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High Availability (HA) refers to architectural and operational principles that minimize downtime and ensure continuous service availability.
High availability (HA) denotes architectural and operational practices aimed at minimizing downtime and keeping services continuously accessible. It includes redundancy, failover, replication, monitoring and recovery procedures. Implementing HA requires careful design, automated testing and operational runbooks to handle failures and maintain service levels for critical applications.
Measures the percentage of time a service is reachable.
Average time to fix a failure and restore services.
Share of failed transactions or requests after failover events.
Multiple API servers, etcd replication and a load balancer provide control plane redundancy.
Synchronized replicas and automated failover ensure transactional availability.
Load distribution across regions with geo-redundant storage reduces outage risk.
Requirements analysis and SLA definition
Design redundancy and failover mechanisms
Implementation, testing (chaos tests) and automation
Create runbooks and operations training