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Lessons (28)

• Count, for_each, Functions, and Stable Identities

  … for tag maps, and cidrsubnet for subnet math. hcl locals { common tags = { ManagedBy = "Terraform", Team = "platform" } tags = merge …

• Run Containers on AWS with ECR and ECS

  … Use distinct tags or digests; changing the bytes behind the same tag can make a release harder to …

• Production Capstone and Interview Practice

  … It creates a private, encrypted, versioned bucket with owner tags. It publishes bucket id and bucket arn . Move …

• Cost Optimization and the Well-Architected Framework

  … Enforce with tag policies and SCPs. Pricing models Model Discount Commitment Best for --- --- --- --- On-demand None None Unpredictable …

• Python Fundamentals

  … print(key, value) tags = {"python", "api", "python"} set: unique values → {"python", "api"} tags & {"api", "web"} intersection → {"api"} Need …

• Providers and Your First AWS Resources

  … This example intentionally leaves force destroy disabled. Practice: change only the Environment tag and inspect the plan. It …

• Multi-Account Strategy, Governance and Security Operations

  … Tag policies standardize supported tags; they do not by themselves guarantee that every resource is tagged. Add appropriate …

• IAM Deep Dive: Policy Evaluation, STS and Cross-Account Access

  Understand how AWS decides allow or deny, and use roles, conditions, boundaries and tags to grant precise access …

• Practical Project: Deploy a Real CRM App on EKS

  … Tag it with the Git SHA (and release version on tags). 5. Push it to ECR. 6. Update …

• Drift, Troubleshooting, and Disaster Recovery

  … Re-running blindly can create duplicates or naming conflicts. Respond to drift If someone changed a bucket tag …

• Go Web Services with Gin

  … chain and respond Binding and validating JSON ⭐ Struct tags say how JSON maps to fields ( json:"…" ) and what …

• Safe AWS Deployments with IaC and CI/CD

  … AES256 Tags: - Key: Purpose Value: academy-lab Outputs: BucketName: Value: !Ref UploadsBucket CloudFormation generates a bucket name, avoiding …

• HCL, Resource Addresses, and Project Layout

  … by the local provider. hcl locals { project = "academy" tags = { Project = local.project ManagedBy = "Terraform" } } Locals name expressions. They …

• Reusable Modules and Clear Interfaces

  … might always configure encryption, public-access protection, ownership tags, and versioning. Callers supply a naming prefix and retention …

• Testing, Preconditions, and Policy Checks

  … reject public S3 buckets, unapproved regions, missing owner tags, or production database destruction. Implement policies with the chosen …

• Your Practical Kubernetes Workflow

  … or digest; do not deploy a vague latest tag. - Add a readiness check, CPU/memory requests, and a …

• Terraform: Start Here

  … Plan Proposed operations Add one bucket, change its tags Module A directory of Terraform configuration Reusable private storage …

• Troubleshooting Playbook

  … events ImagePullBackOff / ErrImagePull - Typo in image name or tag. - Private registry without imagePullSecrets . - Node cannot reach the registry …

• RBAC and Cluster Security

  … Pin images by digest ( image@sha256:... ) or immutable tags; scan with Trivy or Grype in CI. - Sign images …

• Extending Kubernetes: CRDs, Operators and Admission

  … require resource limits, block latest tags ValidatingAdmissionPolicy (no webhook needed) Built in and written in CEL. yaml apiVersion …

• Pods: Where Your App Actually Runs

  … retries it Read previous logs ImagePullBackOff Image name, tag, or registry permission is wrong Check image and registry …

• React Fundamentals

  … write {expression} for JavaScript values, and close every tag ( <img / ). Props: data flows down Props are a component …

• TypeScript Essentials

  … boolean = true; let tags: string[] = ["tech", "sale"]; let point: [number, number] = [10, 20]; // tuple let anything: unknown = JSON …

• Deploying & Operating Microservices

  … once ; promote the same image through every environment. - Tag images with the git SHA or a version, never …

• Frontend Security

  … posts a comment hiding an img tag with an onerror script V- S: opens the page S-- V …

• Containers at Scale: ECS Deep Dive and EKS

  … images with ECR enhanced scanning (Inspector). - Use immutable tags and pull by digest in production. - Add lifecycle policies …

• AWS Interview Questions: Clear Answers

  … bill Strong answer: compare service, Region, usage type, tags, and time period. Check running resources, data transfer, NAT …

• Caching & Redis

  … queues, recent activity Set SADD , SISMEMBER Unique visitors, tags Sorted set ZADD , ZRANGE , ZREVRANK Leaderboards , priority queues, time …