Huawei Cloud DCS Master-Slave Failover (AZ Power-Off) Drill

Overview

This tool safely performs a DCS (Redis) master-slave failover drill on Huawei Cloud, verifying instance HA capability under AZ power-off (master node failure) scenarios. It runs a three-phase pipeline:

prepare (checks + risk assessment) -> execute (failover) -> report (generate report)

• prepare: query DCS instance, check IAM permissions, architecture hard-gate (ha + cross-AZ + RUNNING), generate experiment config directory, and run risk assessment
• execute: load config, safely execute master-slave failover (ChangeMasterStandby), poll for completion, data consistency check
• report: read config and execution result, generate comprehensive HTML report (instance info, safety checks, topology change, failover timeline, data consistency check)

Triggers / Trigger Conditions

Triggered when the user needs to perform a DCS master-slave failover, switchover, fault drill, AZ power-off drill, or failover experiment.

Triggers: DCS主备倒换, 主备倒换演练, DCS故障演练, 主备切换, 倒换实验, dcs failover, DCS failover, 高可用演练, 高可用验证, DCS HA切换, AZ断电演练, 主备互换, DCS switchover, Redis故障演练, DCS容灾演练