☁️ Cloud Platforms
Cloud platforms are large‑scale, on‑demand computing environments that provide virtualized compute, storage, networking, identity, security, and application services without requiring physical servers. They represent the evolution of infrastructure from hardware → virtualization → software‑defined datacenters → fully managed cloud services.
The concise takeaway: Cloud platforms let you run infrastructure as scalable services instead of physical machines.
What Cloud Platforms Actually Are
Section titled “What Cloud Platforms Actually Are”Cloud platforms provide:
- Virtual machines
- Containers and orchestration
- Object and block storage
- Virtual networking
- Identity and access management
- Managed databases
- Monitoring and logging
- Security and compliance tooling
They replace traditional datacenter operations with API‑driven, elastic, pay‑as‑you‑go services.
The Three Major Cloud Platforms
Section titled “The Three Major Cloud Platforms”1. Amazon Web Services (AWS)
Section titled “1. Amazon Web Services (AWS)”The largest cloud provider, known for breadth of services.
Key components:
- EC2 (compute)
- S3 (object storage)
- VPC (networking)
- IAM (identity)
- RDS (managed databases)
- Lambda (serverless)
AWS is widely used for enterprise workloads, startups, and global-scale applications.
2. Microsoft Azure
Section titled “2. Microsoft Azure”Strongest choice for organizations using Windows Server, AD DS, Entra ID, and Microsoft 365.
Key components:
- Azure VMs
- Azure Blob Storage
- Virtual Networks
- Entra ID (identity)
- Azure SQL
- Azure Functions
Azure excels in hybrid identity and enterprise integration.
3. Google Cloud Platform (GCP)
Section titled “3. Google Cloud Platform (GCP)”Known for data analytics, machine learning, and global networking.
Key components:
- Compute Engine
- Cloud Storage
- VPC networks
- IAM
- BigQuery
- Cloud Run
GCP is popular for analytics-heavy and container-native workloads.
Core Cloud Concepts SysAdmins Must Master
Section titled “Core Cloud Concepts SysAdmins Must Master”1. Compute Services
Section titled “1. Compute Services”Virtual machines, autoscaling groups, serverless functions, and container runtimes.
2. Storage Services
Section titled “2. Storage Services”Object storage (S3/Blob), block storage (EBS/Disks), file shares, and archival tiers.
3. Virtual Networking
Section titled “3. Virtual Networking”VPCs/VNets, subnets, routing tables, NAT gateways, load balancers, and firewalls.
4. Identity & Access Management
Section titled “4. Identity & Access Management”Roles, policies, service principals, managed identities, and least‑privilege access.
5. Managed Databases
Section titled “5. Managed Databases”SQL, NoSQL, caching layers, and fully managed database engines.
6. Monitoring & Logging
Section titled “6. Monitoring & Logging”Metrics, logs, traces, alerts, dashboards, and distributed observability.
7. Security & Compliance
Section titled “7. Security & Compliance”Encryption, key management, network segmentation, posture management, and governance.
8. Automation & IaC
Section titled “8. Automation & IaC”Terraform, OpenTofu, ARM/Bicep, CloudFormation — provisioning cloud resources via code.
Cloud Deployment Models
Section titled “Cloud Deployment Models”1. Public Cloud
Section titled “1. Public Cloud”Shared infrastructure operated by AWS, Azure, or GCP.
2. Private Cloud
Section titled “2. Private Cloud”Dedicated infrastructure, often using VMware, OpenStack, or Nutanix.
3. Hybrid Cloud
Section titled “3. Hybrid Cloud”Mix of on‑prem and cloud, connected via VPN or ExpressRoute/Direct Connect.
4. Multi‑Cloud
Section titled “4. Multi‑Cloud”Using multiple cloud providers simultaneously.
Why Cloud Platforms Matter for SysAdmins
Section titled “Why Cloud Platforms Matter for SysAdmins”Cloud platforms provide:
- Elastic scalability
- Global availability
- High reliability
- Strong security baselines
- Faster provisioning
- Lower operational overhead
- Better disaster recovery
- Integration with SaaS and identity platforms
They shift SysAdmins from hardware maintenance to platform engineering and automation.
Summary
Section titled “Summary”Cloud platforms are API‑driven environments that provide compute, storage, networking, identity, and managed services at global scale.
They include:
- AWS
- Azure
- GCP
And rely on core concepts like:
- Compute
- Storage
- Virtual networking
- IAM
- Managed databases
- Monitoring
- Security
- IaC
They allow SysAdmins to operate infrastructure as scalable, automated, cloud‑native services instead of physical servers.