From multiple AppSRE emails (received June 12, 2023) with a required completion date of December 15, 2023.

This email is related to Elasticache Redis instance upgrades that are required
for those instances still in 5.0.5 version. AWS is requiring (and forcing if
not done) the upgrade to 5.0.6 version.

Your instance

1. receptor-redis - in the AWS account insights-stage
2. receptor-redis - in the AWS account insights-perf 
3. payload-tracker-redis - in the AWS account insights-stage 

in the AWS account insights-stage is still running Redis 5.0.5. The deadline
for the upgrade is set on December 15, 2023, 21:59:59 (UTC).

In order to have a greater degree of control of the upgrade, we would like that
you perform it via app-interface before this date. To minimise the impact in
your service, please make sure that your instance is configured as AWS
recommends [1].

Your instance AWS configuration can be modified in app-interface through the file
data/services/insights/receptor/namespaces/stage-receptor-stage.yml.

Please make sure the following configuration values are correctly configured:

• number_cache_clusters is at least 2
• multiaz_enabled is set to true
• automatic_failover_enabled is set to true

before the moment of the upgrade.

In order to trigger the upgrade, you will need to:

• Set engine_version to 5.0.6
• Set apply_immediately to true

In case of doubt, you can use the app-interface Elasticache documentation [2]

Please feel free to reach out with any questions or concerns.

[1] https://aws.amazon.com/elasticache/elasticache-maintenance/#Continuous_Managed_Maintenance_Updates
[2] https://gitlab.cee.redhat.com/service/app-interface#manage-elasticache-databases-via-app-interface-openshiftnamespace-1yml

Sincerely,

The AppSRE Team.