AWS CodeDeploy 支援 BlueGreenDeployment

AWS CodeDeploy 推出了 BlueGreenDeployment 的功能:「AWS CodeDeploy Introduces Blue/Green Deployments」。

BlueGreenDeployment 的目的不計成本想辦法把上線的 downtime 壓到最低,而且當出問題時 rollback 的時間壓到最低的方法:

One of the challenges with automating deployment is the cut-over itself, taking software from the final stage of testing to live production. You usually need to do this quickly in order to minimize downtime.

Blue-green deployment also gives you a rapid way to rollback - if anything goes wrong you switch the router back to your blue environment.

其實就是直接跑兩個環境 (所以成本比較高),一套跑舊的一套跑新的,然後在前面的 load balancer 切換:

The blue-green deployment approach does this by ensuring you have two production environments, as identical as possible.

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