K8 Deployent Strategies

It is a technique where application need to be updated/migrated from one version to other version.

Objective to achive

Zero Downtime

Faster rollback

Quick feedback

Quick to Market

More frequently

By default K8 support only 2 , recreate and rolling update(k8 default). We need to make use of ISTIO Mesh for Canary and Blue Green.

Recreate : 1st delete/terminate , then create new image and deploy --- there is a downtime

Rolling Update : For every old replica, 1st create new replica then delete old one step by step

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Blue Green

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Canary

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