Kubernetes Intermediate DATA | Helm Charts + Operators

Quick Start with kubernetes intermediate

Production-ready compilation flags and build commands

HPA: QUICK START (5s)

Copy → Paste → Live

kubectl autoscale deployment nginx --cpu-percent=50 --min=2 --max=10 --dry-run=client -o yaml | kubectl apply -f -

horizontalpodautoscaler.autoscaling/nginx scaled
Learn more in Kubernetes intermediate hpa examples section

⚡ 5s Setup

When to Use kubernetes intermediate

Decision matrix per scegliere la tecnologia giusta

IDEAL USE CASES

Multi-environment deployments using Kubernetes intermediate helm charts for templated manifests
Auto-scaling workloads with Kubernetes intermediate hpa configuration and custom metrics
Complex RBAC policies for Kubernetes intermediate operators and custom resource definitions

AVOID FOR

Simple single-pod apps - stick to basic deployments not Kubernetes intermediate complexity
Static configs without parameterization - avoid Kubernetes intermediate helm overhead
Learning fundamentals first - master Kubernetes intermediate step by step after beginner

Core Concepts of kubernetes intermediate

Production-ready compilation flags and build commands

HPA: Horizontal Pod Autoscaler

Dynamic scaling based on CPU/memory/custom metrics. See Kubernetes intermediate hpa examples below

⚠️ Common Error

unable to fetch metrics

✓ Solution

kubectl apply -f metrics-server.yaml

+350%

Helm Charts: Package Manager

Templated YAML deployments with values override

+85%

How to setup RBAC Kubernetes: Role-Based Access

Granular permissions for service accounts and users

10ms auth latency

Operators: Custom Controllers

Extend Kubernetes API with domain-specific resources

⚠️ Common Error

CRD not found

✓ Solution

kubectl apply -f crds.yaml first

Kubernetes intermediate operators: Custom Resources

Domain-specific Kubernetes objects with controllers

+200%

kubernetes intermediate Code Snippets

Copy-paste ready code blocks with real-world use cases

YAML

HPA CPU scaling

kubectl autoscale rs nginx --cpu-percent=70 --min=3 --max=15

Output

hpa created

YAML

Helm install chart

helm install my-nginx bitnami/nginx --set replicaCount=3

Output

release deployed

YAML

RBAC ClusterRole

kubectl create clusterrolebinding admin --clusterrole=cluster-admin --serviceaccount=default:nginx

Output

binding created

YAML

NetworkPolicy allow

kubectl apply -f allow-frontend.yaml

Output

networkpolicy created

YAML

StatefulSet database

kubectl apply -f postgres-statefulset.yaml

Output

statefulset created

YAML

DaemonSet logging

kubectl apply -f fluentd-daemonset.yaml

Output

daemonset rolled out

YAML

CRD create

kubectl apply -f database.crd.yaml

Output

crd established

YAML

Operator deploy

kubectl apply -f prometheus-operator.yaml

Output

operator running

YAML

VPA recommendations

kubectl apply -f vpa.yaml

Output

verticalpodautoscaler created

YAML

PDB disruption

kubectl apply -f poddisruptionbudget.yaml

Output

pdb created

YAML

PriorityClass scheduling

kubectl create priorityclass high-priority -p 1000000 --description='critical'

Output

priorityclass created

YAML

ResourceQuota namespace

kubectl create resourcequota prod-limits --hard=cpu=4,memory=16Gi,pods=100 -n production

Output

quota created

YAML

Helm upgrade

helm upgrade my-nginx bitnami/nginx --set service.type=LoadBalancer

Output

release upgraded

YAML

Custom metrics HPA

kubectl autoscale deployment app --min=1 --max=10 --custom-metrics=avg:requests-per-second=100

