Add clean,deploy and port-forward scripts and values for Jaeger + OpenSearch + OTel Demo (#7516)

## Which problem is this PR solving?
part of mentorship work 
- #7326

## Description of the changes
Summary
This PR introduces a complete, repeatable deployment for the
OpenTelemetry Demo with Jaeger , HotROD app and OpenSearch (including
Dashboards) under examples/otel-demo. It provides a single entrypoint
script that supports both upgrade and clean install modes, plus the
necessary Helm values and a ClusterIP service for Jaeger Query.

Deployment script 

• Added deploy-all.sh with modes: upgrade (default) and clean (uninstall
+ fresh install)
◦ Pre-flight checks for required CLIs (bash, git, curl, kubectl, helm)
and cluster availability
◦  Validates presence of required values files
◦  Clones jaegertracing/helm-charts v2 and builds dependencies
◦ Deploys in order: OpenSearch -> OpenSearch Dashboards -> Jaeger
(all-in-one) -> OTel Demo
◦ Waits for StatefulSets/Deployments to be ready with rollout status and
timeouts
◦  Creates a dedicated ClusterIP service for Jaeger Query


Added values files:

◦  opensearch-values.yaml
◦  opensearch-dashboard-values.yaml
◦  jaeger-values.yaml
◦  jaeger-config.yaml (userconfig for Jaeger)
◦  otel-demo-values.yaml
•  Added Jaeger Query service:
◦  jaeger-query-service.yaml (ClusterIP service in jaeger namespace)


## How was this change tested?
- Tested in Local Minikube Cluster as well as production Oracle Cluster 

## Checklist
- [x] I have read
https://github.com/jaegertracing/jaeger/blob/master/CONTRIBUTING_GUIDELINES.md
- [x] I have signed all commits
- [x] I have added unit tests for the new functionality
- [x] I have run lint and test steps successfully
  - for `jaeger`: `make lint test`
  - for `jaeger-ui`: `npm run lint` and `npm run test`

---------

Signed-off-by: danish9039 <[email protected]>
Signed-off-by: hippie-danish <[email protected]>
Co-authored-by: graphite-app[bot] <96075541+graphite-app[bot]@users.noreply.github.com>

Author: danish9039

examples/otel-demo/README.md

@@ -0,0 +1,100 @@
+# OpenTelemetry Demo app + HotRODapp + Jaeger + OpenSearch 
+
+This example provides a one-command deployment of a complete observability stack on Kubernetes:
+- Jaeger (all-in-one) for tracing
+- OpenSearch and OpenSearch Dashboards
+- OpenTelemetry Demo application (multi-service web store)
+- HotRod application
+
+It is driven by `deploy-all.sh`, which supports both clean installs and upgrades.
+
+## Prerequisites
+- Kubernetes cluster reachable via `kubectl`
+- Installed CLIs: `bash`, `git`, `curl`, `kubectl`, `helm`
+- Network access to Helm repositories
+
+## Quick start
+- Clean install (removes previous releases/namespaces, then installs everything):
+```bash path=null start=null
+./deploy-all.sh clean
+```
+- Upgrade (default) — installs if missing, upgrades if present:
+```bash path=null start=null
+./deploy-all.sh
+# or explicitly
+./deploy-all.sh upgrade
+```
+- Specify Jaeger all-in-one image tag:
+```bash path=null start=null
+./deploy-all.sh upgrade <image-tag>
+# Example
+./deploy-all.sh upgrade latest
+```
+
+Environment variables:
+- ROLLOUT_TIMEOUT: rollout wait timeout in seconds (default 600)
+
+```bash path=null start=null
+ROLLOUT_TIMEOUT=900 ./deploy-all.sh clean
+```
+
+## What gets deployed
+- Namespace `opensearch`:
+  - OpenSearch (single node) StatefulSet
+  - OpenSearch Dashboards Deployment
+- Namespace `jaeger`:
+  - Jaeger all-in-one Deployment (storage=none)
+  - HOTROD application 
+  - Jaeger Query ClusterIP service (jaeger-query-clusterip)
+- Namespace `otel-demo`:
+  - OpenTelemetry Demo (frontend, load-generator, and supporting services)
+  
+
+## Verifying the deployment
+- Pods status:
+```bash path=null start=null
+kubectl get pods -n opensearch
+kubectl get pods -n jaeger
+kubectl get pods -n otel-demo
+```
+- Services:
+```bash path=null start=null
+kubectl get svc -n opensearch
+kubectl get svc -n jaeger
+kubectl get svc -n otel-demo
+```
+
+
+## Automatic port-forward using scrpit
+ - OpenSearch Dashboards:
+```bash path=null start=null
+./start-port-forward.sh
+
+
+## Customization
+- Helm values provided in this directory:
+  - `opensearch-values.yaml`
+  - `opensearch-dashboard-values.yaml`
+  - `jaeger-values.yaml`
+  - `jaeger-config.yaml`
+  - `otel-demo-values.yaml`
+  - `jaeger-query-service.yaml`
+
+You can adjust these files and re-run `./deploy-all.sh upgrade` to apply changes.
+
+## Clean-up
+- Clean uninstall using cleanup.sh :
+```bash path=null start=null
+./cleanup.sh
+```
+- Manual teardown:
+```bash path=null start=null
+helm uninstall opensearch -n opensearch || true
+helm uninstall opensearch-dashboards -n opensearch || true
+helm uninstall jaeger -n jaeger || true
+helm uninstall otel-demo -n otel-demo || true
+kubectl delete namespace opensearch jaeger otel-demo --ignore-not-found=true
+```
+
+
+

