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Migrating & Upgrading GitLab 15.6.1 to 19.2: New Box, Going Private, Cutover Behind Production
DevOpsAWS

Migrating & Upgrading GitLab 15.6.1 to 19.2: New Box, Going Private, Cutover Behind Production

One long night migrating GitLab EE 15.6.1 to 19.2. Build a new box, restore, step-upgrade through a dozen required-stops, move GitLab from public (Cloudflare + ELB) to private (NLB + PrivateLink + Transit Gateway), then cut over with split-horizon DNS — all without touching the old box. With real upgrade bugs, speed-up tricks, and seven post-cutover issues and their fixes.

K
KaiJuly 25, 2026· 33 views