Imagine a FinTech company (like a bank or payment platform) running critical apps.
They need:
- Security 🔒
- High Availability 🏢
- Scalability 📈
- CI/CD automation 🛠
- Multi-cloud disaster recovery 🌎
- Monitoring and compliance 📊
They deploy OpenShift 4.14 like this:
🧩 Architecture Diagram (High Level)
+--------------------------+
| External Clients |
+--------------------------+
|
↓
Load Balancer (F5/AWS ALB)
|
↓
+---------------------------------+
| OpenShift 4.14 Cluster |
| (3 Master + 6 Worker Nodes HA) |
+---------------------------------+
|
+---------+---------+---------+---------+---------+
| | | | | |
Core Apps Microservices Monitoring GitOps/CD Storage
(e.g., API, (Payments, (Prometheus, (ArgoCD, (Ceph, EBS,
Billing UI) Notifications) Grafana) Tekton) NetApp)
🔥 Infrastructure Components
| Layer | Details |
|---|---|
| OpenShift Platform | OpenShift 4.14 running on AWS EC2 (or Bare Metal, Azure, GCP) |
| Masters | 3 Control Plane nodes (HA) |
| Infra Nodes | 2 nodes dedicated for ingress, monitoring, and registry |
| Worker Nodes | 4+ nodes running application workloads |
| Storage | EBS for dynamic PVCs, Ceph for persistent apps, S3 object storage |
| Backup | Velero for backup and recovery |
| Networking | OVN-Kubernetes CNI, secured Ingress, firewall/VPC |
🛠 What Happens Inside the Cluster
| Area | Description |
|---|---|
| Internal Image Registry | Apps built in CI pipelines are pushed here |
| ImageStreams | Track versions of app images (dev ➔ staging ➔ prod) |
| CI/CD Pipelines | Tekton Pipelines build, test, and deploy automatically |
| GitOps | ArgoCD monitors Git Repos and auto-syncs deployments |
| Monitoring | Built-in Prometheus, Grafana, AlertManager |
| Logging | Loki stack or EFK (Elasticsearch, Fluentd, Kibana) |
| Operators | Certified operators installed for databases (Postgres, Mongo), monitoring, and security |
| Security | SCCs enforced, Pod Security Admission, OAuth with SSO (Keycloak), network policies applied |
| TLS everywhere | All apps exposed externally use Let’s Encrypt or company-provided TLS certificates via Ingress Controller |
| Service Mesh (optional) | Istio/Red Hat Service Mesh for complex apps needing traffic routing, retries, circuit breaking |
📦 Application Lifecycle
| Stage | What Happens |
|---|---|
| Dev Commit Code | Developer pushes code to GitHub/GitLab |
| CI Build | Tekton triggers build, builds container image |
| Push to Dev | Image pushed to internal OpenShift registry, deployed to app-dev project |
| Promote to Staging | After tests pass, ImageStream tag promoted to app-staging |
| Promote to Prod | Approval step (manual or automatic) ➔ ImageStream tag promoted to app-prod |
| Monitoring Alerts | Prometheus tracks app metrics, AlertManager sends Slack/email alerts if thresholds are breached |
🌐 External Access
- OpenShift Ingress Controller (based on HAProxy) manages incoming traffic.
- Load Balancer (e.g., AWS ALB) in front distributes traffic across multiple router pods.
- Routes expose services securely (HTTPS, TLS termination at edge).
Example public routes:
| App | Route |
|---|---|
| API Gateway | https://api.example.com |
| Billing App | https://billing.example.com |
| Admin Dashboard | https://admin.example.com |
🔒 Security and Compliance Setup
| Area | OpenShift Feature Used |
|---|---|
| Authentication | OAuth server integrated with SSO (Keycloak/LDAP) |
| Authorization | Role-based access control (RBAC) by projects/namespaces |
| Network Security | OpenShift NetworkPolicy to isolate apps |
| Pod Security | SCCs (Security Context Constraints) enforced |
| Vulnerability Scanning | Quay Clair or Prisma Cloud scans container images |
| Compliance | OpenShift Compliance Operator runs CIS Benchmarks, PCI scans |
📈 Real Company Example Flow
Developer commits code ➔
Tekton builds & tests ➔
ArgoCD deploys to dev ➔
QA tests ➔
Promotion via ImageStream ➔
ArgoCD syncs to production ➔
Prometheus monitors everything ➔
AlertManager informs on failures
✅ Minimal human error
✅ Rollbacks easy (previous image tags exist)
✅ Full GitOps-driven deployments
✅ Multi-cloud flexibility (AWS, Azure, GCP)
🎯 Conclusion: Why Companies Use OpenShift 4.14
| Reason | Explanation |
|---|---|
| Enterprise-ready Kubernetes | Certified platform with support |
| Security first | Built-in SCC, OAuth, Compliance tools |
| Automation native | GitOps, Pipelines, Operator Framework |
| Multi-cloud / hybrid cloud | ROSA, ARO, or on-premises |
| Easy cluster upgrades | Over-the-air OpenShift upgrades |
| Developer happiness | Great GUI console, developer tools |
📋 Bonus: Technology Stack in This Company
| Stack | Tools |
|---|---|
| CI/CD | Tekton Pipelines, ArgoCD |
| Monitoring | Prometheus, Grafana |
| Logging | Loki or EFK |
| Storage | EBS, Ceph, S3 |
| Service Mesh (optional) | Istio/Red Hat Service Mesh |
| SSO | Keycloak, LDAP |
| Database | Operators for Postgres, MongoDB |
| Security | Quay Clair, Prisma Cloud, SCCs, Compliance Operator |
🚀 That’s the Real World!
✅ OpenShift is NOT “just Kubernetes” — it’s Kubernetes plus everything companies need to run safely and scale.
✅ OpenShift 4.14 keeps getting closer to pure Kubernetes, but still adds the real-world enterprise features Kubernetes users have to stitch together manually.
I’m Rajesh Kumar, a DevOps, SRE, DevSecOps, Cloud, and Platform Engineering expert passionate about sharing practical knowledge, real-world experiences, and industry best practices. I have worked at Cotocus and regularly write about technology, travel, investing, health, product reviews, and digital marketing through my various platforms.
I publish technical articles at DevOps School, travel stories at Holiday Landmark, stock market insights at Stocks Mantra, health and fitness guidance at My Medic Plus, product reviews at TrueReviewNow, and SEO and digital marketing strategies at Wizbrand.
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