examples/otel-demo/cleanup.sh

@@ -0,0 +1,89 @@
+#!/bin/bash
+
+# Copyright (c) 2025 The Jaeger Authors.
+# SPDX-License-Identifier: Apache-2.0
+
+# OpenSearch Observability Stack Cleanup Script 
+
+main() {
+  echo "Starting OpenSearch Observability Stack Cleanup"
+
+  # Stop any existing port forwards
+  echo "Stopping any existing port-forward processes..."
+  pkill -f "kubectl port-forward" 2>/dev/null || true
+  echo "✅ Port-forward processes stopped"
+
+  # Uninstall OTEL Demo
+  echo " Uninstalling OTEL Demo..."
+  if helm list -n otel-demo | grep -q otel-demo; then
+    helm uninstall otel-demo -n otel-demo
+    echo "✅ OTEL Demo uninstalled"
+  else
+    echo "⚠️ OTEL Demo not found or already uninstalled"
+  fi
+
+  # Uninstall Jaeger
+  echo "Uninstalling Jaeger..."
+  if helm list -n jaeger | grep -q jaeger; then
+    helm uninstall jaeger -n jaeger
+    echo "✅ Jaeger uninstalled"
+  else
+    echo "⚠️ Jaeger not found or already uninstalled"
+  fi
+
+  # Uninstall OpenSearch Dashboards
+  echo "Uninstalling OpenSearch Dashboards..."
+  if helm list -n opensearch | grep -q opensearch-dashboards; then
+    helm uninstall opensearch-dashboards -n opensearch
+    echo "✅ OpenSearch Dashboards uninstalled"
+  else
+    echo "⚠️ OpenSearch Dashboards not found or already uninstalled"
+  fi
+
+  # Uninstall OpenSearch
+  echo " Uninstalling OpenSearch..."
+  if helm list -n opensearch | grep -q opensearch; then
+    helm uninstall opensearch -n opensearch
+    echo "✅ OpenSearch uninstalled"
+  else
+    echo "⚠️ OpenSearch not found or already uninstalled"
+  fi
+
+  # Wait for pods to terminate
+  echo "Waiting for pods to terminate..."
+  sleep 10
+
+  # Delete namespaces
+  echo "Deleting namespaces..."
+  for ns in otel-demo jaeger opensearch; do
+    if kubectl get namespace "$ns" > /dev/null 2>&1; then
+      kubectl delete namespace "$ns" --force --grace-period=0 2>/dev/null || true
+      echo "✅ Namespace $ns deleted"
+    else
+      echo "⚠️ Namespace $ns not found or already deleted"
+    fi
+  done
+
+  # Clean up any remaining resources (PVCs, etc.)
+  echo "Cleaning up any remaining PVCs..."
+  kubectl get pvc -A | grep -E "(opensearch|jaeger|otel-demo)" || echo "No remaining PVCs found"
+
+  # Final verification
+  echo "Performing final verification..."
+  remaining_pods=$(kubectl get pods -A | grep -E "(opensearch|jaeger|otel-demo)" || true)
+  if [ -z "$remaining_pods" ]; then
+    echo "All components cleaned up successfully!"
+  else
+    echo "⚠️ Some pods may still be terminating:"
+    echo "$remaining_pods"
+    echo "This is normal and they should disappear shortly"
+  fi
+
+  echo ""
+  echo "✅ Cleanup Complete!"
+  echo ""
+  echo " All OpenSearch observability stack components have been removed"
+  echo ""
+}
+
+main "$@"