Junsung

# The Netflix early business model environment architecture and research, based on AWS # I participated as the team leader in this project. I designed the whole system and handle all building processes. This service is based on the Netflix business early model. Every resource can be managed by using SSH to connect to the Bastion host. Also, It will be encrypted by a VPN server in the Bastion host. All logs created from the Bastion host are saved to EFS once a day by the schedule of crontab and then, those are backed up again to S3. Web services are designed based on WordPress. Media resource was made by posting save to S3. The web server versions are managed by the Autoscaling group of AWS. RDS has the Multi-AZ status for fail-over and also has 'only read replicas' for processing lots of requests from the expended web server.

# Building automation EKS based on Terraform and GitLab # 1. Understanding AWS & DevOps Tasks AWS Resources / DevOps Basics / DevOps Scenarios & Solutions / AWS Setup: Resource Config / AWS Network Config / GitLab Installation on EC2 2. Containers & ECS Container Concepts: Repositories, Tools, Images / ECS Overview: Clusters, Task Definitions, Fargate, ECR / User-ECS Communication: Load Balancer, Accessible Domain 3. ECS Deployment Automation AWS SDK Usage (Python) / Writing ECS Deployment Scripts / Uploading Scripts to ECR: Image Build, Upload 4. Infrastructure with Terraform Terraform Basics: Concepts (plan, apply, import, delete) / AWS Infra Setup using Terraform 5. CI/CD with GitLab CI/CD Concepts: CI & CD / GitLab Project Upload: Frontend, Backend / Project Pipelines: Build, Package, Deploy / Frontend: S3 Upload, Backend: ECS Deployment

# Building EKS service based on the AWS console # 1. Cloud Environment Configuration AWS Free Tier Account Creation / AWS IAM Configuration / VPC Establishment / Bastion Host Setup 2. Kubernetes-Based EKS Environment Setup and Web Service Deployment EKS Cluster Creation / Worker Node Group Provisioning / Deployment of Nginx Service 3. Log Collection via EFK Stack Implementation ElastiCache Implementation / Fluentd Deployment / Kibana Setup 4. Real-time CloudWatch to Slack Alerting CloudWatch Alarm Configuration / Sending Alerts to Slack

# Multi-cloud architecture for social media services. # Building VPN tunnels between AWS and GCP that include features dynamic routing, and high availability(HA). These are composed through the services of AWS that BGP, the customer gateway, the virtual private gateway, and services of GCP the site-to-site VPN connection, and the cloud router, VPN connection. VPN server to connect between developer and bastion host. These are built through IKEv2 from L2TP VPN server.

1. Prerequisites for Azure administrators 2. Manage identities and governance in Azure 3. Implement and manage storage in Azure 4. Deploy and manage Azure compute resources 5. Configure and manage virtual networks for Azure administrators 6. Monitor and back up Azure resources

Cloud Setup: AWS Creation, IAM, VPC, Bastion Kubernetes & Web: EKS, Nginx EFK Log: ElastiCache, Fluentd, Kibana Real-time Alerts: CloudWatch to Slack Linux Essentials: Ubuntu, Commands, Editors, SSH Windows Management: AD, Web, Email, DNS, File Virtualization: ESXi, vCenter, vSphere Docker & Containers: Installation, Commands, Networking Kubernetes Mastery: Orchestration, Pods, Controllers Terraform: IaC, Installation, AWS Provisioning Ansible Automation: Setup, CentOS, Ubuntu, NXOS

Security IAM / Networking / Computing, Storage / Database Service / Monitoring and Scaling / Container, Serverless / Edge Service / Backup and Recovery

Virtual Networks / Virtual Machines / IAM / Storage and Database / Resource Management / Resource Monitoring / Interconnecting Networks / Load Balancing and Autoscaling / Infrastructure Automation / Managed Service