A CORPOLEARN SPECIALIST SCHOOL

Preparing systems and incident trade-offs

✦ –target=KUBERNETES-LINUX-SRE ✦ ✦ –blueprints=500-INTERVIEW-QAS ✦

Master Kubernetes, Linux Kernel, Infrastructure as Code & Observability

Deploy production-grade Platform Engineering, SRE Architecture, eBPF Telemetry, and ace CKA/CKS DevOps Certifications.

$ kubectl get architecture cat blueprints.yaml →
user@platformops-master:~$ kubectl get pods -n platformops-academy
● ONLINE
NAME READY STATUS RESTARTS AGE
k8s-architecture-guide-7f89d 1/1 Running 0 1m
linux-kernel-tuning-mastery-4b21a 1/1 Running 0 3m
terraform-opentofu-blueprint-9c12b 1/1 Running 0 5m
ebpf-telemetry-tracing-3e88f 1/1 Running 0 12m
$ systemctl status platformops.service –active
Practice
SRE & Kube Interview Q&As
ONLINE
Design
IaC & GitOps Blueprints
SYNCED
Open
Independent Learning
ACTIVE
Evidence
Independent Preparation
REVIEWED
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✦ PLATFORMOPS DOMAINS ✦

Explore PlatformOps Technology Domains

Production architectures, interview blueprints, and terminal step-by-step guides categorized across 12 core Linux & Cloud Native disciplines.

~/domains/linux-sysadmin

POSIX, Systemd, Kernel Tuning, Memory Management, eBPF & Shell Scripting.

~/domains/kubernetes

Kube Control Plane, CNI/CSI, Pod Lifecycle, RBAC, CRDs & Helm Charts.

~/domains/iac

Terraform, OpenTofu, Pulumi, Ansible & State Drift Management.

~/domains/sre

SLOs/SLAs, Error Budgets, Incident Management & Chaos Mesh.

~/domains/observability

Prometheus, Grafana, OpenTelemetry, Jaeger Tracing & Loki Logs.

~/domains/cicd-gitops

ArgoCD, FluxCD, GitHub Actions, Pipeline Security & Canary Deployments.

~/domains/cloud

AWS/GCP Native Services, Multi-Cloud IAM & FinOps Cost Optimization.

~/domains/devsecops

Container Scanning, OPA Gatekeeper, Kyverno, HashiCorp Vault & Zero Trust.

~/domains/service-mesh

Istio, Cilium eBPF, Linkerd, Ingress Controllers & Envoy Proxy.

~/domains/storage
Cloud Native Storage & DBs
$ persistent-volume

Cloud Native Storage & DBs

Rook-Ceph, StatefulSets, Persistent Volumes & Cloud-Native DB Operators.

~/domains/platform-eng

Internal Developer Platforms (IDPs), Backstage & Self-Service Portals.

~/domains/certifications

Independent CKA, CKAD, CKS, LFCS, and DevOps certification study guides.

✦ DEVOPS CI/CD PIPELINE ROADMAP ✦

PlatformOps Certification & Career Path

Follow our 3-stage continuous learning pipeline to progress from Linux SysAdmin to Certified Kubernetes Security Specialist (CKS).

STAGE 01: BUILD
PASSED
$ pipeline –stage=foundation

Stage 1: Linux & SysAdmin Fundamentals

Master Bash scripting, POSIX standards, systemd units, storage management, and prepare for the LFCS (Linux Foundation Certified SysAdmin) exam.

  • ✓ Kernel Parameter Tuning
  • ✓ Process Isolation & Cgroups v2
  • ✓ Shell Automation Scripts
STAGE 02: TEST
RUNNING
$ pipeline –stage=orchestration

Stage 2: Kubernetes & IaC Specialist

Construct production clusters with Terraform/OpenTofu and master multi-container deployment architecture for CKA (Certified Kubernetes Administrator).

