High Availability in Private and Public Clouds
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Migrating your applications into a private or public cloud won’t solve it’s high availability challenges. Public cloud infrastructure is usually designed for application developers that know what they’re doing; to make the most out of a public cloud deployment your applications have to be well-designed. For more details read:
- Reliable or Unreliable Cloud Services? (2011)
- Are Your Applications Cloud-Friendly? (2013)
- You're Responsible for Resiliency of Your Public Cloud Deployment (2020)
Typical enterprise software development organizations disagree with that gloomy view, and virtualization vendors are more than happy to build an alternate-reality world for them in which stretching subnets and migrating live virtual machines into a public cloud makes sense. Unfortunately, the laws of physics don’t care about vendor marketing.
- Public Cloud Cannot Change the Laws of Physics (2020)
- The Myth of Scaling From On-Premises Data Center into a Public Cloud (2020)
- When All You Have Are Stretched VLANs... (2020)
- Multi-Cloud: Myths and Reality (2022)
- Rant: VMware Cloud on AWS Marketing and Reality (2017)
- Stretched Layer-2 Subnets in Azure (2019)
- Live vMotion into VMware-on-AWS Cloud (2020)
When your application developers figure out they have to respect the laws of physics your work has just started – you have to design your virtual networking environment before the applications are deployed, carefully considering failure domains usually known as availability zones and regions:
- Why Is Public Cloud Networking So Different? (2020)
- AWS Networking 101 (2020)
- Azure Networking 101 (2020)
- Availability Zones and Regions in AWS, Azure and GCP (2021)
- Virtual Networks and Subnets in AWS, Azure, and GCP (2021)
- Impact of Azure Subnets on High Availability Designs (2021)
- AWS Automatic EC2 Instance Recovery (2022)
Finally, if you plan to build a private cloud infrastructure, you might find these blog posts useful:
- Combine Physical and Virtual Appliances in a Private Cloud (2014)
- Use a Disaster Recovery Project to Build Your New Cloud (2014)
- Building Carrier-Grade Cloud Infrastructure (2015)
Want to know more? Explore the cloud networking webinars, in particular: