing keys and unique listener ports). A smoke test verifies functionality on one service; readiness checks validate the full set.
+
+## Structure
+
+```
+service-scale/
+├── inventory/
+│   ├── hosts.yml
+│   ├── group_vars/
+│   │   └── all.yml
+│   └── host_vars/
+│       ├── west.yml
+│       └── east.yml
+├── resources/
+│   ├── west/
+│   │   └── site.yml
+│   └── east/
+│       ├── site.yml
+│       └── backend.yml
+└── test.yml
+```
+
+## Parameters (defaults in `inventory/group_vars/all.yml`)
+
+- `service_count`: number of Listener/Connector pairs
+- `service_name_prefix` (default: `svc`): service/CR name prefix
+- `routing_key_prefix` (default: `svc`): routing key prefix
+- `base_listener_port` (default: 10080): port base for west Listeners (`base + i`)
+- `backend_app_label` (default: `backend`): label selector for backend pods
+- `backend_port` (default: 8080): backend container port
+- `smoke_test_index` (default: 1): which service to curl
+- `ready_retries`/`ready_delay`: readiness polling
+
+To override, update `inventory/group_vars/all.yml` or pass `-e var=value`.
+
+## Acceptance Criteria
+
+- Functional:
+  - All `service_count` Connectors and Listeners reach status “Ready”.
+  - Smoke request from `west` to `svc-<smoke_test_index>` returns success (via `e2e.tests.run_curl`).
+- Non-functional:
+  - All resources become Ready within the allotted retries/delay window (configurable via `ready_retries` and `ready_delay`).
+
+## Prerequisites
+
+- Skupper v2 controller installed cluster-wide
+- Two accessible Kubernetes contexts (west/east) or a single cluster with both namespaces
+- `kubeconfig` paths set in `inventory/host_vars/west.yml` and `inventory/host_vars/east.yml`
+
+## Run
+
+From `skupper/tests`:
+
+```bash
+make create-venv FORCE=true
+make test TEST="service-scale"
+```
+
+Override scale:
+
+```bash
+make test TEST="service-scale" EXTRA_VARS="-e service_count=500 -e ready_retries=900 -e ready_delay=2"
+```
+
+Skip teardown:
+
+```bash
+make test TEST="service-scale" EXTRA_VARS="-e skip_teardown=true"
+```
+
+## Notes
+
+- All services route to the same backend Deployment on `east`. This validates control-plane scale without multiplying app pods.
+- Each Listener uses a unique port (`base_listener_port + i`) and unique `routingKey` (`svc-i`).
+

tests/e2e/scenarios/service-scale/inventory/group_vars/all.yml

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+---
+ansible_connection: local
+ansible_user: "{{ lookup('env', 'USER') }}"
+debug: false
+namespace_prefix: "e2e"
+generate_namespaces_namespace_label: "service-scale"
+
+service_count: 50
+service_name_prefix: "svc"
+routing_key_prefix: "svc"
+
+base_listener_port: 10080
+
+backend_app_label: "backend"
+backend_port: 8080
+
+smoke_test_index: 1
+
+ready_retries: 0
+ready_delay: 5
+
+validate_all: false
+validation_sample_size: 1
+
+use_dynamic_creation: true
+
+skip_teardown: true

tests/e2e/scenarios/service-scale/inventory/host_vars/east.yml

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+---
+# Kubeconfig path for east site
+kubeconfig_2: "{{ ansible_env.HOME }}/.kube/config"
+kubeconfig: "{{ kubeconfig_2 }}"
+
+# Namespace configuration
+namespace_name: service-scale-east
+

tests/e2e/scenarios/service-scale/inventory/host_vars/west.yml

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+---
+# Kubeconfig path for west site
+kubeconfig_1: "{{ ansible_env.HOME }}/.kube/config"
+kubeconfig: "{{ kubeconfig_1 }}"
+
+# Namespace configuration
+namespace_name: service-scale-west
+
+# Run curl configuration
+run_curl_namespace: default
+run_curl_image: "{{ skupper_test_images_lanyard }}"
+run_curl_pod_name: curl-test
+run_curl_retries: 30
+run_curl_delay: 6

tests/e2e/scenarios/service-scale/inventory/hosts.yml

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+---
+all:
+  hosts:
+    west:
+    east:
+

tests/e2e/scenarios/service-scale/resources/east/backend.yml

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+---
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: backend
+  labels:
+    app: backend
+spec:
+  selector:
+    matchLabels:
+      app: backend
+  replicas: 3
+  template:
+    metadata:
+      labels:
+        app: backend
+    spec:
+      containers:
+        - name: backend
+          image: quay.io/skupper/hello-world-backend
+          ports:
+            - containerPort: 8080
+

tests/e2e/scenarios/service-scale/resources/east/site.yml

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+---
+apiVersion: skupper.io/v2alpha1
+kind: Site
+metadata:
+  name: east
+spec:
+  linkAccess: default

tests/e2e/scenarios/service-scale/resources/west/site.yml

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+---
+apiVersion: skupper.io/v2alpha1
+kind: Site
+metadata:
+  name: west
+spec:
+  linkAccess: default
+

tests/e2e/scenarios/service-scale/skupper-sites.yml

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+---
+- name: Apply full resources directory (static mode)
+  skupper.v2.resource:
+    path: "{{ playbook_dir }}/resources/{{ site_name }}/"
+    namespace: "{{ namespace_prefix }}-{{ namespace_name }}"
+    kubeconfig: "{{ kubeconfig }}"
+  when:
+    - not (use_dynamic_creation | default(false) | bool)
+
+- name: Apply site (and backend on east) only (dynamic mode)
+  skupper.v2.resource:
+    path: "{{ item }}"
+    namespace: "{{ namespace_prefix }}-{{ namespace_name }}"
+    kubeconfig: "{{ kubeconfig }}"
+  with_items:
+    - "{{ playbook_dir }}/resources/{{ site_name }}/site.yml"
+    - "{{ (playbook_dir ~ '/resources/' ~ site_name ~ '/backend.yml') if (site_name == 'east') else omit }}"
+  when:
+    - use_dynamic_creation | default(false) | bool
+