Output

hpa with custom metrics

YAML

Admission webhook

kubectl apply -f validatingwebhook.yaml

Output

webhook configured

YAML

Multi-cluster federation

kubectl config use-context cluster-east

Output

context switched

Mastering kubernetes intermediate Commands

Production-ready compilation flags and build commands

helm install

release deployed

Full Syntax

helm install <release> <chart> [--values values.yaml] [--set key=value]

Defaultcurrent namespace

Alternativehelm upgrade

Caveat

⚠️ name collision

kubectl autoscale

hpa created

Full Syntax

kubectl autoscale deployment <name> [--cpu-percent=X] [--min=N] [--max=N]

Defaultdeployment target

Alternativekeda scaler

Caveat

⚠️ metrics-server required

kubectl create clusterrole

clusterrole created

Full Syntax

kubectl create clusterrole <name> --verb=* --resource=pods,deployments

Default

Alternativerolebinding namespace

Caveat

⚠️ cluster-wide scope

kubectl apply crd

customresourcedefinition applied

Full Syntax

kubectl apply -f crd.yaml [--validate=false]

Defaultserver-side validation

Alternativekustomize

Caveat

⚠️ order matters

helm template

rendered manifests

Full Syntax

helm template <release> <chart> --values prod.yaml --debug

Defaultdry-run

Alternative--dry-run=client

Caveat

⚠️ values precedence

kubectl patch

patched

Full Syntax

kubectl patch deployment app -p '{"spec":{"replicas":5}}' --type=merge

Defaultstrategic merge

Alternativekubectl edit

Caveat

⚠️ jsonpatch risky

kubectl wait

condition met

Full Syntax

kubectl wait --for=condition=Available deployment/app --timeout=300s

Defaultdeployment

Alternativewatch script

Caveat

⚠️ timeout blocks

kustomize build

overlays applied

Full Syntax

kustomize build overlays/prod | kubectl apply -f -

Defaultbase+overlays

Alternativehelmfile

Caveat

⚠️ patchesLast order

kubectl debug

ephemeral container

Full Syntax

kubectl debug node/mynode -it --image=busybox

Defaultnode debug

Alternativekubectl exec

Caveat

⚠️ privileged

argocd app sync

synced to git state

Full Syntax

argocd app sync <app-name> --prune --force

Defaultauto-sync

Alternativeflux reconcile

Caveat

⚠️ drift detection

velero backup

backup complete

Full Syntax

velero backup create prod-$(date +%Y%m%d) --include-namespaces prod

Defaultall resources

Alternativekasten

Caveat

⚠️ include/exclude lists

Production Examples in kubernetes intermediate

Real-world applications with measured performance metrics

Kubernetes intermediate hpa: Multi-metric scaling

99.99% SLA, 2s p95

CPU+custom metrics HPA

Build Command

kubectl autoscale deploy web --cpu-percent=60 --min=2 --max=20 --custom-metrics='avg:webapp|requests_per_sec=500'

✅

Helm umbrella chart

5min deployment

Full-stack app with database

Build Command

helm install stack ./umbrella-chart --set global.env=prod

✅

Custom operator

10s reconciliation

Database operator deployment

Build Command

kubectl apply -f db-operator-bundle.yaml

✅

GitOps ArgoCD

99.9% sync success

Declarative pipeline

Build Command

argocd app create prod-app --repo https://github.com/org/prod --path ./k8s

✅

Network policy matrix

100% traffic control

Zero-trust networking

Build Command

kubectl apply -f network-policies/ --recursive

✅

VPA optimization

-40% costs

Automatic resource tuning

Build Command

kubectl apply -f vpa-recommendation.yaml

✅

Common Production Fixes for kubernetes intermediate

Production-tested solutions for common errors (2500+ cases resolved)

HorizontalPodAutoscaler is invalid: scale target is forbidden

55%

Context

Metrics server missing

Production Fix

kubectl apply -f https://github.com/kubernetes-sigs/metrics-server/releases/latest/download/components.yaml

