Zero downtime deployment // cicd

Dear all, For our current project at a credit card company, we are looking to prevent down time when pushing updates to the node. We are currently using a CICD pipeline working with github. We were wondering if, hypothetically, it would be possible to use two nodes for deployment: Node 1 runs as normal Node 2 created as back up; When up, node 1 is updated. Node 1 is active again after updating, now node 2 can go offline. I read another post in the forum about this topic, but it is more than a year old. Is such a thing now possible? Any experiences? Thanks ahead for thinking along. Best regards, Wouter
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