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Course Outline
1. Virtualization Fundamentals
- Overview of Operating System Concepts: CPU, Memory, Network, and Storage
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Hypervisors
- The supervisor of virtual environments
- Understanding "Host" machines and "guest" operating systems
- Distinguishing between Type-1 and Type-2 Hypervisors
- Key platforms: Citrix XEN, VMware ESX/ESXi, Microsoft Hyper-V, and IBM LPAR
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Network Virtualization
- Brief introduction to the 7-Layer OSI Model
- Focusing on the Network Layer
- Understanding the TCP/IP Model or Internet Protocol
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Detailed Focus on Protocol Layers
- 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
- Key Network Devices: Firewalls, Load Balancers, Routers, and Adapters
- Virtualized Networks
- Higher-Level Abstractions: Subnets and Availability Zones
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Practical Exercise:
- Familiarize yourself with the ESXi cluster and the vSphere client.
- Create and update networks within the ESXi Cluster, deploy guest VMs from VMDK packages, and enable inter-VM connectivity within the cluster.
- Modify a running VM instance and capture a snapshot.
- Update firewall rules in ESXi using the vSphere client.
2. Cloud Computing: A Paradigm Shift
- A rapid and cost-effective pathway to bring products and solutions to the global market.
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Resource Sharing
- Virtualization of already virtualized environments
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Key Benefits:
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On-Demand Resource Elasticity
- Facilitates ideation, coding, and deployment without heavy infrastructure commitments
- Enables rapid CI/CD pipelines
- Environment isolation and vertical autonomy
- Enhanced security through layered architecture
- Cost optimization
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On-Demand Resource Elasticity
- On-premise Cloud solutions versus 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 study. AWS is recommended.
- Introduction to AWS VPC, AWS EC2, etc.
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PaaS (Platform as a Service)
- Platforms include: AWS, Azure, Google Cloud, CloudFoundry, Heroku
- Introduction to AWS DynamoDB, AWS Kinesis, etc.
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SaaS (Software as a Service)
- Brief overview
- Examples: Microsoft Office, Confluence, Salesforce, Slack
- SaaS builds upon PaaS, which in turn builds upon IaaS, all of which rely 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 also acceptable, but RHEL/CentOS are preferred.
- Obtain individual AWS IAM accounts from your cloud administrator.
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Each participant must complete these steps independently.
- The ability to carve out your own entire infrastructure on-demand best demonstrates the power of cloud computing.
- Use AWS Wizards and the 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 ports https 443 and http 80
- Blocks all other incoming connections
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SG-Service
- Allows incoming traffic only from security group SG-Internet on ports https 443 and http 80
- Allows ICMP traffic only from SG-Internet
- Blocks all other incoming connections
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SG-SSH:
- Allows SSH: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.
- Upload static content of your choice (HTML pages, images) to be served by NGINX (on port 80 over HTTP) and define URLs for them.
- Test the URL from within the instance itself.
- Create an AMI image from this running instance.
- Deploy a new instance using that AMI and host it on Subnet-2. Attach the instance to SG-Service and SG-SSH groups.
- Run the NGINX server on the new instance and validate that the access URL for the static content (as created in step (i)) works correctly.
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Create a new “classic” Elastic Load Balancer (ELB) and attach it to SG-Internet.
- Note the differences between Classic, Application, and Network Load Balancers.
- Create a routing rule to forward all http 80 and https 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, then import the certificate to AWS Certificate Manager (ACM).
5. Cloud Monitoring: Introduction and Hands-on Project
- AWS CloudWatch metrics
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Access the AWS CloudWatch dashboard for the EC2 instances.
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Retrieve the relevant metrics and explain their variability over time.
- Reference: 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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Access the AWS CloudWatch dashboard for the ELB.
- Observe the ELB metrics and explain their variability over time.
- Reference: https://docs.aws.amazon.com/elasticloadbalancing/latest/classic/elb-cloudwatch-metrics.html
6. Advanced Concepts for Further Learning
- Hybrid Cloud -- combining on-premise and public cloud resources.
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Migration Strategies: Moving from 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
- Using AWS CloudWatch metrics to determine system health
Requirements
There are no specific prerequisites required to enroll in this course.
21 Hours
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