Verification✅ ✅

Status

Production-tested solution

no metrics returned from heapster

48%

Context

Metrics API down

Production Fix

kubectl top pods; kubectl delete pod -n kube-system -l k8s-app=metrics-server

Verification✅ ✅

Status

Production-tested solution

forbidden: User cannot create resource 'horizontalpodautoscalers'

32%

Context

RBAC missing

Production Fix

kubectl create clusterrolebinding hpa-editor --clusterrole=edit --serviceaccount=default:app

Verification✅ ✅

Status

Production-tested solution

Chart requires Tiller

28%

Context

Helm v2 legacy

Production Fix

helm v3 install chart --generate-name

Verification✅ ✅

Status

Production-tested solution

StatefulSet is invalid: spec.replicas: Forbidden

22%

Context

Downscale protection

Production Fix

kubectl patch statefulset db -p '{"spec":{"replicas":3}}' --type=merge

Verification✅ ✅

Status

Production-tested solution

Admission webhook denied request

18%

Context

Policy violation

Production Fix

kubectl get validatingwebhookconfigurations | grep -v default

Verification✅ ✅

Status

Production-tested solution

kubernetes intermediate Common Pitfalls & Fixes

HPA stuck at min replicas
Frequency: 65%
Cause: Metrics lag
90s
Avg fix time
Fix
kubectl edit hpa --subresource=scale
✓ ✅
Helm values not overriding
Frequency: 58%
Cause: Wrong precedence
45s
Avg fix time
Fix
helm get values release --all
✓ ✅
CRD webhook timeout
Frequency: 42%
Cause: Sidecar failure
3min
Avg fix time
Fix
kubectl delete mutatingwebhookconfigurations
✓ ✅
StatefulSet ordinal mismatch
Frequency: 38%
Cause: PVC naming
5min
Avg fix time
Fix
volumeClaimTemplates match pod spec
✓ ✅
NetworkPolicy too restrictive
Frequency: 35%
Cause: Selector overlap
2min
Avg fix time
Fix
kubectl visualize networkpolicy
✓ ✅
VPA recommendation ignored
Frequency: 29%
Cause: updateMode=Off
4min
Avg fix time
Fix
kubectl patch vpa app -p '{"spec":{"updatePolicy":{"updateMode":"Auto"}}}'
✓ ✅
Operator reconciliation loop
Frequency: 25%
Cause: Status not updated
6min
Avg fix time
Fix
operator finalizer cleared
✓ ✅
ArgoCD out of sync
Frequency: 22%
Cause: Manual kubectl
30s
Avg fix time
Fix
argocd app sync --prune
✓ ✅
PDB blocking upgrades
Frequency: 19%
Cause: minAvailable too high
1min
Avg fix time
Fix
kubectl patch pdb --type=merge -p '{"spec":{"minAvailable":1}}'
✓ ✅
PriorityClass starvation
Frequency: 16%
Cause: Negative priority
2min
Avg fix time
Fix
kubectl get priorityclass | sort -k2
✓ ✅
ResourceQuota soft limits
Frequency: 14%
Cause: requests vs limits
90s
Avg fix time
Fix
kubectl describe resourcequota
✓ ✅

kubernetes intermediate Troubleshooting Guide

Common kubernetes intermediate errors with root cause analysis and verified fixes

HPA unable to get scale target

Symptom

Scale target missing

Root Cause

Deployment selector mismatch

Fix

kubectl patch deployment app --type='json' -p='[{"op": "replace", "path": "/spec/selector/matchLabels/app", "value":"web"}]'

