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Availability

Status

Status: Limited peer review

TDA Precedence

TDA Submission Relationship
67 Digital Admissions Influenced by
75 Activate Account Used in answers and approved (version 0.1.0)

NFRs

NFRs Relationship
NFR.001 Potentially Answers
NFR.002 Potentially Answers
NFR.027 Potentially Answers
NFR.053 Partially Answers
NFR.055 Potentially Answers
NFR.081 Potentially Answers
NFR.071 Potentially Answers
NFR.057 Partially Answers

Means to achieve

1 - UIS Terraform Modules and Boilerplate

The web service is expected to be available 24/7 under normal circumstances.

Exceptions to this include:

  • automatic managed service updates outside of normal working hours
  • major database version changes that may require manual updates during work hours approximately every 2-3 years.

The service is self-healing. The service is tolerant to network failures and uses components that are HA, unless they do not effect direct delivery of the service. The service is tolerant to cloud zone failures (e.g. switch, power system, etc.) and is multi-zonal. See https://cloud.google.com/compute/docs/regions-zones.

Backups are performed daily. Backups can be used to recover state to datastores in the event of ransomware attack from before the point off attack. See Data Backup Service.

DevOps change practices are followed: https://docs.google.com/document/d/1tGIYU-11l7G7byz1IZw-mhDHjJMPRnS_rIrAX5esyTM/edit?usp=sharing.

For public domains a service uptime check is included.

Compliance Requirements