Resources to Backup
Since an installation in AWS is done using Infrastructure as Code, it is not necessary to back up the application itself. The resources that need to be backed up are
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Private cloud preparations are noted on the Preparations - Private Cloud page.
General Requirements
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Schedule – When the backup occurs. Make sure to align this with you cold backup window defined in previous step!
Backup window – The window of time in which the backup needs to start. Make sure to align this with you cold backup window defined in previous step!
Lifecycle – When to move a recovery point to cold storage and when to delete it
Backup vault – Used to organize recovery points created by the Backup rule.
- Backups should be taken as snapshot backups. I.e do not enable "continuous backups for point-in-time recovery (PITR)" as that can lead to unpredictable behaviour.
If AWS Backup is not available as a service in your region, the recommendation is to use EFS to EFS backup, see https://aws.amazon.com/solutions/implementations/efs-to-efs-backup-solution/.
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To protect against multi availability-zone failures (unlikely) or human errors (more likely) snapshot backups to different region can be enabled. This is described in https://docs.aws.amazon.com/memorydb/latest/devguide/snapshots-automatic.html. Follow these instructions to configure:
- Snapshot window - A period during each day when MemoryDB begins creating a snapshot. The minimum length for the snapshot window is 60 minutes. Although not required for consistency, it is recommended to align this with your cold backup window (if enabled) as configured in step 1.
- Snapshot retention limit – The number of days the snapshot is retained in Amazon S3.
5. Kubernetes Managed Resources
Kubernetes managed resources are:
platform application
- ECDs - Solution deployment descriptors
- Supporting applications like Prometheus, Grafana and ElasticSearch (note that the state and data held by these supporting applications are not covered by the scope of this document)
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At the time of writing RDS backup cost $0.05 per GB-Month and EFS cost $0.095 per GB-Month, both prices being for Warm Storage. MemoryDB snapshots is free for one snapshot backup. Storage space for additional snapshots is charged at a rate of $0.085/GB per month for all AWS Regions (at the time of writing 2021-09-30).