How we migrated 40 ClickHouse clusters: strategies, checks, and automation
Mindbox SRE engineer Dima Rybalka shares his experience of migrating 40 ClickHouse clusters to Yandex Cloud. The two-month project involved selecting a migration strategy, establishing connectivity between clusters without VPNs, and implementing a cutover process to ensure zero downtime. The author details the automation steps, data integrity verification methods, and technical challenges encountered post-migration. This article serves as a practical guide for SRE, DevOps, and DBA engineers working with ClickHouse in Kubernetes environments. Special attention is given to minimizing risks when handling high-load databases and ensuring a seamless transition to a new cloud platform.
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