Cloud Active/Passive Resiliency
Active/Passive resiliency patterns with automatic recovery mechanisms like Kubernetes allow you to accomplish automatic failover without manual intervention in the event of node or availability zone failure.
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Combines With
Ensure you have perfected the Backup/Same-Site Restore pattern before combining it with more advanced patterns like this one
Problems Addressed
Automatic recovery from application node failure
Availability zone outages
Prerequisites
Requires external PostgreSQL database
Shared storage (AWS S3/Azure blob stores)
Factors to Consider
Failover can take up to 10 minutes
Available Resources
We have the following comprehensive help topics and sample files to help implement this pattern: