Cloud Migration Strategies

Study Notes

Why migrate to the cloud?
- Scalability and flexibility
- Reduced IT costs
- Increased collaboration and productivity
- Enhanced disaster recovery and business continuity
Types of cloud migration:
- Lift and Shift: Rehosting applications in the cloud without changes
- Re-platform: Making minimal changes to the application to take advantage of cloud-native features
- Re-architecture: Rebuilding applications to take full advantage of cloud-native features
Cloud migration strategies:
- Big Bang: Migrating entire infrastructure at once
- Phased Migration: Migrating applications and services in phases
- Hybrid: Migrating certain workloads to the cloud while keeping others on-premises

Cloud Security Challenges:
- Data breaches: Unauthorized access to sensitive data
- Misconfigured resources: Insecurely configured cloud resources
- Insufficient identity and access management: Weak identity and access controls
Cloud Security Best Practices:
- Implement multi-factor authentication
- Use secure protocols for data transfer (HTTPS, SFTP)
- Regularly update and patch cloud-based systems
- Use encryption for data at rest and in transit
- Monitor cloud resources for security breaches and anomalies
Cloud Security Architecture:
- Security as a Service (SaaS): Cloud-based security services
- Infrastructure as a Service (IaaS): Secure cloud infrastructure
- Platform as a Service (PaaS): Secure cloud platforms

Motivations for cloud migration:
- Scalability and flexibility to accommodate changing business needs
- Reduced IT costs through reduced infrastructure and maintenance expenses
- Increased collaboration and productivity through enhanced accessibility and scalability
- Enhanced disaster recovery and business continuity through cloud-based backup and recovery systems
Cloud migration approaches:
- Lift and Shift: Rehosting applications in the cloud without changes to take advantage of cloud scalability and reliability
- Re-platform: Making minimal changes to the application to leverage cloud-native features such as database services and messaging queues
- Re-architecture: Rebuilding applications from scratch to fully utilize cloud-native features and services
Cloud migration strategies:
- Big Bang: Migrating entire infrastructure at once to minimize downtime and ensure quick realization of benefits
- Phased Migration: Migrating applications and services in phases to minimize risk and ensure incremental benefits
- Hybrid: Migrating certain workloads to the cloud while keeping others on-premises to balance benefits and risks

Cloud security challenges:
- Data breaches: Unauthorized access to sensitive data through inadequate access controls or insecure data storage
- Misconfigured resources: Insecurely configured cloud resources providing unauthorized access to data or systems
- Insufficient identity and access management: Weak identity and access controls failing to authenticate and authorize users
Cloud security best practices:
- Implement multi-factor authentication to prevent unauthorized access
- Use secure protocols for data transfer (HTTPS, SFTP) to protect data in transit
- Regularly update and patch cloud-based systems to prevent exploitation of known vulnerabilities
- Use encryption for data at rest and in transit to protect sensitive data
- Monitor cloud resources for security breaches and anomalies to quickly respond to incidents
Cloud security architecture:
- Security as a Service (SaaS): Cloud-based security services providing scalable and on-demand security capabilities
- Infrastructure as a Service (IaaS): Secure cloud infrastructure providing secure compute, storage, and networking resources
- Platform as a Service (PaaS): Secure cloud platforms providing secure development, deployment, and management of applications