  • ✓ Multi-Control Plane Setup
  • ✓ Terraform State & Drift Control
  • ✓ Helm Charts & Kube RBAC
STAGE 03: DEPLOY
READY
$ pipeline –stage=sre-security

Stage 3: SRE & Security Architect

Implement Cilium eBPF packet routing, OpenTelemetry tracing, OPA policy enforcement, and earn CKS (Certified Kubernetes Security Specialist).

  • ✓ eBPF Micro-segmentation
  • ✓ OpenTelemetry & Grafana Stack
  • ✓ OPA Gatekeeper & Kyverno
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✦ HAND-PICKED TECHNICAL GUIDES ✦

Featured Production Architecture Guides

View All Guides →
~/guides/k8s-architecture.md
Kubernetes & Containers Interview Q&A

25 Essential Kubernetes Architecture & Troubleshooting Interview Questions

Master Control Plane components, API Server rate limiting, kubelet heartbeat intervals, ETCD quorum recovery, and CNI packet loss diagnostics.

12 min read cat guide.md →
~/guides/iac-comparison.md
Infrastructure as Code

Terraform vs OpenTofu vs Pulumi: Production IaC Comparison & Best Practices

Comprehensive breakdown of state locking, concurrency locks, state migration from BSL to MPL, and programming language IaC paradigms.

15 min read cat guide.md →
~/guides/linux-memory.md
Linux Kernel & SysAdmin

Deep Dive into Linux Kernel Memory Management and Cgroups v2

Understanding Virtual Memory, OOM Killer thresholds, swapness tuning, and cgroups v2 unified hierarchy controller limits.

10 min read cat guide.md →
✦ PRODUCTION YAML MANIFEST BLUEPRINTS ✦

Platform Architecture YAML Blueprints

Production-tested Kubernetes manifests, Cilium eBPF network policies, and OpenTelemetry collector configs ready for deployment.

cilium-ebpf-mesh.yaml
v1.14.0
1 | apiVersion: cilium.io/v2
2 | kind: CiliumNetworkPolicy
3 | metadata:
4 | name: zero-trust-ebpf-egress
5 | spec:
6 | endpointSelector:
7 | matchLabels: {app: payment-service}
8 | egress:
9 | – toPorts: [{ports: [{port: “443”}]}]

Multi-Cluster Cilium eBPF Mesh

High performance kernel-level packet routing with zero-trust L7 security policies.

argocd-gitops-app.yaml
v2.9.2
1 | apiVersion: argoproj.io/v1alpha1
2 | kind: Application
3 | metadata:
4 | name: platformops-prod-us-east
5 | spec:
6 | destination: {server: https://k8s.prod}
7 | source:
8 | repoURL: https://github.com/org/infra
9 | targetRevision: HEAD

GitOps CD with ArgoCD & OpenTofu

Automated continuous delivery pipeline with self-healing drift detection.

otel-collector-config.yaml
v0.92.0
1 | receivers:
2 | otlp:
3 | protocols: {grpc: {}, http: {}}
4 | processors:
5 | batch: {timeout: 1s, send_batch_size: 8192}
6 | exporters:
7 | prometheusremotewrite:
8 | endpoint: http://prometheus:9090/push
9 | jaeger: {endpoint: jaeger:14250}

OpenTelemetry, Prometheus & Jaeger

Full-stack observability collector configuration for metrics, logs, and distributed traces.

✦ CKA / CKS & SRE INTERVIEW PREP ✦

Top PlatformOps Interview Questions & Detailed Answers

Real-world scenario questions asked during Senior SRE, Principal DevOps, and Cloud Architect technical interviews.

>_ QUESTION #01 // KUBERNETES CONTROL PLANE CKA EXAM FAVORITE

Q: How does Kubernetes handle ETCD quorum loss during control plane network partitioning?

ETCD uses the Raft consensus algorithm requiring a majority quorum of (N/2) + 1 nodes to accept writes. In a 3-node cluster, 2 nodes must agree. If a partition leaves 1 node isolated, it refuses write requests with Error 503: leader lost while read operations might return stale data unless linearizable reads are explicitly requested.

