HW/VM Vendors Limitations
Before choosing a particular vendor, we suggest reviewing the frequently faced limitations of some of the most popular service providers. These restrictions can affect the platform deployment and functionality.
Virtualization technology - defines the virtualization type used by particular vendors.
Platform editions:
- Business edition – the typical case of the Virtuozzo Application Platform installation, which provides a complete list of features, includes business and technical support, as well as a turnkey installation and configuration performed by the platform engineers according to the specific project needs.
- WordPress edition - a dedicated platform for WordPress hosting, which provides only features and packages necessary for the task. It offers a number of prepackaged topologies of varying complexity, which covers a wide range of use cases (from small testing installation to enterprise-level clusters).
- Lite edition - a personal PaaS with an automated installation on Google Cloud, DigitalOcean, or Vultr from the convenient prepackaged image. It is specifically designed as a lightweight version for smaller customers that require a virtual private cloud but have a limited budget.
The linked document provides a comprehensive overview of the Virtuozzo Application Platform editions.
Highly available storage - defines the availability of storage with extra capabilities and reliability.
Since Cloud Storage is not compatible with virtualization, it can actually be installed on bare-metal servers only.
Virtuozzo Hybrid infrastructure (VHI) provides its own highly available storage out-of-the-box, so there is no need to use any extra redundancy on the hosts (virtual machines) level.
Private network availability:
- Some service providers don’t support managed private L2 networks and the attachment of more than one internal IP address to a single VM instance. Thus additional OpenVSwitch-based overlay networks should be configured.
IPv4/IPv6 external network availability:
- Some service providers bind IPs to a specific host, making it necessary to re-attach this IP address to a different host upon container migration, which is not possible on the platform at the moment. Also, some service providers do not support attaching more than one public IP address to a single VM instance (Limited capabilities).
- Some service providers do not support attaching public IP addresses directly to node instances (marked as "No").
Network protocol stack:
Keep in mind that some service providers do not support protocols other than ICMP/UDP/TCP/ESP.
Windows VM Support:
It is available only for bare-metal servers, as nested virtualization is not supported. However, Windows VM Support can be enabled for any platform by adding a dedicated bare-metal host in a separate host group/region (specifically for Windows VM purposes) that meets the appropriate hardware requirements.