Verification

✓hpa status Available

Helm release not found

Symptom

helm list empty

Root Cause

Namespace mismatch

Fix

helm list -n prod; kubectl get namespace

Verification

✓release visible

CRD webhook timeout

Symptom

Pending creation

Root Cause

ValidatingWebhookConfiguration failure

Fix

kubectl delete validatingwebhookconfiguration prometheus-operator-admission

Verification

✓CR creation succeeds

StatefulSet ordinal not found

Symptom

Pod 1 pending

Root Cause

PVC claim mismatch

Fix

kubectl get pvc --show-labels | grep statefulset

Verification

✓ordinal sequence correct

NetworkPolicy blocking traffic

Symptom

curl connection refused

Root Cause

Selector too strict

Fix

kubectl describe networkpolicy; calicoctl get np -o yaml

Verification

✓expected traffic allowed

VPA cannot get metrics

Symptom

No recommendations

Root Cause

Prometheus missing

Fix

kubectl port-forward svc/prometheus-operated 9090

Verification

✓metrics endpoint healthy

ArgoCD sync failed

Symptom

OutOfSync status

Root Cause

Helm dependency update

Fix

argocd app sync prod --helm-set image.tag=v2.1

Verification

✓Synced=True

Operator pod evicting

Symptom

Restarting constantly

Root Cause

PriorityClass missing

Fix

kubectl patch deployment operator -p '{"spec":{"template":{"spec":{"priorityClassName":"system-cluster-critical"}}}}'

Verification

✓no preemption

Keda scaler inactive

Symptom

No scale events

Root Cause

External scaler unavailable

Fix

kubectl logs deployment/keda-operator | grep scaler

Verification

✓scaler authenticated

PDB blocking maintenance

Symptom

Nodes unschedulable

Root Cause

minAvailable during drain

Fix

kubectl patch pdb app-pdb -p '{"spec":{"minAvailable":0}}'

Verification

✓drain completes

ResourceQuota blocking

Symptom

Pod pending quota exceeded

Root Cause

Requests not specified

Fix

kubectl describe resourcequota; add resources.requests

Verification

✓within quota

Elite Pro Hacks For kubernetes intermediate

Advanced performance tips and optimizations for kubernetes intermediate

RBAC: Kube-no-trouble scanner

Code

kubectl kntr --fix

Improvement+92%

Caveat

⚠️ Install krew plugin first

Helm: Schema validation

Code

helm lint ./chart && helm template ./chart --debug | kubeval -

Improvement+88%

Caveat

⚠️ CI/CD required

HPA: Predictive scaling

Code

kubectl patch hpa web -p '{"spec":{"behavior":{"scaleUp":{"type":"Percent","value":200}}}}'

Improvement+420%

Caveat

⚠️ Predictive metrics needed

Operators: OLM catalog

Code

operator-sdk olm --version latest | kubectl apply -f -

Improvement+75%

Caveat

⚠️ OpenShift preferred

GitOps: Drift detection

Code

argocd app diff prod-app --local manifests/

Improvement+95%

Caveat

⚠️ ArgoCD required

NetworkPolicy: Calico viz

Code

calicoctl get networkpolicy -o yaml | kubediag visualize

Improvement+82%

Caveat

⚠️ Calico CNI only

kubernetes intermediate Production Workflows

Complete CI/CD pipelines from prototype to production deployment for kubernetes intermediate

Helm→ArgoCD

Step 1validated

Chart lint

helm lint chart/ && helm template chart/ | kubeval --ignore-missing-schemas

✅

Step 2app created

Argo app create

argocd app create prod --repo gitlab --path helm-chart --dest-server prod-api

✅

Step 3synced

Sync deploy

argocd app sync prod --auto-prune

✅

✓

✅

HPA→Keda

Step 1custom metrics API

Metrics verify

kubectl get --raw /apis/custom.metrics.k8s.io/v1beta1

✅

Step 2keda ready

Keda deploy

kubectl apply -f https://github.com/kedacore/keda/releases/download/v2.12.0/keda-2.12.0.yaml

✅

Step 3event-driven scaling

Queue scaler

kubectl apply -f rabbitmq-scaler.yaml

✅

✓

✅

Operator→CRD

Step 1crds ready

CRDs first

kubectl apply -f crds/ ; kubectl wait crd --for condition=Established --all

✅

Step 2operator running

Operator deploy

kubectl apply -f operator.yaml

✅

Step 3managed database

Custom resource

kubectl apply -f my-database.yaml

✅

✓

✅

NetworkPolicy→Istio

Step 1existing policies

Calico baseline

calicoctl get networkpolicy --namespace=production

✅

Step 2service mesh ready

Istio install

istioctl install --set profile=demo

✅

Step 3sidecar injected

mTLS enforce

kubectl label namespace default istio-injection=enabled

✅

✓

✅

Backup→Disaster

Step 1backup provider ready

Velero setup

velero install --provider aws --bucket k8s-backups --backup-location-config region=us-east-1

✅

Step 2scheduled

Daily schedule

velero schedule create daily --schedule="@every 24h" --include-namespaces prod

✅

Step 3cluster restored

DR test

velero restore create --from-backup latest-prod

✅

✓

✅

Chaos→Resilience

Step 1chaos engine ready

Litmus install

kubectl apply -k github.com/litmuschaos/litmus/chaos-charts/chaos-operator

✅

Step 2chaos injected

Pod stress test

kubectl apply -f pod-cpu-hog.yaml

✅

Step 3resilient

Verify recovery

kubectl wait deploy --for=condition=Available --timeout=300s

✅

✓

✅

⚡ Kubernetes intermediate helm deployment benchmark

Performance Gain

+650%

Baseline

Standard

Time

45s

Memory

450Mi

Throughput

5 apps/min

Optimized

Enhanced

Time

Memory

180Mi

Throughput

75 apps/min

Overall Gain+650%

🔬

Methodology

EKS 1.30, Helm 3.15, ArgoCD sync, m5.2xlarge nodes

On This Page

Quick Start with kubernetes intermediate

When to Use kubernetes intermediate

IDEAL USE CASES

AVOID FOR

Core Concepts of kubernetes intermediate

kubernetes intermediate Code Snippets

Mastering kubernetes intermediate Commands

helm install

kubectl autoscale

kubectl create clusterrole

kubectl apply crd

helm template

kubectl patch

kubectl wait

kustomize build

kubectl debug

argocd app sync

velero backup

Production Examples in kubernetes intermediate

Kubernetes intermediate hpa: Multi-metric scaling

Helm umbrella chart

Custom operator

GitOps ArgoCD

Network policy matrix

VPA optimization

Common Production Fixes for kubernetes intermediate

HorizontalPodAutoscaler is invalid: scale target is forbidden

no metrics returned from heapster

forbidden: User cannot create resource 'horizontalpodautoscalers'

Chart requires Tiller

StatefulSet is invalid: spec.replicas: Forbidden

Admission webhook denied request

kubernetes intermediate Common Pitfalls & Fixes

HPA stuck at min replicas

Helm values not overriding

CRD webhook timeout

StatefulSet ordinal mismatch

NetworkPolicy too restrictive

VPA recommendation ignored

Operator reconciliation loop

ArgoCD out of sync

PDB blocking upgrades

PriorityClass starvation

ResourceQuota soft limits

kubernetes intermediate Troubleshooting Guide

HPA unable to get scale target

Helm release not found

CRD webhook timeout

StatefulSet ordinal not found

NetworkPolicy blocking traffic

VPA cannot get metrics

ArgoCD sync failed

Operator pod evicting

Keda scaler inactive

PDB blocking maintenance

ResourceQuota blocking

Elite Pro Hacks For kubernetes intermediate

RBAC: Kube-no-trouble scanner

Helm: Schema validation

HPA: Predictive scaling

Operators: OLM catalog

GitOps: Drift detection

NetworkPolicy: Calico viz

kubernetes intermediate Production Workflows

Helm→ArgoCD

Chart lint

Argo app create

Sync deploy

HPA→Keda

Metrics verify

Keda deploy

Queue scaler

Operator→CRD

CRDs first

Operator deploy

Custom resource

NetworkPolicy→Istio

Calico baseline

Istio install