$ etcdctl endpoint status –write-out=table // Check leader election & raftIndex
>_ QUESTION #02 // LINUX KERNEL & CGROUPS SENIOR SRE ROLE

Q: What is the technical difference between Cgroups v1 and Cgroups v2 memory limit enforcement?

Cgroups v1 used orthogonal controller hierarchies where memory.limit_in_bytes immediately invoked OOM Killer when hard limit was reached. Cgroups v2 introduces a unified single-hierarchy tree with memory.min (protected memory), memory.low (best-effort protection), and memory.high (throttles processes before triggering OOM killer).

$ cat /sys/fs/cgroup/memory.current // Query unified cgroups v2 active usage
>_ QUESTION #03 // TERRAFORM & OPENTOFU IAC DEEP DIVE

Q: How do you recover from a corrupted Terraform state lock in AWS S3 / DynamoDB?

When a process terminates abruptly, DynamoDB retains the lock ID. First verify no active CI/CD pipeline is mutating state, then copy the Lock ID string from error stdout and execute force-unlock:

$ terraform force-unlock <LOCK-ID-UUID-STRING> -force
~/career/mock-interview.sh –provider=corpolearn
SHARED SERVICE
✦ CORPOLEARN MOCK INTERVIEWS ✦

Practise your PlatformOps & SRE interview with a role-aligned interviewer.

Select your target domain, candidate level, verified SRE/DevOps interviewer, and available session time through one central CorpoLearn account.

STEP 01

Choose your focus

Select your PlatformOps discipline — Linux Kernel, Kubernetes Control Plane, Terraform IaC, eBPF Telemetry, or CKA/CKS exam prep.

STEP 02

Practise live

Engage in a focused 1-on-1 technical mock session with real-time terminal troubleshooting and architecture trade-offs.

STEP 03

Improve deliberately

Receive actionable post-interview feedback on system design, CLI commands, incident response, and evidence-based answers.

✓ Centralized Account • ✓ Verified SRE Profiles • ✓ Structured Practice
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✦ PLATFORMOPS WEEKLY DIGEST ✦

Subscribe to Weekly Architecture Blueprints

Get Kubernetes examples, eBPF packet-trace walkthroughs, and independent CKA/CKS practice scenarios.

🔒 Zero spam. Unsubscribe anytime. 40,000+ DevOps engineers subscribed.
✦ RECENT TERMINAL PUBLICATIONS ✦

Latest Articles & Platform Operations Guides

Freshly published Linux SysAdmin scripts, Kubernetes network policies, and DevSecOps security tutorials.

✦ FREQUENTLY ASKED QUESTIONS ✦

PlatformOps School FAQ & Learning Guide

Everything you need to know about our CKA/CKS prep materials, hands-on Linux labs, and production architecture blueprints.

$ faq –query=”Are the CKA and CKS exam practice questions up-to-date for 2026?” +

Yes! All our CKA, CKAD, and CKS exam scenarios are updated monthly to reflect the latest Kubernetes release (v1.31+) and Linux Foundation curriculum specifications, including Cilium CNI, OPA Gatekeeper, and containerd runtime debugging.

$ faq –query=”Do I need a paid cloud account to follow the Terraform & Kubernetes blueprints?” +

No. All our tutorials include local setup instructions using Kind (Kubernetes in Docker), Minikube, K3s, and LocalStack or Terraform local file providers so you can build and test complete topologies offline on your local machine without incurring cloud bills.

$ faq –query=”How do I submit my own SRE post-mortem or IaC blueprint?” +

We welcome community contributions! You can submit your anonymized incident post-mortems, Helm chart blueprints, or OpenTelemetry configurations via our GitHub pull request pipeline. Approved submissions earn a featured author badge and SRE community badge.

ROLE-SPECIFIC PRACTICE · POWERED BY CorpoLearn

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