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Course Outline
Virtualization Fundamentals
- Overview of Operating System Concepts: CPU, Memory, Network, and Storage
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Hypervisors
- Managing Virtual Machines: The Supervisor of Supervisors
- Understanding the "Host" machine and "Guest" OS
- Distinction between Type-1 and Type-2 Hypervisors
- Key Platforms: Citrix XEN, VMware ESX/ESXi, MS Hyper-V, IBM LPAR
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Network Virtualization
- Brief Introduction to the 7-Layer OSI Model
- Focusing on the Network Layer
- The TCP/IP Model or Internet Protocol
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Deep Dive into Specific Protocols
- Application Layer: SSL
- Transport Layer: TCP
- Internet Layer: IPv4/IPv6
- Link Layer: Ethernet
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Packet Structure and Networking Components
- Addressing: IP Addresses and Domain Names
- Core Components: Firewall, Load Balancer, Router, Adapter
- Virtualized Network Architectures
- Higher-Order Abstractions: Subnets and Zones
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Hands-on Exercise:
- Familiarization with the ESXi cluster and vSphere client interface.
- Creating and updating networks within an ESXi Cluster, deploying guest machines from VMDK packages, and enabling inter-connectivity between guests.
- Modifying a running VM instance and capturing a snapshot.
- Updating firewall rules in ESXi using the vSphere client.
2. Cloud Computing: A Paradigm Shift
- A rapid, cost-effective pathway to make products and solutions available globally
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Resource Sharing
- Virtualization of virtualized environments
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Key Benefits:
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On-demand Resource Elasticity
- Ideate - Code - Deploy without needing dedicated infrastructure
- Rapid CI/CD Pipelines
- Environment Isolation and Vertical Autonomy
- Enhanced Security Through Layering
- Expense Optimization
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On-demand Resource Elasticity
- On-premise Cloud and Public Cloud Providers
- Cloud Computing as an Effective Conceptual Abstraction for Distributed Computing
3. Introduction to Cloud Solution Layers:
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IaaS (Infrastructure as a Service)
- Major Providers: AWS, Azure, Google Cloud
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Select one Provider for continued learning. AWS is recommended.
- Introduction to AWS VPC, AWS EC2, etc.
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PaaS (Platform as a Service)
- Providers: AWS, Azure, Google Cloud, CloudFoundry, Heroku
- Introduction to AWS DynamoDB, AWS Kinesis, etc.
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SaaS (Software as a Service)
- High-level Overview
- Examples: Microsoft Office, Confluence, SalesForce, Slack
- The Dependency Chain: SaaS builds on PaaS, which builds on IaaS, which relies on Virtualization
4. IaaS Cloud Hands-on Project
- This project utilizes AWS as the IaaS Cloud Provider
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Use CentOS/RHEL as the operating system for the remainder of the exercise
- Ubuntu is an acceptable alternative, but RHEL/CentOS are preferred
- Obtain individual AWS IAM accounts from your cloud administrator
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Each student must complete these steps independently
- The ability to carve out your own infrastructure on-demand best demonstrates the power of cloud computing
- Use AWS Wizards and AWS online consoles to accomplish these tasks unless otherwise specified
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Create a public VPC in the us-east-1 Region
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Configure two Subnets (Subnet-1 and Subnet-2) across two different Availability Zones
- Refer to https://docs.aws.amazon.com/AmazonVPC/latest/UserGuide/VPC_Scenarios.html for guidance.
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Create three separate Security Groups
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SG-Internet
- Allows incoming traffic from the Internet on https (port 443) and http (port 80)
- No other incoming connections are allowed
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SG-Service
- Allows incoming traffic only from security group SG-Internet on https (port 443) and http (port 80)
- Allows ICMP traffic only from SG-Internet
- No other incoming connections are allowed
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SG-SSH
- Allows SSH (port 22) incoming connections only from a single IP address matching the public IP of the student's lab machine. If the lab machine is behind a proxy, use the public IP of the proxy.
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SG-Internet
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Configure two Subnets (Subnet-1 and Subnet-2) across two different Availability Zones
- Deploy an instance of an AMI corresponding to your chosen OS (preferably the latest RHEL/CentOS versions available in AMIs) and host the instance on Subnet-1. Attach the instance to SG-Service and SG-SSH groups.
- Access the instance using SSH from your lab machine.
- Install the NGINX server on this instance.
- Place static content of your choice (html pages, images) to be served by NGINX (on port 80 via HTTP) and define URLs for them.
- Test the URL directly from that machine.
- Create an AMI image from this running instance.
- Deploy that new AMI and host the instance on Subnet-2. Attach the instance to SG-Service and SG-SSH groups.
- Run the NGINX server and validate that the access URL for the static content created in the previous step works correctly.
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Create a new "classic" Elastic Load Balancer and attach it to SG-Internet.
- Note the differences from Application Load Balancer and Network Load Balancer.
- Create a routing rule that forwards all http (port 80) and https (port 443) traffic to an instance group comprising the two instances created above.
- Using any certificate management tool (e.g., java keytool), create a key-pair and a self-signed certificate, and import the certificate to AWS Certificate Manager (ACM).
5. Cloud Monitoring: Introduction and Hands-on Project
- Overview of AWS CloudWatch metrics
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Navigate to the AWS CloudWatch dashboard for the instances
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Retrieve the relevant metrics and explain their variability over time
- Refer to https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/viewing_metrics_with_cloudwatch.html
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Retrieve the relevant metrics and explain their variability over time
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Navigate to the AWS CloudWatch dashboard for the ELB
- Observe the ELB metrics and explain their variability over time
- Refer to https://docs.aws.amazon.com/elasticloadbalancing/latest/classic/elb-cloudwatch-metrics.html
6. Advanced Concepts for Further Learning
- Hybrid Cloud Models: Combining on-premise and public cloud environments
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Migration Strategies: On-premise to Public Cloud
- Application Code Migration
- Database Migration
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DevOps Practices
- Infrastructure as Code (IaC)
- AWS CloudFormation Templates
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Auto-scaling Mechanisms
- Using AWS CloudWatch metrics to determine system health
Requirements
No specific prerequisites are required to attend this course.
21 Hours
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