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Our DNS TTL was 86400. The outage lasted 23 hours.
we updated the A record. the world didn't get the memo. DNS not resolving — old IP still cached across the internet.
• Migrated load balancer to new IP — old LB decommissioned at 2am. clean cutover. textbook.
• Updated the A record in Route53 — dig confirmed new IP locally. monitoring green. went to bed.
• 7am — support tickets explode — 30% of customers still hitting the dead IP. resolvers cached it.
• TTL was 86400. one full day. — no rollback. no flush. just wait. and watch the graphs.
Lesson: 86400 is not a TTL. it's a hostage situation.
Follow @devopswithkosa for weekly DevOps war stories.
Real incidents. Real chaos. Real lessons.
#DevOps #SoftwareEngineering #TechStories #CodeLife #SRE #Programming #DevOpsNightmares #TechTok #DNS #Route53 #Networking #SRE #Outage #DevOps
Видео Our DNS TTL was 86400. The outage lasted 23 hours. канала DevOps with Kosa
• Migrated load balancer to new IP — old LB decommissioned at 2am. clean cutover. textbook.
• Updated the A record in Route53 — dig confirmed new IP locally. monitoring green. went to bed.
• 7am — support tickets explode — 30% of customers still hitting the dead IP. resolvers cached it.
• TTL was 86400. one full day. — no rollback. no flush. just wait. and watch the graphs.
Lesson: 86400 is not a TTL. it's a hostage situation.
Follow @devopswithkosa for weekly DevOps war stories.
Real incidents. Real chaos. Real lessons.
#DevOps #SoftwareEngineering #TechStories #CodeLife #SRE #Programming #DevOpsNightmares #TechTok #DNS #Route53 #Networking #SRE #Outage #DevOps
Видео Our DNS TTL was 86400. The outage lasted 23 hours. канала DevOps with Kosa
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26 апреля 2026 г. 23:31:38
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