Alexis Kestler
Hybrid cloud refers to an integrated cloud computing environment that uses a mix of on-premises infrastructure, private cloud services, and third-party public cloud solutions. According to Flexera‘s 2021 State of the Cloud Report, over 90% of enterprises now have a multi-cloud strategy, with hybrid cloud adoption growing over 15% year-over-year.
As companies digitally transform, hybrid cloud allows you to optimize storage, computing and resources across platforms to meet changing business demands with maximum flexibility. In this comprehensive guide, we will unpack:
- Hybrid cloud connectivity and integration
- Hybrid deployment models and architectures
- Steps to migrate legacy systems onto hybrid platforms
- Cost, security and scalability advantages
- Key challenges to watch out for
I will also share my insider perspective as a cloud architect on how enterprises can successfully navigate hybrid cloud adoption. Let‘s get started!
The Anatomy of Hybrid Cloud Architecture
Hybrid clouds connect infrastructure and services between cloud providers like AWS, Google Cloud and Azure to on-premises data centers. This lets you deliver IT resources across environments as a unified ecosystem.
The hybrid model brings together the best aspects of private and public clouds:
Private Cloud Benefits
- Full control over resources and security
- On-premises accessibility
- Owned infrastructure for sensitive applications
Public Cloud Benefits
- Flexibility and scalability on demand
- Pay-as-you-go pricing
- Quick access to advanced capabilities
Here is a diagram highlighting how private, multi-cloud and legacy systems interoperate in a hybrid model:
![Diagram showing connectivity across private cloud, AWS cloud, GCP cloud and on-prem mainframe]
As you can see, hybrid cloud relies on extensive integration and orchestration between platforms. Let‘s examine some key connectivity technologies:
Virtual Private Networks (VPN) – Site-to-site VPNs securely connect on-prem resources to cloud services over the public internet.
Direct Connect – Dedicated high-bandwidth networks between data centers bypass the internet for faster data transfer.
APIs and Automation – Cloud platforms provide APIs to systematically manage services using infrastructure-as-code techniques.
Containerization – Containers package apps with dependencies for reliable deployment across environments.
With the right connectivity, you can achieve seamless workload migration, improved disaster recovery, cloud bursting, analytics and application integration.
Navigating Hybrid Cloud Deployment Approaches
There are primarily four deployment models that enterprises take to adopt hybrid cloud:
| Model | Overview | Use Cases |
|---|---|---|
| Partial Migration | Keep mission-critical apps on private cloud, move secondary services to public cloud | Compliance, security prioritization |
| Cloud Bursting | Run baseline on private infrastructure, “burst” to public cloud to handle spikes | eCommerce, media, gaming |
| Full Migration with Backfill | Shift entire workload to public cloud over time, backfill new capabilities | Legacy modernization, end-of-life systems |
| Mixed Models | Custom combinations of platforms to meet individual teams, apps needs | M&A integrations, decentralized IT |
Based on your workloads and infrastructure, you can take one of these approaches or customize your own hybrid model. Consulting with cloud experts is highly recommended before finalizing architectural decisions.
6 Steps to Set Up Hybrid Cloud
Migrating business systems to leverage hybrid cloud unlocks new efficiencies but requires careful planning:
1. Set Strategy
Define your overall cloud strategy and target business goals. Analyze how hybrid will benefit enterprise teams and systems.
2. Classify Data and Apps
Catalog infrastructure, data stores, applications and dependencies. Identify security, compliance and performance needs.
3. Map Migration Pathways
With priorities defined, map which data/apps stay on-premises based on control needs. Design public cloud migrations.
4. Evaluate Cloud Providers
Choose providers that best fit your requirements including services offered, discounts and integration support.
5. Test Hybrid Connectivity
Set up VPNs/Direct Connect between on-prem and cloud networks. Validate throughput, failover and QoS across connections.
6. Extend Identity and Access
Integrate on-prem Active Directory and cloud Identity and Access Management (IAM) for simplified access controls.
While multi-step, you can leverage cloud experts to actualize hybrid infrastructure that flexibly powers digital initiatives at enterprise scale.
Hybrid Cloud Benefits and Metrics
Let‘s examine four major motivations driving businesses to embrace hybrid cloud solutions:
1. Increased Business Agility
Hybrid provides ultimate deployment flexibility to shift storage and compute to optimal locations. This agility helps you keep pace with market changes. Per IDG research, 78% of IT leaders cite improved agility as the primary reason to adopt hybrid cloud.
2. Enhanced Security
You can use infrastructure isolation controls to silo sensitive applications and data on private cloud servers, while hosting public-facing services in the public cloud. The US Federal government mandates this model.
3. Greater Cost Efficiency
Right-sizing workloads to ideal platforms curtails waste. Finite private cloud capacity plus movable public cloud cycles prevents over-provisioning. This graphic estimates potential three-year cost savings:
![Graph comparing total cost of ownership on pure public cloud versus pure private cloud versus hybrid cloud]
4. Seamless Scalability
Rules-based data movement facilitates “cloudbursting” whereby private apps gracefully scale onto the public cloud during peak events. 98% of IT leaders confirm hybrid cloud’s seamless scalability as a key benefit in an AHEAD survey.
Beyond these universal advantages, hybrid cloud also crucially enables digital transformation and the shift to cloud-first strategies for many modern enterprises.
Key Challenges to Address
Hybrid cloud adoption also introduces new technological and operating model complexities that must be addressed:
IT Skills Realignment – Adopting hybrid cloud necessitates reskilling and realigning IT teams to focus on emerging disciplines like cloud automation, container orchestration and DevOps-centric workflows. Leadership must prioritize training.
Cultural Resistance – Beyond upskilling challenges, moving from on-prem ops models to cloud ways of working causes cultural friction. Expect some resistance! Gradually acclimate staff to cloud-first mentalities.
Inconsistent Management – Each public cloud platform has proprietary tools. Managing private infrastructure plus multiple public console UIs leads to shaky governance. Invest in central cloud management platforms.
Cloud Vendor Lock-In – Though hybrid aims to prevent lock-in, leveraging native features on a specific public cloud underlying your application risks architectural dependence on that provider. Mitigate with portability techniques.
Migration Complexity – Re-architecting legacy monoliths is complex due to tight component coupling. Successful migration requires clear segmentation of domain services to correctly integrate across platforms.
Compliance Risks – Incorrectly sharing data across platforms or inadequate identity management could violate data residency laws in highly regulated industries. Carefully vet configurations to minimize compliance failures.
The Future of Hybrid Cloud
While cloud-only systems may dominate future enterprise designs, mission-critical systems with high security, low latency or isolated processing needs will remain on dedicated infrastructure. The true vision for hybrid cloud is an integrated fabric allowing businesses to freely deploy any app or data onto the optimal platform.
As cloud providers expand global infrastructure and foster easier workload portability through containers and orchestration, complex hybrid architectures will gradually give way to seamless unified hybrid cloud environments.
In closing, disciplined hybrid cloud deployment unlocks the next level of IT transformation – where previously isolated legacy systems operate harmoniously alongside cutting-edge cloud-native applications and platform services distributed across the optimal locations.
