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- for file-based imports, use
- for server imports serving public data, ftp / http can be used (encryption would provide unnecessary overhead), other services in need of passwords should should use a secure connection / https
Kubernetes
Kubernetes uses Docker containers. A container is a "lightweight" abstraction layer on top of the host operating system. Multiple containers share the machine’s operating system kernel and do not require the overhead of associating an operating system within each application. In comparison with VMs, containers bring reduced start-up time, more compute capacity, more flexibility, fault isolation, ease of management, simplified security and reduced costs. The operational benefits for Delft-FEWS systems are also in line with the Roadmap plans for automation of installations with less needless customization, better auto-scaling and more flexible testing. We prefer using linux containers as much as possible. Whether linux containers can be used may depend on the requirements of the forecast model. Any Windows-based forecast models can be separately run on Windows hardware, Windows VMs (or in a Windows docker container).
Important cost variables
An estimate for the cost for a basic/medium-sized Delft-FEWS system in the cloud would be around 12k€- 15k€. Many cloud providers offer a "cloud calculator" to calculate, upfront, the expected cost, e.g. Azure calculator. The estimate differs per Delft-FEWS system.
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Cloud providers offer managed services like for example a managed database. The price for a managed solution is higher than an unmanaged solution. However, a managed solution requires a lot less of your own IT-staffing hours regarding managing the system.
Kubernetes
Kubernetes uses Docker containers. A container is a "lightweight" abstraction layer on top of the host operating system. Multiple containers share the machine’s operating system kernel and do not require the overhead of associating an operating system within each application. In comparison with VMs, containers bring reduced start-up time, more compute capacity, more flexibility, fault isolation, ease of management, simplified security and reduced costs. The operational benefits for Delft-FEWS systems are also in line with the Roadmap plans for automation of installations with less needless customization, better auto-scaling and more flexible testing. We prefer using linux containers as much as possible. Whether linux containers can be used may depend on the requirements of the forecast model. Any Windows-based forecast models can be separately run on Windows hardware, Windows VMs (or in a Windows docker container).
Additional requirements
High Availability, Disaster Recovery, performance
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